OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Salmon, Arthur
Brulon, Cyprien
Fix, Baptiste
Verlhac, Clément
Bouchon, Patrick
Abrégé
An electromagnetic radiation detector (1) comprises at least one antenna (2), a portion (3) which is absorbing in a spectral band of resonance of the antenna, and means for detecting the heating produced by the absorbing portion. The antenna concentrates an electric field of electromagnetic radiation (R) to be detected within an area of concentration of the field (ZC) where the absorbing portion is located. Such detector may be functional for detecting radiation within the infrared range or the terahertz range. It may be used to create a detector for detecting image points in a two-dimensional structure so as to form an image sensor.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Pelletier, Nicolas
Corato, Christophe
Abrégé
5 S/m; a thermal insulation element partially covering said calorimetric element so as to define a first planar portion which is not covered by the calorimetric element and is configured to be exposed to the heat flux contained in the front face, and a second portion of the calorimetric element being thermally insulated from said heat flux. The sensor includes two wire-based conductive elements which pass through said calorimetric element and are arranged not to be in mechanical contact with one another but to be in electrical contact via said calorimetric element, the two wire-based conductive elements being made of two different thermoelectric materials.
G01K 7/04 - Mesure de la température basée sur l'utilisation d'éléments électriques ou magnétiques directement sensibles à la chaleur utilisant des éléments thermo-électriques, p.ex. des thermocouples l'objet à mesurer ne formant pas l'un des matériaux thermo-électriques
G01N 25/22 - Recherche ou analyse des matériaux par l'utilisation de moyens thermiques en recherchant la production de quantités de chaleur, c. à d. la calorimétrie, p.ex. en mesurant la chaleur spécifique, en mesurant la conductivité thermique sur l'oxydation par combustion ou par catalyse, p.ex. des constituants des mélanges gazeux
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Lombard, Laurent
Abrégé
A pulsed LIDAR system has a transmission path which is configured so that two pulses which are successively emitted are spectrally disjoint and associated with different respective central wavelength values. A signal-to-noise ratio of a heterodyne detection signal is improved in this manner. A LIDAR system of this kind can be implemented using optical fibers, and is particularly suitable for airspeed measurements.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Scherman, Michael
Lin, Elodie
Abrégé
The present invention relates to a multipoint optical measuring device (1) comprising a source (2) for emitting laser pulses, at least two splitting modules (4) intended to be passed through by said pulses and to split an incident laser beam (7) into a plurality of parallel beams (8), at least one converging lens (5) that is interposed between the source (2) and the splitting module (4), a measuring zone (6) that is intended to receive a medium or sample to be measured (10) and that is located in a focal plane (16) of said converging lens (5), each splitting module (4) comprising, on the one hand, a first uniaxial birefringent crystal and, on the other hand, an identical second crystal placed after the first crystal on the path of the pulses, the first birefringent crystal being configured to split an incident laser beam (7) into an ordinary secondary beam and an extraordinary secondary beam, the second birefringent crystal being oriented with respect to the first crystal so that the extraordinary secondary beam obtained from the laser beam (7) takes an ordinary path through the second birefringent crystal, and so that the ordinary secondary beam obtained from the laser beam (7) takes an extraordinary path through the second birefringent crystal, the pulses of the beams (8) output from the modules (4) reaching simultaneously and at multiple points (9) the medium or sample to be measured (10).
G02B 27/28 - Systèmes ou appareils optiques non prévus dans aucun des groupes , pour polariser
G01N 21/00 - Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c. à d. en utilisant des ondes submillimétriques, de la lumière infrarouge, visible ou ultraviolette
G01J 3/00 - Spectrométrie; Spectrophotométrie; Monochromateurs; Mesure de la couleur
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Lombard, Laurent
Dolfi-Bouteyre, Agnès
Abrégé
A pulsed LIDAR system has a transmission path that is configured to form each pulse as a superposition of a plurality of pulse spectral components that are emitted simultaneously. A signal-to-noise ratio of a heterodyne detection signal is improved in this manner. A LIDAR system of this kind can be implemented using optical fibers, and is particularly suitable for performing airspeed measurements.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
CENTRE NATIONAL D'ETUDES SPATIALES C N E S (France)
Inventeur(s)
Lemaitre, François
Cezard, Nicolas
Hebert, Philippe-Jean
Abrégé
A LIDAR system which is intended for performing distance measurements is adapted to implement a pulse-compression effect. To this end, a transmission path of the LIDAR system includes two transfer pathways which are arranged in parallel, and at least one of the transfer pathways includes a pulse-compression modulator. A detection path of the LIDAR system includes a digital processing module configured to calculate a correlation function between measurement detection signals and reference detection signals. The improvements of double heterodyne detection and a comb-shaped pulse spectrum may optionally be used.
G01S 17/26 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues dans lesquels les impulsions transmises utilisent une onde porteuse modulée en fréquence ou en phase, p.ex. pour la compression d'impulsion des signaux reçus
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Gallas, Quentin
Derhille, Elvina
Abrégé
A system for controlling aeraulic conditions existing above an aerial arrival zone includes anemometric components and aeraulic components. The anemometric components deliver speed and bearing angle values that characterize a relative wind speed with respect to the aerial arrival zone and to a superstructure located close to the aerial arrival zone. The aeraulic components are capable of modifying air movements above the aerial arrival zone, and are controlled according to the wind speed and bearing angle values. Such a system is particularly suitable for use on board a ship able to carry a helicopter, in particular on its afterdeck.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Elias, Paul-Quentin
Debek, Radoslaw
Galvez, Maria Elena
Abrégé
A dielectric barrier discharge plasma reactor, for activating a gas-phase chemical reaction, includes at least one tubular pipe made of dielectric material, an inner electrode and an outer electrode. The inner electrode is limited to the inlet of an active zone of the reactor, so that voltage pulses applied between both electrodes generate propagating discharges in the active zone. The reactor produces a volume-contact between a gas stream containing reactants and a plasma created by the discharges, allowing effective transfer of activation energy between the plasma and the reactants.
B01J 19/08 - Procédés utilisant l'application directe de l'énergie ondulatoire ou électrique, ou un rayonnement particulaire; Appareils à cet usage
C01B 3/04 - Production d'hydrogène ou de mélanges gazeux contenant de l'hydrogène par décomposition de composés inorganiques, p.ex. de l'ammoniac
C01B 3/26 - Production d'hydrogène ou de mélanges gazeux contenant de l'hydrogène par décomposition de composés organiques gazeux ou liquides d'hydrocarbures avec des catalyseurs
C01B 32/05 - Préparation ou purification du carbone non couvertes par les groupes , , ,
C07C 1/12 - Préparation d'hydrocarbures à partir d'un ou plusieurs composés, aucun d'eux n'étant un hydrocarbure à partir d'oxydes de carbone à partir d'anhydride carbonique avec de l'hydrogène
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Duran, Juan
Martel, Cédric
Prigent, Gaëtan
Pascal, Olivier
Abrégé
An array antenna is formed from delay lines, and includes radiating elements which are individually connected to line patterns of the delay lines. Such an array antenna structure can be implemented by printed circuit technology and can be used to establish radio links for data communication between a mobile carrier, such as an aircraft, and a geostationary satellite.
H01Q 1/28 - Adaptation pour l'utilisation dans ou sur les avions, les missiles, les satellites ou les ballons
H01Q 1/32 - Adaptation pour l'utilisation dans ou sur les véhicules routiers ou ferroviaires
H01Q 1/34 - Adaptation pour l'utilisation dans ou sur les navires, les sous-marins, les bouées ou les torpilles
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 13/26 - Guide d'onde en surface constitué par un seul conducteur, p.ex. bandes conductrices
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
SAFRAN REOSC (France)
Inventeur(s)
Jonquiere, Hugo
Mugnier, Laurent
Mercier-Ythier, Renaud
Abrégé
Method for estimating a geometry of a reflective surface, which method comprises the steps of measuring (10) a slope field ({right arrow over (P)}) of the surface by means of a deflectometry device (1) connected to a measurement processing computer, then integrating (20) the slope field by modelling the presence of a rotational component ({right arrow over (A)}) in the field, and by jointly searching for a gradient component (ϕ) of said field and alignment errors ({right arrow over (Pα)}), which consist of rotational components, of the deflectometry device.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Sallot, Pierre Jean
Huvelin, Zhao
Perrut, Mikael
Bachelier-Locq, Agnès
Abrégé
The present disclosure relates to the technical field of TiAl intermetallic foundry alloys. More particularly, it relates to such an alloy comprising:
44≤Al≤47 at. %;
0
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Passilly, Bruno
Gaverina, Ludovic
Abrégé
The invention relates to an adapter (1) for a device for non-destructive testing by means of electromagnetic radiation, the adapter (1) comprising: - a proximal portion (3) configured to be attached to a testing device; and - a distal portion (5) comprising a contact element (7) forming a free end and mounted so as to be movable relative to the proximal portion (3) such that the distal portion (5) deforms when a force is applied to the contact element (7), the contact element (7) being connected to the deformable member by a ball-and-socket joint or a pivot link, the contact element (7) being parallelepiped in shape.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Le Traon, Olivier
Levy, Raphaël
Guerard, Jean
Perrier, Thomas
Abrégé
A resonator is suitable for reducing or suppressing a force transmitted by a vibrating portion of the resonator to a support part. To this end, the vibrating portion includes two extensions which are each meander shaped such that two segments of each extension have respective speed components that are oriented in opposite directions. Such a resonator, which is balanced, can advantageously be used within a rate gyro or a force sensor.
G01C 19/5733 - Dispositifs sensibles à la rotation utilisant des masses vibrantes, p.ex. capteurs vibratoires de vitesse angulaire basés sur les forces de Coriolis utilisant des masses planaires vibrantes entraînées dans une vibration de translation le long d’un axe - Details de structure ou topologie
G01L 1/16 - Mesure des forces ou des contraintes, en général en utilisant les propriétés des dispositifs piézo-électriques
G01L 5/04 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques pour la mesure de la tension dans les éléments flexibles, p.ex. dans les cordages, les câbles, les fils métalliques, les filaments, les courroies ou les bandes
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Duveau, Louis
Druart, Guillaume
Abrégé
An imaging optical system including three mirrors has a configuration adapted to block stray rays which could otherwise reach an image sensor of the system, while permitting large fields, high apertures, and good system compactness. The system may also incorporate two entrance baffles which are arranged one on either side of an optical entrance of the system. Functions of the two entrance baffles may be limited to intercepting rays originating from fields which are angularly distant from the entrance field useful to each captured image. The two entrance baffles can thus have reduced lengths upstream, so that the system has a small size.
G02B 17/06 - Systèmes catoptriques, p.ex. systèmes redressant et renversant une image utilisant uniquement des miroirs
G02B 23/06 - Télescopes ou lunettes d'approche, p.ex. jumelles; Périscopes; Instruments pour voir à l'intérieur de corps creux; Viseurs; Pointage optique ou appareils de visée comprenant des prismes ou des miroirs ayant une action de mise au point, p.ex. miroir parabolique
15.
DETECTOR FOR SURFACE-ENHANCED INFRARED ABSORPTION SPECTROSCOPY
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Fabas, Alice
Bouchon, Patrick
El Ouazzani, Hasnaa
Haïdar, Riad
Hugonin, Jean-Paul
Greffet, Jean-Jacques
Abrégé
A detector (100) for surface-enhanced infrared absorption spectroscopy comprises resonators which are distributed over a surface (S) of a support (1), said surface being intended to receive a sample (101) to be tested. The resonators are able to provoke a spectral reflectance of at least 40% for electromagnetic radiation that is incident on the surface of the support, in the absence of a sample, and when the radiation is at the resonance wavelength value of the resonators. The detector has high sensitivity to small amounts of a target molecule.
G01N 21/3577 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse de liquides, p.ex. l'eau polluée
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Le Traon, Olivier
Levy, Raphaël
Guerard, Jean
Perrier, Thomas
Abrégé
An inertial angular position sensor includes at least three identical resonators which are arranged symmetrically about a sensitive axis of the sensor, so that a rate gyro constructed from the sensor has an integrating operation. The sensor further includes a coupling element which connects a vibrating portion of each resonator to the vibrating portions of all other resonators of the sensor. Preferred configurations for the inertial angular position sensor allow obtaining integrating rate gyros with high sensitivity and low production cost.
G01C 19/5733 - Dispositifs sensibles à la rotation utilisant des masses vibrantes, p.ex. capteurs vibratoires de vitesse angulaire basés sur les forces de Coriolis utilisant des masses planaires vibrantes entraînées dans une vibration de translation le long d’un axe - Details de structure ou topologie
17.
Fairing element for surrounding an obstacle in a fluid flow
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Barrier, Raphaël
Abrégé
Disclosed is a fairing element intended to be placed in a passage for flow of a fluid, in order to surround an obstacle which crosses the passage so that the fairing element guides the flow of the fluid on two opposite sides of the obstacle. The fairing element is designed such that the pressure of the flowing fluid is constant or approximately constant in an upstream part of the suction surface of the fairing element. A fairing element of this kind can be incorporated into a stator of a turbomachine, in particular of an aircraft turbomachine.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
UNIVERSITE DU MANS (France)
Inventeur(s)
Fleury, Bruno
Picart, Pascal
Piniard, Matthieu
Sorrente, Béatrice
Abrégé
A device for manufacturing a piece with addition of material includes an optical inspection unit for capturing at least one holographic image of a transformation zone of the material, in real time while the piece is being manufactured. A processor then characterizes a topography of the transformation zone from each holographic image. Such manufacturing device may be in particular of 3D-printer type, or a welding device.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Michel, David Tomline
Mugnier, Laurent
Valla, Matthieu
Abrégé
A process and system for detection and telemetry using electromagnetic radiation pulses allows characterization of a radial velocity distribution as a function of a separation distance within an exploration zone. An impulse response from the system is used for decomposing a measurement signal which is collected for each acquisition sequence performed for a useful measurement. The result of the decomposition includes an estimate of the radial velocity distribution as a function of the separation distance.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Druart, Guillaume
Domel, Roland
Mas, Adrien
Compain, Eric
Favier, Sylvain
Abrégé
The invention relates to an optical imaging system which comprises multiple optical paths (21, 22) arranged in parallel, and which is athermalized. It is further suitable for preventing image overlap occurring inside useful areas of a matrix image sensor (1) that is common to the optical paths. A thermal compensation device (3) for effecting the athermalization is also used to support a baffle (4) which removes image overlap in the useful areas. As a result, the system can be quite compact. It can be used to search for a specific gas in a scene.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Salmon, Arthur
Bouchon, Patrick
Abrégé
A two-dimensional terahertz radiation detector includes a spectral conversion element, an array of microlenses, and a matrix image sensor. Such a detector can be particularly compact, light, and inexpensive. For some embodiments, it can be used to produce multispectral images of an external scene, from terahertz radiation that originates from the scene.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Gea Aguilera, Fernando
Barrier, Raphaël
Gruber, Mathieu Simon Paul
Polacsek, Cyril
Posson, Hélène Dominique Jeanne
Abrégé
A turbomachine includes a rotor and a stator, the stator having a plurality of profiled structures, each profiled structure being elongated in a direction of elongation in which the profiled structure has a length exposed to an airflow, and having a leading edge and/or a trailing edge, at least one of which is profiled and has, in said direction of elongation, serrations defined by a succession of peaks and troughs and having a geometric pattern transformed, over at least a part of said length exposed to the airflow, by successive scaling, via multiplicative factors, in the direction of elongation and/or transverse to the direction of elongation. The geometric pattern, as defined with reference to a radial distribution of the integral scale of the turbulence, evolves in a non-periodic manner.
B64C 21/10 - Moyens permettant d'influencer l'écoulement d'air sur les surfaces des aéronefs en agissant sur la couche limite par utilisation d'autres caractéristiques de la surface, p.ex. la rugosité
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Levy, Raphael
Perrier, Thomas
Lavenus, Pierre
Guerard, Jean
Gaudineau, Vincent
Abrégé
An electrical field detector includes an electromechanical oscillator, part of which is included of a piezoelectric element, a frequency measuring device which is coupled to the oscillator so as to measure the oscillation frequency, and an electrical masking assembly. The electrical masking assembly is arranged close to the piezoelectric element so that, during an use of the detector, the piezoelectric element moves by vibrating relative to the electrical masking assembly. A variable part of the piezoelectric element is thus exposed to the electrical field to be measured. A change in the oscillating frequency then forms an electrical field measurement result.
H03B 5/32 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique un résonateur piézo-électrique
H10N 30/85 - Matériaux actifs piézo-électriques ou électrostrictifs
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Merlinge, Nicolas
Audebert, Clément
Dahia, Karim
Herisse, Bruno
Allard, Jean-Michel
Abrégé
A box regularized particle filtering method implements a binary representation of numbers. This implementation can be used to determine a box division coordinate and/or to modify state intervals according to a fixed probability kernel, for example according to an Epanechnikov kernel. The method can be executed autonomously within a navigation system using measurement correlation, in particular on board an aircraft such as an airplane, a flying drone or any self-propelled airborne vehicle.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Michel, David Tomline
Gustave, François
Abrégé
A method for calibrating a LIDAR system proposes incorporating in the LIDAR system a reference optical path which is formed from an optical fiber. The length of the optical fiber determines a measurement reference value, which can then be used to evaluate distances of targets to be characterized using the LIDAR system. The calibration method is simple and economical to implement. It may be used in particular for a LIDAR system which is designed to perform air speed measurements, in particular on board an aircraft.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 17/95 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la météorologie
G01S 7/481 - Caractéristiques de structure, p.ex. agencements d'éléments optiques
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Rouffie, Anne-Laure
Franchet, Jean-Michel Patrick Maurice
Locq, Didier
Abrégé
A Nickel-based superalloy, whose composition includes, in percent by weight of the total composition: Chromium: 10.0-11.25; Cobalt: 11.2-13.7; Molybdenum: 3.1-3.8; Tungsten: 3.1-3.8; Aluminium: 2.9-3.5; Titanium: 4.6-5.6; Niobium: 1.9-2.3; Hafnium: 0.25-0.35; Zirconium: 0.040-0.060; Carbon: 0.010-0.030; Boron: 0.01-0.030; Nickel: remainder as well as unavoidable impurities; the composition being free of tantalum.
C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
C22C 1/04 - Fabrication des alliages non ferreux par métallurgie des poudres
C22F 1/10 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid du nickel ou du cobalt ou de leurs alliages
27.
IMAGE CAPTURE USING RADIATION-SENSITIVE ELEMENTS HAVING A MEMORY EFFECT
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Krapez, Jean-Claude
Abrégé
Disclosed is a method for capturing images that makes it possible to correct at least partially a memory effect of sensitive elements of a matrix used to capture the images. A corrected image is formed by subtracting, from a captured new raw image, a part of a prior raw image that was captured before the new raw image. The method is particularly suitable for sensitive elements with a first-order transfer function with respect to time, such as bolometers or microbolometers. Correction of the memory effect makes it possible to improve the transfer function and/or reduce a tail effect that is present in the images when scene elements move.
G01J 5/10 - Pyrométrie des radiations, p.ex. thermométrie infrarouge ou optique en utilisant des détecteurs électriques de radiations
H04N 5/374 - Capteurs adressés, p.ex. capteurs MOS ou CMOS
H04N 5/359 - Traitement du bruit, p.ex. détection, correction, réduction ou élimination du bruit appliqué aux porteurs de charge en excès générés par l'exposition, p.ex. bavure, tache, image fantôme, diaphonie ou fuite entre les pixels
28.
PARTICLE FILTERING AND NAVIGATION SYSTEM USING MEASUREMENT CORRELATION
OFFICE NATIONAL D’ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Merlinge, Nicolas
Audebert, Clément
Dahia, Karim
Herisse, Bruno
Allard, Jean-Michel
Abrégé
Disclosed is a box-regularized particle filtering process which includes an Epanechnikov kernel smoothing step. For this purpose, the process uses a special method for generating random numbers that follow an Epanechnikov probability density function. The process can be performed autonomously in a navigation system using correlation measurement, in particular on board an aircraft such as an aircraft, a flying drone or any self-propelled aerial carrier.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
CENTRE NATIONAL D'ETUDES SPATIALES C N E S (France)
UNIVERSITE TOULOUSE III—PAUL SABATIER (France)
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRS (France)
Inventeur(s)
Prost, Daniel
Romier, Maxime
Belot, Daniel
Simon, Patrice
Brousse, Kévin
Taberna, Pierre-Louis
Abrégé
A device is suitable for revealing spatial variations in polarization of an electromagnetic radiation, in a form of localized temperature variations. The device includes a surface of a carrier which is electrically and thermally insulating, and includes an array of patterns which each consist of at least one rectilinear segment of a sensitive material, of which the orientation is variable within each pattern or between neighboring patterns. Such device may be used with a thermal camera to reveal, in infrared images, temperature variations which are localized at segments not perpendicular to a local direction of linear polarization of the radiation.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Trottier, Camille
Abrégé
A method of photothermal analysis of a solid piece includes injecting heat into a region of a surface of the piece, called heating region, capturing a thermal analysis image of a detection region which is distinct from the heating region, then subtracting a reference image from the thermal analysis image. The reference image corresponds to a thermal emission distribution as caused by the injected heat for a case where the surface portion of the piece is without defects. Such method makes it possible to reduce an analysis cycle time for the piece, and to reduce a signal-to-noise ratio of images capable of revealing defects present in the surface portion of the piece.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Rame, Jérémy
Jaquet, Virginie
Delautre, Joël
Guedou, Jean-Yves
Caron, Pierre
Lavigne, Odile
Locq, Didier
Perrut, Mikael
Abrégé
The invention relates to a nickel-based superalloy comprising, in percentages by mass, 4.0 to 5.5% rhenium, 1.0 to 3.0 ruthenium, 2.0 to 14.0% cobalt, 0.3 to 1.0% molybdenum, 3.0 to 5.0% chromium, 2.5 to 4.0% tungsten, 4.5 to 6.5% aluminum, 0.50 to 1.50% titanium, 8.0 to 9.0% tantalum, 0.15 to 0.30% hafnium, 0.05 to 0.15% silicon, the balance being nickel and unavoidable impurities.
The invention also relates to a single-crystal blade (20A, 20B) comprising such an alloy and a turbomachine (10) comprising such a blade (20A, 20B).
ETAT FRANÇAIS REPRÉSENTÉ PAR LE DÉLÉGUÉ GÉNÉRAL DE L'ARMEMENT (France)
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (ONERA) (France)
Inventeur(s)
Binet, Laurent
Pezet, Stéphane
Prunel, Marc
Abrégé
A device for detecting the approach of a vortex ring state for a rotary wing aerodyne, the detection device including a set of vibration sensors configured to be distributed in or on the aerodyne, and a data processing unit configured to receive in real time measurement data from the sensors, process the data in order to calculate in real time the vibration spectrum of the aerodyne, detect in real time, by vibration analysis, the approach of a vortex ring state as a function of the calculated vibration spectrum, and issue an alarm in the event of detection of the approach of a vortex ring state.
B64C 27/00 - Giravions; Rotors propres aux giravions
B64C 19/00 - Dispositifs de commande des aéronefs non prévus ailleurs
G01P 15/18 - Mesure de l'accélération; Mesure de la décélération; Mesure des chocs, c. à d. d'une variation brusque de l'accélération dans plusieurs dimensions
G01H 1/00 - Mesure des vibrations dans des solides en utilisant la conduction directe au détecteur
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Michel, David Tomline
Augere, Béatrice
Valla, Matthieu
Abrégé
A LIDAR system is adapted for performing anemometrical measurements relating to a focusing zone of a laser beam which is emitted by the system. The system includes a temporal control device for the laser beam, which is adapted for putting this laser beam in successive laser pulse form, so that each laser pulse has an individual length which is greater than or equal to twice the Rayleigh length divided by the propagation speed of the laser pulses in the atmosphere, and less than 20 μs. Advantageously, the individual length of each laser pulse is between 0.2 and 5 times the coherence time of the atmosphere which is effective in the focusing zone. Such a LIDAR system provides values for a spectral CNR ratio which are better than those of systems from the state-of-the-art, at equivalent spatial resolution.
G01S 17/58 - Systèmes de détermination de la vitesse ou de la trajectoire; Systèmes de détermination du sens d'un mouvement
G01S 17/95 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la météorologie
G01S 7/48 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
34.
HIGH-QUALITY-FACTOR FLEXURAL-VIBRATION RESONATOR FOR PRODUCING TIME REFERENCES, FORCE SENSORS OR GYROMETERS
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Le Traon, Olivier
Levy, Raphael
Guerard, Jean
Perrier, Thomas
Abrégé
A resonator is suitable for reducing or decreasing to zero a force that is or would otherwise be transmitted by a vibrating portion of the resonator to a bearing part (Pf). To this end, the vibrating portion comprises two extensions (P1, P2) that are each meander shaped so that two segments of each extension have respective speed components that are oriented in inverse directions. Such a resonator, which is balanced, may advantageously be used within a gyrometer or a force sensor.
G01C 19/5607 - Dispositifs sensibles à la rotation utilisant des masses vibrantes, p.ex. capteurs vibratoires de vitesse angulaire basés sur les forces de Coriolis utilisant des diapasons vibrants
G01L 1/16 - Mesure des forces ou des contraintes, en général en utilisant les propriétés des dispositifs piézo-électriques
H03H 3/02 - Appareils ou procédés spécialement adaptés à la fabrication de réseaux d'impédance, de circuits résonnants, de résonateurs pour la fabrication de résonateurs ou de réseaux électromécaniques pour la fabrication de résonateurs ou de réseaux piézo-électriques ou électrostrictifs
H03H 9/02 - Réseaux comprenant des éléments électromécaniques ou électro-acoustiques; Résonateurs électromécaniques - Détails
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Le Traon, Olivier
Levy, Raphael
Guerard, Jean
Perrier, Thomas
Abrégé
An inertial angular sensor comprises at least three identical resonators (R1-R3) which are arranged symmetrically around a sensing axis (A-A) of the sensor, such that a gyroscope that is formed on the basis of said sensor possesses an integrating operation. The sensor further comprises a coupling element (Ec) which links a vibrating portion of each resonator to the vibrating portions of all of the other resonators of the sensor. Preferred configurations for the inertial angular sensor make it possible to obtain integrating gyroscopes with high sensitivity at low production cost.
G01C 19/5733 - Dispositifs sensibles à la rotation utilisant des masses vibrantes, p.ex. capteurs vibratoires de vitesse angulaire basés sur les forces de Coriolis utilisant des masses planaires vibrantes entraînées dans une vibration de translation le long d’un axe - Details de structure ou topologie
36.
Particle filtering method and navigation system using measurement correlation
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Merlinge, Nicolas
Audebert, Clément
Dahia, Karim
Herisse, Bruno
Allard, Jean-Michel
Abrégé
A method for box regularized particle filtering, used to predict a state of a system, is modified such that it can be implemented in a parallel manner. The modification concerns a step of redistributing state intervals and in particular a determination of a number of sub-intervals intended to replace each state interval. The method is particularly suitable for being implemented in a navigation system with measurement correlation, for example an aircraft navigation system using ground-correlation, and for being executed by a field-programmable or fixed-gate array circuit.
G01C 21/16 - Navigation; Instruments de navigation non prévus dans les groupes en utilisant des mesures de la vitesse ou de l'accélération exécutées à bord de l'objet navigant; Navigation à l'estime en intégrant l'accélération ou la vitesse, c. à d. navigation par inertie
G07C 5/08 - Enregistrement ou indication de données de marche autres que le temps de circulation, de fonctionnement, d'arrêt ou d'attente, avec ou sans enregistrement des temps de circulation, de fonctionnement, d'arrêt ou d'attente
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
TOTALENERGIES SE (France)
Inventeur(s)
Foucher, Pierre-Yves
Druart, Guillaume
Abrégé
A gas detector for revealing a target gas includes an image capturing unit with multiple optical channels, an image processing unit and a calculation unit. The image processing unit is adapted for deducing a value of a radiation transmission coefficient which relates to an analysis spectral band, and which is attributable to a quantity of the target gas present in a part of the field-of-view. Preferably multiple analysis bands are used in parallel. The calculation unit is adapted for deducing an evaluation of the quantity of the target gas based on the value of the radiation transmission coefficient which relates to each analysis band. Such a gas detector may have small dimensions, be easily transportable, including on board a drone, and can provide evaluation results for the quantity of the target gas in real-time or nearly real-time.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G01J 5/00 - Pyrométrie des radiations, p.ex. thermométrie infrarouge ou optique
G01M 3/04 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par détection de la présence du fluide à l'emplacement de la fuite
G01M 3/38 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation de la lumière
G01N 21/3504 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse des gaz, p.ex. analyse de mélanges de gaz
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Lombard, Laurent
Durecu, Anne
Cezard, Nicolas
Gustave, François
Canat, Guillaume
Abrégé
A LIDAR system is adapted for performing differential absorption measurements of a chemical compound between two distinct optical frequencies (ν1, ν2), and for measuring a separation distance from an obstacle which is present in a background of a measurement zone where the absorption occurs. An emission optical power value is varied between different time intervals during a radiation emission sequence, in order to allow that the LIDAR system implements an optical fiber technology while having sufficient emission power. The LIDAR system makes it possible to evaluate an amount of the chemical compound which is contained in the measurement zone, as well as a separation distance from an obstacle which is located in the background of the measurement zone.
G01N 21/31 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique
G01S 7/481 - Caractéristiques de structure, p.ex. agencements d'éléments optiques
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
39.
SYSTEME LIDAR POUR DES MESURES D'ABSORPTION DIFFENTIELLE ET DE DISTANCE D'ARRIERE-PLAN
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Lombard, Laurent
Durecu, Anne
Cezard, Nicolas
Gustave, Francois
Canat, Guillaume
Abrégé
Un système LIDAR est adapté pour effectuer des mesures d'absorption différentielle d'un compose chimique entre deux fréquences optiques (v1, v2) distinctes, et mesurer une distance d'éloignement d'un obstacle qui est present en arrière- plan d'une zone de mesure ()Ca se produit l'absorption. Une valeur de puissance optique d'émission est variée entre des intervalles de temps différents au cours d'une sequence d'émission de rayonnement, afin de permettre une realisation du système LIDAR par une technologie de fibres optiques, tout en ayant une puissance d'émission suffisante. Le système LIDAR permet d'évaluer une quantité du compose chimique qui est contenue dans la zone de mesure, ainsi qu'une distance d'éloignement d'un obstacle qui est situé en arrière-plan de ladite zone de mesure. Figure d'abrégé : Figure la
G01S 17/88 - Systèmes lidar, spécialement adaptés pour des applications spécifiques
G01S 7/499 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe utilisant des effets de polarisation
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
40.
FAIRING ELEMENT FOR SURROUNDING AN OBSTACLE IN A FLUID FLOW
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Barrier, Raphael
Abrégé
A fairing element (33) is intended to be placed in a fluid flow passage (F), to surround an obstacle (31) which crosses the passage so that the fairing element guides the flow of the fluid on two opposite sides of the obstacle. The fairing element is designed such that the pressure of the flowing fluid is constant or approximately constant in an upstream part (SEu) of the exterior surface (SE) of the fairing element. A fairing element of this kind can be incorporated into a stator (20) of a turbomachine, in particular of an aeronautical turbomachine.
F01D 9/04 - Injecteurs; Logement des injecteurs; Aubes de stator; Tuyères de guidage formant une couronne ou un secteur
F01D 25/16 - Aménagement des paliers; Support ou montage des paliers dans les stators
F02K 3/06 - Ensembles fonctionnels comportant une turbine à gaz entraînant un compresseur ou un ventilateur soufflant dans lesquels une partie du fluide énergétique passe en dehors de la turbine et de la chambre de combustion l'ensemble fonctionnel comprenant des soufflantes carénées, c. à d. des soufflantes à fort débit volumétrique sous basse pression pour augmenter la poussée, p.ex. du type à double flux comprenant une soufflante avant
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Druart, Guillaume
De La Barriere, Florence
Abrégé
Disclosed is an instrument including a multipath, monolithic optical component, made up of a portion of a transparent material between two opposite faces of the component. One of the two faces of the component is formed by a first refracting surface, and the other face includes several second refracting surfaces which are juxtaposed. Each optical path of the component is formed by one of the second refracting surfaces in combination with a corresponding portion of the first refracting surface. One such component is suited for being part, within the instrument, of a detection module with multiple optical paths arranged in parallel, with a matrix photodetector shared by the optical paths. Such a detection module may be compact enough in order to be integrated into a cryostat cold screen, improving cooling thereof, and may be combined with an objective in order to form an instrument with multiple optical paths.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Martel, Cédric
Massiot, Jérôme
Pascal, Olivier
Raveu, Nathalie
Abrégé
An antenna (100) for emitting radiation from at least one electromagnetic traveling wave which propagates along a guide path is designed to reduce reflection of the traveling wave likely to occur at the end of the guide path. To this purpose, the guide path has at least one portion in the form of a spiral segment (11, 12), which is connected to another portion of the guide path in the form of a loop (13). Gain in the antenna's reflection coefficient can be obtained in this manner, which is effective in particular near a lower frequency limit of a transmission band of the antenna.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Gea Aguilera, Fernando
Barrier, Raphaël
Gruber, Mathieu Simon Paul
Polacsek, Cyril
Posson, Hélène Dominique Jeanne
Abrégé
A profiled structure for an aircraft or turbomachine is elongated in a direction in which the structure has a length exposed to an airflow and includes serrations defined by successive teeth and depressions. The serrations may be transverse to a leading edge and/or a trailing edge of the profiled structure and in the direction of elongation. Along the profiled leading edge and/or profiled trailing edge, the successive teeth and depressions may extend only over a part of the length exposed to the flow. The amplitude and/or spacing of the teeth may vary monotonically except for the few teeth nearest each end of the part, with a remaining part of the length being smooth.
B64C 21/10 - Moyens permettant d'influencer l'écoulement d'air sur les surfaces des aéronefs en agissant sur la couche limite par utilisation d'autres caractéristiques de la surface, p.ex. la rugosité
44.
Spectral filter comprising at least two coupled Fabry-Perot structures
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Fix, Baptiste
Jaeck, Julien
Bouchon, Patrick
Haidar, Riad
Abrégé
Disclosed is a spectral filter including a plurality of Fabry-Perot structures which are collectively carried by a support, and coupled together so as to produce a coupling resonance that is distinct from individual resonances of each of the Fabry-Perot structures. The coupling resonance may have a higher quality factor than the quality factors of the individual resonances. Each Fabry-Perot structure includes two portions of metal surfaces which are parallel to a face of the substrate, so that electromagnetic radiation wave components propagating within each Fabry-Perot structure, and which contribute to the coupling resonance, have a direction of propagation that is parallel to the face of the substrate.
G01J 3/26 - Production du spectre; Monochromateurs en utilisant une réflexion multiple, p.ex. interféromètre de Fabry-Perot, filtre à interférences variables
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Michel, David Tomline
Mugnier, Laurent
Valla, Matthieu
Abrégé
Disclosed are a method and a system (10) for detection and telemetry by electromagnetic radiation pulses, which can be used to characterise a radial velocity distribution (vr) as a function of a separation distance (de) within an exploration zone (ZE). A pulse response of the system is used to decompose a measurement signal (SM) that is collected at each acquisition sequence performed for a useful measurement. The result of the decomposition comprises an estimation of the radial velocity distribution as a function of the separation distance.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Levy, Raphael
Perrier, Thomas
Lavenus, Pierre
Guerard, Jean
Gaudineau, Vincent
Abrégé
An electric field detector (20) comprises an electromechanical oscillator, part of which is formed by a piezoelectric element (1), a frequency measurement device (4) which is coupled to the oscillator so as to measure the oscillating frequency, and an electrical masking assembly (5). The electrical masking assembly is arranged close to the piezoelectric element (1) such that, when using the detector, the piezoelectric element moves by vibrating in relation to the electrical masking assembly. A variable part of the piezoelectric element is thus exposed to the electric field to be measured. A modification of the oscillating frequency (f) then forms an electric field measurement result.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Haïdar, Riad
Maine, Sylvain
Vincent, Gregory
Primot, Jérôme
Lachaud, Hervé
Abrégé
A filtering vision element forming a windshield or rearview mirror of a road vehicle includes a lower region and an upper region. The filtering vision element is designed so that a difference in attenuation between two linear polarizations of an incident radiation has values that are of opposite signs in the lower and upper regions. The two linear polarizations may respectively be horizontal and contained in a vertical plane. Blinding of the driver caused by a spot of reflected light produced on a road by headlights of an external vehicle may thus be decreased or prevented.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Rame, Jérémy
Jaquet, Virginie
Delautre, Joël
Guedou, Jean-Yves
Caron, Pierre
Lavigne, Odile
Locq, Didier
Perrut, Mikael
Abrégé
A nickel-based superalloy comprises, in percentages by mass, 4.0 to 5.5% rhenium, 1.0 to 3.0 ruthenium, 2.0 to 14.0% cobalt, 0.3 to 1.0% molybdenum, 3.0 to 5.0% chromium, 2.5 to 4.0% tungsten, 4.5 to 6.5% aluminum, 0.50 to 1.50% titanium, 8.0 to 9.0% tantalum, 0.15 to 0.30% hafnium, 0.05 to 0.15% silicon, the balance being nickel and unavoidable impurities. A single-crystal blade comprises such an alloy and a turbomachine comprising such a blade.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Chabrier, Christian
Meimon, Serge
Gayot, Patrice
Petit, Cyril
Baracal De Mece, Pedro
Wassmer, Benjamin
Abrégé
The invention relates to a system for laser photocoagulation of the retina, comprising: a photocoagulation laser (1); an optical path (5) connecting the upstream photocoagulation laser (1) to a downstream laser outlet opening (6) intended to be positioned in front of the retina; an adaptive optical element (9) positioned in the optical path and configured to modify the wavefront of the laser beam being propagated in the optical path, in order to compensate for aberrations of the eye that occur as far as the retina; a position control loop (10) controlling a first actuator (14) positioned in the optical path downstream of the adaptive optical element in order to control the position of the laser outlet opening relative to the retina to be treated; and at least one imaging device (8) configured to obtain an image of the retina diverted from the optical path.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Michel, David Tomline
Gustave, Francois
Abrégé
A method for calibrating a LIDAR system (10) proposes incorporating an reference optical path, which is formed from an optical fibre (20), in this LIDAR system. The length of the optical fibre determines a measurement reference value, which can then be used to evaluate distances away from targets to be characterised using the LIDAR system. The calibration method is simple and economic to implement. It can be used, in particular, for a LIDAR system which is designed to carry out air speed measurements, in particular on board an aircraft.
G01S 17/34 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées utilisant la transmission d'ondes continues modulées en fréquence, tout en faisant un hétérodynage du signal reçu, ou d’un signal dérivé, avec un signal généré localement, associé au signal transmis simultanément
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Krapez, Jean-Claude
Abrégé
A method for capturing images makes it possible to at least partially correct a memory effect of sensitive elements (1) of a matrix (10a) used to capture the images. A corrected image is formed by subtracting from the new raw image, a part of a prior raw image that was captured before the new raw image. The method is particularly suitable for sensitive elements with a first-order transfer function in relation to time, such as bolometers or microbolometers. The correction of the memory effect makes it possible to improve the transfer function and/or reduce a blurring effect that is present in the images when elements of the scene move.
G06T 5/50 - Amélioration ou restauration d'image en utilisant plusieurs images, p.ex. moyenne, soustraction
G01J 5/70 - Compensation passive des mesures du pyromètre, p.ex. par utilisation de mesures de la température ambiante ou de la température interne du boîtier
52.
Sintered metal material having directional porosity and comprising at least one ferromagnetic part, and production method thereof
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Lambert, Oceané
Davoine, Cécile
Abrégé
The invention relates to a sintered metal material comprising at least one magnetic part, characterised by directional through-pores having a size of between 1 and 100 μm, said material having a density varying by less than 20% from one sample of 1 cm3 to another taken from a one-piece part made from the material.
B22F 3/11 - Fabrication de pièces ou d'objets poreux
B22F 3/22 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittage; Appareils spécialement adaptés à cet effet pour la fabrication de pièces par coulée en moule poreux ou absorbant, c. à d. par coulée d'une suspension de poudre métallique dans un moule poreux, d'une façon analogue au coulage de la barbotine
B22F 7/00 - Fabrication de couches composites, de pièces ou d'objets à base de poudres métalliques, par frittage avec ou sans compactage
53.
Self-adapting gas turbine firebox with variable geometry
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Guin, Christian
Paun, Florin
Abrégé
A self-adapting gas turbine firebox with variable geometry includes at least one system with variable opening for automatically adjusting a combustion configuration inside a combustion chamber according to an air temperature, particularly of air from a compressor. The adjustment is performed by a thermosensitive member that controls at least one cross-sectional area of a passage to the combustion chamber, for air which participates in the combustion of fuel or participates in a dilution of gases effective inside the combustion chamber.
F02C 3/06 - Ensembles fonctionnels de turbines à gaz caractérisés par l'utilisation de produits de combustion comme fluide de travail ayant une turbine entraînant un compresseur le compresseur ne comprenant que des étages axiaux
F23R 3/06 - Disposition des ouvertures le long du tube à flamme
F02C 9/20 - Commande du débit du fluide de travail par réglage des aubes
F23N 5/04 - Systèmes de commande de la combustion utilisant des dispositifs sensibles aux variations thermiques ou à la dilatation thermique d'un agent utilisant des éléments bimétalliques
F23R 3/14 - Aménagements de l'entrée d'air pour l'air primaire créant un tourbillon au moyen d'ailettes de tourbillonnement
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
CENTRE NATIONAL D'ETUDES SPATIALES C N E S (France)
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS (France)
UNIVERSITE TOULOUSE III - PAUL SABATIER (France)
Inventeur(s)
Prost, Daniel
Romier, Maxime
Belot, Daniel
Simon, Patrice
Brousse, Kevin
Taberna, Pierre-Louis
Abrégé
A device (10) is suitable for revealing spatial variations in the polarisation of electromagnetic radiation, in the form of localised temperature variations. The device comprises a surface of a carrier (1) that is electrically and thermally insulating, and comprises an array of patterns (M) that each consist of at least one rectilinear segment (2) of a sensitive material, the orientation of which is variable inside each pattern or between neighbouring patterns. Such a device may be used, with a thermal camera, to reveal, in infrared images, temperature variations that are localized to segments that are not perpendicular to a local direction of linear polarisation of the radiation.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
AIRBUS OPERATIONS (S.A.S.) (France)
Inventeur(s)
Martel, Cédric
Abrégé
A multi-band antenna (100) including a metal base plate (10) forming an electrical ground plane, and a plurality of metal patches (1 to 3) superimposed on top of the metal base plate. The metal patches are connected in parallel between a signal lead wire (11A) and the metal base plate. The metal patches have respective surface areas which increase with the distance of each metal patch from the metal base plate. The antenna provides as many different resonant frequency values as there are patches.
H01Q 5/15 - Antennes résonnantes pour faire fonctionner des antennes à alimentation centrale qui comprennent un ou plusieurs éléments actifs rectilignes colinéaires
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Michel, David Tomline
Augere, Beatrice
Valla, Matthieu
Abrégé
A lidar system is suitable for performing anemometric measurements relative to a focal region (ZF) of a laser beam (F) that is emitted by the system. The system comprises a device (40) for achieving temporal control of the laser beam, which is suitable for causing said laser beam to take the form of successive laser pulses, so that each laser pulse has an individual duration that is longer than or equal to twice the Rayleigh length (RL) divided by the velocity of propagation of the laser pulses through the atmosphere, and shorter than 20 µs. Advantageously, the individual duration of each laser pulse is comprised between 0.2 and 5 times a coherence time of the atmosphere in the focal region. Such a lidar system procures values for a spectral CNR ratio that are superior to those of prior-art systems of equivalent spatial resolution.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Haddad, Zehira
Herbin, Stéphane
Chan-Hon-Tong, Adrien
Abrégé
Disclosed is a method for detecting cells having at least one anomaly in a cytological sample on the basis of at least one first digitised digitised-electron-microscopy image of the sample.
G01N 21/29 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en utilisant la détection visuelle
G01N 15/14 - Recherche par des moyens électro-optiques
G01N 21/25 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes
G01N 15/10 - Recherche de particules individuelles
58.
Device for imaging and delivering spectroscopic information
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Primot, Jérôme
Suffis, Sabine
Thetas, Sophie
Bellanger, Cindy
Kattnig, Alain
Haïdar, Riad
Jaeck, Julien
Bouchon, Patrick
Boher, Micke
Abrégé
A device for imaging and delivering spectroscopic information comprises an objective (1), an image sensor (2) and an optical component (3) having a spectral differentiation function. The optical component having a spectral differentiation function modifies the image of a point in different ways for at least two colours, so that a form of the image of the point delivers spectroscopic information that appears directly in the image as captured by the image sensor. Such device may be used in a detection and/or surveillance system, which then possesses a lower probability of false alarm value.
G01J 3/02 - Spectrométrie; Spectrophotométrie; Monochromateurs; Mesure de la couleur - Parties constitutives
G01J 3/50 - Mesure de couleur; Dispositifs de mesure de couleur, p.ex. colorimètres en utilisant des détecteurs électriques de radiations
G02B 13/06 - Objectifs panoramiques; Lentilles dites "de ciel"
G02B 26/06 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander la phase de la lumière
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
ETAT FRANÇAIS REPRÉSENTÉ PAR LE DÉLÉGUÉ GÉNÉRAL DE L'ARMEMENT (France)
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (ONERA) (France)
Inventeur(s)
Binet, Laurent
Pezet, Stéphane
Prunel, Marc
Abrégé
The aim of the invention is a device for detecting the approach of a vortex ring state for a rotary-wing aerodyne (10), said detection device comprising a set of vibration sensors (16a, 16b, 16c) configured to be distributed in or over the aerodyne (10), and a data processing unit (20) configured for the real-time reception of measurement data originating from the sensors, for processing these data for real-time computation of the vibration spectrum of the aerodyne (10), for real-time detection or non-detection, through vibration analysis, of the approach of a vortex ring state as a function of the computed vibration spectrum, and for the transmission of an alarm in the event of the detection of the approach of a vortex ring state.
OFFICE NATIONAL D'ÉTUDES ET DE RECHERCHES AÉROSPATIALES (France)
ARCYS (France)
Inventeur(s)
Ceolato, Romain
Riviere, Nicolas
Abrégé
An optical device for the contactless measurement of a liquid level contained in a storage device by an optical signal, the optical device including an optical unit fixedly positioned above the storage device and an electronic control unit capable of emitting an optical signal, dissociated from the optical unit and positioned at a distance from the optical unit. The optical unit includes a single channel for the emission and the reception of the optical signal. The optical unit is connected to the electronic control unit through an optical fibre capable of transmitting the optical signal emitted by the electronic control unit and an optical signal reflected by the liquid. The optical fibre has first and second optical cores that juxtapose each other such that at least a part of the optical signal emitted in the first optical core of the optical fibre is backscattered in the second optical core.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Baracal De Mece, Pedro
Meimon, Serge
Petit, Cyril
Pureur, David
Wassmer, Benjamin
Abrégé
The invention relates to a method for ophthalmic imaging of a part of an eye to be imaged, comprising the steps of: - illuminating the part of the eye (3) to be imaged, and - acquiring, using an imager (2), a series of images corresponding to a plurality of different object focal planes (20) distributed along an object axis (Z), the acquisition comprising: - modifying a parameter for the variation of the second branch (17) of the optical system (14) between each image acquired, - applying high-pass filtering to each of the images in the series of images, - determining at least one metric value representing the energy in an area of interest in each filtered image, - combining metric values for different filtered images associated with axial coordinates representing the distribution of the object focal planes along the object axis, and - producing a tomographic image. The invention also relates to an ophthalmic imaging system and a retinal laser photocoagulation system.
A61B 3/12 - Appareils pour l'examen optique des yeux; Appareils pour l'examen clinique des yeux du type à mesure objective, c. à d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient pour examiner le fond de l'œil, p.ex. ophtalmoscopes
A61B 3/10 - Appareils pour l'examen optique des yeux; Appareils pour l'examen clinique des yeux du type à mesure objective, c. à d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
TOTALENERGIES ONETECH (France)
Inventeur(s)
Foucher, Pierre-Yves
Druart, Guillaume
Abrégé
The invention relates to a gas sensor for revealing a target gas, which comprises an image-acquisition unit (10) with a plurality of optical channels (10a, 10b, ...), an image-processing unit (20) and a computing unit (30). The image-processing unit is suitable for deducing a value of a radiation transmission coefficient which is relative to an analysis spectral band, and which can be attributed to a quantity of the target gas present in a part of the input optical field. Preferably, several analysis bands are used in parallel. The computing unit is suitable for deducing an evaluation of the quantity of the target gas from the value of the radiation transmission coefficient relative to each analysis band. Such a gas sensor can be compact, easily transportable, even on board a drone, and can provide results of the evaluation of the quantity of the target gas in real time or near real time.
G01N 21/3504 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse des gaz, p.ex. analyse de mélanges de gaz
G01M 3/38 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation de la lumière
63.
Sensitive component for device for measuring electromagnetic field by thermofluorescence, corresponding measurement and manufacturing methods
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Bobo, Jean-Francois
Carrey, Julian
Faure, Stephane
Isaac, Francois
Prost, Daniel
Abrégé
A component sensitive to an electromagnetic field, which includes a first absorbent material, able to partially absorb energy of a given electromagnetic field and converting the absorbed energy into heat. The sensitive component includes a second fluorescent and thermosensitive material, placed in contact with the first material in order to store the heat converted by the first material. The second material is able to re-emit, under the action of a predetermined excitation light, a light by fluorescence with light intensity dependent on the stored heat.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Rame, Jérémy
Jaquet, Virginie
Delautre, Joël
Guedou, Jean-Yves
Caron, Pierre
Lavigne, Odile
Locq, Didier
Perrut, Mikael
Abrégé
A nickel-based superalloy comprises, in percentages by mass, 4.0 to 5.5% rhenium, 3.5 to 12.5% cobalt, 0.30 to 1.50% molybdenum, 3.5 to 5.5% chromium, 3.5 to 5.5% tungsten, 4.5 to 6.0% aluminum, 0.35 to 1.50% titanium, 8.0 to 10.5% tantalum, 0.15 to 0.30% hafnium, 0.05 to 0.15% silicon, the balance being nickel and unavoidable impurities. A single-crystal blade comprises such an alloy and a turbomachine comprising such a blade.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Druart, Guillaume
De La Barriere, Florence
Abrégé
An instrument comprises a monolithic optical component with a plurality of channels (1), which consists of a portion of a transparent material between two opposite faces of said component. One of the two faces consists of a first dioptric surface (S1) and the other face comprises a plurality of second dioptric surfaces (S2) which are juxtaposed. Each optical channel of the component is formed by one of the second dioptric surfaces in combination with a corresponding portion of the first dioptric surface. Such a component is suitable for forming part, within the instrument, of a detection module with a plurality of optical channels which are arranged in parallel, with a matrix-array photodetector which is common to the optical channels. Such a detection module may be sufficiently compact for integration within a cryostat cold screen, facilitating the cooling thereof, and may be combined with an objective to form an instrument with a plurality of optical channels.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Gea Aguilera, Fernando
Barrier, Raphaël
Gruber, Mathieu Simon Paul
Polacsek, Cyril
Posson, Hélène Dominique Jeanne
Abrégé
The invention relates to a profiled structure elongated in a direction in which the structure has a length exposed to an airflow and transversely to which the structure has a leading edge and/or a trailing edge, at least one of which is profiled and has, along said direction of elongation, geometric serration patterns defined by a succession of peaks and troughs. Along the profiled leading edge and/or trailing edge, the serration patterns have a geometric pattern that is repeated in the direction of elongation, the shape of which is stretched and/or contracted transversely to the direction of elongation and/or in the direction of elongation.
B64C 21/10 - Moyens permettant d'influencer l'écoulement d'air sur les surfaces des aéronefs en agissant sur la couche limite par utilisation d'autres caractéristiques de la surface, p.ex. la rugosité
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Cattenoz, Mathieu
Brouard, Philippe
Abrégé
Un déphasage d'émission (.PHI.02, .PHI.03) peut ate déterminé, tel qu'il existe entre au moins deux voies d'émission (10 1, 10 2, 10 3) d'un radar. Pour cela, des composantes d'un signal de retour du radar, correspondant une-a-une aux radiations d'émission (R1) qui sont produites séparément par les deux voies d'émission, sont identifiées par des modulations différentes. II est alors possible de compenser chaque déphasage d'émission, pour mieux contrôler la direction d'émission-réception du radar ainsi que la forme de faisceau. L'invention est applicable notamment aux radars de type MIMO.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Simon, Frank
Abrégé
A surface liner member includes an external wall which is provided with multiple holes, a spacer structure, and tubes which are respectively associated with the holes in the external wall. The surface liner member is intended to be applied to a base surface in order to reduce, by acoustic absorption, an acoustic wave reflected on this base surface. The acoustic absorption efficiency is improved, particularly for frequencies below 500 Hz, by varying the shape of the holes in the external wall such that the ratio of the hole perimeter to the hole area varies. Such a surface liner member may be adapted to form a surface portion of an aircraft engine nacelle, or of a leading edge of an aircraft wing.
G10K 11/172 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets de résonance
69.
PROFILED STRUCTURE FOR AN AIRCRAFT OR TURBOMACHINE
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Gea Aguilera, Fernando
Barrier, Raphael
Gruber, Mathieu Simon Paul
Polacsek, Cyril
Posson, Helene Dominique Jeanne
Abrégé
The invention relates to a profiled structure which is elongated in a direction in which the structure has a length exposed to an air flow, and transversely to which the structure has a leading edge (164) and/or a trailing edge, at least one of which is profiled and has, in the direction of elongation, clamps (28a) defined by successive teeth (30) and recesses (32). Along the profiled leading edge and/or trailing edge, the successive teeth (30) and recesses (32) extend over only a portion of the length exposed to the flow, over which portion the amplitude and/or spacing of the teeth varies monotonously with the exception of the few teeth closest to each end of said portion, a remaining portion (280) of said length being smooth.
Office National d'Etudes et de Recherches Aérospatiales-ONERA (France)
Inventeur(s)
Bouchon, Patrick
Jaeck, Julien
Makhsiyan, Mathilde
Haïdar, Riad
Abrégé
According to a first aspect, the present description relates to a device for optically encoding an image, which device is intended to be observed in at least one first spectral band of observation. The encoding device comprises a supporting structure and a set of metal-dielectric-metal plasmonic antennae formed on said supporting structure, each plasmonic antenna being resonant at at least one wavelength comprised in said first spectral band of observation, the plasmonic antennae being arranged spatially on the supporting structure in such a way as to form at least one first spatial encoding of said image in said first spectral band of observation.
G06K 19/06 - Supports d'enregistrement pour utilisation avec des machines et avec au moins une partie prévue pour supporter des marques numériques caractérisés par le genre de marque numérique, p.ex. forme, nature, code
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
Inventeur(s)
Bierret, Antoine
Vincent, Grégory
Haidar, Riad
Pardo, Fabrice
Pelouard, Jean-Luc
Abrégé
A device for multispectral imaging in the infrared, suitable for detecting at at least one first and one second detection wavelength is provided. It comprises a detection matrix array comprising a set of elementary detectors of preset dimensions forming an image field of given dimensions; and an image-forming optic having a given aperture number (N) and a given focal length (F), which aperture number and focal length are suitable for forming, at any point of the image field, an elementary focal spot covering a set of at least two juxtaposed elementary detectors. The device furthermore comprises a matrix array of elementary metal-dielectric guided-resonance filters, which matrix array is arranged in front of the detection matrix array at a distance smaller than a focal depth of the optic, the dimensions of the elementary filters being such that each elementary focal spot formed at each point of the image field covers at least two elementary filters; and the elementary filters are optimised for pass-band transmission in spectral bands centred on two different central wavelengths, equal to two of said detection wavelengths.
G01J 3/36 - Mesure de l'intensité des raies spectrales directement sur le spectre lui-même Étude de plusieurs bandes d’un spectre à l’aide de détecteurs distincts
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Levy, Raphael
Aoust, Guillaume
Verlhac, Béatrice
Guerard, Jean
Le Traon, Olivier
Gaudineau, Vincent
Abrégé
An electric measurement circuit possesses an electrical reaction leg for forming an oscillator from a resonator, and furthermore possesses a measurement leg the input of which is supplied by the electrical reaction leg. The measurement leg contains an adjustable phase shifter so that an additional excitation force that is applied to the resonator in the measurement leg can be adjusted in phase quadrature with respect to an excitation force that is applied to the resonator in the electrical reaction leg. Such an electrical measurement circuit is particularly suitable for forming a photoacoustic gas detector.
G01N 29/34 - Génération des ondes ultrasonores, sonores ou infrasonores
73.
LIDAR for heterodyne detection by a local oscillator and a dual probing beam, at one or several simultaneous frequency(ies), and LIDAR detection method by dual heterodyning detection
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
CENTRE NATIONAL D'ETUDES SPATIALES (France)
Inventeur(s)
Hebert, Philippe
Lemaitre, Francois
Cezard, Nicolas
Abrégé
A LIDAR-type device for a remote spectroscopy of a matter includes an optical emission channel that includes a laser source and an optical waves frequency generator to generate a first comb, a second comb, and a local comb. Each comb includes at least one stripe. A transmit telescope emits an emission signal. A reception channel includes a receive telescope that receives a signal reflected by the matter traversed by the emission signal and a detection system that detects a first beat signal of the at least one stripe of the local comb with the corresponding first stripe of the first reflected comb, a second beat signal of the at least one stripe of the local comb with the corresponding second stripe of the second reflected comb, and a third beat signal of the at least one first beat signal with the at least one second beat signal.
G01S 17/34 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées utilisant la transmission d'ondes continues modulées en fréquence, tout en faisant un hétérodynage du signal reçu, ou d’un signal dérivé, avec un signal généré localement, associé au signal transmis simultanément
G01J 3/02 - Spectrométrie; Spectrophotométrie; Monochromateurs; Mesure de la couleur - Parties constitutives
G02B 23/24 - Instruments pour regarder l'intérieur de corps creux, p.ex. endoscopes à fibres
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Elias, Paul-Quentin
Abrégé
Disclosed is a device for measurement of a flow speed of a gas comprises a probe, a voltage supply source and a pulse-counting detection circuit. The probe comprises an axial electrode whose exposed end has a small radius of curvature, and a peripheral electrode. The supply source applies an alternating voltage between both electrodes, and electrical discharges which are produced through the gas between the two electrodes are detected and counted by the detection circuit. Such a speed measurement device is particularly reliable, and suited for use on board an aircraft for measuring the speed thereof relative to the surrounding air.
G01F 1/56 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets électriques ou magnétiques
G01P 5/08 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides en mesurant la variation d'une variable électrique directement affectée par l'écoulement, p.ex. en utilisant un effet dynamo-électrique
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Chabrier, Christian
Meimon, Serge
Gayot, Patrice
Petit, Cyril
Baracal De Mece, Pedro
Wassmer, Benjamin
Abrégé
The invention relates to a system for laser photocoagulation of the retina, comprising: a photocoagulation laser (1); an optical path (5) connecting the upstream photocoagulation laser (1) to a downstream laser outlet opening (6) intended to be positioned in front of the retina; an adaptive optical element (9) positioned in the optical path and configured to modify the wavefront of the laser beam being propagated in the optical path, in order to compensate for aberrations of the eye that occur as far as the retina; a position control loop (10) controlling a first actuator (14) positioned in the optical path downstream of the adaptive optical element in order to control the position of the laser outlet opening relative to the retina to be treated; and at least one imaging device (8) configured to obtain an image of the retina diverted from the optical path.
Office National D'Etudes et de Recherches Aerospatiales (France)
Safran Helicopter Engines (France)
Inventeur(s)
Rame, Jérémy
Belaygue, Philippe
Caron, Pierre
Delautre, Joël
Jaquet, Virginie
Lavigne, Odile
Abrégé
A nickel-based superalloy comprises in mass percent: 4.0% to 6.0% chromium; 0.4% to 0.8% molybdenum; 2.5% to 3.5% rhenium; 6.2% to 6.6% tungsten; 5.2% to 5.7% aluminum; 0.0 to 1.6% titanium; 6.0% to 9.9% tantalum; 0.0 to 0.7% hafnium; and 0.0 to 0.3% silicon; the balance being constituted by nickel and any impurities.
A monocrystalline blade comprises such an alloy and a turbomachine including such a blade.
B21D 39/00 - Utilisation de procédés permettant d'assembler des objets ou des parties d'objets, p.ex. revêtement par des tôles, autrement que par placage; Dispositifs de mandrinage des tubes
C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Guerard, Jean
Verlhac, Béatrice
Lavenus, Pierre
Levy, Raphaël
Abrégé
Disclosed is a system and method that provide an amplitude value and a phase delay value which relate to a sinusoidal signal to be measured. For this purpose, phase values of a reference signal, at which the signal to be measured exceeds or falls below the reference signal, are collected and transmitted to a computation unit. The computation unit determines the amplitude and delay values from the collected phase values. The system can be implemented in a cost-effective manner, in particular using an ASIC circuit or an FPGA circuit.
G01R 25/00 - Dispositions pour procéder aux mesures de l'angle de phase entre une tension et un courant ou entre des tensions ou des courants
G01P 15/097 - Mesure de l'accélération; Mesure de la décélération; Mesure des chocs, c. à d. d'une variation brusque de l'accélération en ayant recours aux forces d'inertie avec conversion en valeurs électriques ou magnétiques au moyen d'éléments vibrants
G01C 19/5776 - Traitement de signal non spécifique à l'un des dispositifs couverts par les groupes
G01R 19/04 - Mesure des valeurs de pointe d'un courant alternatif ou des impulsions
G01R 19/175 - Indications des instants de passage du courant ou de la tension par une valeur déterminée, p.ex. de passage par zéro
G06F 17/12 - Opérations mathématiques complexes pour la résolution d'équations d'équations simultanées
G01P 15/18 - Mesure de l'accélération; Mesure de la décélération; Mesure des chocs, c. à d. d'une variation brusque de l'accélération dans plusieurs dimensions
78.
METHOD FOR DETECTING CELLS HAVING AT LEAST ONE ANOMALY IN A CYTOLOGICAL SAMPLE
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Haddad, Zehira
Herbin, Stephane
Chan-Hon-Tong, Adrien
Abrégé
A method for detecting cells having at least one anomaly in a cytological sample on the basis of at least one first digitised digitised-electron-microscopy image (1) of the sample.
G01N 15/01 - spécialement adaptée aux cellules biologiques, p.ex. aux cellules sanguines (recherche de la sédimentation des suspensions de particules dans du sang G01N 15/05)
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
UNIVERSITE GRENOBLE ALPES (France)
Inventeur(s)
Guerineau, Nicolas
Le Coarer, Etienne
Ferrec, Yann
De La Barriere, Florence
Abrégé
A spectral imager, including: a photodetector including a plurality of photosensitive sites exposed on a photosensitive surface; a collimating lens including an intermediate focal plane; an array of interferometers including two main waves, each including a cavity defined by two faces; an array of microlenses arranged in a plane parallel to the photosensitive surface, each microlens paired with an interferometer to form an optical pair, including an image focal plane coinciding with the photosensitive surface and facing a section of the photosensitive surface.
G01J 3/02 - Spectrométrie; Spectrophotométrie; Monochromateurs; Mesure de la couleur - Parties constitutives
G01J 3/26 - Production du spectre; Monochromateurs en utilisant une réflexion multiple, p.ex. interféromètre de Fabry-Perot, filtre à interférences variables
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Aoust, Guillaume
Bourgeteau, Béatrice
Levy, Raphaël
Le Traon, Olivier
Janiaud, Denis
Abrégé
A resonator includes a prong of which the width between edges is close to λ/2. The pressure variation at one edge is then in phase opposition with that at the other edge. Acoustic coupling with an incident wave having the wavelength is thus improved. The ratio between the width between edges and the height of the prong is chosen so that only the fundamental mode with bending oscillation of the prong is present. It to prongs of a tuning fork embedded in a solid shared base optimized to contain the energy in the tuning fork while avoiding energy losses in the support. Finally, the tuning fork is advantageously combined with a unit for containing acoustic energy including a rigid reflecting screen.
H03B 5/32 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique un résonateur piézo-électrique
H03H 9/19 - Réseaux comprenant des éléments électromécaniques ou électro-acoustiques; Résonateurs électromécaniques - Détails de réalisation de résonateurs se composant de matériau piézo-électrique ou électrostrictif ayant un résonateur unique en quartz
81.
SELF-CALIBRATING OPTICAL DEVICE FOR THE CONTACTLESS MEASUREMENT OF THE LEVEL OF A LIQUID ________________________
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
ARCYS (France)
Inventeur(s)
Ceolato, Romain
Riviere, Nicolas
Abrégé
The invention relates to a self-calibrating optical device for contactless measurement of the level of a liquid contained in a storage means. The measurement is possible using an electronic control unit capable of emitting an optical signal by an optical unit The optical unit comprises a single channel for the emission and the reception of the optical signal and is connected to the electronic control unit with an optical fibre capable of transmitting an optical signal. The optical fibre has two optical cores that juxtapose each other such that at least a part of the optical signal emitted in the first optical core of the optical fibre is backscattered in the second optical core. The optic fibre and the optical unit of the invention bring great benefits, as the self-calibrating feature and minimizing the signal-to-noise ratio.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Rame, Jeremy
Jaquet, Virginie
Delautre, Joel
Guedou, Jean-Yves
Caron, Pierre
Lavigne, Odile
Locq, Didier
Perrut, Mikael
Abrégé
The invention relates to a nickel-based superalloy comprising, in weight percentages, 4.0 to 5.5 % rhenium, 3.5 to 12.5 % cobalt, 0.30 to 1.50 % molybdenum, 3.5 to 5.5 % chromium, 3.5 to 5.5 % tungsten, 4.5 to 6.0 % aluminum, 0.35 to 1.50 % titanium, 8.0 to 10.5 % de tantalum, 0.15 to 0.30 % hafnium, 0.05 to 0.15 % silicon, the remainder being nickel and inevitable impurities. The invention also relates to a single-crystal blade (20A, 20B) comprising such an alloy and to a turbomachine (10) comprising such a blade (20A, 20B).
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Rame, Jeremy
Jaquet, Virginie
Delautre, Joel
Guedou, Jean-Yves
Caron, Pierre
Lavigne, Odile
Locq, Didier
Perrut, Mikael
Abrégé
The invention relates to a nickel-based superalloy comprising, in weight percentages, 4.0 to 5.5 % rhenium, 1.0 to 3.0 ruthenium, 2.0 to 14.0 % cobalt, 0.3 to 1.0 % molybdenum, 3.0 to 5.0 % chromium, 2.5 to 4.0 % tungsten, 4.5 to 6.5 % aluminium, 0.50 to 1.50 % titanium, 8.0 to 9.0 % de tantalum, 0.15 to 0.30 % hafnium, 0.05 to 0.15 % silicon, the rest being nickel and inevitable impurities. The invention also relates to a single-crystal blade (20A, 20B) comprising such an alloy and to a turbomachine (10) comprising such a blade (20A, 20B).
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
Inventeur(s)
Steveler, Emilie
Chevalier, Paul
Pelouard, Jean-Luc
Pardo, Fabrice
Bouchon, Patrick
Haidar, Riad
Verdun, Michaël
Abrégé
A photodetector includes a Helmholtz resonator and a photosensitive structure that is placed in an electric-field-concentrating interval forming part of the Helmholtz resonator. Such a photodetector is in particular suitable for imaging applications. The wavelength of the radiation to be detected is determined by dimensions of the Helmholtz resonator, within a detection spectral interval of the photosensitive structure.
G01J 3/50 - Mesure de couleur; Dispositifs de mesure de couleur, p.ex. colorimètres en utilisant des détecteurs électriques de radiations
H01L 31/0232 - Dispositifs à semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes, ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit rayonnement e; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives; Leurs détails - Détails Éléments ou dispositions optiques associés au dispositif
H01L 31/105 - Dispositifs sensibles au rayonnement infrarouge, visible ou ultraviolet caractérisés par une seule barrière de potentiel ou de surface la barrière de potentiel étant du type PIN
H01L 31/0352 - Dispositifs à semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes, ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit rayonnement e; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives; Leurs détails caractérisés par leurs corps semi-conducteurs caractérisés par leur forme ou par les formes, les dimensions relatives ou la disposition des régions semi-conductrices
G01N 21/17 - Systèmes dans lesquels la lumière incidente est modifiée suivant les propriétés du matériau examiné
G02B 27/09 - Mise en forme du faisceau, p.ex. changement de la section transversale, non prévue ailleurs
H04N 5/374 - Capteurs adressés, p.ex. capteurs MOS ou CMOS
85.
Solar panel comprising notably a structure and at least two photovoltaic cells
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Payan, Denis
Inguimbert, Virginie
Siguier, Jean-Michel
Abrégé
This solar panel includes a structure in contact with an ambient environment and at least two photovoltaic cells each defining a lateral contact face and including a base element, a grid of electric conductors and a protective element made from transparent material, the grid including at least one conductive wire extending along the lateral contact face. The two cells are arranged on the structure such that at least part of each of the lateral contact faces is arranged regarding the other part while forming a panel surface and such that the shortest path passing through the ambient environment between the opposite parts of the lateral faces of the two cells is equal to at least about 20 mm.
H01L 31/05 - Moyens d’interconnexion électrique entre les cellules PV à l’intérieur du module PV, p.ex. connexion en série de cellules PV
H02S 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
H01L 31/054 - Dispositifs à semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes, ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit rayonnement e; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives; Leurs détails adaptés comme dispositifs de conversion photovoltaïque [PV] Éléments optiques directement associés ou intégrés à la cellule PV, p.ex. moyens réflecteurs ou concentrateurs de lumière
H01L 31/042 - Modules PV ou matrices de cellules PV individuelles
H01L 31/0445 - Modules PV ou matrices de cellules PV individuelles comportant des cellules solaires en couches minces, p.ex. cellules solaires en a-Si, CIS ou CdTe
86.
SPECTRAL CONVERSION ELEMENT FOR ELECTROMAGNETIC RADIATION
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Bouchon, Patrick
Haidar, Riad
Makhsiyan, Mathilde
Abrégé
A spectral conversion element (10) for electomagnetic radiation includes Terahertz antennas (2) and infrared antennas (3) which are distributed in pixel zones (PZ). The Terahertz antennas and the infrared antennas that are in one same pixel zone are thermally coupled, and those that are in different pixel zones are uncoupled. Such an element enables the capture of images that are formed with Terahertz radiation, by using an infrared image detector (20).
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Bouchon, Patrick
Haidar, Riad
Makhsiyan, Mathilde
Abrégé
A spectral conversion element for electromagnetic radiation includes Terahertz antennas and infrared antennas which are distributed in pixel zones. The Terahertz antennas and the infrared antennas which are in one same pixel zone are thermally coupled, and those which are in different pixel zones are uncoupled. Such an element enables the capture of images which are formed with Terahertz radiation, by using an infrared image detector.
G01J 5/28 - Pyrométrie des radiations, p.ex. thermométrie infrarouge ou optique en utilisant des détecteurs électriques de radiations en utilisant des cellules photo-émissives ou photovoltaïques
G02F 2/02 - Changement de fréquence de la lumière, p.ex. par compteurs quantiques
H01Q 17/00 - Dispositifs pour absorber les ondes rayonnées par une antenne; Combinaisons de tels dispositifs avec des éléments ou systèmes d'antennes actives
H01Q 13/18 - Antennes à fentes résonnantes la fente étant adossée à, ou formée par, une paroi limite d'une cavité résonnante
Office National d'Etudes et de Recherches Aérospatiales (France)
Inventeur(s)
Hébert, Philippe
Lemaître, François
Orlik, Xavier
Dartigalongue, Thibault
Abrégé
Disclosed is a remote spectroscopy device of the LIDAR type including a module for generating an emission signal, an emission module for sending the emission signal toward a targeted material, a receiving module for receiving a response signal and a module for postprocessing of the response signal to determine a composition of the targeted material. The generating module includes at least two laser sources, each laser source being able to generate a laser signal at a predetermined wavelength, an upstream mixer able to mix the laser signals generated by the different laser sources, and a first modulator able to modulate the composite signal at a first modulation frequency to form the emission signal.
G01J 3/427 - Spectrométrie à double longueur d'onde
G01N 21/31 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique
89.
Method of frequency comb generation, associated generation module, remote spectroscopy method and associated spectroscopy device
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Hébert, Philippe
Lemaître, François
Orlik, Xavier
Dartigalongue, Thibault
Abrégé
A method of generating frequency combs composed of a predetermined number of rays, wherein the method includes the modulation of a main ray generated by a laser source (20), by a first radiofrequency signal at a first frequency value, by a second radio frequency signal at a second frequency value, and by a third radio frequency signal at a third frequency value. The second frequency value is equal to twice the first frequency value. The third frequency value is equal to three times the first frequency value.
G01N 21/39 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique en utilisant des lasers à longueur d'onde réglable
G01S 7/48 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
G01S 17/88 - Systèmes lidar, spécialement adaptés pour des applications spécifiques
Office National d'Etudes et de Recherches Aerospatiales (ONERA) (USA)
Inventeur(s)
Goupil, Philippe
Delporte, Martin
Seren, Cedric
Hardier, Georges
Alcalay, Guillaume
Abrégé
A device for monitoring and estimating parameters relating to the flight of an aircraft includes an estimation module 4 for determining an estimation of the values of the parameters relating to the flight of the aircraft and for generating residues, a detection module for determining the statuses associated with each of said sensors C1, C2, . . . , CN and with a parameter P1 corresponding to the weight of the aircraft, a transmission module for transmitting the statuses associated with each of said sensors C1, C2, . . . , CN to a user device and, on the next iteration, to the estimation module.
G01C 23/00 - Instruments combinés indiquant plus d’une valeur de navigation, p.ex. pour l’aviation; Dispositifs de mesure combinés pour mesurer plusieurs variables du mouvement, p.ex. la distance, la vitesse ou l’accélération
G05B 17/02 - Systèmes impliquant l'usage de modèles ou de simulateurs desdits systèmes électriques
B64D 43/02 - Aménagements ou adaptations des instruments pour indiquer la vitesse des aéronefs ou les conditions de décrochage
G01C 5/00 - Mesure des hauteurs; Mesure des distances transversales par rapport à la ligne de visée; Nivellement entre des points séparés; Niveaux à lunette
G01C 9/00 - Mesure de l'inclinaison, p.ex. par clinomètres, par niveaux
91.
SELF-ADAPTING GAS TURBINE FIREBOX WITH VARIABLE GEOMETRY
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Guin, Christian
Paun, Florin
Abrégé
The invention relates to a self-adapting gas turbine firebox with variable geometry, comprising at least one system with a variable opening for automatically adjusting a configuration of the combustion inside a combustion chamber (101) according to an air temperature, particularly air from a compressor. The adjustment is performed by a thermosensitive element that controls at least one section towards the combustion chamber, for the air that participates in the combustion of the fuel, or participates in a dilution of the gases effective inside the combustion chamber.
F23R 3/06 - Disposition des ouvertures le long du tube à flamme
F23N 5/04 - Systèmes de commande de la combustion utilisant des dispositifs sensibles aux variations thermiques ou à la dilatation thermique d'un agent utilisant des éléments bimétalliques
F23R 3/14 - Aménagements de l'entrée d'air pour l'air primaire créant un tourbillon au moyen d'ailettes de tourbillonnement
F23R 3/22 - Moyens de stabilisation de la flamme, p.ex. accroche-flamme de postcombustion d'ensembles fonctionnels à propulsion par réaction réglables, p.ex. autoréglables
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Bierret, Antoine
Vincent, Gregory
Haidar, Riad
Pardo, Fabrice
Pelouard, Jean-Luc
Abrégé
According to one aspect, the present description relates to a device (20) for multispectral imaging in the infrared suitable for detecting at least one first and one second detection wavelength. It comprises a detection matrix array (23) comprising a set of elementary detectors (23i) of preset dimensions forming an image field of given dimensions; and an image¼ forming optic (22) having a given aperture number (N) and a given focal length (F), said number and length being suitable for forming, at every point of the image field, an elementary focal spot, said focal spot covering a set of at least two juxtaposed elementary detectors. The device furthermore comprises a matrix array (24) of elementary metallo-dielectric quided-mode-resonance filters, said matrix array being arranged in front of the detection matrix array (23) at a distance smaller than a focal depth of the optic (22), the dimensions of the elementary filters being chosen so that each elementary focal spot formed at each point of the image field covers at least two elementary filters; and the elementary filters are optimized for passband transmission in spectral bands centered on two different central wavelengths, equal to two of said detection wavelengths.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (ONERA) (France)
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
Inventeur(s)
Bierret, Antoine
Vincent, Grégory
Haidar, Riad
Pardo, Fabrice
Pelouard, Jean-Luc
Abrégé
According to one aspect, the present description relates to a device (20) for multispectral imaging in the infrared, suitable for detecting at at least one first and one second detection wavelength. It comprises a detection matrix array (23) comprising a set of elementary detectors (23i) of preset dimensions forming an image field of given dimensions; and an image-forming optic (22) having a given aperture number (N) and a given focal length (F), which aperture number and focal length are suitable for forming, at any point of the image field, an elementary focal spot covering a set of at least two juxtaposed elementary detectors. The device furthermore comprises a matrix array (24) of elementary metal-dielectric guided-resonance filters, which matrix array is arranged in front of the detection matrix array (23) at a distance smaller than a focal depth of the optic (22), the dimensions of the elementary filters being such that each elementary focal spot formed at each point of the image field covers at least two elementary filters; and the elementary filters are optimised for pass-band transmission in spectral bands centred on two different central wavelengths, equal to two of said detection wavelengths.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Lambert, Oceane
Davoine, Cecile
Abrégé
The invention relates to a sintered metal material comprising at least one magnetic part, characterised by directional through-pores having a size of between 1 and 100 µm, said material having a density varying by less than 20% from one sample of 1cm3 to another taken from a one-piece part made from the material.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES (ONERA) (France)
Inventeur(s)
Lambert, Océane
Davoine, Cécile
Abrégé
The invention relates to a sintered metal material comprising at least one magnetic part, characterised by directional through-pores having a size of between 1 and 100 μm, said material having a density varying by less than 20% from one sample of 1cm3 to another taken from a one-piece part made from the material.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Elias, Paul-Quentin
Abrégé
A device for measuring a flow rate of a gas comprises a probe (S), a voltage source (5) and a pulse-counting detection circuit (7). The probe includes an axial electrode (1) an uncovered end (1P) of which has a small radius of curvature, and a peripheral electrode (2). The voltage source applies an AC voltage between the two electrodes, and electrical discharges that occur through the gas, between the two electrodes, are detected and counted by the detection circuit. Such a device for measuring rate is particularly reliable, and suitable to be used on board an aircraft (AV) to measure its speed with respect to the surrounding air.
G01P 5/08 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides en mesurant la variation d'une variable électrique directement affectée par l'écoulement, p.ex. en utilisant un effet dynamo-électrique
G01F 1/64 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets électriques ou magnétiques en mesurant le potentiel électrique produit par l’écoulement de fluide, p.ex. par effet électrochimique, effet de contact ou effet de frottement
97.
Motorized device with reciprocating motion of a locomotion member and associated control method
OFFICE NATIONAL D'ÉTUDES ET DE RECHERCHES AÉROSPATIALES (France)
Inventeur(s)
Le Moing, Thierry
Rognant, Mathieu
Abrégé
A motorized device capable of moving in a fluid and including one or more locomotor systems, each having at least one drive assembly linked to at least one locomotion member and a motor controlled by a voltage. The frequency of a reciprocating motion of the drive assembly matches the resonant frequency of the locomotion member linked to a non-movable portion by at least one prestrained elastic member. The instantaneous amplitude of the reciprocating motion of the drive assembly is adjusted to control the average position and the maximum amplitude of the reciprocating motion of the locomotion member. The drive assembly includes at least one speed reducer for reducing the speed of rotation of the motor. When the motor is operating at its maximum mechanical power, the speed of rotation transmitted to the at least one locomotion member is reduced to match the resonance frequency.
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
SAFRAN HELICOPTER ENGINES (France)
Inventeur(s)
Rame, Jeremy
Belaygue, Philippe
Caron, Pierre
Delautre, Joel
Jaquet, Virginie
Lavigne, Odile
Abrégé
The invention relates to a superalloy based on nickel, comprising, in mass percentages, 4.0 to 6.0 % of chromium, 0.4 to 0.8 % of molybdenum, 2.5 to 3.5 % of rhenium, 6.2 to 6.6 % of tungsten, 5.2 to 5.7 % of aluminium, 0.0 to 1.6 % of titanium, 6.0 to 9.9 % of tantalum, 0.0 to 0.7 % of hafnium, and 0.0 to 0.3 % of silicon, the rest consisting of nickel and potential impurities. The invention also relates to a monocrystalline blade (20A, 20B) comprising such an alloy and to a turbomachine (10) comprising such a blade (20A, 20B).
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (France)
Inventeur(s)
Levy, Raphael
Aoust, Guillaume
Verlhac, Beatrice
Guerard, Jean
Le Traon, Olivier
Gaudineau, Vincent
Abrégé
An electric measurement circuit possesses an electrical reaction leg (2) for forming an oscillator (10) from a resonator (1), and furthermore possesses a measurement leg (4) the input of which is supplied by said electrical reaction leg (2). The measurement leg contains an adjustable phase shifter (41) so that an additional excitation force (Fpa) that is applied to the resonator in the measurement leg can be adjusted in phase quadrature with respect to an excitation force (Fx) that is applied to said resonator in the electrical reaction leg. Such an electrical measurement circuit is particularly suitable for forming a photoacoustic gas detector. Figure 1
B06B 1/02 - Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore utilisant l'énergie électrique
G01N 29/32 - Dispositions pour supprimer des influences indésirables, p.ex. des variations de température ou de pression
H03B 5/32 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique un résonateur piézo-électrique
H03H 9/24 - Réseaux comprenant des éléments électromécaniques ou électro-acoustiques; Résonateurs électromécaniques - Détails de réalisation de résonateurs en matériau qui n'est ni piézo-électrique, ni électrostrictif, ni magnétostrictif
100.
Cermet materials and method for making such materials
OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES (ONERA) (France)
Inventeur(s)
Julian-Jankowiak, Aurelie
Hug, Gilles
Abrégé
y, where n equals 1 or 2, x is between 1 and 3, y is between 1 and 3, and x+y≤4. The proportion by volume of the first phase in the material is between 70% and 95%. The proportion by volume of the second phase in the material is between 30% and 5%. The void ratio is less than 5%.
C22C 29/06 - Alliages à base de carbures, oxydes, borures, nitrures ou siliciures, p.ex. cermets, ou d'autres composés métalliques, p.ex. oxynitrures, sulfures à base de carbures ou de carbonitrures à base de carbures mais ne contenant pas d'autres composés métalliques
C22C 1/05 - Mélanges de poudre métallique et de poudre non métallique
C22C 29/02 - Alliages à base de carbures, oxydes, borures, nitrures ou siliciures, p.ex. cermets, ou d'autres composés métalliques, p.ex. oxynitrures, sulfures à base de carbures ou de carbonitrures
C22C 29/16 - Alliages à base de carbures, oxydes, borures, nitrures ou siliciures, p.ex. cermets, ou d'autres composés métalliques, p.ex. oxynitrures, sulfures à base de nitrures