Disclosed is a system for estimating a movement or position of a moving object, which includes: an inertial measurement unit configured to produce measurement values; a receiving unit configured to receive an electromagnetic signal from at least one satellite; a validation module for checking whether a parameter derived from the received electromagnetic signal meets a predetermined criterion; an integration module configured to determine an intermediate value based on at least one of the measurement values; and a computing module configured to compute a value representative of the movement or position based on the intermediate value and, if the parameter meets the predetermined criterion, on a phase of a carrier of the received electromagnetic signal. Also disclosed is a method for estimating the movement or position of a moving object.
Disclosed is a system and a method for deploying and recovering an autonomous underwater craft by a ship-towed recovery vehicle. The craft is stored in the recovery vehicle's housing. The deployment is carried out in a first stage submerging the recovery vehicle with the craft stored therein, and a second stage releasing the craft. The ship includes a tilting launch ramp where the recovery vehicle is stored. The launch ramp takes at least a raised position with the recovery vehicle out of the water and an inclined position with the launch ramp rear end immersed. A translational device enables, in the launch ramp inclined position, the recovery vehicle to move along the launch ramp to be submerged and move from the ship while in tow during deployment and to be raised along the launch ramp during recovery. The system and the craft form an underwater exploration assembly.
The invention relates to a device (100) for measuring the angular errors in the inclination of a true axis of rotation (204) of a rotary element (101), the device comprising control electronics (111) controlling the rotation of the rotary element (101) about its true axis of rotation (204), a first and a second rotation sensor (112a, 112b) for obtaining angular velocities about two measurement axes (302, 304) which are orthogonal to one another and both orthogonal to the true axis of rotation (204), a third rotation sensor (112c) making it possible to obtain the angular position and angular velocity of the rotary element (101) about its true axis of rotation (204), at least two of the aforementioned sensors being inertial sensors making it possible to obtain projections of the vector of the speed of rotation of the Earth onto at least two axes of projection, an acquisition unit (113), a measurements-storage memory (114), a computation unit (115) configured to compute, from the angular positions and velocities obtained from the aforesaid sensors, the angular errors in the inclination of the true axis of rotation (204) of the rotary element (101).
G01C 9/00 - Measuring inclination, e.g. by clinometers, by levels
E21B 47/022 - Determining slope or direction of the borehole, e.g. using geomagnetism
G01B 21/22 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for testing the alignment of axes
4.
CLIMATIC CHAMBER HAVING THERMAL REGULATION FOR MOTION SIMULATOR, AND METHOD FOR THERMAL REGULATION, AND INSTALLATION KIT
The invention relates to a climatic chamber (3) having thermal regulation, for testing at least one device, wherein at least one thermoelectric assembly passes through the wall of the climatic chamber (3), each thermoelectric assembly comprising two faces, an inner face inside the climatic chamber and an outer face outside the climatic chamber (3). A heat exchange end (4) for an outer face of a thermoelectric assembly of a secondary thermal regulation circuit (9) is placed in thermal contact with each thermoelectric assembly outer face, the secondary thermal regulation circuit (9) being outside the climatic chamber and comprising a heat transfer fluid circuit, a cold source (8), a hot source (12), a mixing device (13), a circulating pump (15), and sensors (5a, 5b, 5c, 5d, 6, 7). A temperature regulation system of the chamber is configured to control the electric current of said at least one thermoelectric assembly and to control at least the mixing device (13) and the circulating pump (15) of the secondary thermal regulation circuit (9) on the basis of a chamber setpoint temperature and measurements from sensors (5a, 5b, 5c, 5d, 6, 7).
ττ defining a natural frequency (A). According to the invention, the laser source (8) is a monofrequency laser source and the light generator (1) comprises modulation means (7, 9) designed to modulate the source beam (10) at a modulation frequency equal to (B), where n is an integer greater than or equal to 1, and the photodetector (5) and the electronic signal-processing system (6) are configured to acquire and process a signal representative of the interference beam (15) at a demodulation frequency equal to (C).
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
6.
DEVICE AND METHOD FOR ESTIMATING THE LOCATION OF A VEHICLE GUIDED ALONG A CURVILINEAR GUIDE
The invention relates to a device and method for estimating the location of a guided vehicle (603) along a guide, the device comprising: an attitude sensor of the guided vehicle providing values of attitude component measurements of the vehicle; a memory (604) for storing virtual attitude beacon data comprising values of one or more of the attitude components of the virtual attitude beacon and at least one virtual attitude beacon attribute value, including at least one position attribute value of said beacon; and a processor (602) configured to perform an activity of a virtual attitude beacon reader (710), the virtual attitude beacon reader (710) comparing the stored virtual attitude beacon data and the vehicle attitude measurement values in order to detect an instance of a measurement value of the corresponding attitude component exceeding a value of an attitude component of the virtual attitude beacon data, said attitude component advantageously being the geographic heading.
G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
G01C 21/20 - Instruments for performing navigational calculations
G01C 21/28 - Navigation; Navigational instruments not provided for in groups specially adapted for navigation in a road network with correlation of data from several navigational instruments
B61L 25/02 - Indicating or recording positions or identities of vehicles or vehicle trains
7.
DEVICE AND METHOD FOR AUTONOMOUSLY CONTROLLING A BOAT
The invention relates to a control device for a boat (10), comprising members (100, 200, 300) which provide steering, propulsion and safety functions for the boat. The control device comprises: • - sensors, • - a central processing unit (20), • - at least two peripheral modules (110, 210, 310) which are associated with the members and which each comprise an interface for receiving data from the sensors, ◦ an interface for controlling the member associated therewith, ◦ a processing unit, and ◦ an interface for communicating with the central processing unit, the processing unit and the central processing unit being programmed to generate instructions for driving the member.
B63B 79/10 - Monitoring properties or operating parameters of vessels in operation using sensors, e.g. pressure sensors, strain gauges or accelerometers
B63B 79/40 - Monitoring properties or operating parameters of vessels in operation for controlling the operation of vessels, e.g. monitoring their speed, routing or maintenance schedules
The invention relates to a fibre-optic polarization orienting and filtering device (1) comprising a first single-mode optical fibre (SM1), having a downstream end (42), and a polarizing optical fibre (PZ), having a first end (81) and a second end (82), characterized in that the device (1) further comprises: - a first rigid opto-mechanical linking region (ZL1) connecting the downstream end (42) of the first single-mode optical fibre (SM1) and the first end (81) of the polarizing optical fibre (PZ) along a first linking axis, and - an orientation adjusting system (13), the system being suitable for adjusting the angular position of the first linking region (ZL1) about the first linking axis (D1).
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G02B 6/27 - Optical coupling means with polarisation selective and adjusting means
9.
MOVEMENT TRANSMISSION AND TRANSFORMATION DEVICE AND VEHICLE FITTED WITH SUCH A DEVICE
The invention relates to a movement transmission and transformation device (10), comprising a first helical connection system (120) which connects an input shaft (100) pivotably mounted on a support to an intermediate shaft (200) slidably mounted on the support. According to the invention, a second helical connection system (320) is further provided which connects the intermediate shaft to an output shaft (300) which is pivotably mounted on the support, and the first helical connection system has a pitch (P120) which is different from the pitch (P320) of the second helical connection system.
GENERATOR FOR GENERATING AN ANTI-KERR-EFFECT MODULATED LIGHT SIGNAL, INTERFEROMETRY MEASURING DEVICE COMPRISING SUCH A GENERATOR, AND METHOD FOR MODULATING A LIGHT SIGNAL
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G01R 15/24 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
11.
METHOD FOR REDUCING THE KERR EFFECT IN AN INTERFEROMETRY MEASURING DEVICE, AND INTERFEROMETRY MEASURING DEVICE CONFIGURED TO IMPLEMENT THIS METHOD
The invention relates to a method for reducing the Kerr effect in an interferometry measuring device (1) comprising a generator configured to emit an input periodic light signal (3), and a Sagnac interferometer (4) in which two counterpropagating signals (15, 16) travel and combine so as to form a periodic output signal (11) having at least two power values, the method comprising a. determining a phase shift between the two counterpropagating signals (15, 16) a first time and cancelling out the phase shift, and then b. determining a phase shift between the two counterpropagating signals (15, 16) a second time, c. adjusting the ratio between the average powers of the counterpropagating signals (15, 16) so as to cancel out the value of the phase shift determined in the second determination. The invention also relates to an interferometry measuring device configured to implement the method according to the invention.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
12.
SUBSEA AUTOMOTIVE SYSTEM TRAVELLING ALONG A PIPELINE
Subsea automotive system (1) comprising moving means (6, 7, 12, 13) for moving coaxially along a pipeline (2), an elongated body (5), at least three bearing members (6, 7, 12, 13) each capable of bearing in a mobile, rolling or sliding manner on the pipeline (2) in order to roll and/or slide in a stable manner in at least one direction at least parallel to the pipeline (4), at least one articulated side arm supporting at least one of the bearing members, enabling said bearing member to move transversely to the body (3) between, on the one hand, an open position for installing the system on the pipeline and, inversely, uninstalling the system, and, on the other hand, an operating position in which the at least one bearing member supported by the at least one articulated arm is folded back so as to bear against the pipeline in order to form, with the other bearing members, a movable connection between the body and the pipeline, at least three of the bearing members (6, 7, 12, 1 3) being applied, in the operating position, to the pipeline (2) in radial directions (16, 17, 18) which are angularly offset about the axis of the pipe and are separate from one another.
Disclosed is a motorised wave-piercing ship (10, 20) with hull (11, 19) with a deck (19), the ship (10, 20) comprising a conning tower (14) and, under the hull (11), a weighted keel (12, 13), the keel (12, 13) being removable and being able to be placed in a low position and a high or extracted position. According to the invention, the ship (10, 20) can sail as a monohull (10) or as a trimaran (20), the hull (11, 19) comprising a device for removable attachment of an anti-roll stabilisation system (1) comprising an elongate connection arm (3) terminated at its two lateral ends by two floats (2), the connection arm (3) comprising an attachment member, the attachment member being configured to be removably attached on the attachment device in order to transform the ship (10) into a trimaran (20), and the ship (10, 20) is a monohull (10) in the absence of the anti-roll stabilisation system (1).
B63B 1/12 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
B63B 1/14 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently
B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
B63B 35/00 - Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
14.
METHOD FOR CALCULATING AN INSTANTANEOUS VELOCITY VECTOR OF A RAIL VEHICLE AND CORRESPONDING SYSTEM
B61L 15/00 - Indicators provided on the vehicle or vehicle train for signalling purposes
B61L 25/02 - Indicating or recording positions or identities of vehicles or vehicle trains
G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
G01P 7/00 - Measuring speed by integrating acceleration
G01P 15/00 - Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
15.
METHOD FOR ESTIMATING ANGULAR ERRORS OF ANGLE CODERS IN PRECISION ROTARY DEVICES, DEVICE
ωrjωrjωrj, the corrector having substantially zero gain at said frequency and its harmonics, resulting in an opening of the loop at said frequencies, a matrix relation is established between the position measurements and a function of parameters characterising the coder errors and the torque ripples, the test phase is repeated with different speeds, the matrix relations are concatenated to obtain an identifiable global matrix relation, the encoder error and torque ripple parameters are estimated by resolution of the global matrix relation.
G01C 25/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
G01D 5/347 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
G01D 5/244 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains
G01D 18/00 - Testing or calibrating apparatus or arrangements provided for in groups
16.
SYSTEM FOR RECOVERING AUTONOMOUS UNDERWATER OR SURFACE WATER VEHICLES
The invention relates to a system for recovering, in a support and storage structure (3), an autonomous aquatic vehicle (1, 6), the structure (3) comprising an access opening (12) through which the autonomous vehicle can pass to enter into a housing of the structure (3) or leave said housing in a main access direction (13), at least one drive member (4) of the autonomous vehicle (1, 6) being arranged in the access opening (12), the drive member (4) comprising at least one movable motorised drive element (7) which can be engaged with the shell of the autonomous vehicle (1, 6) and which enables the autonomous vehicle (1, 6) to be driven into or out of the structure (3).
The invention relates to a system (1, 2) (1, 4) for handling marine (3) or underwater (5) drones, the system (1, 2) (1, 4) comprising a drone interface module (2, 4) and a floating pontoon (1) with two hulls (11) and an arch (10), the pontoon (1) is catamaran-shaped and delimits a downflooded reception space (17), the arch (10) comprises at least one device (12) for attachment to a winch cable, the pontoon (1) comprises devices (13) for detachable attachment to a drone interface module (2, 4) detachably and interchangeably installed in the receiving space (17), the drone interface modules (2, 4) forming an at least partially flooded docking area (23, 42) for the drone (3, 5), the drone interface modules (2, 4) have a lower portion (22, 43) configured to rest stably on a flat surface after the drone interface module (2, 4) has been removed from the pontoon (1).
B63B 1/12 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
B63B 27/36 - Arrangement of ship-based loading or unloading equipment for cargo or passengers for floating cargo
The invention relates to an antenna support (1) comprising: - a base (10), - at least one ring (20) comprising means for securing an antenna element, - guide means (30) for guiding rotation of the ring about an axis of rotation (A1), - drive means (40) for rotating the ring around the axis of rotation, and - means (50) for determining the angular position of the ring about the axis of rotation. According to the invention, the guide means, the drive means and the determination means are mounted on the base on the external side of the ring.
H01Q 1/18 - Means for stabilising antennas on an unstable platform
H01Q 3/04 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation
H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
19.
SHIP COMPRISING A SYSTEM FOR ADAPTING A REMOVABLE MODULE AND ADAPTED REMOVABLE MODULE
The invention relates to a base ship (1) that can receive, in a removable and interchangeable manner, a particular module (3) among various modules, the module being adapted to a functional specialisation of the ship. The base ship is similar to a catamaran in its rear portion because it comprises two parallel rear lateral volumes that are substantially symmetric with respect to a vertical longitudinal sagittal plane of the base ship, and the removable module is inserted and secured between the two rear lateral volumes of the base ship in order to form a functionalised ship.
Disclosed is a device (1) for connecting two parts of a hull (3) of a ship, comprising: - a first frame (2) intended to be integral with a first part (30) of the hull (3), - a second frame (4) intended to be integral with a second part (31) of the hull (3) - a tenon (5) integral with the first frame (2) - a mortise (6) provided in the second frame (4) and able to receive the tenon (5) promoting a relative movement in translation of the two frames (2, 4) towards one another in a longitudinal insertion direction, - a pin (8) which is able to be engaged, on the one hand, in a transverse housing (21) provided in the second frame (4) and opening into said mortise and, on the other hand, in a transverse through-hole (54) provided in the tenon (5), so as to retain the tenon (5) in the mortise (6). Also disclosed is a hull of a ship comprising such a device.
B63B 3/08 - Hulls assembled from prefabricated sub-units with detachably-connected sub-units
B63B 7/04 - Collapsible, foldable, inflatable or like vessels comprising only rigid parts sectionalised
F16B 12/12 - Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
F16B 12/24 - Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using separate pins, dowels, or the like
F16B 12/20 - Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like
F16B 12/22 - Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using keyhole-shaped slots and pins
21.
DEPOINTABLE PARAMETRIC ECHOSOUNDER, AND METHOD FOR CHARACTERIZING A PORTION OF THE SUB-BOTTOM OF A SUBAQUATIC ENVIRONMENT
ss) that is directed toward a point (P1) on the bottom (4) of the subaquatic environment (3); and b) acquire an echo signal, the frequency of which is equal to the difference between the first and second frequencies, the echosounder being configured to perform steps a) and b) a plurality of times while varying the orientation of the axis of superposition, and to determine, on the basis of the acquired echo signals, an image representative of the content of the sub-bottom (40) of the subaquatic environment beneath each of said points. The invention also relates to an associated method for characterizing a portion of the sub-bottom of a subaquatic environment.
The invention relates to a device for the sealed passage of at least one longitudinal element (60) through a through-hole (TR) provided in a partition (CL), comprising - a frame (2) capable of being permanently fastened in a sealed manner on the partition in order to delimit the hole (TR), - a removable insert (3), of which at least a central portion (7) is produced by moulding on the longitudinal element (5) in order to produce a sealed connection with the latter, the removable insert (3) being configured to be inserted in a removable and sealed manner in the frame (2).
The cleat (1) intended for mooring a watercraft (6) at a thrown end of a line (2) has a base (17) surmounted by a body (10), the base (17) being intended to be fastened to a deck (3) of the watercraft, the line (2) having a rope (20) and a stopper (21, 21') formed by at least one transverse protuberance, the cleat (1) having an engagement part (11) that adjoins the base (17) and has a through-opening (12) to an elongate slot (13) in the body, said slot (13) having a height allowing the longitudinal progression and transverse passage of the rope (20) from the opening towards the interior of the body, the opening (12) having a funnel shape, the slot leading into a chamber (14) in the body (10), the chamber (14) having a minimum dimension greater than the minimum height of the slot (13), the maximum dimension of the chamber (14) being less than the dimension of the protuberance forming the stopper (21, 21') in order that the stopper (21, 21') of a line (2) passing transversely through the body (10) can be blocked against a side face of the body (10) both when the rope (20) is in the slot (13) and when it is in the chamber (14).
Disclosed is a system and method for deploying and recovering an autonomous underwater craft (12) by a recovery vehicle (11) towed by a ship (1), the craft (12) is stored in a housing of the recovery vehicle (11), the deployment can be carried out in two stages, a first stage of submerging the recovery vehicle (11) with the craft (12) stored in the recovery vehicle, and a second stage of releasing the craft (12). According to the invention, the ship comprises a launch ramp (10) which is tilting and the system is configured to store the recovery vehicle (11) on the launch ramp (10), the launch ramp (10) being able to take at least two positions: a raised position in which the stored recovery vehicle (11) is out of the water and an inclined position in which the rear end (15) of the launch ramp (10) is immersed, the system comprising a translational device enabling, in the inclined position of the launch ramp (10), the recovery vehicle (11) to move along the launch ramp (10) in order to be submerged and move away from the ship (1) while being towed by the ship during the deployment and in order to be raised along the launch ramp (10) during the recovery. The system and the craft (12) form an underwater exploration assembly.
SIGHTING SYSTEM COMPRISING A SIGHTING DEVICE THAT CAN BE ORIENTED RELATIVE TO A BASE, THE SYSTEM BEING CAPABLE OF IMPLEMENTING A SIMPLE AND RAPID ON-SITE CALIBRATION METHOD
The invention relates to a sighting system (2) comprising a sighting device (20) that can be oriented relative to a base (4), the system being capable of implementing a simple and rapid on-site calibration method. To this end, the sighting system (2) comprises a barrel (16) holding at the base (4) a sighting device (20) provided with a sighting direction (26). The sighting system (2) comprises a first inclination sensor (28) linked to the base (4), and a second inclination sensor (30) linked to the sighting device (20). The inclination sensors are connected to a central unit (24) capable of measuring a difference between the measurements taken by each inclination sensor, so as to quantify an angle of inclination between the base (4) and the sighting device (20) without the need for cumbersome equipment.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G01R 15/24 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
27.
PASSIVE SHOCK-ABSORBING SYSTEM FOR A SIGHTING APPARATUS
The invention relates to a passive shock-absorbing system (1) for a sighting apparatus (2) installed on a device (3, 30) comprising equipment (31) that generates said shocks, the system (1) comprising two rigid plates (10, 11) substantially parallel to one another, with a first plate (11) secured to the part of the device (3, 30) comprising the equipment and a second plate (10) secured to the sighting apparatus (2), the plates (10, 11) being connected to one another by a position return means for returning the plates (10, 11) to a determined relative rest position after absorbing a shock. The system is characterized in that the position return means comprises a line-point-plane positioning means with balls (13, 14, 15) between the two plates (10, 11) and a set of elastic return members (12, 16) connecting the two plates (10, 11) to one another. A corresponding device completes the invention.
F41G 11/00 - WEAPON SIGHTS; AIMING - Details of sighting or aiming apparatus; Accessories
F16F 15/04 - Suppression of vibrations of non-rotating, e.g. reciprocating, systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means
28.
AUTONOMOUS OPTRONIC MODULE FOR GEOLOCATED TARGET POINTING FOR A PORTABLE SYSTEM, AND CORRESPONDING SYSTEM
The invention relates to an autonomous visual pointing module (1) producing information regarding the position of a target aimed at by a user and intended to be installed on a portable device (11) so as to form a portable and autonomous system with visual target pointing, the information regarding the position of the target being at least the heading of the target. The module comprises: - an autonomous power supply (3); - electronic control and calculation circuits and an electronic interfacing circuit (4) for interfacing with the user; - a motion sensor comprising an inertial navigation system, INS, (6) or an attitude and heading reference system, AHRS, comprising gyrometers and accelerometers; - a satellite geopositioning receiver, GNSS, (5) for providing the module position in real time and continuously; - an optronic unit comprising a set of telescope optical sensors (14) and/or cameras (7) for visually pointing the module at the aimed-at target, and a rangefinder (9) for determining the distance between the target and the module. The gyrometers are fibre-optic.
G01S 19/49 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system whereby the further system is an inertial position system, e.g. loosely-coupled
G01S 7/00 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , ,
G01S 17/02 - Systems using the reflection of electromagnetic waves other than radio waves
29.
METHOD FOR DRIVING THE DISPLAY OF INFORMATION ON A SCREEN BANNER EQUIPPING A BOAT GANGWAY
The invention relates to a method for driving the display of information on a screen banner (100) equipping a boat gangway control post (10), the control post comprising at least one image sensor oriented towards the bow of the boat. According to the invention, the method comprises: -a step of acquiring, by means of each image sensor, an image representing the environment ahead of the boat, -a step of processing said image so as to detect each noteworthy zone of this image, and -a step of driving the screen banner so that it displays the image and, superimposed with this image, at least one graphical element distinguishing said noteworthy zone.
G06F 3/0481 - Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
B63B 49/00 - Arrangements of nautical instruments or navigational aids
G01C 21/20 - Instruments for performing navigational calculations
30.
METHOD FOR CORRECTING A PREVIOUSLY ESTIMATED POSITION OF A VEHICLE
The invention relates to a method for resetting the estimated position of a vehicle (10). According to the invention, the method comprises: - a step of receiving by a RADAR system (11) a real RADAR image, - a step of acquiring an estimated position of the vehicle, - a step of calculating by a computer (12) equipping said vehicle a simulated RADAR image, as a function of the estimated position of the vehicle and of a cartographic model of the environment of the vehicle, - a step of comparing the real RADAR image and the simulated RADAR image, and - a step of correcting the estimated position of the vehicle as a function of the result of the comparison.
G01S 13/89 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging
G01S 13/93 - Radar or analogous systems, specially adapted for specific applications for anti-collision purposes
G01S 13/87 - Combinations of radar systems, e.g. primary radar and secondary radar
G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
G01C 21/00 - Navigation; Navigational instruments not provided for in groups
G01S 13/937 - Radar or analogous systems, specially adapted for specific applications for anti-collision purposes of marine craft
G01S 13/60 - Velocity or trajectory determination systems; Sense-of-movement determination systems wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (France)
UNIVERSITE DE BORDEAUX (France)
Inventor
Barrett, David Brynle
Cheiney, Pierrick
Bouyer, Philippe
Abstract
The invention relates to a multi-axis atom interferometer system comprising a source (10) of cold atoms, a laser source generating a first light pulse designed to spatially separate the source of cold atoms into a first cloud of atoms (1) propagating along a first trajectory along a first axis (X) and a second cloud of atoms propagating along a second trajectory along a second axis (Y), a second light pulse suitable for spatially deflecting the first trajectory along the second axis (Y) and simultaneously the second trajectory along the first axis (X) towards a first point (51) and a last light pulse suitable for recombining said at least one portion of the first cloud of atoms and said at least one portion of the second cloud of atoms at the first point, and a detection system measuring an interferometric phase shift accumulated between the first light pulse and the last light pulse.
G01C 19/58 - Turn-sensitive devices without moving masses
G01P 15/02 - Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces
G01P 15/08 - Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values
The invention relates to a Sagnac interferometer with a looped or straight optical fibre. According to the invention, the interferometer comprises an integrated hybrid optical path (200) having at least a first, electro-optical, substrate (1) and a second, transparent, substrate (2) with a common interface (20), the first substrate (1) comprising a first optical waveguide (11), a second optical waveguide (12), the first optical waveguide (11) and the second optical waveguide (12) being connected to at least one end (61) of the optical fibre coil (6), and an input-output optical waveguide (10) connected to a light source (4) and to a sensing system (5), the second substrate (2) comprising at least one U-shaped optical waveguide (21) and the integrated hybrid optical path (200) comprising a planar waveguide Y-junction (26) with a common branch (160) and two secondary branches (161, 162).
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
33.
METHOD FOR DETERMINING A DEPTH OR A BATHYMETRIC PROFILE BASED ON AN AVERAGE SOUND SPEED PROFILE, METHOD FOR DETERMINING SUCH A SPEED PROFILE, AND RELATED SONAR SYSTEM
The invention relates to a method for determining a difference in depth or a lateral distance in relation to the vertical between two points (O2, M) of an underwater environment (E), in particular by measuring a propagation time of a sound wave. Said determination is based on a single-layer model of the environment in which the wave is supposed to propagate in a straight line along an effective propagation direction, at an average speed that is independent of the propagation direction. The invention also relates to a method for determining the profile of said average speed based on the measurements of differences in depths per se, a determination of the local speed profile over the variation interval of the sounded depths, and a related sonar system (10).
G01S 15/42 - Simultaneous measurement of distance and other coordinates
G01S 15/89 - Sonar systems specially adapted for specific applications for mapping or imaging
G01S 7/52 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
34.
SYSTEM FOR UNDERWATER EXPLORATION USING A SUBMERGED DEVICE HAVING LOCAL PRODUCTION OF ELECTRICAL ENERGY AND TOWED BY A SURFACE VESSEL
The invention relates to a system for underwater exploration using a submerged device (1) towed by a surface vessel, the submerged device (1) being connected to the vessel by a towing line (2) and comprising equipment supplied by the electricity, characterized in that the submerged device (1) comprises at least one device for the local production of electrical energy, said device being an electric hydrogenator (6) and in that the towing line (2) has no electrical supply cable connecting the vessel to the submerged device (1).
The invention relates to means (20, 3, 41, 31) for securing an insert (2) to the end of a cylindrical protuberance (40) in a sonar (1), the insert (2) being covered or formed externally by a polymer membrane (21) having resilient properties. According to the invention, the insert (2) includes, on the periphery of its base (22), a hollow cylindrical skirt (20) forming a first securing means and configured to be inserted around the protuberance (40) while being resiliently stressed against the protuberance (40), a clamping ring (3) forming a second securing means is inserted around the skirt (20) to sandwich same between the cylindrical outer surface of the protuberance (40) and the cylindrical inner face of the clamping ring (3), and the cylindrical outer surface of the protuberance (40) includes at least one recess (41) and the cylindrical inner surface of the clamping ring (3) includes at least one indentation (31) projecting towards the inside of the clamping ring (3), the indentation (31) or at least one of the indentations (31) being aligned with the recess (41) or at least one of the recesses (41) when the clamping ring (3) is in place in order to force the polymer of the skirt (20) into the one or more recesses (41) aligned with the one or more indentations (31), the one or more recesses (41) and indentations (31) forming a third securing means, said at least one indentation (31) being configured so as to be able to deform resiliently outwards allowing it to disappear when the clamping ring (3) is installed.
F16B 21/16 - Means without screw-thread for preventing relative axial movement of a pin, spigot, shaft, or the like and a member surrounding it; Stud-and-socket releasable fastenings without screw-thread by separate parts with grooves or notches in the pin or shaft
F16B 2/08 - Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using bands
36.
SYSTEM FOR DEPLOYING AND RECOVERING AN AUTONOMOUS UNDERWATER DEVICE, METHOD OF USE
The invention relates to a system (1, 1', 1'') for deploying and recovering an autonomous underwater device (4) using a surface carrier ship (2, 6, 7), which system comprises, in addition to the carrier ship (2, 6, 7), a sub-aquatic vehicle (3) which is guided by a connection wire (5) which is connected to the carrier ship (2, 6, 7), the sub-aquatic vehicle (3) being able to be positioned in a storage configuration in which the sub-aquatic vehicle (3) is fixedly joined in a removable manner to the carrier ship (2, 6, 7) in a storage zone of the carrier ship, or in a configuration for use, in which the sub-aquatic vehicle, when separated from the carrier ship (2, 6, 7), is in the water and at a distance from the carrier ship while remaining connected by the connection wire (5), the sub-aquatic vehicle (3) comprising propulsion, guiding and stabilising means and a station for receiving the autonomous underwater device (4) which allows the autonomous underwater device (4) to be removably attached to the sub-aquatic vehicle (3), the receiving station and the autonomous underwater device (4) comprising complementary automated docking means which allow the autonomous underwater device (4), when deployed, to automatically dock with the receiving station of the sub-aquatic vehicle (3) during the recovery and to attach itself thereto.
The invention relates to a device (70) for measuring at least one speed of rotation of a head (2) of a user about a measurement axis, comprising: - a headgear (72) designed to be placed on an ellipsoid body representing the head of the user; - a fibre-optic gyrometer comprising at least one coil (73A) made of an optical fibre wound ring-like multiple times around an axis of the coil (z7A). According to the invention, an angle formed between: - the central plane of the coil, and - a plane tangential to the ellipsoid body in a point situated at the intersection between the ellipsoid body and the coil axis, is smaller than 20 degrees.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
G06T 19/00 - Manipulating 3D models or images for computer graphics
G06F 3/0346 - Pointing devices displaced or positioned by the user; Accessories therefor with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
38.
MARINE SURFACE DRONE AND METHOD FOR CHARACTERISING AN UNDERWATER ENVIRONMENT IMPLEMENTED BY SUCH A DRONE
The invention relates to a marine surface drone (1) comprising: - an on-board multi-beam sonar (10); - a system (41) for controlling the sonar, configured to command, for a given position of the drone, a plurality of consecutive emissions of acoustic waves, the control system controlling the sonar emitters (12) so as to vary the characteristics of the emitted acoustic waves, from one of said emissions to the next, and - an acquisition unit (42) configured to determine, from echo signals acquired in response to said plurality of emissions, a three-dimensional image representing the content of a given observation volume. The invention also relates to a method for characterising an underwater environment, implemented by such a drone. Figure
The invention relates to a method for connecting a movable connector part (4) to a stationary connector part, said movable part (4) being initially placed on a support and said stationary part being covered by a cap (6). Said method comprises the following steps: gripping the cap (6) by means of a lifting tool (10); depositing the cap (6) on the movable part (4) by means of the lifting tool (10); and transporting the assembly of the cap (6) and movable part (4) to the stationary part, by means of the lifting tool (10), in order to connect the stationary part and the movable part (4) to each other.
H01R 13/523 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
H01R 43/26 - Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for engaging or disengaging the two parts of a coupling device
H01R 13/533 - Bases or cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
40.
ELECTRICAL CONNECTOR AND ELECTRICAL CONNECTION ASSEMBLY
An electrical connector comprises an electrically conductive contact element (122) and a support (70). The contact element (122) is supported by an intermediate element (120) made of an elastically deformable material and connected to said support (70). An electrical connection assembly comprising a connector of said type is also described.
H01R 13/523 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
H01R 24/38 - Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
H01R 24/58 - Contacts spaced along longitudinal axis of engagement
41.
OPTICAL CONNECTOR, OPTICAL CONNECTION ASSEMBLY, ELECTRICAL CONNECTOR AND CONNECTION SYSTEM COMPRISING SUCH AN ELECTRICAL CONNECTOR
The invention relates to an optical connector (20) comprising a plurality of collimation elements (23a, 23b) which are associated with a plurality of optical fibres (21a, 21b), respectively, and which are carried by a support (24). According to the invention, the support is mounted for rotation in a bearing (27) about a rotation axis (z), the collimation elements (23a) are arranged in the support so as to be equidistant from this rotation axis, and the support has at least one member for angular positioning (28) about the axis. The invention also relates to an optical connection assembly (10) comprising a first such optical connector and a second optical connector (20') which is configured to be nested coaxially with the first one. It also relates to an electrical connector which is provided with such an optical connector, and a connection system comprising such an electrical connector.
cw(t)Mstst Mdydy nn Mss tt IndDD Mdyndyn lndss IndDD Sss SDD D determined for a current delay margin value that is as low as possible and therefore for the greatest performance.
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
43.
FLOATING MARITIME VESSEL COMPRISING A DETACHABLE MEASURING KEEL
The invention relates to a floating maritime vessel (1) comprising at least one hull (2) beneath a deck (4), said hull (2) extending between a bow and a stern in a longitudinal direction of the vessel (1), the vessel (1) comprising, on its lower part, a removable keel (3) and, on its upper part, a conning tower (9) erected above the deck, the keel (3) being able to be descended below the hull (2) and raised back through the hull (2), the keel (3) comprising a lower end and an upper end, the upper end of the keel connecting to the hull when the keel is in its lowered position. According to the invention, the conning tower (9) contains a keel storage space (13) and the keel (3) and the keel storage space (13) of the conning tower (9) are aligned such that the keel (3) can be raised by upward translation at least partly into the keel storage space (13) of the conning tower (9).
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (France)
UNIVERSITE DE BORDEAUX (France)
Inventor
Porte, Henri
Battelier, Baptiste
Abstract
111t)) to the first pulse (Ω, Ω1) on another high-frequency electrode (62b) of the electro-optic modulator (55), in such a way as to frequency-switch the output laser beam to a first optical frequency (ωo+Ω, ωo+Ω, ωo-Ω, ωo-Ω) offset from the first pulse (Ω, Ω1) with respect to the initial optical frequency (ωo).
G01C 19/62 - Electronic or nuclear magnetic resonance gyrometers with optical pumping
G01P 15/093 - Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by photoelectric pick-up
G04F 5/14 - Apparatus for producing preselected time intervals for use as timing standards using atomic clocks
45.
FLOATING STRUCTURE FOR THE DEPLOYMENT AND THE RECOVERY OF AT LEAST ONE AUTONOMOUS WATERCRAFT BY A VESSEL, CORRESPONDING METHOD, CORRESPONDING SYSTEM AND CORRESPONDING VESSEL
The invention relates to a floating structure (1) intended for an autonomous watercraft (2) with a keel to be deployed and recovered on a vessel (3). The longitudinally elongate structure (1) comprises a floating port-side lateral edge (14) and a floating starboard lateral edge (13) and a submersible bottom (12) which is submerged when the structure (1) is in the water, the two lateral edges (13, 14) and the bottom (12) defining an interior space (18) which is at least partly submerged when the floating structure (1) is in the water, the lateral edges (13, 14) defining a prow at the front and, at the rear, an opening (17) towards the rear of the floating structure (1), which opening (17) is downwardly limited by the submersible bottom (12) which comprises at least one longitudinally elongate slot open towards the rear and intended for the passage of the keel (10), and the floating structure (1) is configured in order that at least the front portion of the autonomous watercraft (2) comprising the keel (10) can engage by floating inside the interior space, with the keel (10) engaging in the slot.
The invention concerns a surface vessel (1) with motorised mechanical propulsion comprising a fusiform hull (2) and a keel (3) in the bottom part of the hull, the hull (2) having an elongate shape in a longitudinal direction of the vessel, the keel (3) comprising, at the bottom end of same, a bulb (6) linked to the hull by a linking part (5) of the keel, the maximum width of the linking part (5) being smaller than the maximum width of the bulb (6), the maximum length of the linking part (5) being smaller than the maximum length of the bulb (6), said lengths and widths being considered respectively in the longitudinal direction of the vessel (1) and a horizontal transverse direction perpendicular to the longitudinal direction. The hull (2) has a total width to total length ratio of less than 0.2 and a maximum length of less than 20 metres.
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (France)
UNIVERSITE DE BORDEAUX (France)
Inventor
Barrett, Brynle
Battelier, Baptiste
Bouyer, Philippe
Napolitano, Fabien
Abstract
The invention relates to a hybrid inertial measurement system comprising a cold atom interferometric inertial sensor (50) having a laser source (20) generating a sequence of laser pulses (21, 22, 23, 29) towards a cold atom cloud (10) and a conventional inertial sensor (4, 100) attached to the inertial reference frame of the interferometric inertial sensor. According to the invention, the hybrid system comprises a signal processing system (40, 41, 42) suitable for receiving an inertial measurement signal (14, 141, 48) from the conventional inertial sensor (4, 100) and for generating in real time a non-linear frequency modulation signal (140, 420), the feedback loop electronic system being configured to modulate in real time the central optical frequency of the laser (20) according to the modulation signal (140, 420), such that the cold atom interferometric inertial sensor (50) generates a first hybrid inertial measurement signal (151) by atomic interferometry corrected for the relative movements of the inertial reference frame.
G01C 19/58 - Turn-sensitive devices without moving masses
G01P 15/093 - Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by photoelectric pick-up
48.
MEASUREMENT SYSTEM FOR AQUATIC ENVIRONMENTS COMPRISING A SURFACE VESSEL AND A SUBMERSIBLE DEVICE
The invention relates to a measurement system (1) for aquatic environments, said system comprising a surface vessel (4) and a submersible device (2), the submersible device (2) comprising a hull (29) and propulsion and guiding means (20, 21) and also sensors (25) for taking measurements, wherein the submersible device (2) can either be launched from the vessel (4) in order to then maneuver underwater independently of the vessel during a remote deployment phase, or be stored in the vessel (4) during a non-deployment phase, the vessel (4) comprising at least one hull (42) and propulsion and guiding means (40), said at least one hull (42) of the vessel (4) comprising a submerged portion located below a waterline. According to the invention, the submerged portion of said at least one hull (42) of the vessel (4) comprises a recess (43) designed to receive at least an upper portion of the hull (29) of the submersible device (2) when the latter is stored in the vessel (4), said recess (43) being arranged entirely below the waterline so that the submersible device (2) remains completely submerged during storage.
The invention relates to a method for compensating for disruptive couples for a movement simulator, said simulator including, for each axis, a monovariable correcting unit Corr(q'1) that receives a signal giving the difference between the setpoint θ r j and the measurement θ j for the corresponding axis and producing the control signal U j . According to the invention, the disruptive couples are coriolis, centrifugal and gravitational couples and furthermore a non-linear and multivariable compensating law is implemented that calculates a formula (a) estimating the disruptive couples, formula (a) being calculated on the basis of an error ε j (t) that is the control signal U j filtered by a filter H(q -1), and the simulator is modelled with a dynamic model expressing the couples in an affine way with respect to a set of base parameters ϰ according to a matrix relationship of the type: formula (b), and a subset j of base parameters, the estimation of the couples being formula (c), and, online, the αj are calculated via an iterative equation: formula (d) where ϕFj (t) = H(q-1)T(q-1)Φj(t) are the elements of the vectors formula (e) being filtered with H j Corr j G j /(1+C αj H j ), T being defined by the relationship 1 + Corr(q-1)L(q-1))⋅ T(q-1) = Corr(q-1)L(q-1) where L j (q -1) is the discreet transmittance of the transform of the product formula (f) where J j are inertias and μ1· is a positive real definite square matrix.
G05B 19/404 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
G01C 25/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
50.
MEASURING SYSTEM AND GYROMETER COMPRISING SUCH A SYSTEM
The invention relates to a system for the interferometric measurement of a physical parameter, comprising a spontaneous emission light source amplified through a stimulated emission, optically connected to a Sagnac ring interferometer, and two detectors, each supplying a measurement signal (SOUT) representative of the light output from the interferometer, and a reference signal (SREF) representative of the light output emitted by the source, which is affected by an excess relative intensity noise. According to the invention, this measurement is obtained from a difference between the measurement and reference signals, weighted by a weighting coefficient (β) which is controlled to minimise the statistical deviation of an additional weighted difference between signals (D RIN-OUTJ DRIN-REF) obtained by demodulating the measurement and reference signals by means of an additional digital demodulation sequential code (CSDN-RIN) insensitive to said parameter. The invention also relates to a gyrometer comprising such a measuring system.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
The invention relates to a method for stiffening plates (1) that are intended for the creation of ship walls and comprise laminated composite materials. In said method, firstly, at least one elongate profile member (3a, 3b, 3c) made of laminated composite material and having a transverse cross-section of a predetermined shape over the length thereof is pre-manufactured, the profile member being rigid, and secondly, a panel (2) comprising laminated composite materials at least on the surface of at least one of the two main surfaces thereof is used, and said at least one pre-manufactured profile member (3a, 3b, 3c) is assembled and attached together onto one of the main surfaces of said panel (2). The main surface of the panel receives the profile member comprising laminated composite material. The profile member has a transverse cross-section that comprises three continuous portions: two flanges (7, 7') having substantially straight cross-sections and connected to one another by a web (6) having a substantially straight cross-section. The flanges (7, 7') and the web (6) in transverse cross-section are supported by separate planes, the plane of the web (6) intersecting the two planes, supporting the flanges (7, 7'), at 90°. The profile member can have a U-shaped or H-shaped profile in particular.
The invention relates to a bathymetric system comprising a multi-beam emitting and receiving device attached to a carrier vehicle (1), configured, in a first recurrence, to measure the amplitude of a first plurality of beams reflected off the seabed, and a computer configured to determine the three-dimensional spatial coordinates of a first scan swath (11). According to the invention, in a second recurrence, the device is configured to emit a second incident beam and to measure the amplitude of a second plurality of beams reflected off the seabed, and the computer is configured to determine the three-dimensional spatial coordinates of a second scan swath (22), so that at least one probe point of the first scan swath (11) is redundant with a probe point of the second scan swath (22), and the computer is configured to calculate an altitude variation of the carrier vehicle using altitude variations of spatial coordinates of the at least one redundant probe point (31) between the first recurrence and the second recurrence.
The invention relates to a broadband underwater acoustic transceiver device (1). This device can be used in particular for positioning, detection, range finding or underwater acoustic communication. The invention consists in coaxially combining, within a transceiver device, a tonpilz transducer (2, 3, 4, 5) and a FFR transducer (4, 6,), the FFR being arranged in front of the transmission face/horn of the tonpilz transducer. In such a configuration, the tonpilz horn also acts as reflective tape for the FFR transducer, forming a common tape-horn element (4). Furthermore, an annular baffle surrounding the tonpilz pillar creates a Helmholtz cavity for broadening the emission band towards the low frequencies.
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
54.
METHOD FOR PRODUCING AN OPTICAL FIBRE COIL, OPTICAL FIBRE COIL AND OPTICAL FIBRE INTERFEROMETER
The invention relates to a method for producing an optical fibre coil (10) comprising the following steps: a. symmetrical winding of an optical fibre around a shaft (11), the winding forming a pattern comprising a same number N of layers of each half of the optical fibre, one layer comprising a set of turns of optical fibre and spaces (19, 29, 39, 49) between adjacent turns, the winding forming a sectored arrangement comprising a regular stacking area (13) comprising at least one continuous sealing surface (14, 24, 34) between two layers of adjacent turns, and an overlap area (12) where portions of optical fibre linking different turns intersect; b. infiltration of a glue (22) through an outer surface of the overlap area (12) in such a way that the glue (12) infiltrates into the spaces (19, 29, 39, 49) located between adjacent turns in the regular stacking area (13).
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
B65H 55/04 - Wound packages of filamentary material characterised by method of winding
The invention relates to an actuator which comprises two portions (10, 0) pivotably mounted relative to one another about a pivot axis, including a rotor and a stator, as well as a means for controlling the orientation of the rotor relative to the stator. The invention also relates to a positioning device comprising an actuator as mentioned above. According to the invention, one of said portions comprises a plurality of permanent magnets (60) distributed along a first arc of a circle centred on the pivot axis, and the other one of said portions comprises a plurality of windings (20) distributed along a second arc of a circle centred on the pivot axis, the radius of said second arc of a circle being substantially equal to the radius of said first arc of a circle so that the windings extend level with said permanent magnets.
H02K 21/24 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
The invention relates to a system and a method of compensation of dry friction for a mechanical system with a movable mass or inertia controlled by a control signal U and according to the prescriptions of a setpoint signal, the motion of the mass or inertia being characterized by a motion signal. On the one hand, there is defined an ideal model of the closed loop receiving as input the setpoint signal Yr and producing as output an ideal motion signal Ym relating to the motion of the mass or inertia according to the ideal model of the system, on the other hand, there is defined a law of control of compensation of dry friction producing the control signal U and which receives as input the setpoint signal Yr and makes it possible to produce a motion feedback signal Y relating to the real motion of the mass or inertia, the dry friction compensation control law based on the model of Philippe de Larminat being rendered adaptive as a function of a parameter of value of the dry friction S, and the ideal motion signal Ym and the motion measurement signal Y are intercompared to produce an error signal ε( ), and the value of the dry friction S is estimated in an estimator receiving as input the error signal ε( ) and producing as output the estimation S of value of the dry friction, and said estimation S is dispatched as parameter of value of the dry friction in the dry friction compensation control law so as to correct the control signal.
G05B 19/19 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
57.
MASTER MODEL HAVING A COMPLEX SHAPE, AND KIT FOR PRODUCING SAME
The invention concerns a master model (1) defining a useful surface having a complex shape, comprising a set of juxtaposed frames (2a, 2b, 2c.), each frame comprising a panel having a useful edge (8), the frames being disposed parallel and held rigidly connected with predefined spacings such that the useful edges of same form the useful surface. The panel of each frame comprises a blind slot (10) forming an opening passing through the thickness, and the frames are rigidly connected by a spar (3, 3a, 3b, etc.) suitable for being inserted (6) in the lengthwise direction (L) of same into the slots and comprising transverse notches (11) for receiving and holding the frames, each notch being arranged to receive, by a relative transverse translational movement (7) of the spar relative to the frames, the part in question of the panel of each frame.
The invention relates to an optical fibre interferometric system comprising a light source (1), a coil of optical fibre (8), a coil separator (3), a photodetector (2), and polarisation filtering means. According to the invention, the polarisation filtering means comprise a first waveguide polariser (51), at least one second thin-section polariser (52) and an optical waveguide section (12), the at least one other polariser (52) being disposed in the Rayleigh zone between a first waveguide end (21) of the first polariser (51) and a second waveguide end (22) of the optical waveguide section (12).
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G02B 6/30 - Optical coupling means for use between fibre and thin-film device
G02B 6/126 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind using polarisation effects
G02B 6/27 - Optical coupling means with polarisation selective and adjusting means
The invention relates to a polarising optical device with waveguide, comprising a first waveguide polariser (6), a section of a second optical waveguide (31) and a second thin-section polariser (52) having a physical thickness T and a refractive index n, said second thin-section polariser (52) being disposed on the optical path between a waveguide end (8) of the first polariser (6) and one end (32) of the second optical waveguide (31), the physical distance d between the waveguide end (8) of the first polariser (6) and the end (32) of the second optical waveguide (31) being less than or equal to twice the Rayleigh length and the physical thickness T of the second polariser (52) being less than or equal to the physical distance d.
G02B 6/126 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind using polarisation effects
60.
SYSTEM COMPRISING A DEAD WEIGHT AND EQUIPMENT ON A TROLLING LINE HAVING AUTOMATED RELEASES AND RETRIEVALS AND IMPLEMENTATION METHOD
A system (1) comprising a dead weight (3) and equipment (4) on a trolling line (6) that is released from and retrieved to a receiving structure (2) of a seagoing vessel, in which the dead weight comprises a controllable means (17) for blocking and unblocking the line, so as to immobilise the line relative to the dead weight in the blocked configuration, and to allow the line to run relative to the dead weight in the unblocked configuration, the system comprising a first detection means (14a) for detecting whether or not the equipment has moved to a predefined distance from the dead weight, the system comprising a control means configured, in case of an order to release: - in a step 2L, to release the equipment from the receiving structure, by unreeling the line, - in a step 3L, when the first detection means detects that the equipment has moved to the predefined distance from the dead weight, to then release said dead weight and control the blocking and unblocking means to shift to the blocked configuration, while continuing to unwind the line, the line then being immobilised relative to the dead weight, and, - in a step 4L, to stop the unwinding of the line when the unreeling of the line has allowed the desired length to be obtained; the system also comprising a second detection means (17c). A method is also provided.
The present invention relates to an interferometric measurement device (100) comprising a light source (110) emitting a source signal and optical coupling means (121) receiving the source signal, directing a part of the latter towards a measurement pathway (102) comprising a Sagnac ring interferometer (141), of natural frequency fp, producing, as output, an output power output signal Ρoυτ polarized according to a first direction of polarization, tapping off another part of the source signal towards a compensation pathway (103) producing a return power compensation signal PRET, and directing the output signal and the compensation signal towards detection means. According to the invention, the compensation pathway comprises polarization rotation means (131) producing the compensation signal according to a second cross-direction of polarization, and optical looping means (132) redirecting a part of the compensation signal towards the measurement pathway; the detection means comprise a single detector (150) connected to the coupling means so as to receive the output signal and the compensation signal; the device furthermore comprises power equilibration means (132) equalizing the output power and/or the return power that are routed towards the detector, and the compensation pathway exhibits a length adjusted so that the output signal exhibits, with respect to the compensation signal, a time delay x equal to 1 /(2*fp) at the level of the detector.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
62.
INTERFEROMETRIC SYSTEM WITH MULTIAXIAL OPTICAL FIBRE AND METHOD FOR PROCESSING AN INTERFEROMETRIC SIGNAL IN SUCH A SYSTEM
The present invention relates to an interferometric system with multiaxial optical fibre and a method for processing an interferometric signal in such a system. In particular, the invention relates to a multiaxial interferometric system comprising a light source (1); a plurality of N coils of optical fibre (11, 12), a first optical separation means (3) capable of splitting the source beam (100) into a first split beam (140) and a second split beam (240); shared phase-modulation means (4); a photodetector (2) and a signal-processing system (800). According to the invention, the N coils of optical fibre (11, 12) are connected in parallel, the coils having respective transit times T1, T2, … TN that all differ from one another, and the signal-processing system (800) is capable of processing the detected interferometric signal (720) by the shared photodetector (2) in accordance with the respective transit times in the various coils.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
63.
METROLOGY METHOD AND DEVICE FOR CALIBRATING THE GEOMETRY OF A NETWORK OF UNDERWATER ACOUSTIC BEACONS
The invention relates to a metrology method and device for calibrating the geometry of a network of Nb stationary underwater acoustic beacons (11, 12, 13, 14) defining a field of beacons, implementing a moving body (20) comprising means for receiving acoustic signals from each of the beacons of the network, respectively. According to the invention, the metrology method includes the following steps: acquiring Nm series of Nb acoustic measurements of the relative distance between the moving body and each beacon of the network, respectively, during a movement of the moving body; calculating a numeric function C from the series of acoustic measurements of the relative distances and parameters representing relative positions of the beacons; executing an algorithm for minimising the numeric function C in order to deduce therefrom an estimation of the values of the relative position parameters of each of the beacons of the network.
G01S 7/52 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
64.
FIBRE-OPTIC INTERFEROMETRIC MEASUREMENT DEVICE COMPRISING A RING RESONATOR, GYROMETER AND INERTIAL ATTITUDE OR NAVIGATION UNIT COMPRISING SUCH A DEVICE
The invention concerns a fibre-optic interferometric measurement device (100) intended to measure a physical parameter (QR) and comprising: - a wide-spectrum light source (103), - a SAGNAC fibre-optic interferometer (110), in which there propagate two counter-propagating light waves (101, 102) comprising measurement means (1140) sensitive to the physical parameter that results in a non-reciprocal phase difference Δφρ between the two light waves, and - a detector (104) delivering an electric signal representative of the physical parameter. According to the invention, the measurement means comprise a ring resonator (1143) in transmission mode comprising a first coupler (1141) and a second coupler (1142) respectively, which couple a first arm (111) and a second arm (112) respectively of the SAGNAC interferometer to said ring resonator, in such a way that the two light waves travel in opposing directions of travel (1143H, 1143AH).
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
65.
METHOD FOR ACTIVE NARROW-BAND ACOUSTIC CONTROL WITH VARIABLE TRANSFER FUNCTION(S), AND CORRESPONDING SYSTEM
The invention relates to an active acoustic control method for attenuating disturbing narrow-band noise with at least one counter-noise loudspeaker and at least one error microphone in a space forming a material electroacoustic system, said method implementing, in a computing means, a control law with an internal model and disturbance observer with a model of the electroacoustic system, previously obtained by an identification method. According to the invention, the current configuration of the electroacoustic system can vary over time, and a nominal configuration of said electroacoustic system is previously determined and a corresponding nominal model M0 (q -1) or M0 (k) is previously identified, and the control law with an internal model and disturbance observer is implemented in real time, wherein a modifier block Δ (q-1) or Δ (k) which is applied to said nominal model is associated with the nominal model, and the nominal model remains the same during the variations of the current configuration of the electroacoustic system, and the modifier block is varied in real time during the variations of the current configuration of the electroacoustic system in order to adapt, in real time, the control law with an internal model to the current configuration of the electroacoustic system, the current model, formula (I) or formula (II), of the current configuration of the system being considered equal to the nominal model M0 (q-1) or M0 (k) to which the modifier block A(q-1) or A(k) is applied.
G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
66.
METHOD FOR THE ACTIVE ACOUSTIC CONTROL OF NARROW-BAND DISTURBING NOISE WITH ONE OR MORE MOBILE MICROPHONES, AND CORRESPONDING SYSTEM
The invention relates to a method for the active acoustic control of narrow-band disturbing noise with one or more mobile microphones, intended for the real-time attenuation, or even suppression, of the disturbing noise in a controlled zone (9) of a work space (1), by generation of at least one counter-noise by a sound generating means (3) controlled by a control signal U(t) produced at the output of a computing means receiving as input at least one measurement signal Y(t) originating from an acoustic sensor (6). The computing means uses a corrector (11) obtained on the basis of an acoustic model produced following a first prior identification step and a second prior corrector (11) synthesis step, with at least the corrector being stored in the computing means for use in real time in a third step for the real-time attenuation or suppression of the disturbing noise. According to the invention, the zone (9) to be controlled and the at least one acoustic sensor (6) may move over time inside the work space (1). In addition, identification points (8) (... Pj...) are previously determined in the work space (1). In the first step, the acoustic model is identified for each identification point (8). In the second step, the corresponding corrector (11) is synthesised for each model. In the third step, selection means (12) are employed in real time to select at least one of the stored correctors (11) for the production of the control signal U(t) in order at least to attenuate said disturbing noise.
G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
67.
INTERFEROMETRIC MEASUREMENT DEVICE COMPRISING A FILTERING INTERFEROMETER
An interferometric measurement device (10) comprising a broad-spectrum spontaneous emission light source (1), a measurement interferometer (2), receiving as input a light signal (2A) with luminous intensity at input Ρin and delivering as output a modulated light signal (2B) with luminous intensity at output Pout, said modulated signal being modulated to a modulation frequency fm depending on a physical parameter (ΩR) to be measured and being proportional to the luminous intensity at input Pin; an optical radiation detector (3), receiving the modulated light signal exiting said measurement interferometer and delivering a modulated electrical signal (3A) representative of said luminous intensity at output Pout, said interferometric measurement device being characterized in that it comprises a filtering interferometer (100), insensitive to said physical parameter to be measured and placed between said light source and said measurement interferometer or between said measurement interferometer and the optical radiation detector, having a free spectrum interval ISL and an accuracy F selected such that an interval of frequencies (INT1, INT2, INT3), centred around an optimal frequency foptim equal to (2k+1 ) ISL/2, k being a natural whole number, and with width Δf equal to [0.9-(3/2F)] ISL, comprises the modulation frequency fm of the modulated light signal at the output of the measurement interferometer.
The invention relates to a system and a method for the navigation of a movable vehicle, suitable for determining and displaying a safe navigation zone for the movable vehicle. The navigation system comprises a dead reckoning navigation system, (10), a calculator (50), a storage memory (60), an on-board sensor (20), and an electronic mapping system (70). According to the invention, the calculator (50) is suitable for calculating an estimated position of the movable vehicle from speed and/or acceleration measurements and a comparison of the measurement of an environmental parameter with a geographical database. The calculator (50) is suitable for calculating the probability density of the presence of the movable vehicle around each point on the map in order to deduce a safe zone (12) corresponding to a presence probability higher than, or equal to, a pre-determined threshold p.
G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
69.
INTERFEROMETRIC MEASUREMENT SYSTEM WITH OPTICAL FIBRE AND INERTIAL GUIDANCE OR NAVIGATION SYSTEM INCLUDING SUCH AN INTERFEROMETRIC MEASUREMENT SYSTEM
The present invention relates to an optical fibre interferometric measurement system with comprising a light source; a first optical transmission means and a second optical transmission means; first and second Sagnac-ring interferometers, respectively, comprising first and second coils of optical fibre, and ,respectively, having the lengths of L1 and L2,; and first and second individual integrated optical circuits, respectively, connected to the first and second optical transmission means, as well as to the two ends of the first and second coils of optical fibre, respectively. According to the invention, the interferometric system comprises a multiple integrated optical circuit integrating, on a single substrate, the first individual integrated optical circuit and the second individual integrated optical circuit, and the difference M between the optical length Δl of the first optical transmission means and the optical length l1 of the second optical transmission means is higher than the maximum of ΔNb1 x L1 and ΔNb2 x L2, in which ΔNb1 and ΔNb2, respectively, are the difference in the group birefringence index of the first and second coils of optical fibre, respectively.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
70.
FIBRE-OPTIC MEASUREMENT DEVICE, RATE GYRO, AND INERTIAL STABILISATION AND NAVIGATION UNIT
The invention relates to a fibre-optic measurement device (10) comprising a SAGNAC ring interferometer (20) having its own frequency fp, a detector (14) and a modulation chain (30) generating a phase-shift modulation ϕm(t) between the two counter-propagating waves (24, 25) propagating in the ring interferometer. The invention aims to reduce measurement faults due to the linearity defects in the modulation chain of such a measurement device with optical fibre. For said reason, the invention provides a fibre-optic measurement device reducing the amplitude of the phase-shift modulation ϕm(t) which is the sum of a first biasing phase-shift modulation component ϕb1(t) and a first counter-reaction phase-shift modulation component ϕcr1(t), said phase-shift modulation ϕm(t) falling or rising by twice the amplitude of the first biasing phase-shift modulation component ϕb1(t). The invention also relates to a rate gyro comprising such a measurement device and to an inertial stabilisation or navigation unit including at least one such rate gyro.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
71.
FIBER-OPTIC MEASUREMENT DEVICE, GYROMETER, AND NAVIGATION AND INERTIAL-STABILIZATION SYSTEM
The invention relates to a fiber-optic measurement device (10) comprising a SAGNAC ring interferometer (10) having a natural frequency fp. The aim of the invention is to improve response time while maintaining high precision across the measurement range. To this end, biasing means (130) are used to produce: a first biasing phase-differential modulation component ΔΦb1(t) (34), which is periodic in time-slots, having levels +π and -π, at a first biasing modulation frequency fb1 such that fb1 = (2k1+1) fp, k1 being a natural number; and a second periodic biasing phase-differential modulation component A(|)b2(t) (35), having extreme amplitudes +π/a and -π/a, a being a non-zero real number such that | a | > 1, at a second biasing modulation frequency fb2 such that fb2 = (2k2+1) fp, k2 being a non-zero natural number such that k2 > k1. The invention also relates to a gyrometer comprising such a measurement device and a navigation or inertial-stabilization system comprising at least one such gyrometer.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
72.
INTEGRATED OPTICAL CIRCUIT WITH TRAVERSING ATTENTUATION ZONE
The present invention relates to an integrated optical circuit comprising an optically transparent substrate (10), said substrate comprising: an input face (1), an output face (2), an upper face (3) and a lower face (4), the upper face and the lower face extending between the input face and the output face; at least one optical waveguide (6), said optical waveguide comprising at least one first end (7) situated on the input face of the substrate and a second end (7) situated on the output face of the substrate; and at least one optical attenuation zone (18, 18a, 18b, 18c, 18d) able to attenuate an optical signal transmitted via the substrate to the outside of the waveguide. According to the invention, the waveguide exhibits a nonrectilinear optical path between the first end and the second end, said at least one attenuation zone extends from the upper face to the lower face of the substrate, and said attenuation zone being positioned on a straight line segment joining the first end and the second end of the optical waveguide, the waveguide and the attenuation zone having respective dimensions such that the attenuation zone does not cut the waveguide.
G02B 6/126 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind using polarisation effects
73.
GUIDED OPTICAL ROUTER, FIBRE-OPTIC INTERFEROMETER INTEGRATING SUCH AN OPTICAL ROUTER AND METHOD OF GUIDED OPTICAL ROUTING
The present invention relates to a bidirectional guided optical router comprising an evanescent-field optical coupler having three input gates, three output gates, a first central waveguide, a second lateral waveguide and a third lateral waveguide and an evanescent-field-based optical coupling zone in which said first, second and third waveguides are disposed in such a way as to allow evanescent-field-based coupling between the first central waveguide and either one of the second and third lateral waveguides. According to the invention, said 3x3 optical coupler has a length L of between 3154 x Leq and 2 x Leq in such a way that an optical beam coupled on the first input gate having a power p and propagating on the first waveguide in the forward direction is distributed according to the following distribution: a first secondary beam having a power greater than or equal to 90% of p/2 on the second output gate, another secondary beam having a same power greater than or equal to 90% of p/2 on the third output gate.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G02B 6/12 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
The present invention relates to an acoustic positioning device comprising acoustic emission means (B1) and acoustic reception means (B2), the device being configured so as to emit a sequence of at least one first acoustic signal S1 and one second acoustic signal S2, separated by a time interval T, and to receive and measure the arrival phase φ1 of S1 and the arrival phase φ2 of S2. According to the invention, the device comprises means for measuring a relative displacement between the acoustic emission means (B1) and the acoustic reception means (B2) comprising means for determining a value of the approximate difference (R2-R1)AUX between, on the one hand the distance R1 travelled by the first acoustic signal S1 between the acoustic emission means and the acoustic reception means, and on the other hand the distance R2 travelled by the second acoustic signal S2 between the acoustic emission means and the acoustic reception means, and means for calculating the relative displacement (R2-R1) between said acoustic emission means and said acoustic reception means as a function of the approximate difference (R2-R1)AUX, of the time interval T and of the arrival phases φ1, φ2 respectively of the first acoustic signal S1 and of the second acoustic signal S2.
G01S 1/76 - Systems for determining direction or position line
G01S 1/80 - Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional transducers or transducer systems spaced apart, i.e. path-difference systems
G01S 5/22 - Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
75.
SYSTEM FOR STABILIZING A POSITIONER WITH MOTORIZED AXES OF AN ITEM OF EQUIPMENT, METHOD AND APPLICATION
The invention relates to a system for stabilizing a positioner of an item of equipment, the positioner being oriented under the action of an orientation command, said positioner being installed on a vehicle undergoing motions, the positioner comprising angular coders producing angular measurements (θρ, θt) and a set of gyrometric sensors producing measurements of rates of instantaneous rotation (my, mz), said gyrometric sensors exhibiting biases, the positioner comprising a calculation unit with means of intra-positioner slaving-correction of the instantaneous rates of rotation of the item of equipment using measurements and the orientation command to stabilize the item of equipment along the line of sight. The vehicle comprises a means for measuring the attitude of the vehicle giving vehicle attitude measurements. The system furthermore comprises means of calculation for controlling the positioner according to a control law making it possible to correct the biases (Py, Pz) by virtue of the vehicle attitude information and by implementing a state observer combining an estimation of attitude of an item of equipment (q) and the measurements of rates of rotation of an item of equipment (my, mz) so as to determine the biases and to correct them within the control law, the estimation of attitude of an item of equipment (q) being obtained on the basis of the measurements of vehicle attitude (Ψ, θ, Φ) and of angular measurements (θρ, θt) of the controlled positioning axes of the positioner.
The present invention relates to a submersible electro‑acoustic transducer that can be immersed in an immersion fluid for underwater acoustic communication or for underwater acoustic tomography, said transducer comprising two horns, a counterweight, two electro‑acoustic motors, placed on either side of the counterweight, said motors being aligned along an axis of symmetry, the opposite ends of said motors being linked respectively to a horn, the assembly constituted by said electro‑acoustic motors, said counterweight and said horns being able to generate a longitudinal electro‑acoustic mode of resonance. According to the invention, said transducer comprises a rigid and hollow cylindrical piece extending around said counterweight, said cylindrical piece having an axis coinciding with the axis of symmetry of the transducer, the interior of said cylindrical piece forming a fluid cavity able to be filled by said immersion fluid, said electro‑acoustic motors and said cylindrical piece being dimensioned so that said fluid cavity forms an acoustic coupling between said longitudinal electro‑acoustic mode of resonance of said transducer and a circumferential mode of resonance of said cylindrical piece when said fluid cavity is filled with said immersion fluid.
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
77.
METHOD AND DEVICE FOR ACTIVE CONTROL OF MECHANICAL VIBRATIONS BY IMPLEMENTATION OF A CONTROLLER CONSISTING OF A CENTRAL CORRECTOR AND A YOULA PARAMETER
The invention relates to a method and a device which are based on the application of an active correcting system with central corrector and Youla parameter for the attenuation of essentially monofrequency mechanical vibratory perturbations generated in a material structure by a rotating machine. Previously, a correction controller corresponding to a block modelling of the system is established and calculated, said blocks being, on the one hand, those of the central corrector and, on the other hand, a Youla parameter block, the modelling being such that only the Youla parameter, in the form of an infinite impulse response filter, has coefficients dependent on the vibratory perturbation frequency. During a phase of use, in real time, the frequency of the current perturbation is determined and the correction controller is calculated using for the Youla parameter the stored coefficients of a determined perturbation frequency corresponding to the current perturbation frequency.
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
F16F 15/10 - Suppression of vibrations in rotating systems by making use of members moving with the system
78.
APOLARIZED INTERFEROMETRIC SYSTEM, AND APOLARIZED INTERFEROMETRIC MEASUREMENT SYSTEM
The present invention relates to an interferometric system which includes a polarization separation means (10), a first polarization conversion means (11), a Mach-Zehnder interferometer (2) including a first (4) and second (5) arm connected to one another by a first (6) and second (7) end in order for a first and second beam (20, 21) having the same polarization to pass through the interferometer in a reciprocal manner in opposite directions of propagation, respectively, so as to form a first and second interferometric beam (22, 23), a second polarization conversion means (11) for obtaining an interferometric beam (24), the polarization of which is converted, a polarization-combining means (10), and a detection means (8) suitable for detecting an output beam (25).
G01J 9/02 - Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
79.
INTERFEROMETER WITH A FIBER OPTIC HAVING A HIGH PMD IN COUPLED MODE, FIBER OPTIC GYROSCOPE (FOG), AND INERTIAL NAVIGATION SYSTEM INCLUDING SUCH A GYROSCOPE
The invention relates to a fiber optic interferometer including: a wideband optical source (1) having a decoherence time t DC; a coil comprising N turns of a fiber optic (5) with a length L; optical means capable of separating the incident beam into first and second beams coupled to first and second ends of the fiber (5) respectively, such that the first beam travels through the fiber optic in a first direction and the second beam travels through the fiber optic in a counterpropagating direction; and a detector (6) capable of detecting the intensity of the output beam. According to the invention, the fiber optic is a high polarization mode dispersion fiber optic, and the length L of the fiber optic coil is more than twice the fiber correlation length, L > 2.L c, such that the fiber operates in a coupled PMD mode, and the propagation differential group delay (DGD) between two orthogonal polarization states, accumulated over the length L of the fiber, is greater than the decoherence time of the source, DGD > t DC.
G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
80.
FIBER BRAGG GRATING HYDROPHONE COMPRISING A DIAPHRAGM AMPLIFIER
The invention relates to a fiber Bragg grating hydrophone including a fluid chamber (1) and an optical fiber (2) in which a Bragg grating (3) is integrated, the optical fiber (2) extending through the fluid chamber (1) such that the Bragg grating (3) is positioned inside the latter. According to the invention, the fluid chamber (1) is filled with a compressible fluid and is defined by a rigid casing (4) including two end surfaces (28a, 28b) that are rigidly connected to the optical fiber (2). At least one of the two end surfaces (28a, 28b) of the rigid casing (4) includes an opening (5a, 5b) closed by a deformable diaphragm (6a, 6b) that is rigidly connected to said optical fiber (2) and that can be deformed in reaction to a difference in the pressures applied to the surfaces thereof, thereby modifying the length of the optical fiber (2) as measured by a variation in the wavelength of a luminous flux extracted from the optical fiber (2).
The invention relates to a Bragg grating fiber hydrophone, including a fluid chamber (2) and an optical fiber (2) in which a Bragg grating (3) is integrated, said optical fiber (2) passing through said fluid chamber (1) along a longitudinal axis (X) and such that the Bragg grating (3) is positioned inside the latter. According to the invention, the fluid chamber (1) is filled with a compressible fluid and is defined by a casing (4) comprising two ends (5a, 5b) connected to the optical fiber (2), and the casing (4) includes at least one portion formed by an extensible and compressible tube (6a, 6b) extending along the longitudinal axis (X). The portion formed by an extensible and compressible tube (6a, 6b) includes an outer end coinciding with one of the two casing ends (5a, 5b) and can be longitudinally deformed by a difference in the pressures applied on the walls thereof, which results in a variation of the length of the optical fiber (2) as measured by a variation in the wavelength of a luminous flux extracted from the optical fiber (2).
The invention relates to an acoustic wave transducer that includes at least one electroacoustic motor (1, 21), a flare (4, 24) having an inner wall and an outer wall, a counterweight (5), and a hollow housing (8, 28) having an inner wall and an outer wall and at least one acoustic opening. The electroacoustic motor is connected to the flare (4, 24) as well as to the counterweight (5) along an axis (7), and said electroacoustic motor (1, 21) is capable of exciting the flare at about at least one resonance frequency f. The housing (8, 28) is connected to the counterweight (5) and surrounds the motor (1, 21) and the flare (4, 24), the outer wall of the flare being arranged opposite an acoustic opening of the housing, and the space between the inner wall of the housing and the inner wall of the flare defines a cavity that contains a fluid. According to the invention, said transducer includes acoustic attenuation means connected to the outer wall of the housing in order to attenuate the transmission and/or reception acoustic waves at the frequency f at least in a direction transverse to the transmission/reception axis. The invention also relates to a sonar antenna that comprises at least one transducer according to the invention.
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
patents
