A condition monitoring device for a lightning protection system (LPS) of a wind turbine blade, wherein the condition monitoring device is mountable to a wind turbine. The device includes, a signal generation unit configured to generate and input probe signals into a protection unit of the LPS and/or to at least one tower conducting unit. The device includes a measurement unit configured to detect response signals, which are a system response of the probe signals via a wireless coupling between the LPS and the tower conducting unit. A control unit is configured to control the signal unit and the measurement unit and to process the response signals.
Embodiments according to the invention describe a method for monitoring the state of the powertrain or tower of a wind turbine (10), said method having the steps of: detecting data of a state monitoring system which is provided for a structure of the wind turbine (10), said structure being mechanically coupled to the powertrain or tower; processing the detected data of the state monitoring system which is provided for the structure of the wind turbine (10), said structure being mechanically coupled to the powertrain or tower; and determining the state of the powertrain or tower from the processed data of the state monitoring system which is provided for the structure of the wind turbine (10), said structure being mechanically coupled to the powertrain or tower.
A method for monitoring a wind turbine (10) is disclosed. The method comprises: collecting data that is associated with an abnormal behaviour of the wind turbine; comparing the collected data with anonymized data from other wind turbines; matching a fault condition with the abnormal behaviour through the comparison; and outputting the fault condition to the wind turbine.
A method (300) for the control of a wind farm (10) is disclosed. The method (300) comprises: read-in of data from at least one first wind power plant (200) of the wind farm; supply of the read-in data from the at least one first wind power plant to a statistical prediction model for the control of at least one second wind power plant (200) of the wind farm based on the read-in data from the at least one first wind power plant; and use of the statistical prediction model to control the at least one second wind power plant (200).
The invention relates to a sensor arrangement for use on a wind turbine. The sensor arrangement comprises a rotor blade-related sensor, which is arranged in/on a rotor blade, and a non-rotor blade-related sensor, wherein the sensor signals, which are associated with the rotor blade-related sensor, are processed by fusion with the sensor signals which are associated with the non-rotor blade-related sensor. The invention also relates to a method for operating a wind turbine.
The invention relates to a method (300) for controlling a wind farm (10). The method (300) has the steps of: reading data from at least one first wind turbine (200) of the wind farm; supplying the read data of the at least one first wind turbine to a statistical prediction model for controlling at least one second wind turbine (200) of the wind farm on the basis of the read data of the at least one first wind turbine; and using the statistical prediction model in order to control the at least one second wind turbine (200).
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
G05B 13/04 - Systèmes de commande adaptatifs, c.-à-d. systèmes se réglant eux-mêmes automatiquement pour obtenir un rendement optimal suivant un critère prédéterminé électriques impliquant l'usage de modèles ou de simulateurs
H02J 13/00 - Circuits pour pourvoir à l'indication à distance des conditions d'un réseau, p. ex. un enregistrement instantané des conditions d'ouverture ou de fermeture de chaque sectionneur du réseauCircuits pour pourvoir à la commande à distance des moyens de commutation dans un réseau de distribution d'énergie, p. ex. mise en ou hors circuit de consommateurs de courant par l'utilisation de signaux d'impulsion codés transmis par le réseau
The invention relates to a method by means of which a system that is capable of oscillating can be monitored. The method comprises detection of natural oscillation modes of the system that can oscillate as a function of at least one operating parameter and/or as a function of at least one environmental parameter of the system that is capable of oscillating, creation of a frequency distribution of the detected natural oscillating modes, division of the natural oscillating modes into frequency classes and, in at least one frequency class, determination of a mode profile over the operating parameter and/or over the environmental parameter.
The invention relates to an optoelectronic chip comprising the following elements: a light inlet; a wavelength-sensitive optical filter; a first photoelectric element for measuring a first light intensity, particularly a first photodiode, the first photoelectric element being arranged such that light penetrating the optoelectronic chip via the light inlet, transmitted by the filter, hits the first photoelectric element; and a second photoelectric element for measuring a second light intensity, particularly a second photodiode, the second photoelectric element being arranged such that the light penetrating the optoelectronic chip via the light inlet, which is reflected by the filter, hits the second photoelectric element.
G01N 21/25 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes
G01J 9/02 - Mesure du déphasage des rayons lumineuxRecherche du degré de cohérenceMesure de la longueur d'onde des rayons lumineux par des méthodes interférométriques
G01J 3/26 - Production du spectreMonochromateurs en utilisant une réflexion multiple, p. ex. interféromètre de Fabry-Perot, filtre à interférences variables
The invention relates to an acoustic emission sensor (100). The acoustic emission sensor comprises an optical resonator (10) having a sensor region (11) configured for reflective operation; an optical waveguide (20) which is optically coupled to the optical resonator (10); a light source (31) which is optically coupled to the optical waveguide (20) to apply light to the optical waveguide (20); and a detection device (32) which is optically coupled to the optical waveguide (20) to detect light from the optical resonator (10). The sensor region (11) of the optical resonator (10) comprises a coupling device (50) for mechanically coupling to a solid measurement object (200). The coupling device (50) comprises a first coupling element (51) for transmitting an acoustic emission signal between the sensor region (11) and the solid measurement object (200), and at least one second coupling element (52). The second coupling element (52) is configured to position the coupling device (50) on the solid measurement object (200), and/or the second coupling element (52) acts as a filter for the acoustic emission signal.
G01N 29/14 - Recherche ou analyse des matériaux par l'emploi d'ondes ultrasonores, sonores ou infrasonoresVisualisation de l'intérieur d'objets par transmission d'ondes ultrasonores ou sonores à travers l'objet utilisant des techniques d'émission acoustique
G01H 9/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores en utilisant des moyens sensibles aux radiations, p. ex. des moyens optiques
G02B 6/32 - Moyens de couplage optique ayant des moyens de focalisation par lentilles
The invention relates to a device for detecting acceleration. The device contains: a frame; a mass; a lever arm connected to the mass, wherein the mass is provided at a first lever position; an optical fiber having a fiber-optic sensor; and a compensation element for disturbance variables, wherein the compensation element for disturbance variables is connected to the lever arm or the mass and wherein the compensation element for disturbance variables is connected to the frame.
G01P 15/093 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération en ayant recours aux forces d'inertie avec conversion en valeurs électriques ou magnétiques au moyen de capteurs photo-électriques
G01H 9/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores en utilisant des moyens sensibles aux radiations, p. ex. des moyens optiques
G01P 15/18 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération dans plusieurs dimensions
G01P 15/08 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération en ayant recours aux forces d'inertie avec conversion en valeurs électriques ou magnétiques
11.
Determining a blade bending moment with two load sensors per rotor blade and taking rotor data into consideration
The invention relates to an assembly for monitoring and/or controlling a wind turbine. The assembly includes a first strain sensor for measuring a first blade bending moment of a rotor blade of a wind turbine in a first spatial direction; a second strain sensor for measuring a second blade bending moment of a rotor blade of a wind turbine in a second spatial direction, which differs from the first spatial direction; an arrangement for determining constant components of forces and moments of the rotor blades provided in the wind turbine; and a controller for combining the first blade bending moment, the second blade bending moment and the constant components.
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p. ex. indicateur optique de déformation
12.
Method for increasing the yield of a wind farm under icing conditions
The invention relates to a method for monitoring a wind farm. The method includes determining a first ice mass on a first wind turbine of the wind farm; determining at least one second ice mass on at least one second wind turbine of the wind farm; comparing a first ice mass with a second ice mass and determining a primary wind turbine, which serves as a reference, and at least one secondary wind turbine from the group of the first wind turbine and the at least one second wind turbine; switching off the at least one secondary wind turbine on the basis of a first ice mass from the primary wind turbine; and switching on the at least one secondary wind turbine on the basis of a second ice mass from the primary wind turbine.
F03D 80/40 - Détection de givreMoyens de dégivrage
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
13.
IMPROVING OR OPTIMIZING WIND TURBINE OUTPUT BY DETECTING FLOW DETACHMENT
The present document describes a method for controlling a wind turbine. The method involves measuring noise emission by means of at least one pressure sensor attached to the rotor blade; recognising a characteristic aeroacoustic sound for at least one flow detachment on the basis of the noise emission; and controlling, in open- or closed-loop fashion, one or more components of the wind turbine on the basis of the recognition of the characteristic aeroacoustic sound of the flow detachment.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
14.
STRAIN AND VIBRATION MEASURING SYSTEM FOR MONITORING ROTOR BLADES
The invention relates to an assembly for monitoring and/or controlling a wind turbine. The assembly for monitoring and/or controlling a wind turbine comprises: an arrangement of two strain sensors, in particular three strain sensors, which detects blade bending moments of a rotor blade of a wind turbine in at least two different spatial directions; a first fibre optic vibration sensor for detecting vibrations of the rotor blade in a first spatial direction; and at least one second fibre optic vibration sensor for detecting vibrations of the rotor in a second spatial direction, which differs from the first spatial direction.
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
G01M 5/00 - Examen de l'élasticité des structures ou ouvrages, p. ex. fléchissement de ponts ou d'ailes d'avions
15.
Apparatus and method for measuring the torsion of a test object
The invention discloses an apparatus for measuring the torsion between a first point (41) and a second point (42) of a test object (1), said second point being spaced apart from the first point. The apparatus comprises the following: a source of polarized light, comprising a polarizing light source (15) that emits polarized light, or a polarizer (20) that is connected to a light source (10) by way of an optical feed; a first optical fibre (40) that is optically connected to the Output of the polarizing light source (15) or to the Output of the polarizer (20) and that is fastened to the test object (1) at the first point (41) and at the second point (42) in such a way that a torsion of the test object about a torsion axis causes a change in the angle of rotation of the first optical fibre from the first point in relation to the second point, and a second polarization-maintaining optical fibre (50), that is connected to the first optical fibre (40) at the second point (42) or downstream of the second point (42) in relation to the light path Coming from the source, for supplying the light to a measuring device (30, 31), wherein the distance between the first point (41) and the second point (42) of the test object (1) is greater than or equal to 5 metres, or greater than or equal to 7 metres, or greater than or equal to 10 metres, and the first optical fibre (40) comprises a non-polarization-maintaining, bending-insensitive fibre.
G01B 11/26 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des angles ou des cônesDispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour tester l'alignement des axes
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p. ex. indicateur optique de déformation
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
The invention relates to a method by means of which a system that is capable of oscillating can be monitored. The method comprises detection of natural oscillation modes of the system that can oscillate as a function of at least one operating parameter and/or as a function of at least one environmental parameter of the system that is capable of oscillating, creation of a frequency distribution of the detected natural oscillating modes, division of the natural oscillating modes into frequency classes and, in at least one frequency class, determination of a mode profile over the operating parameter and/or over the environmental parameter.
The invention relates to a method (200) for monitoring a status of at least one wind turbine. The method (200) comprises: detecting first measurement signals via one or more sensors (210), wherein the first measurement signals provide one or more parameters relating to at least one rotor blade of the at least one wind turbine in a normal status; training a trainable algorithm based on the first measurement signals of the normal status (220); detecting second measurement signals via the one or more sensors (230); and recognising an undetermined anomaly via the trainable algorithm trained in the normal status, if a current status of the wind turbine, determined based on the second measurement signals, deviates from the normal status (240).
Embodiments describe a method for predicting the accumulation of ice on a rotor blade (111, 112) of a wind turbine (100) and the use thereof. The method comprises defining an upper threshold value (So) and/or a lower threshold value (Su) for a system variable (S) which is associated with the mass of the rotor blade (111, 112) and/or with the mass of an ice attachment (1) of the rotor blade (111, 112); acquiring system variable data during an acquisition time period (T); carrying out a compensation calculation of the curve profile for a prediction time period (Δt1′, Δt2′, Δt3′) from the system variable data which were acquired during a partial time period (Δt1, Δt2, Δt3) of the acquisition time period (T) in order to obtain a prediction curve (N1, N2, N3); carrying out at least one further compensation calculation of the curve profile for a further prediction time period (Δt1′, Δt2′, Δt3′) from the system variable data which were acquired during another partial time period (Δt1, Δt2, Δt3) of the acquisition time period (T) in order to obtain a further prediction curve (N1, N2, N3); determining whether or not the upper threshold value (So) will be exceeded by one or more of the prediction curves (N1, N2, N3) in future and/or whether the lower threshold value (Su) will not be undershot by one or more of the prediction curves (N1, N2, N3) in the future; and outputting the result of the determination; and outputting the result of the determination.
Embodiments of the invention describe a method for ascertaining a value of an ice buildup quantity on at least one rotor blade (111, 112) of a wind turbine (100) and to the use thereof. The method has the steps of ascertaining a base value (G) for at least one natural frequency of the rotor blade when vibrations are excited in an ice buildup-free state; ascertaining a shift base factor for shifting the at least one natural frequency relative to the ice buildup-free state in the event of an ice buildup quantity which is increased by a specific value; detecting a measurement value or a measurement value curve of a measurement variable which is suitable for determining the current natural frequency of the rotor blade (111, 112); determining the current natural frequencies of the rotor blade (111, 112); and deriving a current shift factor by comparing the current natural frequencies with the base value (G), comparing the current shift factor with the shift base factor, and deriving a value for the ice buildup quantity using the comparison.
A clamping device (300) for a light guide (112) is provided. The clamping device (300) includes a carrier structure having a first securing element (301) for securing the light guide (112) in a first position (401), and a second securing element (302) at a distance from the first securing element (301) for securing the light guide (112) in a second position (402), wherein the first and second positions (401, 402) have a first distance (403) in a longitudinal extension of the light guide (112). Further, an intermediate carrier (500) having a first surface (503) on which the first and second securing elements (301, 302) are attached in respective securing positions (501, 502), and an opposing second surface (504), which can be applied to a measurement object, is provided. Hereby, a second distance (505) of the securing positions (501, 502) of the securing elements (301, 302) on the intermediate carrier (500) is greater than the first distance (403) in a longitudinal direction of the light guide (112).
G01D 5/353 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens optiques, c.-à-d. utilisant de la lumière infrarouge, visible ou ultraviolette avec atténuation ou obturation complète ou partielle des rayons lumineux les rayons lumineux étant détectés par des cellules photo-électriques en modifiant les caractéristiques de transmission d'une fibre optique
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p. ex. indicateur optique de déformation
G01B 5/00 - Dispositions pour la mesure caractérisées par l'utilisation de techniques mécaniques
A sensor patch (110) is provided that includes a light guide (112) having a sensor element (111). Further, the sensor patch (110) includes a carrier structure having a first fastening element (301) for fastening the light guide (112) at a first position (401), and a second fastening element (302) that is spaced apart from the first fastening element (302) for fastening the light guide at a second position (402), wherein the sensor element (111) is arranged between the first position (401) and the second position (402), an intermediate carrier (500) having a first surface (503), on which the first and second fastening elements (301, 302) are mounted at respective fastening positions (501 502), and an opposing second surface (504) that can be mounted on a measurement object, and a covering element (303) arranged on the intermediate carrier (500) and connected thereto. The covering element (303) has together with the intermediate carrier (500) a cross-sectional dimension, which is oriented approximately perpendicular to a longitudinal extension of the light guide (112), in such a way that the light guide (112) extends in the neutral fiber (900) of the sensor patch (110).
G01D 5/353 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens optiques, c.-à-d. utilisant de la lumière infrarouge, visible ou ultraviolette avec atténuation ou obturation complète ou partielle des rayons lumineux les rayons lumineux étant détectés par des cellules photo-électriques en modifiant les caractéristiques de transmission d'une fibre optique
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
G01M 5/00 - Examen de l'élasticité des structures ou ouvrages, p. ex. fléchissement de ponts ou d'ailes d'avions
22.
Fibre-optic pressure sensor having an optical resonator and a method for pressure measurement
There is provided a fiber-optic pressure sensor (110), which includes a waveguide (112) having an end, an optical deflection unit (301) connected to the end of the waveguide (112), and a sensor body (300) at which an optical resonator (302) is formed by way of a diaphragm (303). The waveguide (112) and/or the deflection unit (301) is/are attached to the sensor body (300) by way of a curable adhesive or a solder connection.
G01L 11/02 - Mesure de la pression permanente, ou quasi permanente d'un fluide ou d'un matériau solide fluent par des moyens non prévus dans les groupes ou par des moyens optiques
G01L 19/00 - Détails ou accessoires des appareils pour la mesure de la pression permanente ou quasi permanente d'un milieu fluent dans la mesure où ces détails ou accessoires ne sont pas particuliers à des types particuliers de manomètres
G01L 9/00 - Mesure de la pression permanente, ou quasi permanente d’un fluide ou d’un matériau solide fluent par des éléments électriques ou magnétiques sensibles à la pressionTransmission ou indication par des moyens électriques ou magnétiques du déplacement des éléments mécaniques sensibles à la pression, utilisés pour mesurer la pression permanente ou quasi permanente d’un fluide ou d’un matériau solide fluent
Embodiments of the present disclosure relate to a device and a method for recognising the attachment of ice to a structure (110) of a construction (100). The device comprises at least one acceleration sensor (10) that is arranged and configured to detect an acceleration on the structure; an evaluation device (30) for determining at least one natural frequency of the structure (110) from the detected acceleration, wherein the evaluation device (30) is configured to indirectly detect attachment of ice to said structure (110) on the basis of the determined natural frequency of the structure (110); and at least one ice detection sensor (20, 20a, 20b) that is arranged and configured to directly detect attachment of ice at a position on said structure (110), wherein the evaluation device (30) combines the indirect detection of the attachment of ice and the direct detection of the attachment of ice.
The invention relates to a method (200) for monitoring a status of at least one wind turbine. The method (200) comprises: detecting first measurement signals via one or more sensors (210), wherein the first measurement signals provide one or more parameters relating to at least one rotor blade of the at least one wind turbine in a normal status; training a trainable algorithm based on the first measurement signals of the normal status (220); detecting second measurement signals via the one or more sensors (230); and recognising an undetermined anomaly via the trainable algorithm trained in the normal status, if a current status of the wind turbine, determined based on the second measurement signals, deviates from the normal status (240).
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 7/00 - Commande des mécanismes moteurs à vent
25.
Method for monitoring a wind turbine, method for identifying ice on a wind turbine, acceleration sensor for a rotor blade, rotor blade comprising an acceleration sensor, and profile for a rotor blade
A method for monitoring a wind turbine is described. The method comprises measuring acceleration by means of a fiber-optic acceleration sensor in a rotor blade of the wind turbine; opto-electronically converting an acceleration signal of the fiber-optic acceleration sensor; and filtering the opto-electronically converted acceleration signal by means of an analog anti-aliasing filter.
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
G01P 15/093 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération en ayant recours aux forces d'inertie avec conversion en valeurs électriques ou magnétiques au moyen de capteurs photo-électriques
F03D 80/40 - Détection de givreMoyens de dégivrage
26.
Method for the individual pitch control of rotor blades of a wind turbine, and wind turbines
A method for the individual pitch control of the rotor blades of a wind turbine is provided herein. In some embodiments, the method includes measuring an acceleration by an acceleration sensor in a rotor blade of the wind turbine; high-pass filtering of a signal of the acceleration sensor in order to determine a time-variant variable; and setting the pitch of the first rotor blade of the wind turbine using the time-variant variable, the pitch setting being part of an individual pitch control.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
A method for predicting the accumulation of ice on a rotor blade of a wind turbine comprising defining upper and/or lower thresholds for a variable associated with the mass of the rotor blade with the mass of an ice attachment of the rotor blade; acquiring system variable data; carrying out a compensation calculation of the curve profile for a prediction time period from the system variable data acquired during a partial time period of the acquisition time period to obtain a prediction curve; performing another compensation calculation of the curve profile for a further prediction time period to obtain a further prediction curve; determining whether or not the upper threshold value will be exceeded by one or more of the prediction curves in future and/or whether the lower threshold value will not be undershot by one or more of the prediction curves in the future; and outputting the determination.
The invention relates to a method for operating a wind turbine. The method comprises measuring a torsion between a first point (10) of a rotor blade (100) of a wind turbine and a second point (12) spaced apart from the first point, and determining at least one parameter, in particular an actual value of the at least one parameter, of the wind turbine based on the measured torsion, wherein the at least one parameter is selected from the group comprising an angle of attack of the rotor blade (100), a pitch angle, a wind speed, an angle of incidence, and a flow speed.
Embodiments of the invention describe a method for ascertaining a value of an ice buildup quantity on at least one rotor blade (111, 112) of a wind turbine (100) and to the use thereof. The method has the steps of ascertaining a base value (G) for at least one natural frequency of the rotor blade when vibrations are excited in an ice buildup-free state; ascertaining a shift base factor for shifting the at least one natural frequency relative to the ice buildup-free state in the event of an ice buildup quantity which is increased by a specific value; detecting a measurement value or a measurement value curve of a measurement variable which is suitable for determining the current natural frequency of the rotor blade (111, 112); determining the current natural frequencies of the rotor blade (111, 112); and deriving a current shift factor by comparing the current natural frequencies with the base value (G), comparing the current shift factor with the shift base factor, and deriving a value for the ice buildup quantity using the comparison.
The invention relates to a clamping device (300) for a light guide (112). The clamping device (300) contains a carrier structure having a first securing element (301) for securing the light guide (112) in a first position (401), and a second securing element (302) at a distance from the first securing element (301) for securing the light guide (112) in a second position (402), wherein the first and second positions (401, 402) have a first distance (403) in a longitudinal extension of the light guide (112). An intermediate carrier (500) is also provided having a first surface (503) on which the first and second securing elements (301, 302) are attached in respective securing positions (501, 502), and having an opposing second surface (504), which can be applied to a measurement object. In addition, a second distance (505) of the securing positions (501, 502) of the securing elements (301, 302) on the intermediate carrier (500) is greater than the first distance (403) in a longitudinal direction of the light guide (112).
G01D 5/353 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens optiques, c.-à-d. utilisant de la lumière infrarouge, visible ou ultraviolette avec atténuation ou obturation complète ou partielle des rayons lumineux les rayons lumineux étant détectés par des cellules photo-électriques en modifiant les caractéristiques de transmission d'une fibre optique
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p. ex. indicateur optique de déformation
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
31.
SENSOR PATCH AND METHOD FOR PRODUCING A SENSOR PATCH
A sensor patch including a light guide having a sensor element. The sensor patch includes a carrier structure having a first fastening element for fastening the light guide at a first position, and a second fastening element for fastening the light guide at a second position, wherein the sensor element is arranged between the first position and the second position, an intermediate carrier having a first surface, on which the first and second fastening elements are mounted at respective fastening positions, and an opposing second surface that can be mounted on a measurement object, and a covering element arranged on the intermediate carrier and connected thereto. The covering element has together with the intermediate carrier a cross-sectional dimension, which is oriented approximately perpendicular to a longitudinal extension of the light guide, in such a way that the light guide extends in the neutral fiber of the sensor patch.
G01D 5/353 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens optiques, c.-à-d. utilisant de la lumière infrarouge, visible ou ultraviolette avec atténuation ou obturation complète ou partielle des rayons lumineux les rayons lumineux étant détectés par des cellules photo-électriques en modifiant les caractéristiques de transmission d'une fibre optique
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p. ex. indicateur optique de déformation
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
Disclosed is a fibre-optic pressure sensor having an optical waveguide with one end, an optical deflection unit that is connected to the optical waveguide and a sensor body, on which an optical resonator is formed by means of a sensor membrane. The optical waveguide and/or the deflection unit are attached to the sensor body by means of a curable adhesive or a solder connection.
G01L 9/00 - Mesure de la pression permanente, ou quasi permanente d’un fluide ou d’un matériau solide fluent par des éléments électriques ou magnétiques sensibles à la pressionTransmission ou indication par des moyens électriques ou magnétiques du déplacement des éléments mécaniques sensibles à la pression, utilisés pour mesurer la pression permanente ou quasi permanente d’un fluide ou d’un matériau solide fluent
G01L 19/00 - Détails ou accessoires des appareils pour la mesure de la pression permanente ou quasi permanente d'un milieu fluent dans la mesure où ces détails ou accessoires ne sont pas particuliers à des types particuliers de manomètres
33.
METHOD FOR MONITORING A WIND TURBINE, METHOD FOR IDENTIFYING ICE ON A WIND TURBINE, ACCELERATION SENSOR FOR A ROTOR BLADE, ROTOR BLADE COMPRISING AN ACCELERATION SENSOR, AND PROFILE FOR A ROTOR BLADE
Disclosed is a method for monitoring a wind turbine. The method comprises: the measurement of an acceleration by means of a fibre-optic acceleration sensor in a rotor blade of the wind turbine; an opto-electronic conversion of an acceleration signal of the fibre-optic acceleration sensor; and the filtering of the opto-electronically converted acceleration signal by means of an analogue anti-aliasing filter.
G01P 15/093 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération en ayant recours aux forces d'inertie avec conversion en valeurs électriques ou magnétiques au moyen de capteurs photo-électriques
34.
METHOD FOR THE INDIVIDUAL PITCH CONTROL OF ROTOR BLADES OF A WIND TURBINE, AND WIND TURBINES
A method for the individual pitch control of rotor blades of a wind turbine. Acceleration is measured by means of a fibre optic acceleration sensor in a rotor blade of the wind turbine. A signal of the fibre optic acceleration sensor is opto- electronically converted. The opto-electronically converted acceleration signal is filtered by means of an analog anti-aliasing filter. The filtered opto-electronically converted acceleration signal of the fiber-optic acceleration sensor is high-pass filtered to determine a time- variable parameter. The pitch of the rotor blade of the wind turbine is set using the time-variable parameter, said pitch setting being performed in the course of an individual pitch control.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
F03D 80/00 - Détails, composants ou accessoires non prévus dans les groupes
09 - Appareils et instruments scientifiques et électriques
16 - Papier, carton et produits en ces matières
35 - Publicité; Affaires commerciales
38 - Services de télécommunications
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Scientific, nautical, surveying, photographic,
cinematographic, optical, weighing, measuring signalling,
checking, life-saving and teaching apparatus and
instruments; apparatus and instruments for conducting,
switching, transforming, accumulating, regulating or
controlling electricity; apparatus for recording,
transmission or reproduction of sound and images; magnetic
data carriers; data processing apparatus and computers. Paper, cardboard and goods made from these materials, not
included in other classes; printed matter; bookbinding
materials; photographs; stationery; office requisites
(except furniture); instructional and teaching material
(except apparatus); plastic materials for packaging (not
included in other classes). Advertising; business management; business administration;
office functions. Telecommunications, in particular providing access to
databases. Scientific and technological services and research and
design relating thereto; industrial research and analysis
services; design and development of computer hardware and
software.
36.
Method and device for monitoring the state of rotor blades
A method for state monitoring of a rotor blade of a wind turbine is described. The method comprises: measuring an acceleration of the rotor blade with a first signal, wherein the acceleration is measured at a first position at a predetermined distance from the rotor blade root in at least one direction comprising a first directional component orthogonal to the axis of the rotor blade, measuring a strain of the rotor blade with a second signal, wherein the strain is measured at a second position disposed in the area of the first position to the rotor blade root, determining a first positional change at the first position on the basis of the acceleration, determining a first value corresponding to the rotor blade stiffness or to the rotor blade elasticity by means of calculation on the basis of the first positional change and the strain, and determining the rotor blade state from the first value.
G01N 3/20 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts permanents de flexion
F03D 11/00 - Détails, parties constitutives ou accessoires non couverts par les autres groupes de la présente sous-classe ou présentant un intérêt autre que celui visé par ces groupes
G01P 15/093 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération en ayant recours aux forces d'inertie avec conversion en valeurs électriques ou magnétiques au moyen de capteurs photo-électriques
G01M 5/00 - Examen de l'élasticité des structures ou ouvrages, p. ex. fléchissement de ponts ou d'ailes d'avions
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
G01M 15/14 - Test des moteurs à turbine à gaz ou des moteurs de propulsion par réaction
A method for the adjustment of an optical measurement system comprises providing an optical measurement system, which comprises, as optical elements, a beam splitter; a first photo sensor, exposed by a first partial beam from the beam splitter; an optical filter; a second photo sensor, arranged downstream of the optical filter, exposed by a second partial beam from the beam splitter. Additionally, the angularity and relative position between multiple optical elements is designed to be adjustable. The method further comprises providing a device for generating a difference signal from the two photo sensors; providing a light source with periodically varying polarization; irradiating the light in the beam splitter, so that the two respective photo sensors are exposed by a partial beam; generating a difference signal of the output signals of the photo sensors; varying the position and/or angularity of at least one optical element, and observing the difference signal, determine the combination of angularity/position of the elements where a minimum difference signal is achieved, and configuring the angularity of the optical elements to the determined values. Further, a corresponding system is proposed.
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p. ex. indicateur optique de déformation
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
G01B 21/04 - Dispositions pour la mesure ou leurs détails, où la technique de mesure n'est pas couverte par les autres groupes de la présente sous-classe, est non spécifiée ou est non significative pour mesurer la longueur, la largeur ou l'épaisseur en mesurant les coordonnées de points
G01L 25/00 - Test ou étalonnage des appareils pour la mesure des forces, du couple, du travail, de la puissance ou du rendement mécanique
G01D 5/353 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens optiques, c.-à-d. utilisant de la lumière infrarouge, visible ou ultraviolette avec atténuation ou obturation complète ou partielle des rayons lumineux les rayons lumineux étant détectés par des cellules photo-électriques en modifiant les caractéristiques de transmission d'une fibre optique
38.
Method for compensation of fiber optic measurement systems and fiber optic measurement system
The present invention relates to a method for compensation, for example, for temperature compensation of a fiber optic measurement system designed for determining a mechanical quantity. First and second fiber Bragg gratings have a respective Bragg wavelength, wherein the fiber Bragg gratings are irradiated with primary light. After applying a mechanical quantity to the first and second fiber Bragg gratings, the Bragg wavelengths of the fiber Bragg gratings are changed by the mechanical quantity. Filtering of the first and second secondary light, said first and second secondary light is effected from the primary light and modified by the Bragg wavelength of the fiber Bragg grating depending on the mechanical quantity by use of an optical filter device follows, in such a way that the Bragg wavelength of the first fiber Bragg grating lies in the region of the rising filter gradient of the optical filter device and the Bragg wavelength of the second fiber Bragg grating lies in the region of the falling filter gradient of the optical filter device. After determining the intensities of the filtered first and second secondary light, they are compared, whereupon the mechanical quantity is determined from the intensity comparison.
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
G01L 1/26 - Mesures auxiliaires prises, ou dispositifs utilisés en liaison avec le mesurage des forces, p. ex. pour empêcher l'influence des composantes transversales de la force, pour empêcher la surcharge
39.
METHOD AND DEVICE FOR MONITORING THE STATE OF ROTOR BLADES
A method for state monitoring of a rotor blade of a wind turbine is described. The method comprises: measuring an acceleration of the rotor blade with a first signal, wherein the acceleration is measured at a first position at a predetermined distance from the rotor blade root in at least one direction comprising a first directional component orthogonal to the axis of the rotor blade, measuring a strain of the rotor blade with a second signal, wherein the strain is measured at a second position disposed in the area of the first position to the rotor blade root, determining a first positional change at the first position on the basis of the acceleration, determining a first value corresponding to the rotor blade stiffness or to the rotor blade elasticity by means of calculation on the basis of the first positional change and the strain, and determining the rotor blade state from the first value.
A method for the adjustment of an optical measurement system comprises providing an optical measurement system, which comprises, as optical elements, a beam splitter; a first photo sensor, exposed by a first partial beam from the beam splitter; an optical filter; a second photo sensor, arranged downstream of the optical filter, exposed by a second partial beam from the beam splitter. Additionally, the angularity and relative position between multiple optical elements is designed to be adjustable. The method further comprises providing a device for generating a difference signal from the two photo sensors; providing a light source with periodically varying polarization; irradiating the light in the beam splitter, so that the two respective photo sensors are exposed by a partial beam; generating a difference signal of the output signals of the photo sensors; varying the position and/or angularity of at least one optical element, and observing the difference signal, determine the combination of angularity/position of the elements where a minimum difference signal is achieved, and configuring the angularity of the optical elements to the determined values. Further, a corresponding system is proposed.
G01L 1/24 - Mesure des forces ou des contraintes, en général en mesurant les variations des propriétés optiques du matériau quand il est soumis à une contrainte, p. ex. par l'analyse des contraintes par photo-élasticité
