Abrégé

The invention relates to the use of laser beams for measuring rotors, in particular wind turbines, for determining an imbalance or defining the absolute setting angle and/or measuring a half-profile of a rotor blade, and a method for determining a torsion of the rotor blade as a deviation between two pitch angles. In contrast to the solution in EP 2582970A1, the invention enables the determining of the absolute pitch angle of a rotor blade during operation, without it being necessary to obtain information relating to the rotor blade or reference points with a known position relative to the pitch axis, in particular using measuring devices that are mobile and/or positioned on the ground. It is also possible to contactlessly detect imbalances.

Classes IPC  ?

• F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
• F03D 13/35 - Équilibrage des balourds statiques ou dynamiques

Abrégé

The invention relates to a measurement method and to a wind power plant having a corresponding measurement system for monitoring and/or optimizing wind power plants. Known measurement methods have the disadvantage of allowing only limited information about the state of a rotor blade or the operating state of a wind power plant. The aim of the invention is to disclose a measurement method allowing detailed information about the state of at least one rotor blade and thereby enabling optimization of the operating mode of the wind power plant or enabling early detection of material defects or material deviations. The aim is achieved by a measurement method or a wind power plant having a corresponding measurement system, wherein at least two profile lines are captured by means of a rotor blade.

Classes IPC  ?

• 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

Abrégé

According to the invention said aim is achieved by means of a method for controlling a wind energy system comprising a tower, a nacelle horizontally rotatably disposed on the tower, and a horizontal rotor rotatably disposed on the nacelle, wherein the distance to the rotor blades passing through is measured at at least two different measurement points by means of at least two non-contacting distance sensors disposed fixedly on the nacelle and symmetrically to the rotor axis, the measurement axes thereof running symmetrically to the rotor axis, and the measured distance signals or a difference between the signals is used as the guide parameter for the controlled or regulated adjustment of actuating parameters of the wind energy system.

Classes IPC  ?

• 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

Abrégé

The invention relates to a method for measuring deflection of a substantially elongated hollow component (B) of a wind energy system from a normal position, extended such that it can be used to determine the deflection of the hollow component (B) of a of a wind energy system from a normal position in a simple and accurate manner, and to reliably monitor the same. To this end, the invention proposes that at least one distance sensor (8.1) for measuring distance in a non-contacting, directed manner is disposed at a first position, taking distance measurements from a target point in the direction of a second position within the hollow component (B), and that a measurement target (9.1) is further disposed in the interior of the hollow component (B) at the second position, said target comprising a target surface extending in a direction (x) transverse to a reference plane (R) perpendicular to the measurement direction (10) of the distance sensor (8.1) in a measurement area, and that distance measurements to the target surface are taken continuously or at intervals by the distance sensor (8.1), wherein the results of the distance measurements are evaluated in a processing unit, and an associated deflection of the hollow component (B) from the normal position is determined from said measurements, each with regard to the directional component of the direction (x) in which the target surface extends transverse to the reference plane (R).

Classes IPC  ?

• G01B 5/28 - Dispositions pour la mesure caractérisées par l'utilisation de techniques mécaniques pour mesurer la rugosité ou l'irrégularité des surfaces

Abrégé

b) is evaluated, said system emitting a collision warning in the event of a critical distance not being reached.

Classes IPC  ?

• H02P 9/04 - Commande s'exerçant sur un moteur primaire non électrique et dépendant de la valeur d'une caractéristique électrique à la sortie de la génératrice
• F03D 9/00 - Adaptations des mécanismes moteurs à vent pour une utilisation particulièreCombinaisons des mécanismes moteurs à vent avec les appareils qu’ils entrainentMécanismes moteurs à vent spécialement adaptés à l’installation dans des endroits particuliers

Abrégé

The invention relates to a method for measuring deflection of a substantially elongated hollow component (B) of a wind energy system from a normal position, extended such that it can be used to determine the deflection of the hollow component (B) of a of a wind energy system from a normal position in a simple and accurate manner, and to reliably monitor the same. To this end, the invention proposes that at least one distance sensor (8.1) for measuring distance in a non-contacting, directed manner is disposed at a first position, taking distance measurements from a target point in the direction of a second position within the hollow component (B), and that a measurement target (9.1) is further disposed in the interior of the hollow component (B) at the second position, said target comprising a target surface extending in a direction (x) transverse to a reference plane (R) perpendicular to the measurement direction (10) of the distance sensor (8.1) in a measurement area, and that distance measurements to the target surface are taken continuously or at intervals by the distance sensor (8.1), wherein the results of the distance measurements are evaluated in a processing unit, and an associated deflection of the hollow component (B) from the normal position is determined from said measurements, each with regard to the directional component of the direction (x) in which the target surface extends transverse to the reference plane (R).

Classes IPC  ?

• F03D 1/06 - Rotors
• 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
• G02B 5/00 - Éléments optiques autres que les lentilles
• G01S 17/08 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement
• G01C 3/06 - Utilisation de moyens électriques pour obtenir une indication finale
• G01B 17/04 - Dispositions pour la mesure caractérisées par l'utilisation de vibrations infrasonores, sonores ou ultrasonores pour mesurer la déformation dans un solide, p. ex. par corde vibrante
• G01M 5/00 - Examen de l'élasticité des structures ou ouvrages, p. ex. fléchissement de ponts ou d'ailes d'avions