With Measuring, Testing, Signalling Or Inspection Means Patents (Class 416/61)
  • Patent number: 9714085
    Abstract: Method and apparatus for determining the deflection or curvature of a rotating blade, such as a wind turbine blade or a helicopter blade. Also, methods and apparatus for establishing an inertial reference system on a rotating blade.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: July 25, 2017
    Assignee: Purdue Research Foundation
    Inventors: Jonathan R. White, Douglas E. Adams, Josh Paquette
  • Patent number: 9638169
    Abstract: A wind turbine blade (22) is cantilevered from a shaft (50) of a rotor (20). A pitch reference azimuth (74) of the blade may be located by generating a function (66, 67, 68, 69) of gravitational bending strain or moment magnitude of the blade versus pitch angle of the blade for a vector component (85, 86) of gravitational force (GF) relative to a predetermined transverse line (CL, 83) of the blade, such as a chord line, over a range of pitch angles of the blade. The pitch reference azimuth may be set at a characteristic point (70, 71, 72) on the function, such as an inflection point Two such functions (67, 69) may be generated with the blade in two respective positions on opposite sides of the rotor The intersection point (73) of these functions is a pitch reference point that is compensated for rotor tilt.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: May 2, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: John M. Obrecht
  • Patent number: 9605996
    Abstract: An apparatus for monitoring a machine element (02), which moves with respect to a base and rotates about its own axis, having a sensor (06) and evaluation electronics (09). According to the invention, the sensor (06) and the evaluation electronics (09) and also a power supply unit and a transmitter unit (12) are arranged on the moving machine element (02).
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: March 28, 2017
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Hans-Willi Kessler, Klaus Vaehsen
  • Patent number: 9574546
    Abstract: A method for operating a wind turbine is provided. The method includes determining a wind condition, determining for the wind condition expected azimuthal positions of a rotating wind rotor of the wind turbine, and determining for the wind condition desired azimuthal positions of the rotating wind rotor so that at least one of a load balance of the rotating wind rotor and a power uptake of the rotating wind rotor is improved compared to the expected azimuthal positions.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: February 21, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Hartmut Scholte-Wassink
  • Patent number: 9239040
    Abstract: An assembly configuration between a wind turbine rotor blade and a rotor hub includes a rotor hub having one or more pitch bearings, with each pitch bearing having an outer diameter race and an inner diameter race. Rotor blades are affixed to the respective pitch bearing rings, with the rotor blades having a root end with an outer diameter. An adaptor is configured between the root end and the pitch bearing, with the adaptor affixed to the inner diameter race and the root end affixed to the adaptor. The adaptor defines a mounting surface for the root end radially inward of the pitch bearing such that the root end outer diameter is less than the diameter of the inner diameter race.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: January 19, 2016
    Assignee: General Electric Company
    Inventor: Jay F. Leonard
  • Patent number: 9206786
    Abstract: A method for acoustically monitoring a wind turbine, in particular for monitoring the existence of loose objects inside the wind turbine is provided. A sound generated in a rotating part of the wind turbine is monitored during operation of the wind turbine which sound is analyzed with respect to specific parameter values of the sound within at least one specific frequency range and if such specific parameter values are detected, a signal for possible further actions is generated. An acoustic monitoring system for a wind turbine and a re-equipment kit are also disclosed.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: December 8, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Jimmi Andersen, Per Egedal, Dennis Soebye Jensen
  • Patent number: 9207154
    Abstract: A method and system for monitoring creep in an object are provided. The creep monitoring system includes a creep sensor assembly that includes at least one image pattern pair disposed on a surface of the object. The creep monitoring method includes receiving information from the creep sensor assembly regarding an observed creep and an offset associated with the object, correcting the observed creep using the information regarding the offset and outputting the corrected information relative to the creep.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: December 8, 2015
    Assignee: General Electric Company
    Inventors: Kevin George Harding, Yi Liao
  • Patent number: 9194369
    Abstract: A wind turbine rotor blade is equipped with an air chamber and equipped via the air chamber to route a modulation beam out of the rotor blade such that the air current along the rotor blade is changed. Thereby the laminar current is changed into a turbulent current on the one hand and its detachment and on the other hand its recreation is achieved in order to produce the laminar current. The control may occur via electrostatic actuators via a learnable control strategy based on neural forecasts, which take the complexity of the non-linear system into account and allow for the plurality of influencing factors. The stress on the rotor blades may be reduced, resulting in longer service life and reduced maintenance costs, a higher level of efficiency or quieter operation.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: November 24, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Kristian Robert Dixon, Siegmund Düll, Per Egedal, Thomas Esbensen, Volkmar Sterzing
  • Publication number: 20150145253
    Abstract: The invention is a method for controlling and/or monitoring a wind turbine 1 equipped with a LIDAR sensor 2. Control and/or monitoring provides an estimation of the wind speed at the rotor obtained an estimator and a LIDAR sensor 2. The estimator of the wind speed at the rotor is constructed from a representation of the wind, a model of the LIDAR sensor and a wind propagation model.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Inventors: Benoit BAYON, Jonathan CHAUVIN
  • Publication number: 20150139798
    Abstract: A system and method for blade angle position feedback. The system comprises an annular member operatively connected to rotate with a propeller, a sensor fixedly mounted adjacent the annular member and configured for detecting a passage of each singularity as the annular member is rotated and axially displaced and for generating a sensor signal accordingly, the annular member and sensor configured for relative axial displacement between a first relative axial position and a second relative axial position respectively corresponding to the first and the second mode of operation, and a detection unit connected to the sensor for receiving the sensor signal therefrom, determining on the basis of the sensor signal a time interval elapsed between the passage of successive singularities, and computing from the time interval blade angle position.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 21, 2015
    Inventors: Brant DUKE, James Robert JARVO, Michael MARK, Mario GUERRA
  • Patent number: 9032807
    Abstract: The invention provides a method and system of monitoring bending strain on a wind turbine blade. The method in one aspect comprises: locating at least three strain sensors on the turbine blade, in use each strain sensor providing a strain measurement, the strain sensors located such that edgewise and flapwise bending can be determined from the strain measurements; calculating a plurality of resultant bending strains using the strain measurements; calculating an average resultant bending strain from the plurality of resultant bending strains; and calculating a confidence value for a first sensor based on a comparison of resultant bending strains derived from the strain measurement from the first sensor with the average resultant bending strain.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: May 19, 2015
    Assignee: Vestas Wind Systems A/S
    Inventor: Ib Svend Olesen
  • Patent number: 9033663
    Abstract: A wind turbine rotor includes a hub with a rotor blade mounted to a bearing of the hub wherein the rotor blade has a longitudinal axis extending in a radial direction relative to an axis of rotation of the hub, and the rotor blade is rotatable about its longitudinal axis whereby the pitch of the rotor blade is adjustable. The rotor blade has a tag such as an RFID tag fixed on the rotor blade at a predetermined angular position about the longitudinal axis of the rotor blade; and a sensor is fixed on the hub for contactless sensing of the tag when the tag is in a predetermined angular position about the longitudinal axis of the rotor blade. Repeated and accurate calibration of rotor blade pitch is hereby made possible.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: May 19, 2015
    Assignee: Vestas Wind Systems A/S
    Inventor: Niels Erik Danielsen
  • Publication number: 20150132127
    Abstract: A system may include at least one computer device configured to attain a two-dimensional used profile of a leading edge at a specified radial position on a turbomachine airfoil after use. The system aligns opposing substantially straight alignment portions of the two-dimensional used profile with opposing substantially straight alignment portions of a previously attained, two-dimensional, baseline profile of the turbomachine airfoil. The alignment portions of each profile are in substantially identical radial locations of the turbomachine airfoil. Comparing the used profile to the baseline profile determines whether the leading edge at the specified radial position of the used turbomachine airfoil has erosion. The system may also include a laser profiler for measuring the turbomachine airfoil.
    Type: Application
    Filed: November 12, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Jacob Andrew Salm, Kelsey Elizabeth Beach, Alexander James Pistner, Birol Turan
  • Publication number: 20150118046
    Abstract: An electric arc detection system is presented. The electric arc detection system comprises a receiving antenna that receives electromagnetic radiation generated by an electric arc formed in an internal cavity of a non-conductive hollow structure, and a processing subsystem for determining an existence of the electric arc in the internal cavity based upon signals representative of the electromagnetic radiation.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: General Electric Company
    Inventor: Yaru Najem Mendez Hernandez
  • Publication number: 20150118047
    Abstract: A method for determining parameters of a wind turbine is disclosed. The method may generally include receiving signals from at least one Micro Inertial Measurement Unit (MIMU) mounted on or within a component of the wind turbine and determining at least one parameter of the wind turbine based on the signals received from the at least one MIMU.
    Type: Application
    Filed: January 27, 2012
    Publication date: April 30, 2015
    Inventors: Ken Yoon, Brandon Shane Gerber, Lisa Kamdar Ammann, Hai Qiu, Yong Yang, Zhilin Wu, Xu Fu, Lihan He, Na Ni, Qiang Li
  • Patent number: 9014861
    Abstract: A method for noise-reduced operation a wind is provided. The method includes determining a wind speed during normal operation of the wind turbine and determining a weighted rotor speed setpoint for a rotor of the wind turbine so that a noise emission of the wind turbine for the wind speed is reduced compared to nominal noise emission of the wind turbine at the wind speed. Using the weighted rotor speed setpoint, a torque setpoint for a power conversion assembly connected to the rotor is determined. The torque setpoint is applied to the power conversion assembly to control the wind turbine.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: April 21, 2015
    Assignee: General Electric Company
    Inventor: Sid Ahmed Attia
  • Patent number: 9004862
    Abstract: A control system for calibrating a wind turbine sensor placed on a component of a wind turbine and related methods are disclosed. The wind turbine includes a rotor having at least one wind turbine blade. The method comprises pitching one or more of the at least one of the wind turbine blades according to a predetermined pitch movement which induces a vibratory motion in the at least one turbine blade. A wind turbine sensor measures a vibratory response signal at least partly caused by the vibratory motion. A characteristic sensor response value is determined from the vibratory response signal. The characteristic sensor response value may be compared to a predetermined sensor calibration parameter to determine whether a difference is greater than a predefined tolerance parameter. In this manner, the wind turbine sensor may be calibrated.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: April 14, 2015
    Assignee: Vestas Wind Systems A/S
    Inventor: Erik Carl Lehnskov Miranda
  • Publication number: 20150098819
    Abstract: A system for detecting deformation of a fan for an aeroengine, the fan including a rotor including plural blades made of composite material including woven fibers. At least one of the fibers in each of the blades is an optical fiber including at least one portion defining a Bragg grating. The system further includes a transceiver connected to the optical fiber and configured to send an optical signal into the optical fiber and to receive an optical signal in response from the optical fiber, and a detector module connected to the transceiver to detect deformation of the fan when the received optical signal presents correlation with a predetermined signature of a damped impact on a blade at a determined speed of rotation. This deformation may be the result of a foreign object impacting against a blade of the fan or may follow from variation in an internal defect.
    Type: Application
    Filed: March 19, 2013
    Publication date: April 9, 2015
    Applicant: SNECMA
    Inventors: David Tourin, Pierre Ferdinand, Valerio Gerez, Andre Leroux
  • Patent number: 8998568
    Abstract: A turbine is provided and includes a rotor, which is rotatable about a centerline thereof, a sensor to measure a condition at a point of measurement interest defined on the rotor at a radial distance from the centerline, a communication system by which condition measurements are transmittable from the sensor to a non-rotating recording system and a probe holder to secure the sensor and a portion of the communication system on the rotor proximate to the point of measurement interest.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: April 7, 2015
    Assignee: General Electric Company
    Inventors: Kurt Kramer Schleif, Gregory Quentin Brown, Philip Michael Caruso, Fernando Jorge Casanova, Seung-Woo Choi, Josef Scott Cummins, Matthew Ryan Ferslew, Andrew Clifford Hart, Robert David Jones, Jong Youn Pak, Francesco Soranna
  • Publication number: 20150093244
    Abstract: A total air temperature sensor includes an airfoil body extending from an airfoil base to an opposed airfoil tip along a longitudinal axis. The airfoil body defines a leading edge and opposed trailing edge. The airfoil body defines an interior flow passage with an inlet for fluid communication of fluid into the interior flow passage and an outlet for exhausting fluid out from the interior flow passage, and wherein the airfoil body defines a bleed passage through the airfoil body between the leading edge and the interior flow passage. A temperature probe is mounted within the interior flow passage for measuring temperature of flow through the interior flow passage to determine total air temperature.
    Type: Application
    Filed: February 12, 2014
    Publication date: April 2, 2015
    Applicant: ROSEMOUNT AEROSPACE INC.
    Inventor: Scott Wigen
  • Patent number: 8979492
    Abstract: A method for determining and applying a pitch angle offset signal for controlling a rotor frequency of a rotor of a wind turbine is disclosed. The method includes obtaining a motion quantity indicative of a motion of the rotor and determining the pitch angle offset signal based on the motion quantity such that the pitch angle offset signal is adapted to be used for adjusting a blade pitch angle of a rotor blade mounted at the rotor for controlling the rotor frequency in order to reduce a time span during which the rotor is in a critical motion region. A corresponding system and a method for controlling a rotor frequency are also disclosed.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: March 17, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Esbensen, Gustav Hoegh
  • Publication number: 20150071778
    Abstract: A wind turbine system is presented. The wind turbine system includes a rotor comprising a plurality of blades and a hub, and a turbine controller configured to reduce an abnormal amplitude modulation of the wind turbine by adjusting pitch angles of the plurality of blades during a rotation of the rotor based upon aerodynamic loads acting on the rotor.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 12, 2015
    Applicant: General Electric Company
    Inventors: Sara Simonne L. Delport, Saskia Gerarda Honhoff
  • Publication number: 20150069762
    Abstract: Systems and methods for monitoring wind turbine loading are provided. In one embodiment, a system includes a main shaft, a bedplate, and a gearbox coupled to the main shaft and mounted to the bedplate. The gearbox includes an outer casing and a torque arm extending from the outer casing. The system further includes an isolation mount coupled to the torque arm, and a sensor configured to measure displacement of the torque arm. In another embodiment, a method includes operating the wind turbine, and detecting displacement of a torque arm of a gearbox of the wind turbine. The method further includes calculating a moment for a main shaft of the wind turbine based on the displacement of the torque arm.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 12, 2015
    Applicant: General Electric Company
    Inventors: Dale Robert Mashtare, James Henry Madge, Charudatta Subhash Mehendale, George Albert Goller, Conner B. Shane
  • Patent number: 8974180
    Abstract: A method for estimating an operating temperature of component in turbo machinery includes providing body detachably affixed to component, operating machinery, stopping operation of machinery, and removing body. The method includes obtaining concentration profile by determining final concentration of at least one species in first material and in second material, and determining a transient concentration of at least one species between first material and second material. The method includes determining an operating temperature by correlating concentration profile to corresponding operating temperature for system. A system including body is also provided. Body includes at least one species, a first material having a starting first concentration of the species, a second material arranged to permit migration of the species from first material to second material. Species migrates from first material to second material during operation of turbo machinery allowing body to estimate temperature during operation.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: March 10, 2015
    Assignee: General Electric Company
    Inventors: Jason Robert Parolini, Junyoung Park, Canan Uslu Hardwicke, Andrew Joseph Detor
  • Publication number: 20150064005
    Abstract: A wind turbine includes a number of blades and an optical measurement system comprising a light source, such as a laser, an optical transmitter part, an optical receiver part, and a signal processor. The light source is optically coupled to the optical transmitter part, which includes an emission point for emitting light in a probing direction. The optical receiver part comprises a receiving point and a detector. The optical receiver part is adapted for receiving a reflected part of light from a probing region along the probing direction and directing the reflected part of light to the detector to generate a signal used to determine a first velocity component of the inflow. The emission point is located in a first blade at a first radial distance from a center axis, and the receiving point is located in the first blade at a second radial distance from the center axis.
    Type: Application
    Filed: November 7, 2014
    Publication date: March 5, 2015
    Inventors: Peter FUGLSANG, Lars FUGLSANG, Lars Christian Hvidegaard HAMMER
  • Publication number: 20150056077
    Abstract: A detection system for a turbine engine that is configured to identify the presence of at least a partial blockage of guide vanes by monitoring deflection of an adjacent row of turbine blades. The detection system may include one or more sensors positioned radially outward from tips of turbine blades in a row of turbine blades adjacent an upstream row of guide vanes that remain stationary. The detection system may also include a conditioning module in communication with the sensor to amplify the output signals received from the sensor. A processing module may be in communication with conditioning module to analyze signals produced by the sensor via the conditioning module and generate an alarm if the processing module detects a change in amplitude, such as an increase of amplitude at frequencies between about 400 Hertz and about 900 Hertz.
    Type: Application
    Filed: August 23, 2013
    Publication date: February 26, 2015
    Inventor: Nikolai R. Tevs
  • Publication number: 20150056072
    Abstract: Systems and methods for preventing excessive loading on a wind turbine are disclosed. The method includes: measuring an actual wind parameter upwind from the wind turbine using one or more sensors; providing the measured wind parameter to a processor; providing a plurality of wind turbine operating data to the processor; utilizing the plurality of operating data to determine an estimated wind turbine condition at the wind turbine; generating a control wind profile based on the actual wind parameter and the estimated wind turbine condition; and, implementing a control action based on the control wind profile to prevent excessive loading from acting on the wind turbine.
    Type: Application
    Filed: August 20, 2013
    Publication date: February 26, 2015
    Applicant: General Electric Company
    Inventors: Thomas Franklin Perley, Brandon Shane Gerber, Arne Koerber
  • Publication number: 20150050143
    Abstract: Methods and systems for detecting rotor blade damage in a wind turbine are provided herein. A monitoring system includes a filter module and a damage determination module. The filter module is configured to determine an amplitude of a 1P frequency component of at least one operating condition of the wind turbine. The damage determination module is configured to compare the determined 1P frequency component amplitude to a threshold 1P frequency component amplitude.
    Type: Application
    Filed: August 19, 2013
    Publication date: February 19, 2015
    Applicant: General Electric Company
    Inventor: Leonardo Cesar Kammer
  • Publication number: 20150010399
    Abstract: The disclosure presents systems, methods and computer program products relating to a wind farm. The presence of flying animals, such as birds, bats, and insects may be determined. Deterrence elements such as acoustic and/or visual deterrence elements may be activated in an attempt to deter animals whose presence was determined, and/or independently of a determination of animal presence. The rotation of the blades of one or more wind turbines may be slowed down and/or halted if collision is probable, in order to prevent flying animal casualties. Energy from deterrence elements may produce a predetermined tempo-spatial pattern of lights and/or sounds.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 8, 2015
    Applicant: BIRDSVISION LTD.
    Inventors: Ofer Bahat, Noah Satat
  • Patent number: 8915711
    Abstract: A centrifugal compressor wheel including a hub, a web extending radially from the hub, and a plurality of blades carried by the wheel. The web includes an erosion indicator of the wheel.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: December 23, 2014
    Assignee: Turbomeca
    Inventors: Geoffroy Billotey, Olivier Descubes, Sylvain Gourdant, Olivier Tuot
  • Patent number: 8915709
    Abstract: Methods and apparatus for optically detecting an angle of attack for an airfoil using light detection and ranging (LIDAR). To determine the angle of attack, one or more light beam pulses may be emitted from the leading edge of the airfoil into an (apparently) flowing fluid at various emission angles. The emitted pulses may be backscattered by particles in the fluid, and the backscattered light may be received by a detector at the airfoil. By range gating the returning pulses of backscattered light, a fluid velocity may be determined for each of the emission angles. The angle of attack is identified as the emission angle corresponding to the maximum velocity. A parameter (e.g., pitch or speed) of the airfoil may be controlled based on the angle of attack. In this manner, the airfoil may be manipulated or the shape of the airfoil may be adjusted for increased performance or efficiency.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: December 23, 2014
    Assignee: Vestas Wind Systems A/S
    Inventor: Carsten Hein Westergaard
  • Publication number: 20140369833
    Abstract: Systems and methods for blade health monitoring are provided. According to one embodiment of the disclosure, a system may include a feature extraction module and an anomaly detection module in communication with the extraction module. The feature extraction module may be configured to continuously receive blade passing signal data associated with clearance of a blade and pre-process the blade passing signal data. Blade clearance feature data may be extracted from the blade passing signal data prior to transmission to the anomaly detection module. The anomaly detection module may be configured to normalize the blade clearance feature data received from the extraction module, analyze the blade clearance feature data to detect a shift in the clearance of the blade, and determine an abnormality of the blade based on the shift exceeding a predetermined shift threshold.
    Type: Application
    Filed: June 12, 2013
    Publication date: December 18, 2014
    Inventors: Lijie Yu, Venkatesh Rajagopalan, Sachin Srivastava, Mayank Lalan
  • Publication number: 20140363294
    Abstract: The present application provides a method of inspecting a bond joint. The method may include the steps of applying an exothermic adhesive to a first shell and/or a second shell, attaching the first shell to the second shell via the exothermic adhesive to create the bond joint, allowing the exothermic adhesive to cure, and imaging the heat released by the exothermic adhesive along the bond joint. The bond joint may be a turbine blade bond joint.
    Type: Application
    Filed: June 5, 2013
    Publication date: December 11, 2014
    Inventors: Gary Austin Lamberton, Curtis Wayne Rose
  • Publication number: 20140363290
    Abstract: The invention relates to a method for monitoring a gearbox of a wind energy installation comprising. The invention further relates to a corresponding computer program product, a corresponding monitoring system for monitoring a gearbox of a wind energy installation and a corresponding wind energy installation.
    Type: Application
    Filed: December 6, 2012
    Publication date: December 11, 2014
    Inventor: Jörn Jacobsen
  • Publication number: 20140356166
    Abstract: A capacitive sensor for measuring the clearance between the apex of the vanes of a rotor and the inner surface of an abradable coating covering the inner surface of a turbomachine casing, the clearance measuring capacitive sensor including a first electrode the material of which is abradable so as to get worn upon contacting an apex of a vane, the material of the first electrode having a degree of wear substantially identical to the degree of wear of the material of the abradable coating.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 4, 2014
    Inventor: Andre Leroux
  • Publication number: 20140355007
    Abstract: A method of determining rotor blade axial displacement (bij). The rotor blade tip (34) comprises first and second measurement features (36, 38) arranged to make an acute angle therebetween. Measure time of arrival (tijk) of the once per revolution feature (1), first and second edges (40, 42) of the first measurement feature (36), and first and second edges (44, 46) of the second measurement feature (38), for at least two revolutions of the rotor (2). Convert these to circumferential distances (dijk) for each revolution. Calculate a feature angle (?ijk) between each measurement feature (36, 38) and the once per revolution feature (1) for each revolution. Calculate blade untwist angle (?ij) from the change in feature angle (?ijk) between measured revolutions. Calculate the rotor blade axial displacement (bij) from the blade untwist angle (?ij) and the circumferential distance (dijk) of the point from one of the measurement features (36, 38).
    Type: Application
    Filed: March 25, 2014
    Publication date: December 4, 2014
    Applicant: ROLLS-ROYCE PLC
    Inventor: Olivier Y J P JOUSSELIN
  • Publication number: 20140356165
    Abstract: A wind turbine blade has a suction side shell member and a pressure side shell member. The shell members are joined along a leading and trailing edge from a root to a tip of the blade and defining an internal cavity of the blade. A pressure sensor is configured on at least one of the suction or pressure side shell members. The pressure sensor further includes a body mounted to an inner surface of the respective shell member within the internal cavity. A sensing element has a first side exposed to external air pressure through a passage in the respective shell member, and an opposite second side exposed to a reference pressure. Control circuitry within the body generates a variable output signal as a function of a pressure differential between the external air pressure and reference pressure experienced by the sensing element.
    Type: Application
    Filed: March 14, 2011
    Publication date: December 4, 2014
    Inventors: Wei Xiong, Danian Zhang, Xiongzhe Huang, Jing Wang, Jingyun Xia
  • Publication number: 20140356164
    Abstract: Apparatus for detecting aerodynamic conditions of a rotor blade (22) of a wind turbine (10). An acoustic sensor (24) may be remotely located from the rotor blade. The sensor may be focused to monitor a portion of a blade path swept by the rotor blade to detect an aerodynamic condition such as flow separation, and may provide input to a controller (27) for control of a pitch of the blade effective to prevent the flow separation from developing into a full stall condition. One sensor may be focused to monitor blades of more than one wind turbine. A plurality of such sensors in a wind park may be connected to a supervisory controller (120) to predict the propagation of wind conditions progressing through the park.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 4, 2014
    Inventors: MICHAEL J. ASHEIM, Manjinder J. Singh, Johannes Gerhardes Wardjan Alberts
  • Patent number: 8899921
    Abstract: A wind turbine blade is configured such that the lift force from the blade airfoil is always normal, or nearly normal, to the shaft torque. This condition maximizes energy conversion. This objective may be achieved by a) having the airfoil chord always aligned to the actual wind direction (subject only to small angle of attack variations), and b) slowing the turbine rotation rate so that no blade twist is needed. As a result, blade tip speed due to shaft rotation is less than the wind speed, and preferably much less. This low tip speed eliminates any hazard to birds. The lift force from the blade airfoil directly drives the torque on the shaft, so the control problem simplifies to adjusting the blade angle of attack to keep the lift constant across varying wind speeds.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: December 2, 2014
    Inventor: Earl McCune
  • Patent number: 8899911
    Abstract: The invention provides a heat-dissipating system and a control method thereof. The heat-dissipating system has a plurality of fans and is configured for adjusting rotation-speeds of the fans. The control method includes following steps: obtaining a plurality of rotation-speed values of the fans; computing out a rotation-speed reference value according to the rotation-speed values; when the rotation-speed reference value is greater than a first threshold value, decreasing the rotation-speeds of the fans through a corresponding fan control signal; when the rotation-speed reference value is less than a second threshold value, increasing the rotation-speeds of the fans through the corresponding fan control signal.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: December 2, 2014
    Assignee: Coretronic Corporation
    Inventors: Chih-Cheng Chou, Wen-Hsien Su, Tsung-Ching Lin, Chao-Nan Chien
  • Patent number: 8899920
    Abstract: A wind turbine yaw system is provided that includes a yaw gear, at least two pinion gears, and at least two drive units, each of which is associated to one of the pinion gears for driving that pinion gear. The yaw system also includes a control system with a controller for generating a drive unit control signal for each drive unit for controlling the respective drive unit according to a reference signal having a desired operational parameter value for the respective drive unit, so as to realize the desired operational parameter value in the respective drive unit. The control system includes a feedback loop for each drive unit feeding a drive unit feedback signal including at least the actual value of one operational parameter of the respective drive unit back to the controller. The controller generates the drive unit control signals based on the reference signal and the feedback signals.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: December 2, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Kurt Andersen
  • Publication number: 20140348652
    Abstract: A fan test device to connect a motherboard and a fan includes a control chip, a first connector, a second connector, a first switch chip, a second switch chip, a first electronic switch, and a second electronic switch. The control chip is connected to sensing pins of the first and second connectors. The first electronic switch is connected between a power terminal and a power pin of the first connector. The second electronic switch is connected between the power terminal and a power pin of the second connector. The control chip outputs different signals corresponding to the connection of the first and second connectors to control the first and second switch chips.
    Type: Application
    Filed: May 21, 2014
    Publication date: November 27, 2014
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: BO TIAN, KANG WU
  • Publication number: 20140348653
    Abstract: The invention relates to a wind turbine comprising a rotor hub (7) rotating about a rotor axis (8), rotor blades (9, 10, 11) extending radially with respect to the rotor axis (8) at the same angular spacing relative to one another, and a remote wind gauge (19) that is fastened externally on the surface of the hub (7) in a mounting (20) and oriented such that wind characteristics at a distance in front of the hub (7) can be ascertained or measured, wherein the remote wind gauge (19) is arranged between two neighbouring rotor blades (9, 10) and in the radial direction of the rotor axis (8) and the mounting (20) is fastened to a respective blade bearing flange (21, 22) in the region of the connection of the rotor hub (7) to the rotor blades (9, 10), such that the remote wind gauge (19) can be retrofitted to the wind turbine (1).
    Type: Application
    Filed: December 12, 2012
    Publication date: November 27, 2014
    Inventor: Norbert Kötting
  • Patent number: 8876460
    Abstract: An apparatus for measuring turbine rotor-to-stator clearances and a method for assembling a turbomachine based on the measured clearances are disclosed. In an embodiment, at least one clearance sensor is inserted into a stator of a turbomachine. Using the sensor, tops-on clearance between a rotor blade tip and an inner surface of a stator is measured while an upper stator shell, a rotor, a lower stator shell are assembled together; and a tops-off clearance is measured while the lower stator shell and a rotor are assembled together. A tops-on/tops-off shift, i.e., a difference between the tops-on clearance and the tops-off clearance, is determined. The turbine can be assembled by adjusting a relative position of the rotor and stator to account for the tops-on/tops-off shift.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: November 4, 2014
    Assignee: General Electric Company
    Inventor: Fred Thomas Willett, Jr.
  • Publication number: 20140314564
    Abstract: A system comprising a first wind turbine structure and a second wind turbine structure, wherein the first wind turbine structure and the second wind turbine structure are rotatable with respect to each other is provided. A safety bearing element is mounted to the first wind turbine structure such that the second wind turbine structure is in slideable contact with a contact surface of the safety bearing element if a distance between the first wind turbine structure and the second wind turbine structure is reduced below a predetermined reference value. The safety bearing element comprises an electrical indicating circuitry with an indicating conductor, wherein the indicating circuitry is connectable to a wear controller system such that a signal is generatable by the indicating circuitry and transmitted to the wear controller system until the indicating conductor is damaged due to the slideable contact of the second wind turbine structure with the safety bearing element.
    Type: Application
    Filed: December 4, 2013
    Publication date: October 23, 2014
    Applicant: Siemens Aktiengesellschaft
    Inventor: JENS ARNE MIKKELSEN
  • Patent number: 8864442
    Abstract: An opposed-flow steam turbine having an HP section and an IP section connected by a shaft, with mid-span packing surrounding the shaft in a region between the HP and IP sections; and a steam conduit extending from the mid-span packing and through a shell of the turbine; the steam conduit incorporating a pressure tap for directly and continuously measuring pressure in the mid-span packing during operation of the steam turbine.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: October 21, 2014
    Assignee: General Electric Company
    Inventor: Christopher M. Tomaso
  • Patent number: 8864465
    Abstract: The present invention relates to a test blade for a blade-release test. The blade is arranged in use to be mounted on a hub for rotation, and to be released therefrom by the action of a controlled explosion. The blade is arranged to receive at least one explosive charge and at least one detonator for detonating the charge. The blade further comprises a cut-through portion extending completely through the blade from a front face to a rear face, the cut-through portion also extending part way along the blade in an axial direction between a leading edge and a trailing edge of the blade.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: October 21, 2014
    Assignee: Rolls-Royce PLC
    Inventors: Joana Vaz Viegas, Jeremy Nicholas Turner
  • Patent number: 8864462
    Abstract: An active sensing system for wind turbines is described. The sensing system may include a plurality of ports, a local sensing device and a load mitigation device and may be operably coupled to a control system. The plurality of ports, local sensing device, and load mitigation device may be operably coupled and configured to monitor air pressure on wind turbine blades, determine if proper sensing operation is occurring, and eradicate an obstruction if proper sensing operation is being prevented by the obstruction. Associated methods performing the sensing and eradication of the obstruction including purging and deicing are disclosed. Wind turbines and wind turbine blades with the active sensing system are also described.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: October 21, 2014
    Assignee: Frontier Wind, LLC
    Inventors: Edward A. Mayda, Jonathon P. Baker, Leigh Zalusky, Thomas Jay Green
  • Publication number: 20140308122
    Abstract: A system and method for detecting ice on a rotor blade of a wind turbine are disclosed. In one embodiment, the method may include releasing a pitch brake of a pitch adjustment mechanism associated with the rotor blade, controlling the pitch adjustment mechanism so as to maintain the rotor blade at a fixed pitch angle, monitoring a pitch-related parameter of the wind turbine while the rotor blade is maintained at the fixed pitch angle, and analyzing the monitored pitch-related parameter to determine whether ice is present on the rotor blade.
    Type: Application
    Filed: April 11, 2013
    Publication date: October 16, 2014
    Applicant: General Electric Company
    Inventor: Jorge Gonzalez Castro
  • Publication number: 20140308128
    Abstract: A fan system suitable for an electronic device is provided. The fan system includes a fan module and a fan protecting module. The fan module includes a base and a fan blade assembly. The base is disposed at the electronic device and has a chamber. The fan blade assembly includes a fan blade and a shaft portion. The fan blade is fixed on the shaft portion. The shaft portion is rotatably contained in the chamber. The fan protecting module includes an electromagnetic component and an accelerometer. The electromagnetic component is disposed at a position adjacent to the shaft portion. The accelerometer is disposed in the electronic device and coupled to the electromagnetic component. When an acceleration of the electronic device detected by the accelerometer is greater than a threshold value, the electromagnetic component applies magnetic force to the shaft portion to prevent the shaft portion from overly shifting or deflecting.
    Type: Application
    Filed: September 24, 2013
    Publication date: October 16, 2014
    Applicant: Wistron Corporation
    Inventors: Chia-Lung Hsu, Po-Cheng Chen, Ming-Chi Kao, Ming-Chih Chen