With Measuring, Testing, Signalling Or Inspection Means Patents (Class 416/61)
  • Patent number: 8858155
    Abstract: The invention relates to a method of aligning a wind turbine component with a wind turbine rotor hub, comprising providing the component with a support comprising at least one adjustable element and adjusting said at least one element to align the wind turbine component. The invention further relates to a system for aligning a wind turbine component with a wind turbine rotor hub comprising a support with at least one adjustable element supporting said wind turbine component, such that said wind turbine component can be aligned by adjusting said at least one element.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: October 14, 2014
    Assignee: Alstom Wind, S.L.U.
    Inventors: Daniel Castell Martinez, Carlos Casanovas Bermejo
  • Patent number: 8858174
    Abstract: The present subject matter relates to methods and systems for operating a wind turbine that, in some embodiments may include a gearbox. The wind turbine is provided with a blade having an adjustable pitch angle and the tip speed ratio (TSR) of the blade is monitored. In operation, the method and system is configured to increase the pitch angle of the blade concurrently with an increase in TSR to maintain turbine operation within an identified high power coefficient (Cp) operational region for the blade. TSR may be monitored by monitoring one of the velocity of the tip of the blade, wind speed, the rotational speed of the blade, or the rotational speed of a component within the gearbox.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: October 14, 2014
    Assignee: General Electric Company
    Inventors: Dongjai Lee, Stefan Herr, Klaus Ulrich Koegler
  • Patent number: 8854631
    Abstract: A sunlight filter device for a helicopter blade tracker includes a filter housing, a filter assembly and a mounting system. The filter housing has a first opening, a second opening and a receiving cavity formed between the first opening and the second opening. The filter assembly is mounted in the receiving cavity of the filter housing, and is adapted to block sunlight. The mounting system extends from the filter housing to securely mount the filter housing on the helicopter blade tracker.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: October 7, 2014
    Inventor: William Morehead
  • Patent number: 8840368
    Abstract: An abnormal vibration detection unit which is capable of stopping a wind turbine generator when excessive vibration is detected. The vibration detection unit has first and second acceleration detectors, a calculation device, a filtering relay, and a safety system which performs an emergency stop of the wind turbine generator in accordance with an output terminal of the filtering relay. The filtering relay has a filter circuit to extract a frequency component from the second analog output signal. The calculation device generates a predicted value of the output signal of the filter circuit part, and detects a failure of the first and second acceleration detectors or the filter circuit part by comparing the predicted value of the output signal of the filter circuit part with a measured value of the output signal of the filter circuit part received from the filtering relay.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: September 23, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Taketo Mizoue, Mitsuya Baba
  • Patent number: 8839656
    Abstract: A method of checking a wind turbine in a wind farm with a number of wind turbines for a yaw misalignment is provided. In this method, the yaw angles of at least a subset of wind turbines of the wind farm are ascertained, an average yaw angle is established from the ascertained yaw angles, and a yaw misalignment of the wind turbine to be checked is identified by a deviation of its yaw angle from the average yaw angle by more than a threshold value.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: September 23, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dan Frederiksen, Allan Groenlund Joergensen
  • Publication number: 20140271181
    Abstract: A method for reducing loads acting on a wind turbine in response to transient wind conditions is disclosed. The method may generally include determining an actual value for a blade parameter of a rotor blade of the wind turbine using a first sensor associated with the rotor blade, monitoring a secondary operating parameter of the wind turbine using a second sensor, determining a predicted value for the blade parameter based on the secondary operating parameter, comparing the actual value to the predicted value and performing a corrective action to reduce the loads acting on the wind turbine if the actual value differs from the predicted value by at least a differential threshold.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Thomas Franklin Perley, Brandon Shane Gerber, Rahul Rastogi
  • Publication number: 20140271193
    Abstract: A system and method for pressure based load measurement are provided. The system and method measure at least one pressure differential on an airfoil and determine at least one aerodynamic load associated with the at least one pressure differential. The determined at least one load is used to modify characteristics of the airfoil to increase efficiency and/or avoid damage. The determined at least one aerodynamic load may be further utilized to balance and/or optimize loads at the airfoil, estimate a load distribution along the airfoil used to derive other metrics about the airfoil, and/or used in a distributed control system to increase efficiency and/or reduce damage to, e.g., one or more wind turbines.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: FRONTIER WIND, LLC
    Inventors: Jonathon P. Baker, Edward A. Mayda
  • Publication number: 20140271188
    Abstract: According to one embodiment, a flapping measurement system may include a position sensor and a controller. The position sensor may be disposed on the flapping plane of a rotor blade and operable to provide position measurements identifying locations of the position sensor during operation of the rotor blade. The controller may be operable to identify flapping of the rotor blade based on the position measurements.
    Type: Application
    Filed: April 3, 2013
    Publication date: September 18, 2014
    Applicant: Bell Helicopter Textron Inc.
    Inventor: Bell Helicopter Textron Inc.
  • Patent number: 8827645
    Abstract: A core for a composite structure is described. The core has first and second core layers, and an interlayer region between the first and second core layers. At least one of the first and second core layers has hinge portions that facilitate draping of the core without interrupting the interlayer region. The interlayer region may include functionality such as a radar reflecting layer and/or optical fibres. Alternatively, the core may be a bonded core in which the interlayer region includes an adhesive layer for bonding the first and second core layers together.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: September 9, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Steve Appleton, Knud Stenbæk Nielsen
  • Patent number: 8821109
    Abstract: A device for detecting the axial position of a rotary shaft of a rotary machine comprises a target of ferromagnetic material placed at the end of the rotary shaft, an induction coil associated with a stationary magnetic circuit and placed facing the target while leaving an airgap, and a power supply circuit. The power supply circuit comprises an AC voltage source connected between a first end of the induction coil and a zone situated at a reference voltage, at least one capacitor connected between the ends of the induction coil, and a detector device interposed between a second end of the induction coil and the zone situated at the reference voltage, in order to deliver on a line information about the magnitude of the current flowing between the second end and the zone situated at the reference voltage.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: September 2, 2014
    Assignee: SKF Magnetic Mechatronics
    Inventor: Ulrich Schroeder
  • Patent number: 8814514
    Abstract: A fiber optic sensor is embedded in an integral housing block formed by molding or extrusion. The housing block has a mounting surface for attachment to a wind turbine component by adhesive or mechanical connection. In an arrangement where the sensor is to be isolated from strains on the component, the housing block may be mounted on the component by means of a smaller mounting portion, joining the mounting portion at a neck region.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: August 26, 2014
    Assignee: Vestas Wind Systems A/S
    Inventor: Ib Olesen
  • Patent number: 8801361
    Abstract: A machine includes a rotor supported to rotate about a rotational axis and an actuator arranged to act on the rotor and control a position of the rotor about the rotational axis. A bladed turbomachine wheel is coupled to the rotor and has blade tips that pass closely to an adjacent, non-rotating surface. A sensor is adjacent to the turbomachine wheel and arranged to sense the blade tips and output a position signal representative of the position of blade tips relative to the sensor. A controller is coupled to the sensor and the actuator and is adapted to receive the position signal from the sensor and generate and send a control signal to the actuator to control the position of the rotor based on the position signal from the sensor.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: August 12, 2014
    Assignee: Calnetix Technologies, LLC
    Inventor: Lawrence A. Hawkins
  • Publication number: 20140219793
    Abstract: A system for detecting a defect in a hollow blade includes a pressure sensor mounted within a cavity of the hollow blade, wherein the pressure sensor measures a pressure within the cavity and provides an output indicative of measured pressure; and a controller to receive the output from the pressure sensor, wherein the controller indicates a defect in the hollow blade based upon the received output.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 7, 2014
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventor: UNITED TECHNOLOGIES CORPORATION
  • Patent number: 8794903
    Abstract: A wind energy systems includes a shroud for each turbine. The shroud is adapted to direct and accelerate wind towards the turbine. A strong adaptable support assembly is provided for securing turbines to a structure. An air glide yaw assembly facilitates rotational movement of the structure allowing the turbines to face oncoming wind. The turbine blades are optimized for use with a shroud.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: August 5, 2014
    Assignee: Green Energy Technologies, LLC
    Inventors: John W. Fedor, Mark L. Cironi
  • Patent number: 8794920
    Abstract: A method and arrangement of controlling blade pitch angle of a set of rotor blades. The method comprises providing a target blade pitch angle to a controller mounted on the rotor; measuring the speed of rotation of the rotor using a rate gyro mounted on the rotor; calculating the blade pitch angle required to match the target blade pitch angle by summing the target blade pitch angle and the measured rotational speed; and actuating the blades to the calculated blade pitch angle.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: August 5, 2014
    Assignee: Rolls-Royce PLC
    Inventors: Marko Bacic, Jonathan E. Holt
  • Publication number: 20140211414
    Abstract: A heat dissipation device is for dissipating heat generated from an electronic device, and includes at least one fan and a control device. The control device detects a rotational speed of each of the at least one fan, determines whether the rotational speed of the at least one fan is less than a predetermined value, and determines whether an notification signal is output based on the determination.
    Type: Application
    Filed: September 26, 2013
    Publication date: July 31, 2014
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: KANG WU
  • Patent number: 8786117
    Abstract: A sensor assembly for use with a wind turbine rotor blade is provided. The sensor assembly includes an air data probe including a base shaft, a tip, and a rod portion extending therebetween, wherein the rod portion is fabricated from a composite material. The sensor assembly includes a receptacle configured to couple within the leading edge of the rotor blade for receiving the base shaft therein such that the tip extends a distance from the leading edge when the base shaft is received within the receptacle.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: July 22, 2014
    Assignee: General Electric Company
    Inventors: Christopher James Winslow, Stefan Herr, Mark West, Alexander Kimberley Simpson, Ryan Michael LeClair
  • Patent number: 8784056
    Abstract: A system includes a creep indicating member on a rotating component, and a measurement device configured to measure a change in radial position of the creep indicating member. The system allows determination of, for example, rotating component life expectancy in a turbine, without exposing the rotating component.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: July 22, 2014
    Assignee: General Electric Company
    Inventor: Fred Thomas Willett, Jr.
  • Publication number: 20140186176
    Abstract: A method of determining a degree of yaw error of a wind turbine is provided. The method includes obtaining wind pressure measurement values from in front of the rotor plane, which wind pressure measurement values exhibit a periodic nature related to a rotation of a spinner of the wind turbine, performing a signal processing step to process the wind pressure measurement values to determine a phase offset of the wind pressure measurement values relative to an angular reference, and deriving a yaw error angle from the phase offset. A method of establishing a relationship between a phase offset of wind pressure measurement values and a degree of yaw error of a wind turbine, a yaw error determination unit, and a wind turbine are also provided.
    Type: Application
    Filed: December 17, 2013
    Publication date: July 3, 2014
    Inventors: Jimmi Andersen, Jan Martin Jensen, Johnny Rieper
  • Patent number: 8764393
    Abstract: A method for operating a wind power plant (WEA) before or during the performance of maintenance work on the wind power plant (WEA). At least one physical condition of the surroundings outside the wind power plant (WEA) induced by wind movement outside the wind power plant (WEA) is detected as an external physical condition. At least one physical condition of a component of the wind power plant (WEA) influenced by wind movement outside the wind power plant (WEA) is detected as an internal physical condition. The at least one external physical condition and/or at least one internal physical condition are evaluated. The at least one external physical condition is compared with a predetermined reference value for the external physical condition. The at least one internal physical condition is compared with a predetermined reference value for the internal physical condition. Depending on the comparison, at least one warning message is generated.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: July 1, 2014
    Assignee: Senvion SE
    Inventors: Martin Von Mutius, Jens Altemark, Alf Trede
  • Patent number: 8764397
    Abstract: A rotor system is provided wherein coaxial, closely spaced multi-bladed rotors counter-rotate at extremely low RPMs while their pitches are controlled to account for wind gusts and velocity conditions, thereby eliminating many of the deficiencies of conventional helicopters. The embodiments can dramatically decrease the power required to lift a given quantity of weight, even beyond the level required by a typical airplane.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: July 1, 2014
    Inventor: Michael Brian Wittig
  • Patent number: 8768646
    Abstract: A method for measurement of a film cooling effect is disclosed. Film cooling is a technique developed to protect gas turbine engine components from the extremely high temperatures created during its operation. A controlled air pressure is ducted into the hollow interior of the component and the mass rate of air flowing through the plurality of film cooling features or openings is measured. A coolant is then injected into the hollow interior of the component and allowed to flow out of a film cooling feature onto the heated outer surface of the component. The resulting infrared signature is a measure of the relative cooling effect generated by the individual film cool feature. The film cooling effect for an individual feature is quantified as the proportion of mass rate of airflow contributed by its relative individual cooling effect. The area, location and shape of the cooling effect are further classified to determine the degree of conformance to its design intent.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: July 1, 2014
    Assignee: Meyer Tool, Inc.
    Inventor: Douglas E. Key
  • Publication number: 20140178200
    Abstract: An indicating circuit for indicating the rotation speed of a fan includes a rotation speed indicating module connected to the fan and receiving rotation speed signals from the fan. The indicating circuit includes a switch and a light emitting element. If the received signal is a high level signal, the switch is turned on, and the light emitting element emits light. If the reeived signal is a low level signal, the switch is turned off, and the light emitting element does not emit light.
    Type: Application
    Filed: August 29, 2013
    Publication date: June 26, 2014
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (WUHAN) CO., LTD.
    Inventors: YONG-ZHAO HUANG, JIN-LIANG XIONG
  • Patent number: 8753080
    Abstract: An upwind wind turbine includes a tilting coupling mechanism configured to couple base end portions of blades to a hub such that the blades can tilt between a normal position and a retracted position in which the blades are tilted in a downwind direction relative to the normal position. The upwind wind turbine also includes a tilting drive operating in association with the tilting coupling mechanism to switch the positions of the blades and a rotation stop to stop the rotation of the rotor. When the blades are switched to the retracted position, the rotation stop is actuated to stop the rotor in a predetermined rotational position in which the blades can tilt without interference with the tower, and the tilting drive is actuated to tilt the blades to the retracted position after stop of the rotation of the rotor.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: June 17, 2014
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventor: Masafumi Morimoto
  • Patent number: 8753082
    Abstract: A multi-stage gear box (122) of a wind power plant, wherein the gear box (122) includes a gear box housing (125). The gear box (122) includes at least one access opening for the insertion of a work instrument into the gear box housing (125) or respectively into the interior of the gear box housing (125) is provided on the outside of the gear box housing (125) and in that at least one guiding device (201, 202, 203, 204, 205) is provided for the work instrument inside the gear box housing (125) so that the work instrument is moveable and/or positionable within the guiding device (201, 202, 203, 204, 205). Parts of the gear box (122) in the gear box housing (125) are checked and/or worked by a work instrument inserted or arranged or arrangeable in the guiding device (201, 202, 203, 204, 205).
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: June 17, 2014
    Assignee: Senvion SE
    Inventors: Jochen Fuglsang-Petersen, Jan-Bernd Franke
  • Publication number: 20140161612
    Abstract: A tip shroud of a bladed rotor can be monitored for integrity using a sensor configured to detect the tip shroud. A signal from the sensor can be monitored and if the magnitude of the signal changes, such as beyond a defined amount, an indication of possible damage can be made. A baseline sensed pattern for a revolution of the tip shroud can be compared to an operation sensed pattern for a subsequent revolution, and the indication of damage can be made if there is more than the defined amount and/or percentage of difference between the patterns.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 12, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Venkata Ramana Murthy Hemadribhotla, Michael Allen Ball, Patrick Clinton Bowling, Mahesh Pasupuleti, Alexander James Pistner
  • Patent number: 8747069
    Abstract: An adjustable height pressure sensing port arrangement is provided. In some example, the pressure sensing port may be arranged on an airfoil, such as wind turbine blade. The pressure sensing port arrangement may include a pressure sensing port body and a spring arranged within the port body. The pressure sensing port arrangement may further include a pressure sensing port arranged vertically above the spring and a rotatable capture disk arranged vertically above the port. The capture disk may be rotated to adjust a height of the capture disk. Further, the spring may be arranged to force an alignment feature of the pressure sensing port into an alignment feature on the rotatable capture disk in order to secure the port and capture disk in place.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: June 10, 2014
    Assignee: Frontier Wind, LLC
    Inventors: Leigh Zalusky, Erick Rickards
  • Patent number: 8740543
    Abstract: A method of deploying offshore wind turbine assemblies includes mounting a wind turbine assembly horizontally on a vessel and transporting the wind turbine assembly to an offshore site. The wind turbine assembly is raised to a vertical condition at the site and attached to anchor weights. Blades are attached to the turbine head after the wind turbine assembly is in the vertical condition. In one embodiment, the wind turbine assembly can include a tower including tapered lower and upper sections joined together at their respective wide ends, a turbine head connected to the upper section, and a platform connected to the lower section. The platform includes a buoy tank partially filled with ballast to provide mass and buoyancy. A wave piercing cowling is rotatively attached to the lower section. The turbine head can include an adjustable journal bearing, scabbard blade mounts, and a gearless induction generator with flux adjusting capabilities.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: June 3, 2014
    Inventor: Lloyd E. Weaver
  • Publication number: 20140140848
    Abstract: The invention refers to a system and method for reinforcing a weakened area of a wind turbine blade whose interior comprises a box beam extending from the blade root to the blade tip and wherein said box beam comprises an open end at the blade root. The system is characterized by comprising a repair module (100) adapted for moving inside the box beam and transporting a reinforcement element (107) from the blade root to the weakened area; and by the repair module (100), which is adapted for applying the reinforcement element (107) onto a interior surface of the box beam in the weakened area.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 22, 2014
    Applicant: GAMESA INNOVATION & TECHNOLOGY, S.L.
    Inventors: Juan Jose FUERTES THOMAS, Irune LARISGOITIA ASTOBIZA, Andres RIEZU CORPAS
  • Publication number: 20140140843
    Abstract: A wind turbine has a Lidar device to sense wind conditions upstream of the wind turbine. Wind speed signals from the wind turbine are processed to detect an extreme operating gust. The detection is performed by differentiating the axial wind velocity and filtering for a period of time. On detection of extreme operating gust the system controller takes necessary evasive action which may include shutting down the turbine or varying the blade pitch angle.
    Type: Application
    Filed: May 3, 2012
    Publication date: May 22, 2014
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Chris Spruce, Christopher Palmer, Robert Bowyer
  • Publication number: 20140133981
    Abstract: Disclosed is a system and method for monitoring wind turbines, generally comprising a microphone for picking up acoustic emissions from a wind turbine and outputting a signal corresponding to the emissions; a filter for splitting the signal into a plurality of signals according to a plurality of frequency bands; and a processor for processing the plurality of signals and generating sound level data corresponding to at least a subset of the frequency bands. The system compares the sound level data with a sound threshold and generates an alarm signal when the sound level data exceeds the sound threshold. Alternatively, the system may include different thresholds corresponding to the different frequency bands, and an alarm can be generated when one or more of the different thresholds are exceeded by the different signals in the different frequency bands.
    Type: Application
    Filed: November 12, 2013
    Publication date: May 15, 2014
    Applicant: Inventus Holdings, LLC
    Inventors: Ann Frey, Frank Roark, Miguel Gonzalez
  • Patent number: 8721284
    Abstract: A hollow-cast casting is provided, which includes at least one core opening that is caused by the production technique and which has a closure device that closes the core opening. The closure device can be inserted into the core opening axially in relation to the core opening and provides at least one surface region which, in axial projection in relation to the core opening, can be made to abut a surface region of the casting that is facing toward the casting. The surface region lies radially outside a cross-sectional area predetermined by the core opening.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: May 13, 2014
    Assignee: Alstom Technology Ltd.
    Inventors: Martin Balliel, Christoph Didion, Thomas Duda, Marcel Koenig
  • Patent number: 8718831
    Abstract: A method for monitoring operating parameters of a rotating blade is provided. The blade includes at least one sensor thereon, the sensor operatively coupled to a data acquisition device. The method includes transferring data from the sensor to the data acquisition device, the data relating to blade acceleration measurements, transmitting a signal representative of the transferred data from the data acquisition device to a control system, and controlling blade loads using the transmitted signal.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: May 6, 2014
    Assignee: General Electric Company
    Inventors: Dong Wang, Hua Zhang
  • Patent number: 8714912
    Abstract: An arrangement for detecting bending deflection of a wind turbine blade is provided. The arrangement for the wind turbine includes a radio transmitter and a linear antenna array assigned to the radio transmitter. The radio transmitter is mounted on the blade tip and emits a signal. The antenna array is mounted on the rotor of the wind turbine in a co-rotating manner and receives the signal. On the basis of the transit times of the signal from the rotor to the individual antennas of the array, the position of the radio transmitter relative to the array is determined. In the event of blade deflection, for example when a high wind load is present, the relative position changes which is detected by the arrangement.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: May 6, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Roland Gierlich, Jörg Hüttner, Andreas Ziroff
  • Publication number: 20140119889
    Abstract: A system is disclosed. The system includes a processing subsystem that determines preliminary voltages corresponding to a plurality of blades based upon blade passing signals (BPS), and generates a plurality of clearance values by normalizing the preliminary voltages for effects of one or more operational parameters, wherein the plurality of clearance values are representative of clearance of the plurality of blades.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 1, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rahul Srinivas Prabhu, Mahalakshmi Shunmugam Balasubramaniam, Ajay Kumar Behera, Aninda Bhattacharya, Venkatesh Rajagopalan, Prashanth D'Souza, Vivek Venugopal Badami
  • Patent number: 8708651
    Abstract: The current invention provides significant performance improvements or significant energy savings for fans used in these applications: personal, industrial and automotive cooling, ventilation, vacuuming and dust removal, inflating, computer component cooling, propulsors for unmanned and manned air vehicles, propulsors for airboats, air-cushion vehicles, airships and model aircraft. Additionally, the invention provides higher performance such as higher lift and higher lift efficiency to small air vehicles. These advantages are achieved by using plasma actuators to provide active flow control effectors into thin fan blades and wing.
    Type: Grant
    Filed: October 26, 2008
    Date of Patent: April 29, 2014
    Inventor: David Greenblatt
  • Patent number: 8712703
    Abstract: The invention comprises a turbulence sensor and sensor system for determining the condition of a wind turbine blade. A turbulence sensor comprises a sensor membrane provided in the surface of a wind turbine blade. A light source and light detector provided in a sensor cavity in the blade illuminate the sensor membrane and detect the light reflected back. The reflected light is mixed with non-reflected light to give an interference pattern indicative of the quality of the airflow, whether it is laminar or turbulent. The turbulence sensor can be used in a sensor system for detecting the accumulation of unwanted matter, such as dirt or ice, on the blade.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: April 29, 2014
    Assignee: Vestas Wind Systems A/S
    Inventor: Ib Olesen
  • Patent number: 8702388
    Abstract: A method of calibrating one or more load sensors of a blade of a wind turbine, said wind turbine comprising a main generator, a power electronic converter connected with the main generator, and a rotor operationally connected with the main generator and carrying the blade. The method comprises acting on the power electronic converter to operate the main generator as motor to set the blade in at least one predetermined condition. The method further comprises measuring loads in the predetermined condition using the load sensors of the blade and calibrating the blade load sensors taking into account the measured loads.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: April 22, 2014
    Assignee: Alstom Wind, S.L.U.
    Inventors: José Miguel Garate Álvaro, Isaac Pineda Amo
  • Publication number: 20140105741
    Abstract: The invention relates to a method for improving the heat resistance of a resistive element embedded in an alumina deposit covering a surface of a substrate, the alumina deposit comprising a surface portion and a deep portion which is sandwiched between the surface portion and the surface of the substrate and in which the resistive element is located, which method is characterised in that it comprises a densification of the surface portion of the alumina deposit. Field of application: any field in which an evaluation of the deformation of mechanical parts intended to be exposed to very high temperatures, by means of resistive elements of the strain gauge type, is necessary, and in particular the design of engine parts in the aeronautics field of the turbine blade type.
    Type: Application
    Filed: October 14, 2013
    Publication date: April 17, 2014
    Applicant: SNECMA
    Inventors: Vanessa Aurelie GISLARD, Melanie Alice Camille Ruelle
  • Patent number: 8690535
    Abstract: A sensor system for measuring aerodynamic loads acting on a wind turbine rotor blade is disclosed. The measured aerodynamic loads can be converted to an angle of attack of the resulting wind which flows past the moving rotor blade. The sensor is realized as a trailing edge flap which is elastically moveable relative the main part of the wind turbine blade. By measuring motion of the trailing edge flap or corresponding motions of components of the sensor system, the aerodynamic forces acting on the blade can be determined. Due to the relative small dimensions of the sensor flap and the relative small displacements of the flap, the sensor system only affects the aerodynamic properties insignificantly.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: April 8, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Chee Kang Lim, Teck Bin Arthur Lim, Kok Leong Chong, Li Hong Idris Lim, Whye Ghee Kim, Tian Lim
  • Publication number: 20140093373
    Abstract: A system and associated method for detecting lighting strikes on a wind turbine uses a plurality of lightning strike conductors that are connected to any combination of the wind turbine components. A common ground cable is connected to the conductors and to a wind turbine grounding system. A sensor is operatively configured on the common ground cable to detect current flowing through the cable from a lightning strike incident on any one of the receptors, with the sensor producing a signal proportional to the intensity of the lightning strike.
    Type: Application
    Filed: October 3, 2012
    Publication date: April 3, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Michael Schmidt, Michael Christopher Booth
  • Patent number: 8672625
    Abstract: A vibration-resistant wind turbine and process for operation is provided. The wind turbine has a rotor with at least two blades, each of which includes an inclinometer arrangement with at least two axes, and an evaluating unit. The evaluating unit determines the bending and/or twisting of the blade relative to the longitudinal axis of the blade on the basis of signals from the inclinometer arrangement for each blade during operation. Each rotor blade further has at least one liquid tank which is capable of receiving or transferring liquid from or to a liquid reservoir via a transfer mechanism in response to the determined bending and/or twisting of the rotor blades to reduce vibration caused by imbalances, thereby extending the service life of the wind turbine.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: March 18, 2014
    Assignee: Prüftechnik Dieter Busch AG
    Inventors: Edwin Becker, Marcel Kenzler, Johann Loesl
  • Publication number: 20140064961
    Abstract: A pitch drive system for a wind turbine includes a pitch drive motor, a first position detector, a driver, a second position detector, and a controller. When the blades rotate to a mechanical zero position, a position value detected by the first position detector is a first zero point position value. The driver is operable to store the first zero point position value. When the blades rotate to the mechanical zero position, a position value detected by the second position detector is a second zero point position value. The controller is operable to store the second zero point position value. When a corresponding back up command is received, the first zero point position value stored in the driver is backed up into the controller, and the second zero point position value stored in the controller is backed up into the driver respectively.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 6, 2014
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Yu-Ding HE, Jian WANG, Hong-Yan LIU, Zhi-Guang GAO
  • Publication number: 20140064966
    Abstract: A blade tracking system including a detector having one or more sensors to detect radiation from at least one field of view of the detector, the one or more sensors generating signals based on changes in incident radiation to the one or more sensors as a rotor blade passes the field of view, and a processor to determine a pass time for the rotor blade to pass through the at least one field of view based on the generated signals.
    Type: Application
    Filed: August 21, 2012
    Publication date: March 6, 2014
    Inventors: William Simpkins, John Wilson, David Dorris
  • Publication number: 20140056705
    Abstract: A load control system for a wind turbine and a method for controlling wind turbine loading are provided. The system includes a sensor assembly. The sensor assembly includes a light source mounted to a rotor shaft and configured to emit a light, and a sensor mounted to the rotor shaft and configured to sense the light and measure a location of the light in a plane perpendicular to a longitudinal axis. The system further includes a controller communicatively coupled to the sensor assembly.
    Type: Application
    Filed: August 21, 2012
    Publication date: February 27, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Danian Zheng, Hua Xia, Kevin Thomas McCarthy, Dale Robert Mashtare
  • Patent number: 8657558
    Abstract: Methods, apparatus, and products are disclosed for improving the airflow exiting a blower that has one or more adjustable guide vanes that are affixed to the blower at one or more pivot points located in an outlet of the blower that include: determining a rotational speed of an impeller in the blower and adjusting a position of at least one of the adjustable guide vanes in dependence upon the rotational speed of the impeller.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: February 25, 2014
    Assignee: International Business Machines Corporation
    Inventors: Michael S. June, Jason A. Matteson, Mark E. Steinke
  • Patent number: 8649911
    Abstract: A technique is provided for operating a wind farm at increased rated power output. The technique includes sensing a plurality of operating parameters of the wind turbine generator, assessing the plurality of operating parameters with respect to respective design ratings for the operating parameters, and intermittently increasing a rated power output of the wind turbine generator based upon the assessment.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: February 11, 2014
    Assignee: General Electric Company
    Inventors: Aaron John Avagliano, Ralph Teichmann, Kirk Gee Pierce, Paul David Hopewell, Ameet Shridhar Deshpande, Sukru Alper Eker
  • Patent number: 8641374
    Abstract: A maintenance apparatus is provided for use with a wind turbine that has a tower, a hub supported by the tower, and a plurality of blades extending outwardly from the hub. The maintenance apparatus has a mounting element that is configured to be secured to the tower and to be selectively movable along the length thereof. A robotic arm is coupled to the mounting element, and a blade-engaging device is coupled to the robotic arm and is configured to engage one of the blades to effect a maintenance task thereon.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: February 4, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Chakradhar Byreddy, Robert Bowyer, Ashish Sareen
  • Patent number: 8641361
    Abstract: Methods, apparatus, and products are disclosed for improving the airflow exiting a blower that has one or more adjustable guide vanes that are affixed to the blower at one or more pivot points located in an outlet of the blower that include: determining a rotational speed of an impeller in the blower and adjusting a position of at least one of the adjustable guide vanes in dependence upon the rotational speed of the impeller.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: February 4, 2014
    Assignee: International Business Machines Corporation
    Inventors: Michael S. June, Jason A. Matteson, Mark E. Steinke
  • Publication number: 20140030091
    Abstract: A control method of a fan comprises steps of detecting a rotational speed of a blade and a rotor position of the blade; generating a control signal according to the rotational speed and a predetermined rotational speed; obtaining a Back-EMF waveform according to the control signal, the rotational speed, the rotor position and a waveform; adjusting the phase of the Back-EMF waveform; and outputting a switch control signal.
    Type: Application
    Filed: March 15, 2013
    Publication date: January 30, 2014
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Jen-Hao WU, Wei-Shun HUANG, Tai-Yu CHEN