IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0237699
(2008-09-25)
|
등록번호 |
US-8152440
(2012-04-10)
|
발명자
/ 주소 |
- Zheng, Danian
- Gerber, Brandon S.
- Magnuson, David C.
- Willey, Lawrence D.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
A wind turbine blade instrumentation structure and method is provided for fluid dynamic polymer-based contact sensors measuring ambient pressure based on the resistivity changes across the sensor. The pressure sensors may applied in predetermined patterns to airfoil structures, such as wind turbine
A wind turbine blade instrumentation structure and method is provided for fluid dynamic polymer-based contact sensors measuring ambient pressure based on the resistivity changes across the sensor. The pressure sensors may applied in predetermined patterns to airfoil structures, such as wind turbine blades, without impacting the blade structure and fluid dynamic characteristics. The pressure sensors measure blade performance with high fidelity. The pressure measurements are transmitted to processing to determine blade characteristics and environment including flow separation, stagnation point, angle of attack, lift and drag and wind speed. Further processing of the pressure distribution may identify wind shear, up-flow and yaw error.
대표청구항
▼
1. A wind turbine blade instrumentation structure for a fluid dynamic resistive contact sensor adapted for measurement of fluid dynamic parameters related to wind turbine blade performance, the structure comprising: a plurality of fluid dynamic resistive contact sensors, each of the plurality of flu
1. A wind turbine blade instrumentation structure for a fluid dynamic resistive contact sensor adapted for measurement of fluid dynamic parameters related to wind turbine blade performance, the structure comprising: a plurality of fluid dynamic resistive contact sensors, each of the plurality of fluid dynamic resistive contact sensors comprising a pressure-sensing diaphragm, a base plate and a pressure-sensitive conductive composite material disposed between the pressure-sensing diaphragm and the base plate, the pressure-sensing diaphragm being spaced apart from the base plate such that a cavity is defined between the pressure-sensing diaphragm and the base plate, the pressure-sensitive conductive composite material being formed of a polymer and a conductive filler, wherein the plurality of contact sensors are distributed according to a predetermined pattern on the surface of a wind turbine blade;a mounting structure for the plurality of fluid dynamic resistive contact sensor on the wind turbine blade, adapted to maintain the plurality of fluid dynamic resistive contact sensors fixed in place during wind turbine operation; andmeans for communicating electrically a signal between the plurality of fluid dynamic resistive contact sensors on the blade and a data acquisition terminal. 2. The wind turbine blade instrumentation structure according to claim 1, wherein the predetermined pattern comprises at least one chord of the blade, including at least one of a pressure surface for a leading edge; a trailing edge; a frill leading edge; a full trailing edge; and a leading edge suction surface. 3. The wind turbine blade instrumentation structure according to claim 1, wherein the predetermined pattern includes a skewed mounting pattern with respect to a chord line of the blade. 4. The wind turbine blade instrumentation structure according to claim 1, wherein the plurality of fluid dynamic resistive contact sensors are disposed at a plurality of chords at predetermined axial positions along the blade, including at least one of a full span distribution; an outer ⅓ span; an inner ⅓ span; a middle ⅓ span; and a blade tip span. 5. The wind turbine blade instrumentation structure according to claim 1, wherein the predetermined pattern comprises: at least one spanwise spread between a leading edge and a trailing edge of the blade, including at least one of a leading edge span; a trailing edge span; and a full chord span. 6. The wind turbine blade instrumentation structure according to claim 1, wherein the mounting structure for the plurality of fluid dynamic resistive contact sensors on the wind turbine blade includes the plurality of fluid dynamic resistive contact sensors being permanently fixed in a surface of the blade. 7. The wind turbine blade instrumentation structure according to claim 6, wherein the mounting structure further comprises: mounting the plurality of fluid dynamic resistive contact sensors in place within the surface of the blade during a process of blade bonding. 8. The wind turbine blade instrumentation structure according to claim 1, wherein the mounting structure for the plurality of contact sensors on the wind turbine blade comprises: mounting to an exterior surface of the blade, including mounting by at least one of gluing to the exterior surface and expoxing to the exterior surface. 9. The wind turbine blade instrumentation structure according to claim 1, wherein the means for communicating electrically comprises: a pair of leads for each individual fluid dynamic resistive contact sensor, including one lead connected to the pressure-sensing diaphragm and a second lead connected to the base plate. 10. A wind turbine blade instrumentation structure for a fluid dynamic resistive contact sensor adapted for measurement of fluid dynamic parameters related to wind turbine blade performance, the structure comprising: a plurality of fluid dynamic resistive contact sensors, each of the plurality of fluid dynamic contact sensors comprising a diaphragm, a base plate and a pressure-sensitive conductive composite material formed of a polymer and a conductive filler, wherein the plurality of contact sensors are distributed according to a predetermined pattern on the surface of a wind turbine blade;a mounting structure for the plurality of fluid dynamic resistive contact sensors on the wind turbine blade, adapted to maintain the plurality of fluid dynamic resistive contact sensors fixed in place during wind turbine operation;means for communicating electrically a signal between the plurality of fluid dynamic resistive contact sensors on the blade and a data acquisition terminal, the means for communicating electrically comprising a pair of leads for each individual fluid dynamic resistive contact sensor, including one lead connected to the pressure-sensing diaphragm and a second lead connected to the base plate; andat least one of a trailing edge insert and a lightning protection system,wherein the means for communicating electrically further comprises connecting one common lead of the pair of leads for each fluid dynamic resistive contact sensor to at least one of the trailing edge insert and the lightning protection system. 11. The wind turbine blade instrumentation structure according to claim 10, wherein the trailing edge insert comprises: an electrically conductive material disposed along a trailing edge of the wind turbine blade;a longitudinal cavity channel adapted for carrying a signal lead of the pair of leads for each of the plurality of fluid dynamic resistive contact sensors; andaccess openings in the trailing edge insert for receiving the signal lead of the pair of leads for each of the plurality of fluid dynamic resistive contact sensors into the cavity channel. 12. The wind turbine blade instrumentation structure according to claim 10, wherein the means for communicating electrically further comprises a wirebundle within the blade internal and the pair of leads routed from an individual fluid dynamic resistive contact sensor, mounted in place within the surface of the blade during a process of blade bonding, through a skin of the blade and a core of blade to the wirebundle. 13. The wind turbine blade instrumentation structure according to claim 10, wherein the means for communicating electrically comprises wiring disposed along a surface of blade including the pair of leads from the individual fluid dynamic resistive contact sensors along a surface of the blade to a trailing edge and formed along the trailing edge. 14. The wind turbine blade instrumentation structure according to claim 10, wherein the means for communicating electrically comprises: a penetration disposed through a skin and a core of the blade in proximity to at least a portion of the plurality of individual fluid dynamic resistive contact sensors formed along a chord of the blade;a wirebundle within the blade adapted for electrical wiring to the individual contact sensors; anda pair of leads from each of the individual fluid dynamic resistive contact sensors formed along the chord of the blade, passing through the penetration in the blade and collected in the wirebundle within the blade. 15. The wind turbine blade instrumentation structure according to claim 1, the means for electrically communicating a signal comprising: a resistance value from the fluid dynamic resistive contact sensor in response to an ambient pressure, wherein the data acquisition terminal transfers the resistance value to a processor device adapted for converting the resistance value to a pressure value. 16. The wind turbine blade instrumentation structure according to claim 15, wherein pressure values for contact sensors along a chord of the blade are further processed by the processor device to determine blade performance characteristics including at least one of flow separation, stagnation point, angle of attack, lift and drag, wind speed. 17. The wind turbine blade instrumentation structure according to claim 1, wherein the pressure-sensing diaphragm and the base plate are formed from an electrically conductive material. 18. The wind turbine blade instrumentation structure according to claim 1, wherein the pressure-sensing diaphragm is vacuum sealed to the base plate. 19. The wind turbine blade instrumentation structure according to claim 1, further comprising an electrical insulator disposed between an outer peripheral section of the pressure-sensing diaphragm and the base plate. 20. The wind turbine blade instrumentation structure according to claim 1, wherein the pressure-sensitive conductive composite material extends between a first end and a second end, the first end being engaged against a top surface of the base plate and the second end being engaged against the pressure-sensing diaphragm.
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