G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 21/32 (2006.01) F03D 7/00 (2006.01) F03D 11/00 (2006.01) G01B 11/16 (2006.01) G01B 15/06 (2006.01) G01B 17/04 (2006.01) G01M 13/00 (2006.01) G01S 13/88 (2006.01) G01S 15/88 (2006.01) G01S 17/88 (2006.01) G01S 13/08 (2006.01)
Patent
CA 2698878
The invention relates to a method and arrangement to measure the deflection of a blade of a wind-turbine. The blade comprises a cavity inside the blade. A reflector, which is located inside the cavity of the blade, is coupled by a wire-less signal with a distance-measurement-device. The distance--measurement-device uses the wireless signal to measure the distance between the distance-measurement-device and the reflector. A line of sight is established and maintained between the distance-measurement-device and the reflector even when the blade is deflected. The reflector is inclined relative to the line of sight in a way, that a lateral movement of the reflector relative to the line of sight results in a change of the distance between the distance-measurement--device and the reflector, while the lateral movement is caused by an deflection of the blade. The distance--measurement-device is designed to measure the change of the distance, which is used to determine the deflection of the blade.
Aktiengesellschaft Siemens
Smart & Biggar
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