Patent ID: 9657720
Date: 2017-05-23
CPC Classifications: F03D,F05B,G01B,G01M,G02B,Y02E

Claim:
1. A sensor device for measuring aerodynamic loads of a wind turbine rotor blade comprising: a reflector arranged in a cavity of a rotor blade extending from a rotor hub; a signal evaluation device arranged at a distance from the reflector and operable to receive a signal from the reflector, the signal evaluation device detecting and quantifying a physical change of the rotor blade from the reflector signal; and a cleaning device associated with the reflector for cleaning the reflector, the cleaning device activated by a centrifugal force during rotation of the rotor hub; and wherein the cleaning device is operable for activation when the rotor hub is rotating slowly and deactivation when the rotor hub is rotating quickly.