Method for temperature calibration of blade strain gauges and wind turbine rotor blade containing strain gauges

摘要

A method for temperature calibration of a strain sensor (160) for a rotor blade (110) of a wind turbine (100) is provided, the method including operating the wind turbine (100) in a mode in which substantially no bending of the rotor blade (110) due to wind occurs, repeatedly measuring gravitationally induced bending moments of the rotor blade (110) for a plurality of temperatures measured at the place of the strain sensor (160), determining a temperature dependency of the strain sensor (160) on the temperature, calibrating the strain sensor (160) based on the determined temperature dependency of the strain sensor (160) such that the temperature dependency of the strain sensor (160) is compensated.