Wind turbine generator blade root load strain gauge calibration method, device and equipment

The invention discloses a wind turbine generator blade root load strain gauge calibration method, device and equipment. The method comprises the steps that the blade mass, the blade gravity arm, the blade taper angle and the wind wheel elevation angle of a target blade in a wind turbine generator are acquired; calculating blade root gravitational torque according to the blade mass and the blade gravity arm; obtaining each original strain gauge signal group; calculating each theoretical bending moment group according to the blade root gravitational torque, the blade cone angle, the wind wheel elevation angle, the first wind wheel azimuth angle, the second wind wheel azimuth angle, the first pitch angle and the second pitch angle; substituting each original strain gauge signal group and each theoretical bending moment group into a theoretical value and original signal relational expression for linear regression fitting to obtain each initial coefficient group; carrying out mean value calculation on the same kin