Patent ID: 8123478
Filing Date: 2012-02-28
Classification: F03D,F05B,Y02E,Y10S

Abstract:
1. A method for monitoring a condition of a rotor blade of a wind turbine, said method comprising: transmitting, from a plurality of sensors to a controller, at least one monitoring signal indicative of a vibration of the rotor blade, wherein the plurality of sensors includes a first sensor coupled to a support frame of the wind turbine for monitoring the vibration of the rotor blade; calculating, by the controller, a range of operating vibration frequency values indicative of a normal operation of the rotor blade based at least in part on the monitoring signal; calculating, the condition of the rotor blade based on the monitoring signal; and, determining the calculated condition of the rotor blade to be less than a predefined condition when a sensed vibration frequency is different than the calculated range of operating vibration frequency values.