Patent ID: 7954372

Claim:
A method for diagnosis of blades and associated components, said method being characterized in that it is a method for diagnosis of at least one possible fault associated with pitch and/or load, the method comprising: a) making load and pitch measurements by using any one or both of the following two procedures: i) at a desired azimuth angle, measuring the load at a set of pitch angles (θ), and/or ii) at a desired pitch angle, measuring the load at a set of azimuth (δ) angles, and then repeating measuring the load at a set of azimuth (δ) angles at one or more pitch reference angles (θ ref ); b) deriving a relation between the measurements of loads and pitch angles; and c) comparing said load-pitch or pitch-load relation with an expected load-pitch or pitch-load relation in order to determine whether at least one possible fault with the blade (B 1 ;B 2 ;B 3 . . . ) and/or the blade sensor(s) is present.