Method for measuring deformation of rotor blade of wind-power plant, involves determining frequency range of mechanical natural oscillation of position detection device, and determining deformation of blade based on frequency range

摘要

The method involves detecting a starting position (6) of a positioning mark (17) at a rotor blade with a position detection device (16), and detecting operating position (7) of the mark at the rotor blade by the detection device. A frequency range of a mechanical natural oscillation of the detection device is determined or detected by a vibration sensor or by rotation rate sensor and used during the determination of deformation of the rotor blade. The frequency rage of the oscillation is determined in a learning phase and/or during operating phase of a wind power plant. Independent claims are also included for the following: (1) a device for measuring deformation of a rotor blade (2) a wind power plant.