Device for optically measuring the curvature of a rotor blade of a wind power plant

摘要

This disclosure relates to a device for optically measuring the curvature of a rotor blade (18) of a wind power plant (1). The rotor blade is fixed at the blade root (23) to a rotor hub (8) or a rotor (6). The device includes at least one light-emitting external marking (33) fixed to the rotor blade (18) at a distance from the blade root (23), at least one camera (27) fixed to the rotor (6) for capturing the light (35) emitted from the external marking (33). The device provides first location information as a function of the relative position of the camera (27) with respect to the external marking (33). An evaluating device (37) is coupled to the camera (27), and a position detection means detects the relative location of the camera (27) with respect to the blade root (23) and provides second location information as a function of said relative location. The evaluating device (37) determines at least one variable characterizing the curvature of the rotor blade (18) while evaluating the position information.

主权项

1. A device for optically measuring the bending of a rotor blade of a wind turbine secured to a rotor hub of a rotor, where the rotor blade is secured at a blade root to the rotor hub, the device comprising:
a light-emitting external marking adapted to be secured to the rotor blade at a distance spaced from the blade root; a camera adapted to be secured to the rotor for receiving light emitted by the external marking and providing first position information dependent on a relative position of the camera with respect to the external marking; an evaluation device coupled to the camera and including a position detector which detects the relative position of the camera with respect to the blade root and provides second position information dependent on the relative position, wherein the evaluation device determines at least one variable characterizing the bending of the rotor blade by evaluating the position information; and wherein the camera is adapted to be secured to the rotor in a region of the blade root by a retention member, and wherein the position detector comprises a sensor secured to the retention member for detecting a shape change of the retention member, wherein the second position information provided by the position detector is dependent on the detected shape change, and wherein the sensor is selected from the group consisting of a tension sensor and an expansion sensor.