Method, device and system for correcting installation errors of wind vane

An apparatus for correcting an installation error of a wind vane, comprising:

• an image obtaining module, configured to obtain an image, of blades of a wind turbine and an outer rotor of a generator;
• a contour obtaining module, configured to obtain a contour of the blades of the wind turbine and a contour of the outer rotor of the generator, from the image of the blades of the wind turbine and the outer rotor of the generator;
• a center line calculation module, configured to calculate a center line of a wind turbine, according to the contour of the outer rotor of the generator and a contour of two blades in the blades of the wind turbine;
• a first intersection point obtaining module, configured to obtain an intersection point between the center line of the wind turbine and the contour of the outer rotor of the generator, as a first intersection point;
• an alignment determination module, configured to obtain an orienting plane of the wind vane, and determine whether the wind vane is aligned with the center line of the wind turbine, according to the center line of the wind turbine and the orienting plane of the wind vane;
• and
• an angle correction module, configured to:
• determine that the wind vane is not aligned with the center line of the wind turbine,
• calculate a deviation angle between the wind vane and the center line of the wind turbine based on the orienting plane of the wind vane and the first intersection point, and
• correct a direction of the wind vane according to the deviation angle between the wind vane and the center line of the wind turbine.

A system for correcting an installation error of a wind vane of a wind turbine, wherein:

• the wind turbine comprises a nacelle, a wheel hub, a generator and a wind vane, the wheel hub comprises three blades, the generator is disposed between the nacelle and the wheel hub, the wind vane is disposed on top of the nacelle, and a head of the wind vane points toward the wheel hub;
• the system comprises:
• an image collecting apparatus, detachably disposed at the head of the wind vane, wherein the image collecting apparatus is configured to acquire an image of blades of the wind turbine and an outer rotor of the generator;
• and
• a processor, in communications connection with the image collecting apparatus;
• and
• the processor is configured to:
• obtain the image of blades of the wind turbine and the outer rotor of the generator;
• obtain a contour of the blades of the wind turbine and a contour of the outer rotor of the generator, from the image of the blades of the wind turbine and the outer rotor of the generator;
• calculate a center line of a wind turbine, according to the contour of the outer rotor of the generator and a contour of two blades in the blades of the wind turbine;
• obtain an intersection point between the center line of the wind turbine and the contour of the outer rotor of the generator, as a first intersection point;
• obtain an orienting plane of the wind vane, and determine whether the wind vane is aligned with the center line of the wind turbine, according to the center line of the wind turbine and the orienting plane of the wind vane;
• and
• determine that the wind vane is not aligned with the center line of the wind turbine, calculate a deviation angle between the wind vane and the center line of the wind turbine based on the orienting plane of the wind vane and the first intersection point, and correct a direction of the wind vane according to the deviation angle between the wind vane and the center line of the wind turbine.