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

Patent metadata

Field	Value
Publication number	US-11686288-B2
Application number	US-201917043461-A
Country	US
Kind code	B2
Filing date	Nov 29, 2019
Priority date	Nov 29, 2018
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

Methods, apparatuses, and systems for collecting the installation error of the wind vane are provided. The image of the blades of the wind turbine and the outer rotor of the generator is obtained. It is determined whether the wind vane is aligned with the center line of the wind turbine, according to a relationship between the center line of the wind turbine and the orienting plane of the wind vane in the image. In a case that the wind vane is not aligned with the center line of the wind turbine, the deviation angle between the wind vane and the center line of the wind turbine is calculated, and a direction of the wind vane is corrected according to the deviation angle. Therefore, installation errors of the wind vane are accurately determined and corrected, and accuracy is improved for installation of the wind vane.

First claim

The invention claimed is:

1. A method for correcting an installation error of a wind vane, comprising:
obtaining an image, of blades of a wind turbine and an outer rotor of a generator;
obtaining 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;
calculating a center line of the 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;
obtaining 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;
obtaining an orienting plane of the wind vane;
determining 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
in a case that the wind vane is not aligned with the center line of the wind turbine:
calculating 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
correcting a direction of the wind vane, according to the deviation angle between the wind vane and the center line of the wind turbine.

2. The method according to claim 1 , wherein obtaining the contour of the blades of the wind turbine and the 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 comprises:
obtaining a grayscale image of the blades of the wind turbine and the outer rotor of the generator, according to the image of the blades of the wind turbine and the outer rotor of the generator;
performing edge detection on the grayscale image; and
performing contour detection on the grayscale image, according to a result of the edge detection.

3. The method according to claim 2 , wherein performing the edge detection on the grayscale image of the blades of the wind turbine and the outer rotor of the generator comprises:
denoising the grayscale image of the blades of the wind turbine and the outer rotor of the generator, through a Gaussian filter;
calculating gradient magnitude of a grayscale of each pixel in the grayscale image after the de-noising;
performing preset enhancement on the grayscale of each pixel, according to the gradient magnitude; and
determining an edge pixel of the blades of the wind turbine and the outer rotor of the generator, according to a relationship between the enhanced grayscale and a preset threshold.

4. The method according to claim 1 , wherein obtaining the orienting plane of the wind vane comprises:
obtaining a result of laser orientation on the wind vane; and
determining the orienting plane of the wind vane according to the result of the laser orientation.

5. The method according to claim 1 , wherein calculating the center line of the wind turbine comprises:
extending edge lines in the contour of the two blades of the wind turbine, to obtain an intersection point between the extended edge lines; and
connecting the intersection point between the extended edge lines, and a center point of the contour of the outer rotor of the generator, to obtain the center line of the wind turbine.

6. The method according to claim 1 , wherein calculating the 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 comprises:
obtaining an intersection point between the orienting plane of the wind vane and the contour of the outer rotor of the generator, as a second intersection;
calculating a quantity of pixels, which are between the first intersection point and the second intersection point, in the image of the blades of the wind turbine and the outer rotor of the generator, wherein the image is obtained by an image collecting apparatus fixed on the wind vane, and the image collecting apparatus is fixed at a head of the wind vane;
calculating a distance represented by each pixel in the image, according to a width of a view field of the image collecting apparatus and a quantity of pixels along a width direction of the image;
calculating a deviation distance, between the wind vane and the center line of the wind turbine, corresponding to each angle degree of the deviation angle, according to a distance between the image collecting apparatus and the outer rotor of the generator, wherein the distance between the image collecting apparatus and the outer rotor of the generator is obtained through ultrasonic distance measurement; and
calculating the deviation angle between the wind vane and the center line of the wind turbine, according to the distance represented by each pixel in the image and the deviation distance corresponding to each angle degree.

7. 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.

8. The apparatus according to claim 7 , wherein the contour obtaining module is configured to:
obtain a grayscale image of the blades of the wind turbine and the outer rotor of the generator, according to the image of the blades of the wind turbine and the outer rotor of the generator;
perform edge detection on the grayscale image; and
perform contour detection on the grayscale image, according to a result of the edge detection.

9. The apparatus according to claim 8 , wherein the contour obtaining module is configured to:
denoise the grayscale image of the blades of the wind turbine and the outer rotor of the generator, through a Gaussian filter;
calculate gradient magnitude of a grayscale of each pixel in the grayscale image after the de-noising;
perform preset enhancement on the grayscale of each pixel, according to the gradient magnitude; and
determine an edge pixel of the blades of the wind turbine and the outer rotor of the generator, according to a relationship between the enhanced grayscale and a preset threshold.

10. The apparatus according to claim 7 , wherein the alignment determination module is configured to:
obtain a result of laser orientation on the wind vane, and
determine the orienti

Assignees

• Beijing Goldwind Science & Creation Windpower Equipment Co Ltd

Inventors

• Wei Meng
• Yang Boyu
• Ye Amin

Classifications

• G06T2207/30164

  Workpiece; Machine component · CPC title

• G01P13/02

  Indicating direction only, e.g. by weather vane · CPC title

• G06T7/13

  Edge detection · CPC title

• F05D2270/8041

  Cameras · CPC title

• F03D7/047 Primary

  characterised by the controller architecture, e.g. multiple processors or data communications · CPC title