Extraction method of insulators in power equipment based on visible light image of UAV line inspection

Abstract

The invention discloses a method for extracting insulators in electrical equipment based on an unmanned aerial vehicle line patrol visible light image. The method comprises the steps that the visible image of the electrical equipment is acquired; traversal is carried out on the whole visible image including the insulators, seed regions are detected through edge and texture information until no potential seed region exists, and Canny edge detection operators and a boundary connecting algorithm are used for extracting boundaries; after the seed regions are obtained, seed region expansion is carried out to obtain the complete insulators, the directions of the seed region expansion comprise single-ring upward expansion in the line direction, single-ring downward expansion in the line direction, single-pixel rightward expansion in the column direction and single-pixel leftward expansion in the column direction, and which direction the expansion is allowed to be carried out in is ensured through three factors of a measurement value based on textures, a measurement value based on edges and a similarity factor based on the textures. The seed regions are continuously expanded, and finally the complete insulators are obtained.

Description

technical field [0001] The invention belongs to a detection method of electric equipment applied in the field of electric power industry, and specifically refers to a method for extracting insulators in electric equipment based on visible light images of unmanned aerial vehicle line inspection. Background technique [0002] Insulators are an important part of overhead transmission lines, and their role is to support the wires and prevent current from returning to the ground. The current on-line detection methods for insulators mainly include: ① direct observation method, that is, use binoculars to observe surface defects of insulators, and sometimes need to climb towers for inspection. This method requires a large amount of maintenance, harsh operating conditions, and has caused certain hidden dangers to operating safety. ②Ultraviolet imaging method, the carbonization channel and erosion formed by the partial discharge on the surface of the composite insulator are detected ...

AI Technical Summary

Problems solved by technology

This method has a large amount of maintenance, harsh operating conditions, and has caused certain hidden dangers to operating safety.

②Ultraviolet imaging method, the carbonization channel and erosion formed by the partial discharge on the surface of the composite insulator are detected by the ultraviolet imager. The disadvantage of this method is that it needs to be operated in a positive temperature and high humidity environment, and it is easily affected by the observation angle.

The disadvantage of this method is that due to the complexity of the background of the transmission line corridor, there are a lot of interference in the general aerial image, which affects the noise, which makes the edge detection algorithm very complicated, which not only affects the extraction speed of the insulator image, but also affects the image accuracy.

Images