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Power transmission line tower cross arm bolt defect detection method

A technology of defect detection and detection method, applied in the field of defect detection, can solve the problems of blank, difficult to obtain detection effect, threatening the security of high-voltage power grid, etc.

Inactive Publication Date: 2017-05-17
GUANGDONG UNIV OF TECH
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Problems solved by technology

However, the research on the bolt defect detection technology at the cross arm of the transmission line tower is very little, or even blank.
At the same time, due to the complex background of the picture, it is difficult to obtain a satisfactory detection effect
Bolts are important components in power transmission lines. Once there is a hidden danger of failure, it will directly threaten the safety of the high-voltage power grid and even cause incalculable losses.

Method used

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  • Power transmission line tower cross arm bolt defect detection method
  • Power transmission line tower cross arm bolt defect detection method
  • Power transmission line tower cross arm bolt defect detection method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0028] Image preprocessing: Since there is no perfect state, various noises will inevitably be introduced during the image acquisition process, which not only hinders the senses, but also hinders the understanding and analysis of subsequent image source information, causing errors in the processing results. Before image processing, the obtained target image is generally denoised. Filtering is a concept in signal processing, the purpose is to filter out the frequency of a specific band in the signal, which is a classic processing method in denoising.

[0029] Adaptive median filtering: The effect of median filtering depends on the size of the filtering window. If it is too large, the edge will be blurred, and if it is too small, the denoising effect will be poor. Because noise points and edge points ...

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Abstract

The invention relates to a power transmission line tower cross arm bolt defect detection method. Most of unmanned aerial vehicle power transmission line inspection technology-based research is about detection of defects such as strand fracture and insulator missing of conductors, while, research about power transmission line tower cross arm bolt defect detection technologies is rare, and even blank; and since picture background is complex, it is difficult to obtain a satisfactory test result. Bolts are important parts of power transmission lines, once potential failure exist on the bolts, the safety of a high-voltage power grid will be directly threatened, and incalculable losses can be even brought about. In order to solve the problems, the invention provides an aerial image-based tower cross arm bolt defect detection method. The method mainly comprises aerial image preprocessing, bolt region positioning and bolt defect detection.

Description

technical field [0001] The invention relates to a method for detecting defects, in particular to a method for detecting defects of bolts at cross-arms of transmission line poles and towers. Background technique [0002] Economic development not only increases the load of urban and rural power grids rapidly, but also puts forward higher requirements for the reliability and quality of power supply. my country's power line corridors often need to cross various complex geographical environments, frequently pass through lakes, reservoirs and mountains, etc. The transmission line has a large coverage, wide distribution area, long transmission distance, complex and changeable geographical conditions, and is affected by the environment and climate. Significant and other characteristics have brought great challenges to the daily operation, maintenance and inspection of the line. [0003] The inspection of transmission lines generally adopts the manual inspection method. Although this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/12G06T7/136G06T7/194G06T7/168G01N21/88
CPCG01N21/8851G01N2021/8887G06T7/0004G06T2207/20061G06T2207/30108
Inventor 黄志文张学习
Owner GUANGDONG UNIV OF TECH
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