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Method and system for positioning insulators and method and system for fault detection

An insulator, rough positioning technology, applied in the direction of optical testing flaws/defects, etc., can solve problems such as identification of missing and inter-chip foreign objects

Active Publication Date: 2015-07-08
CHENGDU TANGYUAN ELECTRICAL APPLIANCE +1
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Problems solved by technology

[0010] Aiming at the technical problem that the insulator positioning method in the prior art relies heavily on brightness and enamel reflection characteristics, and can only be applied to porcelain insulators with better quality for night shooting, the present invention discloses a method and system for positioning insulators Aiming at the technical problem that the insulator fault detection method in the prior art can only identify large-scale defects such as missing and foreign matter between sheets, and is not sensitive to damage and flashover with a small area, the present invention discloses a fault detection method for insulators method and system

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  • Method and system for positioning insulators and method and system for fault detection

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] The invention discloses a method for locating an insulator, which specifically includes the following steps: step 1, using a catenary inspection device to take an image of the insulator in the inspection line support device; step 2, taking the gradient direction histogram of each part in the image The image description sub-features are matched with the insulator feature library, and the local image after rough positioning is output according to the matching result, and the local image includes the insulator and its surrounding background; step 3, the local image after the rough positioning is preprocessed to obtain the binarized Insulator image; step 4, take the edge line of the image output in step 3, and extract the part of the periodic change in the gray waveform of the edge line, and at the same time combine the contou...

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Abstract

The invention relates to the technical field of image processing of overhead contact lines and discloses a method for positioning insulators. The method specifically includes the following steps that the image of the insulators in a routing inspection line supporting device is shot; description sub-features of the gradient direction histrogram of all parts in the image are matched with an insulator feature library, and a roughly positioned local image is output according to a matching result; the roughly positioned local image is pre-processed; edge lines of the output image are taken, the periodically changed parts in gray waveforms of the edge lines are extracted, and the insulators are accurately positioned through a contour extracting algorithm; the insulators are extracted. The insulators in the image are accurately positioned according to the light and shade spaced periodical change features of the insulators in the image. The method does not depend on light reflection features of brightness and ceramic glaze and is suitable for both night shooting and daytime shooting, high in positioning accuracy and small in scene light dependency.

Description

technical field [0001] The invention relates to the technical field of image processing of high-speed railway catenary, in particular to a method and system for locating insulators in the catenary image, and a fault detection method and system. Background technique [0002] During the 12th Five-Year Plan period, my country has become the largest country in the world in terms of high-speed railway mileage. The rapid development of high-speed railways and the demand for operational quality have put forward higher requirements for the safe operation of railway traction power supply system equipment. The catenary is the key equipment of the electrified railway traction power supply system. It has the characteristics of open-air setting, dynamic work, and no backup along the line, so it is also the weakest link in the traction power supply system. Once a fault occurs, it will directly affect the normal operation of the traction power supply system, and even endanger the safety of...

Claims

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Application Information

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IPC IPC(8): G01N21/88
Inventor 王嵩杨亚明张庆敏
Owner CHENGDU TANGYUAN ELECTRICAL APPLIANCE
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