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Rapid fuzzy matching method for testing bad conditions of high-speed rail catenary rod type insulators

A technology of fuzzy matching and bad state, which is applied in the direction of optical testing flaws/defects, image data processing, instruments, etc. It can solve problems such as complex images, and achieve high matching accuracy and good robustness

Inactive Publication Date: 2013-05-01
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a lot of work has been done on the detection of insulators, there are no relevant reports at home and abroad on the detection and analysis of high-speed rail catenary rod insulators directly through image processing methods due to the complexity of the images of catenary suspension devices.

Method used

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  • Rapid fuzzy matching method for testing bad conditions of high-speed rail catenary rod type insulators
  • Rapid fuzzy matching method for testing bad conditions of high-speed rail catenary rod type insulators
  • Rapid fuzzy matching method for testing bad conditions of high-speed rail catenary rod type insulators

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Embodiment Construction

[0051] Embodiments of the present invention will be described in further detail below in conjunction with the actual pictures taken on the Wuhan-Guangzhou high-speed railway.

[0052] figure 1 Composition block diagram for the method of the present invention.

[0053] A. The present invention performs corresponding conversion processing on the template image in the matching process to obtain the required horizontal template, 30° template, and 60° template; as shown in FIG. 2 .

[0054] B. Normalized cross-correlation function fuzzy matching to locate insulators:

[0055] a. The present invention introduces the normalized cross-correlation function method to locate the target rod insulator. The normalized cross-correlation algorithm is based on the classic algorithm in grayscale image matching technology, with high matching accuracy and good robustness.

[0056] Assume that the pixel size of the image of the insulator I to be matched is M×N, and the pixel size of the templat...

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Abstract

The invention discloses a rapid fuzzy matching method for testing bad conditions of high-speed rail catenary rod type insulators. The method comprises the following steps: performing corresponding deformation treatment for a selected template image, and layering an image and a template by a pyramid neighbor average algorithm; performing normalized cross-correlation calculation for the layered image and the template, and extracting a peak point to achieve rapid fuzzy matching; then extracting a matched target area, and detecting a transverse grey singular value of the target area; and finally, judging bad conditions of the rod type insulators accurately. According to the method, the calculation amount of the normalized cross-correlation is effectively reduced, the image matching speed is accelerated, the fault diagnosis difficulty is simplified, the fault detection accuracy is improved, and safe operation problems of the high-speed rail catenary can be specifically solved.

Description

technical field [0001] The invention relates to the field of image intelligent detection, in particular to the technical field of improving the rapidity of image matching and the accuracy of fault detection. Background technique [0002] In order to ensure the normal operation of the EMU, the high-speed railway traction power supply line must meet two basic conditions. One is to provide mechanical support for the wires that transmit the current; the other is to prevent the current from forming a channel to the ground, and the insulator has these two functions. Insulators play an important role in transmission lines. The insulators on the contact line are subjected to mechanical load, strong electric field and environmental climate for a long time, which will cause different degrees of damage to the insulators. Once the insulator is damaged, it will reduce or even lose its insulation capacity, resulting in faults such as line short circuit and insulation breakdown of the cat...

Claims

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Application Information

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IPC IPC(8): G01N21/88G06T7/00
Inventor 刘志刚张桂南郭晓旭韩烨杨红梅
Owner SOUTHWEST JIAOTONG UNIV
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