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Automatic detection method of steel rail light band abnormity based on digital image processing

A digital image and rail technology, applied in the field of track stability performance measurement, can solve the problems of missed detection and false detection of track stability, difficult to effectively guarantee the safety of trains, etc., to ensure accuracy, reduce detection time, and ensure safety. Effect

Inactive Publication Date: 2012-08-08
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, because people are in a state of fatigue at night, coupled with light and other reasons, it is easy to miss and falsely detect the detection of track stability.
This makes it difficult to effectively guarantee the safety of trains at high speeds.

Method used

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  • Automatic detection method of steel rail light band abnormity based on digital image processing
  • Automatic detection method of steel rail light band abnormity based on digital image processing
  • Automatic detection method of steel rail light band abnormity based on digital image processing

Examples

Experimental program
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Effect test

Embodiment

[0048] The following is an example step description of the present invention:

[0049] 1) The actual measurement of a large number of normal rail surface areas is carried out manually, and the width of the light band area and the width of the non-light band areas on both sides are measured with a scale, and the width threshold of the light band area is obtained according to a large amount of statistical data (according to actual measurement , obtain the width threshold value between 0.5 and 0.6), then calculate the fluctuation value of the light band edge in each section of rail area according to the variance, and obtain the ripple threshold value of the light band area (according to actual measurement, the ripple threshold value is less than 0.01);

[0050] 2) The acquisition of rail images is as follows: figure 2 As shown, use Canny edge detection to get the edge image of the rail image;

[0051] 3) For the rail edge image obtained in step 2, use Smooth smoothing (i.e., ca...

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Abstract

The invention discloses an automatic detection method of steel rail light band abnormity based on digital image processing, comprising the following steps of: analyzing track images taken with a camera by the adoption of a digital image processing technique and detecting whether a steel rail light band is abnormal or not; preliminarily positioning a steel rail area in the images by the utilization of methods of image enhancement, edge detection, line detection and the like; extracting the light band area on the top of the steel rail through methods of pattern recognition, image segmentation, threshold processing and the like; and finally carrying out statistics and analysis on the extracted steel rail light band area and identifying whether it becomes abnormal or not. The method provided by the invention can be used to efficiently, automatically and intelligently detect stability of the steel rail, effectively minimize manpower input, reduce detection time, guarantee detection accuracy and effectively guarantee safety during high-speed operation of trains.

Description

technical field [0001] The invention relates to track stability performance measurement, in particular to a method for collecting rail images and detecting whether the rail light band is abnormal in the rail stability monitoring of high-speed railways. Background technique [0002] With the development of high-speed railways, trains run faster and faster, and the requirements for track stability continue to increase. However, affected by factors such as railway construction, geographical environment, and train operation, it is inevitable that there will be problems with the stability of the track. Since the stability of the track will directly affect the safety of the train, the detection of the track stability is related to the safety of people's lives and properties. [0003] Generally, the detection of track stability is judged by the light band left on the rail during the train operation. The rail light strip refers to the bright marks left on the rail when the train w...

Claims

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Application Information

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IPC IPC(8): G01N21/956G01B11/02G06T7/00G06T5/00
Inventor 陈俊周关大成彭强
Owner SOUTHWEST JIAOTONG UNIV
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