A method for detect edge of pantograph slide plate of urban rail train

A pantograph slide and edge detection technology, which is applied in image analysis, image enhancement, instruments, etc., can solve the problems of weakening edge information, noise sensitivity, and the influence of edge finalization, so as to improve the detection accuracy, the detection results are obvious, and the detection precise effect

Inactive Publication Date: 2019-02-26
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, Canny edge detection has the following defects: (1) In the first step of Gaussian filtering, the edge information is also weakened while filtering out the image noise, and some edges with inconspicuous features are missed; (2) The amplitude is calculated in the second step and gradient process, use 2×2 field to calculate gradient and amplitude, this method is very sensitive to n...

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  • A method for detect edge of pantograph slide plate of urban rail train
  • A method for detect edge of pantograph slide plate of urban rail train
  • A method for detect edge of pantograph slide plate of urban rail train

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Embodiment 1

[0063] Using the edge detection method of the pantograph slide plate of the urban rail train of the present invention, the improved edge detection operator is experimentally analyzed, figure 2 It is the image of the left half of the pantograph collected by the image acquisition system. The traditional Canny operator and the adaptive Canny operator are respectively used for edge detection processing. The result is as follows image 3 , Figure 4 .

[0064] combine image 3 , Figure 4 , when the improved Canny operator is used to extract the image edge, the noise filtering effect is better, and the improved edge detection map has fewer false edges, and the image is clearer, which is beneficial to image edge connection and improves the detection accuracy of the system .

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Abstract

The invention discloses a method for detecting the edge of a pantograph slide plate of a city rail train. At first, that gray image signal of the pantograph slide plate is obtained, and the image signal is convolution with a Gaussian convolution kernel with adaptive size; Then the gradient magnitude and direction of the filtered image are calculated by the gradient operator in the 8 neighborhoodsof 3*3. Finally, the gradient amplitude is suppressed by non-maximum method, and the edge image of pantograph skateboard is obtained by double threshold adaptive extraction and edge connection. The invention is based on an improved Canny operator, and has obvious detection result and strong applicability.

Description

technical field [0001] The invention belongs to the technical field of pantograph fault detection, in particular to a method for detecting the edge of a pantograph slide plate of an urban rail train. Background technique [0002] With the improvement of train speed and the increase of operating mileage, the safety performance of trains is becoming more and more important. The pantograph is generally installed on the top of the train, and is in sliding contact with the contact line during operation, and obtains electric energy from the contact line. It is an important part for the train to obtain reliable electric energy during operation. The carbon skateboard is a key part of the train pantograph system to obtain electric energy. During the operation of the train, the carbon skateboard is susceptible to wear. Once the wear exceeds the warning value, it will cause serious traffic accidents. [0003] John F.Canny proposed the Canny edge detection operator, which belongs to th...

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Application Information

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IPC IPC(8): G06T7/13G06T5/00G06T5/20G06T5/40
CPCG06T5/002G06T5/20G06T5/40G06T2207/10024G06T2207/30252G06T7/13
Inventor 郎宽邢宗义
Owner NANJING UNIV OF SCI & TECH
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