DHOG and discrete cosine transform-based overhead line system equilibrium line fault detection method

A discrete cosine transform, fault detection technology, applied in character and pattern recognition, instruments, computer parts and other directions, can solve the problem of increased vibration frequency of pantograph and catenary system

Inactive Publication Date: 2015-08-26
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0002] With the opening of a large number of new railway lines in China, China's railways are entering the operation and maintenance period from the large-scale construction period; in addition, due to the hig

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  • DHOG and discrete cosine transform-based overhead line system equilibrium line fault detection method
  • DHOG and discrete cosine transform-based overhead line system equilibrium line fault detection method
  • DHOG and discrete cosine transform-based overhead line system equilibrium line fault detection method

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Embodiment Construction

[0061] The embodiment of the present invention will be described in further detail below in conjunction with the actual pictures taken in the experiment.

[0062] combine figure 1 Shown: the detection flowchart of the method proposed in this paper of the present invention.

[0063] The main steps are as follows: firstly, the DHOG feature needs to be extracted from the image of the sample library, on this basis, the AdaBoost classifier is trained and the precise positioning of the balance line and its support is given; secondly, the discrete cosine transform is used to analyze the target feature information of the balance line and its support Enhancement; then based on the arc segment fitting, the circle in the image is detected and counted, and the fault criterion is given according to the statistical number, and finally the fault judgment of the missing balance line of the high-speed rail catenary is realized.

[0064] figure 2 It is a partial image of the high-speed railw...

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Abstract

The invention discloses a DHOG and discrete cosine transform-based overhead line system equilibrium line fault detection method. The method includes an equilibrium line and equilibrium line supporting seat recognition and positioning process and an equilibrium line default fault detection process. The equilibrium line and equilibrium line supporting seat recognition and positioning process includes the following steps that: DHOG feature extraction is performed on a positive sample and a negative sample; and an AdaBoost classifier is trained; and a classifier obtained through training is utilized to accurately judge whether a target area is contained in a slide detection window. The equilibrium line default fault detection process includes the following steps that: the target feature information of the equilibrium line and a supporting seat thereof is enhanced through utilizing discrete cosine transform; a two-step method which performs circle detection based on arc piecewise fitting is adopted to perform statistics on circles in an image; and an overhead line system equilibrium line default fault can be judged according the number of the circles. The DHOG and discrete cosine transform-based overhead line system equilibrium line fault detection method has the advantages of high detection accuracy and excellent robustness under a situation in which rotation and scale variation occur on the target image, and can provide a certain technical reference for intelligent inspection of high-speed rail overhead line systems.

Description

technical field [0001] The invention relates to the field of electrified railway detection, in particular to a catenary balance line fault detection method based on DHOG and discrete cosine transform. Background technique [0002] With the opening of a large number of new railway lines in China, China's railways are entering the operation and maintenance period from the large-scale construction period; in addition, due to the high-density operation of EMUs, the vibration frequency of the pantograph-catenary system has increased significantly, which poses a threat to the operation and maintenance of the catenary. brought a severe test. In order to ensure the safety of catenary equipment, it is necessary to carry out effective detection and status monitoring of catenary. In July 2012, the former Ministry of Railways promulgated the "Overall Technical Specifications for High-speed Railway Power Supply Safety Inspection and Monitoring System (6C System)". The power supply equi...

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/24G06F18/214
Inventor 高仕斌刘志刚张桂南
Owner SOUTHWEST JIAOTONG UNIV
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