A catenary balance line fault detection method based on dhog and discrete cosine transform

Abstract

The invention discloses a catenary balance line fault detection method based on DHOG and discrete cosine transform. The method includes two processes of identification and positioning of the balance line and its support and fault detection of the absence of the balance line: 1) The identification and positioning of the balance line and its support first needs to extract the DHOG features of the positive and negative samples, and then use the AdaBoost classifier to perform Training; then use the trained classifier to accurately judge whether the sliding detection window contains the target area. 2) The fault detection of the lack of balance line first uses discrete cosine transform to enhance the target feature information of the balance line and its support, and then uses the two-step method of circle detection based on arc segment fitting to count the circles in the image, according to The number of circles finally gives the fault judgment that the catenary balance line is missing. The method of the invention has a high detection accuracy rate, and still has good robustness in the case of rotation and scale changes of the target image, and provides a certain technical reference for the intelligent patrol inspection of the high-speed railway catenary.

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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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 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

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