An optical imaging detection method for an electrified railway catenary support device
A technology for electrified railways and supporting devices, applied in the direction of measuring devices, optical devices, instruments, etc.
Inactive Publication Date: 2016-04-13
北京和润科仪科技有限公司 +1
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At present, at home and abroad, there are many kinds of detection systems that use imaging methods to capture catenary support devices, but they all use manual viewing for fault inquiry. Due to the complexity of the support positioning device itself, the method of using image detection to realize fault detection is still Not yet mature, the method proposed by the present invention fills the gap in the domestic imaging detection method for the defects of the supporting positioning device of the electrified railway catenary
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[0170] For the detection of global parameters, it is first necessary to preprocess the image and then perform feature extraction. In the present invention, the insulator is firstly extracted, and then the identification and detection of each rod is carried out according to the constraint relationship between the insulator and each rod, and finally the relative angle between each rod and the distance of each intersection point relative to the insulator are calculated, and passed The distance value and angle value obtained from the two before and after cameras are used to judge whether the rod structure has changed. It is found through experiments that to achieve the same result, the speed of the region extraction algorithm combined with the line detection algorithm is much faster than that of the simple line detection algorithm. The present invention only describes the first method in detail.
[0171] Step 1: Image preprocessing:
[0172] Considering the particularity of the i...
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The invention provides an optical imaging detection method of an electrified railway overhead line system supporting device and belongs to the technical field of electrified railway safety detection. The optical imaging detection method of the electrified railway overhead line system supporting device is characterized in that after average filtering and binaryzation are conducted on a global picture of the overhead line system supporting device, an overall structure of the supporting device is extracted therefrom, and an upper insulator, a lower insulator, a horizontal cantilever, an oblique cantilever, an oblique support, a positioning pipe and a positioner are recognized according to shape characteristics of the overall structure, the coordinate position of the overall structure and the like. A linear equation which the overall structure is in is obtained in a fitting mode through a straight line fitting algorithm, each included angle between every two rod pieces is figured out and each included point of every two rod pieces is figured out. The distance between each included point and the upper insulator and the distance between each included point and the lower insulator are calculated then. Each distance and each included angle are used as parameters, and data after a first time of imaging processing and data after a second time of imaging processing are compared. Whether the value after comparison exceeds a certain threshold value is used as a condition to judge whether a fault defect exists or not, so that automatic detection of a fault caused by comprehensive action of intervention tension force and impact force in the overhead line system supporting device is achieved.
Description
technical field [0001] The invention belongs to the technical field of safety detection of electrified railway catenary, and in particular relates to the computer detection technology of each component in a supporting device. Background technique [0002] With the further development of high-speed railway transportation technology and its wide application, the catenary of high-speed railway, as an important facility to provide electric energy to locomotives, has attracted more and more attention whether it is in a safe working state. In order to ensure that the catenary is in good working condition and facilitate the safe operation of the electrified railway, catenary faults should be detected and dealt with as early as possible. In practice, catenary failures are mainly caused by loose, detached, missing, and cracked parts. At present, the general processing mode is to manually go online for inspection during skylight operations. However, due to limited site conditions and ...
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IPC IPC(8): G01B11/00G01B11/02G01B11/26
Inventor 王涟王苹王学武王翠娟唐小林李先军
Owner 北京和润科仪科技有限公司