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Non-contact contact line geometrical parameter detecting method

A technology of geometric parameters and detection methods, which is applied in the direction of measuring devices, instruments, and optical devices, can solve the problems of poor system flexibility and low detection efficiency of contact line geometric parameters, and achieve system stability, good flexibility and adaptability, The effect of simple algorithm

Inactive Publication Date: 2013-07-24
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a new non-contact contact line geometric parameter detection method based on image processing to solve the existing shortcomings of low contact line geometric parameter detection efficiency and poor system flexibility

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  • Non-contact contact line geometrical parameter detecting method

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Embodiment Construction

[0032] The embodiment of the present invention will be described in further detail below in conjunction with the actual pictures taken in the experiment.

[0033] combine figure 1 As shown, it is a schematic diagram of the detection device of the present invention. The beam of the detection vehicle is located directly above the center line of the track; the vertical beam of the laser is facing upwards, and the emitted laser area is larger than the maximum pull-out value of the contact line; the CCD camera and the beam present a fixed angle.

[0034] The working principle is: when the inspection vehicle is moving along the track, the laser emission line hits the contact line to form a brighter spot, and the CCD camera located at the rear end of the inspection vehicle will take pictures according to the set time interval. . With the difference of the height and position of the contact line, the position of the laser spot in the image has a corresponding presentation. By locat...

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Abstract

The invention discloses a non-contact contact line geometrical parameter detecting method. The method includes a first step of collecting high-definition images at equal time intervals by means of collection of control signals and finishing image preprocessing by means of the median filtering technique, the image graying technique and the like, a second step of locating a laser spot center point and extracting a coordinate of the center point by means of the iterative thresholding algorithm and a method of removing isolated noise in mathematical morphology, a third step of extracting a matched target region and detecting a transverse gray singular value of the target region, a fourth step of giving the wire height and a stagger value of a contact line by means of conversion from an image coordinate system to a camera coordinate system and from the camera coordinate system to a detection vehicle coordinate system, and compensating vibration of a vehicle body, and a fifth step of giving precise detection values of the wire height and the stagger value and displaying information of a plurality of parameters in a developed graphic monitoring interface. The method effectively improves detection efficiency of geometrical parameters of a contact net, simplifies the algorithm, improves precision of fault detection, and specifically improves safe reliability of the contact net of a high-speed train.

Description

technical field [0001] The invention relates to the field of high-speed railway detection, in particular to a novel non-contact contact line geometric parameter detection method based on image processing. Background technique [0002] In order to prolong the service life of the locomotive pantograph on electrified railways and make the sliding plate of the pantograph wear evenly, the contact wires are arranged in a zigzag shape in the straight line area of ​​the line. If the catenary pull-out value is set small, the purpose of uniform sliding wear and prolonging the life of the pantograph cannot be achieved; if it is set too large, in case of bad weather, the contact line will exceed the limit, resulting in bow scraping or bow drilling accidents, except Because of the looseness of hardware parts and tilting of pillars, etc., the pull-out value will also exceed the design value. The zigzag pull-out value is generally (480±10) mm, so the pull-out value of the catenary must be ...

Claims

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Application Information

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IPC IPC(8): G01B11/03G01B11/00
Inventor 刘志刚张桂南王韬韩志伟韩烨
Owner SOUTHWEST JIAOTONG UNIV
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