Sleeper bolt detection method

A detection method and technology for bolts, which are applied to measurement devices, instruments, and optical devices, can solve the problems of inability to collect bolt profiles, cumbersome calibration process, and easy blocking of laser lines, so as to ensure the real-time performance and robustness of the system. , the effect of improving the detection speed

Active Publication Date: 2019-09-13
ZHUZHOU TIMES ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a sleeper bolt detection method to solve the problem that the detection method based on the existing sleeper bolt detection method not only has a complex structure, high cost, and cumbersome calibration process, but also has a large angle between the camera and the laser. , the background object whose height exceeds the bolt can easily block the laser line, so the bolt profile cannot be collected, which leads to missed detection. At the same time, there is a technical problem of mileage accumulation error in the positioning of the forward direction by using the line scanning image acquisition method

Method used

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Examples

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Effect test

Embodiment 1

[0067] as attached figure 1 And attached figure 2 Shown, a kind of embodiment of sleeper bolt detection method of the present invention, specifically comprises the following steps:

[0068] A) Obtain the position to be collected of the sleeper bolt image; first, the device is initialized, and the position to be collected of the first frame of the sleeper bolt image is the assignment when the sleeper bolt detection device 10 performs system initialization, when the current position of the image acquisition reaches the first frame of sleeper Collect a frame of image when the position of the bolt image is to be collected, and record the width W, height H of the collected image plane, and the current shooting position S 0 ;

[0069] As a preferred embodiment of the present invention, if the sleeper bolts are detected in the first frame of sleeper bolt images collected, it is judged that the sleeper bolt image acquisition position is the position of the sleeper bolts; if the fir...

Embodiment 2

[0104] as attached image 3 As shown, an embodiment of a sleeper bolt detection device based on the method described in Embodiment 1 specifically includes:

[0105] The collection module 1 is triggered to obtain the position to be collected of the sleeper bolt image. The trigger acquisition module 1 is mainly composed of a position sensor, a logic circuit, etc., and can obtain position information with different precisions through configuration, and transmit reference information such as multiple trigger signals and trigger indexes at the same time.

[0106] The image acquisition module 2 acquires the plane image data of the sleeper bolts 5 according to the position to be acquired. The image acquisition module 2 further includes a light source 30 and a camera 40 , and the image acquisition module 2 acquires planar image data of the sleeper bolts 5 according to the trigger pulse sent by the trigger acquisition module 1 . When the current position of the image acquisition modu...

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Abstract

The invention discloses a sleeper bolt detection method. The method comprises the following steps of step A), acquiring a to-be-collected position of a sleeper bolt image; step B), acquiring plane image data of a sleeper bolt according to the to-be-collected position; step C), acquiring a shape description from the plane image data of the sleeper bolt, and identifying a bolt area according to theshape description; step D), calculating the center offset of the sleeper bolt identified as the bolt area, and obtaining the to-be-collected position of the next frame of sleeper bolt image; and stepE), outputting the center offset of the sleeper bolt and updating the to-be-collected position. The sleeper bolt detection method provided by the invention can solve the technical problems that the detection device for an existing sleeper bolt detection method is not only complicated in structure, higher in cost and cumbersome in the calibration process, in addition, due to the fact that a large angle exists between a camera and a laser, the height of the camera is larger than that of a background object of the bolt, a background object whose height exceeds the bolt can easily block a laser line, so that a bolt profile cannot be collected, so that missed inspection is caused; and meanwhile, a line scanning image acquisition method has a certain mileage cumulative error for the positioningof the forward direction.

Description

technical field [0001] The invention relates to the technical field of visual image detection, in particular to a sleeper bolt position detection method applied in the field of rail transit. Background technique [0002] The position detection of sleeper bolts is an important part of railway line maintenance operations. It is mainly used to obtain the offset Y of the sleeper bolts relative to the working device along the track advancing direction, the offset X of the vertical track direction, and the height offset. Z. The position information of the sleeper bolts can be used to guide the rail-changing operation of the rail-changing car, the oiling operation of the sleeper bolt oiling trolley, the automatic tightening operation of the sleeper bolts, and the automatic tamping operation and other automated operations. [0003] At present, the detection methods of sleeper bolts mainly include manual visual inspection, contact switch or metal sensor detection, 3D point cloud det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 邱新华王文昆薛双纲关伟蔡培尧曹辉季育文张磊聂肃
Owner ZHUZHOU TIMES ELECTRONICS TECH CO LTD
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