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System and method for carrying out on-line monitoring on railway wheel-rail contact relationship on basis of structured light

A contact relationship and monitoring system technology, applied in the direction of railway vehicle testing, measuring devices, optical devices, etc., can solve the problem of not being able to accurately obtain the parameters of the wheel-rail contact geometric relationship, and achieve the effect of small size, fast speed and high precision

Inactive Publication Date: 2012-07-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiency that the prior art cannot accurately obtain the geometric relationship parameters of the wheel-rail contact, the present invention proposes a system and method suitable for on-line monitoring of the geometric parameters of the wheel-rail contact

Method used

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  • System and method for carrying out on-line monitoring on railway wheel-rail contact relationship on basis of structured light
  • System and method for carrying out on-line monitoring on railway wheel-rail contact relationship on basis of structured light
  • System and method for carrying out on-line monitoring on railway wheel-rail contact relationship on basis of structured light

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Embodiment 1

[0032] figure 1 Shown is a schematic diagram of the composition of the on-line monitoring system for wheel-rail contact relationship of this embodiment. The wheel-rail contact relationship online monitoring system is mainly composed of three parts: left detector 3, right detector 6 and processing system 5. The left detector 3 and the right detector 6 are respectively installed at the bottom of the car body 4, directly above the rail 1, and the processing system 5 is installed in the vehicle control cabinet. The left detector 3 and the right detector 6 respectively monitor the contact states of the left and right pairs of wheel rails, and the detection signals are sent to the processing system 5 for processing, identification, judgment, storage and output, and finally the required contact geometric parameters are obtained.

[0033] Such as figure 2 Shown is a schematic diagram of the composition and layout of the detector of this embodiment. The detector includes two line lasers...

Embodiment 2

[0038] This embodiment provides an on-line monitoring method of wheel-rail contact relationship using the system of embodiment 1, specifically: when the train is running, two line lasers simultaneously emit line lasers and irradiate the rail surface and the wheel surface respectively, and Two contour lines are formed on the surface of the rail and the surface of the wheel; the industrial camera continuously captures images of the monitoring area of ​​the rail and the wheel including the above two contour lines, and transmits the images in real time to the subsequent processing system for processing, and finally obtains the desired All of the wheel-rail contact geometric relationship parameters, so as to realize the online monitoring of the wheel-rail contact relationship.

[0039] In this embodiment, the above method for obtaining all required wheel-rail contact geometric relationship parameters is specifically as follows:

[0040] (1) Preprocess the images collected by the industr...

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Abstract

The invention discloses a system and a method for carrying out on-line monitoring on a railway wheel-rail contact relationship on the basis of structured light. The system comprises a left detector, a right detector and a processing system. Both left and right detectors respectively comprise two linear lasers and one industrial camera. Linear laser emitted by one linear lasers is irradiated onto the surfaces of steel rails and steel rail section contour lines are formed on the surfaces of the steel rails; linear laser emitted by the other linear lasers is irradiated onto the lateral surfaces of wheels and wheel section contour lines are formed on the surfaces of the wheels; and an image of a steel rail and wheel monitoring region comprising the contour lines are directly acquired by the industrial cameras, the image is transmitted to the processing system behind the industrial cameras to be processed, the image is processed, identified, judged, stored and output, and finally, required contact geometrical parameters are obtained. According to the invention, spatial positions of the steel rails and the wheels are synchronously acquired by adopting a structural light method so as to accurately acquire the wheel-rail contact geometrical parameters, thereby acquiring the actual condition of the wheel-rail contact relationship.

Description

Technical field [0001] The invention relates to a railway wheel-rail contact relationship measurement technology, in particular to a structured light-based on-line monitoring system and method of the railway wheel-rail contact relationship. Background technique [0002] The wheel-rail relationship is a unique contact relationship of wheel-rail transportation. During the operation of rolling stock, the position of the wheels relative to the track is constantly changing, so the wheel-rail relationship is time-varying and dynamic. Due to the particularity and complexity of the wheel-rail contact state, it is difficult to observe the wheel-rail contact state in operation by conventional means (whether it is quasi-static mechanical analysis or dynamic simulation analysis), and make accurate and accurate analysis. Comprehensive analysis and evaluation. [0003] Theoretical and experimental studies show that the nonlinearity of wheel-rail contact is extremely sensitive to the stability ...

Claims

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Application Information

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IPC IPC(8): G01B11/14G01B11/26G01M17/10
Inventor 赵辉陶卫刘伟文雷华明王梦雪杨金峰吴芳
Owner SHANGHAI JIAO TONG UNIV
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