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Vehicular wheel out-of-roundness detection method

A vehicle-mounted, wheel technology, applied in the direction of rim measurement/measurement, can solve the problems of inability to detect wheel out-of-roundness, occupying a long turnaround time, low efficiency, etc., and achieve the effect of improving the standstill operation method, reducing the cost, and making the device light and convenient.

Inactive Publication Date: 2015-05-13
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical solution adopted by the present invention to solve the technical problem is: in order to overcome the inefficiency, poor reliability, long turnaround time of the existing traditional wheel out-of-roundness detection equipment, and the inability to detect the out-of-roundness of the wheel in normal driving, the present invention The principle of the invention is that the thin strip light source lighting system irradiates the wheel surface along the normal direction of the tread to form a light section curve from the rim to the tread——reflecting the cross section of the wheel’s external dimensions

Method used

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  • Vehicular wheel out-of-roundness detection method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. A vehicle-mounted method for detecting out-of-roundness, which consists of a semiconductor laser, a laser bracket, a laser support seat, and a laser gasket; wherein: the semiconductor laser (3) passes through the laser bracket (4), the laser support seat (8) Installed at the bottom of the side frame (18) of the steering gear, the semiconductor laser (3) has small volume, low energy consumption, good monochromaticity of emitted laser light, high brightness and strong anti-interference ability. A laser with an exit pupil power of 20mw is selected. The distance between the laser installation position and the rail surface is about 100mm AC, so that the laser is free from ballast. The working distance BF of the semiconductor laser (3) is about 600mm. The plane BCF where the laser is located is coplanar with the plane BCFO, so that the line light source can irradiate the tire part of the wheel along the radial direction of the wheel, forming a light section curv...

Embodiment 2

[0018] Embodiment 2. A vehicle-mounted method for detecting out-of-roundness, consisting of an ultra-high-speed area array CCD camera, a filter, a camera bracket, a camera support seat, and a camera gasket; wherein: the high-speed area array CCD camera (1) passes through the camera The bracket (5) and the camera support seat (2) are installed at the bottom of the side frame (18) of the steering gear, and the running speed of an ordinary train is about 120km / h, that is, it takes 3x10 hours to travel 1mm. -5 s, the high-speed area array CCD camera (1) can use Phanton v710 monochrome CCD, which can achieve 7500 frames / s image acquisition under the full-scale 1024×800 pixels, and the maximum can be achieved by reducing the number of recorded pixels (reducing the spatial resolution). Up to 700,000 frames / s, that is, the camera needs 1.43 x10 -6 s, which can meet the error requirement that the width of the light section curve is less than 1mm. The camera is adjusted to the interlace...

Embodiment 3

[0019] Embodiment 3. A vehicle-mounted method for detecting out-of-roundness, which is composed of a relay module and a locomotive control room; wherein: the relay module (7) is composed of a single-chip microcomputer and a digital transmission station, and the relay module is fixed on the bogie The bottom of the side frame (18) is connected to the high-speed area array CCD camera (1) through the data transmission line (6). The format is saved in the specified location in the hard disk, and then the image in the hard disk is processed by image processing software to obtain the real shape curve of the wheel.

[0020] Working method of the present invention is as follows:

[0021] Before testing the wheel out-of-roundness, preparations must be made. The operator checks whether the semiconductor laser and the high-speed area array CCD camera are normal. After the train stops, install the vehicle-mounted out-of-roundness detector on the bottom of the side frame of the bogie. . T...

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Abstract

The invention discloses a vehicular wheel out-of-roundness detection method which solves technical problems that an existing wheel out-of-roundness regular detection mode is low in efficiency, poor in reliability, and long in cycling time, and the out-of-roundness of a wheel in running cannot be detected. According to the vehicular wheel out-of-roundness detection method, the principle that a thin-strip-shaped light source illumination system lights the surface of a wheel in the tread normal direction, and a light section curve from a rim to the tread is formed is used as a basis. A high-speed area array CCD camera which forms a certain included angle with the light section curve shoots the light section curve formed by a light source on the wheel, shooting data are transmitted to a relay module through a wire, a single-chip microcomputer in the relay module collects the shooting data of the camera, then the data are transmitted to a locomotive operation room wirelessly through a data transfer radio, a computer processes images, wheel appearance curves are obtained, and the wheel out-of-roundness is obtained by comparing all the obtained wheel appearance curves and a standard curve.

Description

technical field [0001] The invention relates to a vehicle-mounted method for detecting the out-of-roundness of a wheel. Background technique [0002] After the train runs for a period of time, the wheel tread will produce uneven wear. When the wear reaches a certain value, the out-of-roundness of the wheel will cause additional vibration, impact, and noise to the vehicle, which will affect the stability of the vehicle and pose a threat to the safety of the train. . At present, my country's railways mainly adopt the method of regular detection for the out-of-roundness of the wheel sets, that is, to concentrate a large amount of manpower on the wheel sets in a planned manner within the specified time limit. This detection method has insurmountable shortcomings such as low efficiency, poor reliability, and long turnaround time, and it is impossible to know the quality status of the wheels in operation in time, and it is inevitable that the wheels that are worn to the limit are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/12
CPCB61K9/12
Inventor 肖乾杨逸航昌超
Owner EAST CHINA JIAOTONG UNIVERSITY
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