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Wheel diameter measurement method for urban rail train

A detection method, the technology of urban rail trains, applied in the direction of rim measurement/measurement, measuring devices, instruments, etc., can solve the problems of low precision and achieve the effects of high precision, fast calculation speed and simple operation

Inactive Publication Date: 2017-09-26
GUANGZHOU METRO GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods have low precision and are easily disturbed by external light and the surface state of the wheel set (dirt, etc.)

Method used

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  • Wheel diameter measurement method for urban rail train
  • Wheel diameter measurement method for urban rail train
  • Wheel diameter measurement method for urban rail train

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Three sets of laser displacement sensors are installed on the inner side of the track along the direction parallel to the track, the angle between the sensors S1, S2, S3 and the plumb line is 45°, then β 1 , β 2 , β 3 is 45°, and the sensors S1 and S3 are installed at an angle of 45° to the longitudinal horizontal line along the track direction, then α 1 、α 3 is 45°, the sensor S2 is installed parallel to the longitudinal horizontal line of the track direction, then α 2 is 0°, and the vertical installation distances between sensors S1, S2, S3 and the track are all 300mm, then l 1 , l 2 , l 3 is 300mm. The passing wheels are detected, and the coordinates of the collected data points are transformed into three-dimensional coordinates.

[0126] For the laser displacement sensor S1, the coordinate system O 1 -X 1 Y 1 Z 1 The translation matrix between the origin and the earth coordinate system O-XYZ [a 1 b 1 c 1 ] T =[328.42 533.8519 -474.1728] T , at O 1...

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Abstract

The invention discloses a wheel diameter measurement method for an urban rail train. The method comprises the following steps: at least three sensors Sn are arranged sequentially on the inner side of a track, wherein n is an identifier of the sensors, and n is larger than or equal to 3; coordinates of a to-be- measured wheel at a measurement point are obtained through the sensors; the coordinates are transformed to a geodetic coordinate system with the circle center of a standard wheel as the origin; effective data points are extracted under the geodetic coordinate system after transformation, part of data points of a rim are obtained, and a rim contour is established; the lowest rim point is extracted from the rim contour, and the wheel diameter is solved on the basis of the lowest rim point. The wheel diameter measurement method has the characteristics of simple measurement principle, high calculation speed and accurate measurement result.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of rail vehicles, and in particular relates to a detection method for wheel diameters of urban rail trains. Background technique [0002] In the urban rail transit system, the wheel set is an extremely important part of the train running structure. It carries all the dynamic and static loads of the train and is an important factor affecting the safe operation of the train. During the long-term operation of the train, the wear of the wheels will become more and more serious, and the diameter of the wheels will continue to decrease. When there is a large difference in the diameters of the two coaxial wheels, the train will tend to the side with the smaller diameter of the wheels, and then The wear of the wheel is aggravated, resulting in a decrease in the safety of train operation. Therefore, the diameter of the wheel has a great influence on the safe operation of the train, and it is ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/08G01B11/00B61K9/12
CPCG01B11/08B61K9/12G01B11/002
Inventor 苏钊颐
Owner GUANGZHOU METRO GRP CO LTD