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Wheel tread abrasion detection method based on laser displacement sensor

A technology of laser displacement and wheel tread, applied in the direction of optical testing flaws/defects, instruments, measuring devices, etc., can solve the problems of complex measurement principle, poor system stability, low measurement accuracy, etc., to achieve simple measurement principle, system stability, measurement high precision effect

Active Publication Date: 2018-01-19
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the measurement principle of the above method is complicated, the number of laser displacement sensors required is large, the system stability is poor, and the measurement accuracy is low.

Method used

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  • Wheel tread abrasion detection method based on laser displacement sensor
  • Wheel tread abrasion detection method based on laser displacement sensor
  • Wheel tread abrasion detection method based on laser displacement sensor

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Experimental program
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Embodiment 1

[0062] In order to verify the effectiveness and accuracy of the wheel tread wear detection method proposed in this study, the project team conducted field experiments in Chisha Depot of Guangzhou Metro, including standard wheel set experiments and passing experiments. The tread wear value is the difference between the standard rim height and the actual wheel rim height, so the detection accuracy of the tread wear is equal to the detection accuracy of the rim height. For the convenience of expression, the experimental results are analyzed from the angle of the rim height.

[0063] In the standard wheel set experiment, the rim height of the selected standard wheel set is 28 mm. The standard wheel set is placed on the track, and the wheel set is manually pushed through the detection system at a slow speed. A total of 6 system measurements are made along the same direction. The results are as follows: Table 1 shows. It can be seen that the measurement error of the system is ±0.2mm...

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Abstract

The invention discloses a wheel tread abrasion detection method based on a laser displacement sensor. The method includes the following steps: arranging a 2D laser displacement sensor that is positioned lower than a steel rail plane position outside a track; sectioning data corresponding to wheels by analyzing distribution rules of the number of output effective value data points, and filtering wheel brake disc and vehicle bottom device data that is inconsistent with the wheel data; on the basis of mounting position parameter values of the laser displacement sensor, converting a coordinate system xoy of the sensor into a tread reference coordinate system uov through coordinate rotation; combining contour data of standard wheels and data measured by the sensor, and obtaining complete contour data of wheels; and selecting data about the smallest wheel rim as optimal tread data, and calculating wheel tread abrasion, wherein a difference between a standard wheel rim height and an actual wheel rim height is a tread abrasion value. The method is simple in measuring principle, provides a stable system, and can meet actual demands of tread abrasion measurement.

Description

technical field [0001] The invention belongs to the technical field of railway wheel detection, in particular to a method for detecting wheel tread wear based on a laser displacement sensor. Background technique [0002] Wheel tread wear, as one of the important parameters of wheel set size, ensures the safety and comfort of train operation. With the increase of the operating mileage of the train, the wear of the wheel tread gradually increases. At the same time, the wear of different wheels is different, and the wheel diameter value changes greatly, which reduces the safety and comfort of the train operation. Therefore, the wear detection of the wheel tread is carried out regularly. It is very important to ensure the safe operation of trains through detection, obtaining accurate wear values, and judging whether they exceed the limit. [0003] At present, the detection methods of wheel tread wear are mainly divided into two types: contact measurement and non-contact measure...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01N21/88
Inventor 白良留张晶韩煜霖陈壮裴卫卫张永邢宗义
Owner NANJING UNIV OF SCI & TECH
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