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A Method of Extracting the Lowest Point of Wheel Flange in Wheel-Rail Space

A low point, space-based technology, applied in the direction of instruments, measuring devices, optical devices, etc., to achieve the effect of convenient layout, elimination of extraction errors, and simple principle

Active Publication Date: 2020-04-21
GUANGZHOU METRO GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the accurate extraction of the lowest point of the wheel space rim is an important link to ensure the accurate detection of the parameters of the wheel set dimensions. However, there is currently no suitable method for accurately extracting the lowest point of the wheel space rim to ensure that the rail vehicle Accuracy of online monitoring

Method used

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  • A Method of Extracting the Lowest Point of Wheel Flange in Wheel-Rail Space

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Embodiment 1

[0112] like Figure 2-6 As shown, three laser displacement sensors 2 are installed inside the track 3 along a direction parallel to the track 3 . Wherein, the included angles between the first laser displacement sensor 21, the second laser displacement sensor 22, and the third laser displacement sensor 23 and the vertical line are all 45°, that is, β 1 , β 2 , β 3 is 45°; the first laser displacement sensor 21 and the third laser displacement sensor 23 are installed at an angle of 45° to the longitudinal horizontal line along the direction of the track 3, namely α 1 、α 3 are all 45°, and the second laser displacement sensor 22 is installed parallel to the longitudinal horizontal line in the direction of the track 3, that is, α 2 is 0°.

[0113] The following only takes the second laser displacement sensor 22 as an example to obtain the lowest point of the rim of the wheel 1 measured by the second laser displacement sensor 22 .

[0114] (1) For the second laser displaceme...

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Abstract

The invention discloses a method for extracting the lowest point of the spatial wheel rim of a wheel track wheel. The method comprises the following steps of S1, laser displacement sensor arrangement; S2, laser displacement sensor data acquisition and three-dimensional coordinate transformation; S3, determination of a laser displacement sensor emitted laser plane; S4, spatial wheel rim data point projection and end surface projection line determination; S5, the fitting of the spatial wheel rim projection curve and the initial extraction of the lowest point of the spatial wheel rim; and S6, extraction of the final spatial wheel rim. The method for extracting the lowest point of the spatial wheel rim of the wheel track wheel of the invention has the advantages of being more accurate and practical, so as to provide a reliable guarantee for the non-contact online accurate measurement of the wheel set profile dimension parameter. The method is very suitable for rail transit monitoring engineering technology.

Description

technical field [0001] The invention belongs to the technical field of traffic monitoring engineering, and in particular relates to a method for extracting the lowest point of a wheel rim in a wheel-rail wheel space. Background technique [0002] In the construction of basic transportation such as subways and light rails, the wheelset not only bears the entire weight of the car body, but also is responsible for transmitting the force between the wheelset and the rail. important factor for safe operation. [0003] However, since the wheelset constantly rubs against the surface of the rail during the operation of the train, it is easy to cause wear on the tread surface of the wheel set; It is easy to cause wear of the rim. Based on the aforementioned wear of the tread surface of the wheel set and the wear of the wheel rim, the external dimensions of the wheel set are likely to change, thereby reducing the safety of the train operation. [0004] Therefore, whether it is poss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 苏钊颐李海玉
Owner GUANGZHOU METRO GRP CO LTD
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