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Method for extracting lowest point of spatial wheel rim of wheel track wheel

A lowest point, space technology, applied in measuring devices, instruments, optical devices, etc., to achieve the effect of simple principle, accurate results, and convenient layout

Active Publication Date: 2017-08-29
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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  • Method for extracting lowest point of spatial wheel rim of wheel track wheel
  • Method for extracting lowest point of spatial wheel rim of wheel track wheel
  • Method for extracting lowest point of spatial wheel rim of wheel track wheel

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Embodiment 1

[0116] Such as Figure 2~6 As shown, three laser displacement sensors 2 are installed inside the track 3 in a direction parallel to the track 3. Among them, the angles between the first laser displacement sensor 21, the second laser displacement sensor 22, and the third laser displacement sensor 23 and the plumb line are all 45°, namely 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 Both are 45°, and the second laser displacement sensor 22 is installed in parallel along the longitudinal horizontal line of the track 3 direction, that is, α 2 Is 0°.

[0117] In the following, only the second laser displacement sensor 22 is taken as an example to obtain the lowest point of the rim of the wheel 1 measured by the second laser displacement sensor 22.

[0118] (1) For the second laser displacement sensor 22, th...

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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 specifically relates to a method for extracting the lowest point of the wheel rim in a wheel-rail wheel space. Background technique [0002] In basic transportation construction such as subways and light rails, the wheelset not only bears the full weight of the car body, but also is responsible for transmitting the force between the wheelset and the steel rail. Therefore, the wheelset is an extremely important part of the train running structure and affects the train. An important factor for safe operation. [0003] However, because the wheelset constantly rubs against the surface of the rail during the operation of the train, it is easy to cause the wear of the wheelset tread; in addition, when the wheelset passes through a curve or a switch, the rim part of the wheelset rubs against the inner surface of the rail. It is easy to cause wear of the rim. Based on the aforementi...

Claims

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Application Information

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IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 苏钊颐李海玉
Owner GUANGZHOU METRO GRP CO LTD
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