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A method and system for determining the position of a force measuring wheel pair strain gauge

A force measuring wheel set and a technology for determining a method, which are applied to measuring devices, force/torque/power measuring instruments, force/torque/power measuring instrument calibration/testing, etc., can solve the problem of insufficient operational reliability and poor accuracy of force measurement advanced questions

Active Publication Date: 2020-12-25
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a method and system for determining the position of the strain gauge of the force-measuring wheel set to overcome the problems of low force measurement accuracy and insufficient operational reliability of the existing force-measuring wheel set

Method used

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  • A method and system for determining the position of a force measuring wheel pair strain gauge
  • A method and system for determining the position of a force measuring wheel pair strain gauge
  • A method and system for determining the position of a force measuring wheel pair strain gauge

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Embodiment 1

[0077] figure 1 It is a flow chart of a method for determining the position of a force measuring wheel pair of strain gauges in Embodiment 1 of the present invention. see figure 1 , the method for determining the position of the force measuring wheel pair of strain gauges in this embodiment includes:

[0078] Step S1: Determine the strain gradient change of the wheel web according to the vertical force and lateral force applied on the wheel tread.

[0079] Step S2: Determine the radial strain gradient at different radii of the wheel web plate according to the vertical force and lateral force applied along the rotation direction of the wheel tread circumference.

[0080] The step S2 specifically includes:

[0081] According to the radial strain gradient and even-order harmonic constraint conditions, the first included angle is determined by using the mean square error method; the first included angle is the included angle between the first strain gauge and the second strain ...

Embodiment 2

[0109] Aiming at the problems of low test accuracy, insufficient operation reliability, oversimplified calibration method, no consideration of the influence of wheel wear, and difficulty in long-term follow-up testing of existing force-measuring wheel sets, an optimal strain measurement method for force-measuring wheelsets was proposed. Chip layout optimization and least square error control calibration, by strengthening the optimal layout control of the measurement connection system, by using neural network technology to analyze and diagnose the test system, in order to improve the test accuracy of the force measuring wheel set, with high A dynamometric wheel set method for operational reliability and self-diagnostic test system failure function.

[0110] The train of thought of the method for determining the position of the force measuring wheel pair strain gauges provided in this embodiment is as follows:

[0111] In order to determine the optimal arrangement of the strain ...

Embodiment 3

[0200] Such as Figure 5 As shown, the force measuring wheel pair strain gauge position determination system provided in this embodiment includes:

[0201] The gradient change determination module 501 is configured to determine the strain gradient change of the wheel web according to the vertical force and lateral force applied on the wheel tread.

[0202] The radial strain value calculation module 502 is used to determine the radial strain gradient at different radii of the wheel web according to the vertical force and lateral force applied along the wheel tread circumferential rotation direction.

[0203] The harmonic component calculation module 503 is configured to perform fast Fourier transform on the response corresponding to the radial strain gradient, and determine the harmonic component of the response corresponding to the radial strain gradient at different radii.

[0204] The strain gauge position determination module 504 is configured to determine the position of ...

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Abstract

The invention discloses a method and system for determining the position of a strain gauge of a dynamometric wheel set. The method comprises the following steps: determining the strain gradient changeof a wheel spoke plate; according to a periodic change of a wheel spoke plate strain gradient response in a circumferential rotation direction of the wheel, determining harmonic components of different strain responses through FFT; according to the strain gradient and constraint conditions corresponding to different subharmonics, determining the position of a strain gauges on the same circumference of the wheel spoke plate by adopting a mean square error method; calculating a sensitivity transfer coefficient matrix and a measurement error value by adopting a least square pseudo-inverse methodaccording to the initial position of the strain gauge on the dynamometric wheel set in combination with a wheel set calibration test bed; and adjusting the initial position of the strain gauge on thedynamometric wheel set according to the strain gradient change and the control measurement error value to obtain an adjusted position, and determining the adjusted position as the position of the strain gauge on the dynamometric wheel set. According to the invention, the force measurement precision and the higher reliability of the force measurement wheel set can be improved.

Description

technical field [0001] The invention relates to the field of wheel-rail force testing, in particular to a method and system for determining the position of strain gauges of a force-measuring wheel pair. Background technique [0002] The measurement of railway wheel / rail interaction force is a key means to evaluate and analyze vehicle / track interaction, rail vehicle safety, vehicle / track structure fatigue strength, etc. Accurate and reliable measurements of wheel-rail forces on railway vehicles have long been desired. [0003] The wheel-rail force is usually tested by two methods: ground and vehicle. The measurement system device installed on the ground line can only be tested at a fixed position due to equipment conditions, and cannot be continuously tested along the line. The vehicle-mounted dynamometer wheel set test technology can continuously test the wheel-rail force, which overcomes the shortcomings of the ground measurement system. [0004] However, the traditional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00G01L25/00
CPCG01L5/00G01L25/00
Inventor 金新灿孙守光李强刘志明蒋震方尹宇杰张利明
Owner BEIJING JIAOTONG UNIV
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