Continuous measuring method for instrumented wheelset

A force measuring wheel set and measuring method technology, applied in the direction of measuring force, measuring devices, instruments, etc., can solve the problems of large errors in measurement results and no consideration of changes in the position of contact points, etc.

Inactive Publication Date: 2012-10-10
SOUTHWEST JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

The existing force-measuring wheel sets in China basically do not consider the position change of the contact point. Calibration experiments and data processing all assume that the contact point is on the rolling circle, and the error of the measurement result is relatively large.

Method used

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  • Continuous measuring method for instrumented wheelset
  • Continuous measuring method for instrumented wheelset
  • Continuous measuring method for instrumented wheelset

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Embodiment Construction

[0029] In the following, the technical solution and the decoupling algorithm in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only part of the specific embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] The measuring device in the embodiment of the present invention includes a first group of measuring electric bridges 501, which are connected to the shaft of the force-measuring wheel set, and are used to measure the wheel-set rotation angle of the force-measuring wheel set;

[0031] The second group of measuring electric bridges is connected with the spoke plate of the force measuring wheel set, and is used for mea...

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Abstract

The invention relates to a continuous measuring method for an instrumented wheelset, and provides a novel continuous measuring method for an instrumented wheelset and a decoupling algorithm. The continuous measuring method aims to solve problems of low measurement precision, miscellaneous bridge distribution scheme, complicated decoupling algorithm and the like of an existing measuring method of an instrumented wheelset. The method includes measuring the rotation angle of the instrumented wheelset by a first group of bridges; measuring wheel-rail transverse force, perpendicular force and positions of action spots by three other groups of measuring bridges; and carrying out decoupling computation by a kalman filtering method. The first group of bridges consists of two measuring bridges, the first measuring bridge is symmetric relative to a shaft, is arranged on the shaft and outputs sine waves, the other measuring bridge is symmetric relative to a shaft, is arranged on the shaft and outputs cosine waves, and the other three groups of measuring bridges are arranged on the inner side of a wheel plate and only output odd harmonic waves. The continuous measuring method has the advantages of simplicity in bridge distribution scheme and the decoupling algorithm, low measurement cost and more accuracy.

Description

technical field [0001] The invention relates to the field of wheel-rail force measurement of rail vehicles, in particular to a continuous measurement method and a decoupling algorithm for force-measuring wheel-to-wheel-rail force and contact point position. Background technique [0002] The measurement of wheel-rail force is of great significance to dynamics, derailment mechanism, wheel-rail contact theory research and train safety detection. Railway transportation continues to develop in the direction of high speed, heavy load, large volume and high precision, which puts forward higher requirements for the measurement accuracy of wheel-rail force. The dynamometric wheel set method is currently the most direct and accurate wheel-rail force measurement technology. It uses the wheel as the wheel-rail force detection sensor, and realizes the continuous detection of the wheel-rail contact force by measuring the strain at the finite point of the wheel web. During the operation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22
Inventor 陈建政邓霏
Owner SOUTHWEST JIAOTONG UNIV
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