On-line monitoring system and method for tramcar wheel-set size

Abstract

The invention discloses an on-line monitoring system and method for the tramcar wheel-set size. The system comprises first to seventh laser displacement sensors R1-R7 and eighth to fourteenth laser displacement sensors L1 to L7, wherein the first to seventh laser displacement sensors R1-R7 and the eighth to fourteenth laser displacement sensors L1 to L7 are symmetrically arranged along the centralline of two rails. The on-line monitoring method comprises the steps that wheel tread data is collected, and the wheel data is segmented; with the crossing point of incoming light rays of the first to fifth laser displacement sensors R1-R5 as the original point, a rectangular coordinate system xoy is built, the x axis is parallel to the rail direction, the y axis is perpendicular to the rail direction, a circle is fit, and the circle center and the wheel diameter D are determined; the vehicle running speed v is calculated, and three groups of optimal treads are determined; wheel rim parameters are calculated, and it is achieved that the tramcar wheel diameter, the wheel rim width, the wheel rim thickness and the wheel rim height are monitored. The on-line monitoring system and method forthe tramcar wheel-set size have the advantages of being high in detection precision and fast and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of size monitoring of urban rail tram wheels, in particular to an on-line monitoring system and method for the size of tram wheels. Background technique [0002] The geometric parameters of the wheel set are an important index to measure the condition of the wheel, and it is related to whether the tram can run safely. The polygonal or out-of-roundness of the wheel caused by uneven wear of the wheel tread will impact the track, damage the track surface, and transmit the impact force of the wheel and rail to the carriage, reducing the passenger comfort. The rim wear reduces the rim width and rim thickness gradually, and the rim may be cracked and damaged when the vehicle passes through a turnout or a curve, resulting in a derailment accident. Therefore, timely, effective and accurate grasp of the status of the wheelset is of great significance to the safe operation of the train. In order to grasp the running...

AI Technical Summary

Problems solved by technology

However, due to the uneven wear of the wheel and rail during the operation of the wheel, the wheel has out-of-roundness or polygons, and there is distortion at a certain measurement point on the circle, which affects the accuracy of the entire wheel diameter measurement.

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