A non-contact urban rail vehicle wheel set size online detection method

Abstract

The invention discloses a non-contact type urban rail vehicle wheel set size on-line detection method. The method includes the following steps: successively arranging a first laser displacement sensorand a second laser displacement sensor on the inner side of a track in a train forwarding direction and successively arranging a fourth laser displacement sensor and a third laser displacement sensoron the outer side of the track, the first and fourth laser displacement sensors being symmetrical about the track and the second laser displacement sensor and the third laser displacement sensor being symmetrical about the track; carrying out coordinate rotation and transverse plane and feature point extraction on two-dimensional data points collected by the laser displacement sensors, and obtaining distances between the laser displacement sensors and a tread side of a vehicle wheel when the circle center of the vehicle wheel is in the central lines of the first and second laser displacementsensors and is in the central lines of the third and the fourth laser displacement sensors; solving two sets of diameters according to geometrical relations, and obtaining an average value of the diameter of the vehicle wheel; and obtaining two sets of vehicle wheel tread side contours through data fusion, and obtaining an average value of parameters of the rim of the vehicle wheel. The method hasthe advantages that the structure is simple, the precision is high and the stability is high.

Description

technical field [0001] The invention belongs to the technical field of urban rail vehicle wheel detection, in particular to a non-contact type online detection method for urban rail vehicle wheel set size. Background technique [0002] With the rapid development of urban rail vehicles in my country, the running speed of urban rail transit is getting faster and faster, so the safety problems of its online operation are becoming increasingly prominent. During the operation of urban rail vehicles, the wheel sets play the role of guiding, bearing and transmitting loads. During this process, the wheelset rubs against the track, which causes the wear of the wheel tread, making the wheel diameter, rim thickness, Changes in wheel set size parameters such as rim height have had a significant impact on passenger ride comfort and safety. Therefore, in order to ensure the safety of urban rail vehicles, the on-line detection technology for vehicle wheel diameters and wheel rims and othe...

AI Technical Summary

Problems solved by technology

The United States, Japan, Switzerland and other countries have mature technologies in the development of wheel set size automatic detection systems, but their special requirements for tracks and high costs make them unable to be widely used in domestic urban rail transit

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