Device and method for out-of-roundness detection of urban rail vehicle wheels based on laser sensor

Abstract

The invention discloses a laser-sensor-based device and method for detecting the out-of-roundness of wheels of urban rail vehicles. The device comprises a central processing unit and a plurality of laser sensors, wherein the laser sensors are all connected with the central processing unit; steel rails in a detection zone deviate outwards, and guard rails are arranged on the inner sides of the steel rails in the detection zone; the laser sensors are arranged between the zone vacated in the deviation process of the steel rails and the guard rails, probes of the laser sensors are arranged in the direction of the steel rails and are all located below the wheels, and all the laser sensors and the circumferences of the wheels undergoing out-of-roundness measurement are in the same plane. According to the method, the multiple laser sensors are used and installed below the wheels according to a certain geometrical relationship, the sensors simultaneously detect the wheels to obtain detection points, diameters are obtained through the least square fit, then the diameters in the whole circumference of each wheel are segmented to obtain the average, and the minimum value is subtracted from the maximum value to obtain the out-of-roundness of each wheel. The laser-sensor-based device and method for detecting out-of-roundness of wheels of urban rail vehicles have the advantages of being high in speed and accuracy and large in diameter measurement range in the aspect of online non-contact measurement.

Description

technical field [0001] The invention relates to the field of railway wheel detection, in particular to a device and method for detecting out-of-roundness of urban rail vehicle wheels based on a laser sensor. Background technique [0002] During the operation of urban rail vehicles, there will be different degrees of wear and tear, which will affect the safe operation of the wheels, and the polygonal wheel tread caused by uneven wear is particularly important, which poses a serious threat to the safety of the train, making the locomotive The dynamic effect of the vehicle on the line and itself is greatly increased, and at the same time it will bring additional vibration and impact, reduce the critical speed of the rolling stock, and make the stability and comfort of the train worse. Therefore, the measurement of the out-of-roundness of the wheel tread is of great significance to the safe operation of the train. [0003] The detection methods of wheel roundness are mainly div...

AI Technical Summary

Problems solved by technology

However, this method uses contact measurement, which is not suitable for trains passing at high speed, and has problems such as slow measurement response speed, low mechanical structure life, and difficulty in engineering implementation.

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