Wheel diameter difference detection system and method based on axle box vibration

Abstract

The invention provides a wheel diameter difference detection system and method based on axle box vibration, wherein the system comprises an acceleration sensor, a signal acquisition device and a wheeldiameter difference discriminator which are in communication connection, wherein, the acceleration sensor is arranged on an axle box of a railway vehicle and used for acquiring a longitudinal vibration signal and a transverse vibration signal of the axle box and sending the longitudinal vibration signal and the transverse vibration signal to the signal acquisition device; the signal acquisition device is used for extracting vibration characteristics of the axle box according to the longitudinal vibration signal and the transverse vibration signal and sending the vibration characteristics of the axle box to the wheel diameter difference discriminator; and the wheel diameter difference discriminator is used for discriminating the wheel diameter difference category of a wheel pair on the same bogie according to the vibration characteristics of the axle box. The wheel diameter difference detection disclosed by the invention is simple in structure, can conveniently measure the wheel diameter difference, is slightly influenced by the environment, has high measurement accuracy and is suitable for online testing.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a wheel diameter difference detection system and method for rail vehicle axle box vibration. Background technique [0002] With the rapid development of my country's rail transit industry, the operating speed of vehicles continues to increase, which brings convenience to people's travel, but also brings great challenges to the safety and maintenance of rail vehicles. Among them, the wheel set is the core component of the running part of the locomotive, and the state of wheel-rail contact will directly affect the dynamic performance of the vehicle. Therefore, the stable motion state of the wheel set is the basic condition to ensure the safety of train operation, and it is also the regular detection of the diameter of the wheel set. fundamental purpose. [0003] Due to the large diameter of the wheel, it is difficult to directly measure it with ordinary tools, so the wheel di...

AI Technical Summary

Problems solved by technology

However, the number of sensors required is large and the economy is poor

[0005] Moreover, although laser and image measurement methods can achieve low-precision dynamic detection of wheel diameter difference, the speed of the vehicle cannot be higher than 30km / h, and it is difficult to detect the wheel diameter difference in real time during the high-speed operation of the vehicle.

The above measurement techniques have problems such as low precision, high false alarm rate, and high requirements for the measurement environment.

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