Wheel polygon detection method and terminal equipment based on time-frequency domain characteristics of axlebox vibration

Abstract

The invention relates to the technical field of railway safety monitoring, and discloses a wheel polygon detection method based on the time-frequency domain characteristics of axlebox vibration and terminal equipment: obtaining the running speed v1 of the wheel, the main frequency value f1 and the maximum value of the acceleration of the axlebox vibration acceleration under v1 a1; According to f1 and the acceleration vibration main frequency value f2 of the axle box under the action of the ideal round wheel, judge whether the wheel has polygonal damage; if it exists, combine the preset first feature table, v1 and f1 to judge the polygonal damage of the wheel Damage type: according to the polygonal damage type of the wheel, combined with the preset second feature table, v1 and a1, the polygonal wear depth of the wheel is judged. This method analyzes the relationship between the time-frequency domain parameters of the axlebox vibration acceleration and the wheel damage type and damage degree when the high-speed railway train is running in the time-frequency domain, and solves the problem that the existing wheel polygon state detection technology cannot detect high-speed running at the same time. A railway train wheel polygon type and damage level problem.

Description

technical field [0001] The invention relates to the technical field of railway safety monitoring, in particular to a wheel polygon detection method and terminal equipment based on time-frequency domain characteristics of axle box vibration. Background technique [0002] With the leap-forward development of my country's rail transit, the wheels of railway vehicles will become polygonal due to various factors such as rolling contact, traction braking and vehicle vibration after being used for a period of time, that is, the wheel circumference is unevenly worn, etc. The periodic radial deviation formed under the action of various factors. As early as the 1980s, someone described the wheel polygon phenomenon in the Dutch railway in detail. In 1998, the German ICE (Inter City Express, intercity express train) train derailment accident, which shocked the world, was caused by the abrasion of the wheel hub material. Phenomenon, resulting in tire fatigue fracture, resulting in 101 de...

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Problems solved by technology

However, at present, there are few studies on the feedback of wheel polygonal faults and state evaluation from this perspective. Li Yifan et al. published in the journal "Vibration, Testing and Diagnosis" in April 2016, "Train Wheel Out-of-round Fault Diagnosis Based on Hilbert-Huang Transformation" using Axlebox acceleration and signal processing algorithms detect wheel polygon damage, but cannot identify the wear depth of the wheel polygon

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