Real-time detection method for high-speed rail injury based on vibration and audio composite signals

Abstract

The invention discloses a real-time detection method for a high-speed rail injury based on vibration and audio composite signals. The method comprises the following steps: 1, installing a vibrating and acoustic sensor on a high-speed rail, forming a wireless sensor network by combining with a wireless node processor, and measuring a vibration signal and an audio signal of the rail in real time; 2, building a rail vibration model and an acoustic model by adopting a finite element method according to the actual structure of the rail, so as to obtain classic vibration and audio signals of the rail injury; 3, carrying out pretreatment on the signal by adopting Hilbert-Huang transformation; 4, building three-dimensional tensors of vibration, audio and injury varieties by fusing vibration and acoustic signals; 5, decomposing and extracting the injury variety feature coefficient by using a nonnegative tensor; 6, building an injury identification rule by using a related vector machine, and classifying real-time measurement signals, so as to determine the injury variety. By adopting the real-time detection method, real-time detection for the high-speed rail injury is achieved, and safe operation of the high-speed rail is ensured.

Description

technical field [0001] The invention relates to a detection method for rail damage of a high-speed railway, in particular to a real-time detection method for rail damage of a high-speed railway based on vibration and audio frequency composite signals. Background technique [0002] With the vigorous construction of my country's railway transportation, especially the rapid development of high-speed railways, the safety of railway transportation is becoming more and more important. Due to the limitation of damage detection speed, the traditional ultrasonic damage detection technology and mode cannot meet the detection requirements of high-speed railways, and the research on new high-speed railway flaw detection technologies is imminent. [0003] During the use of the rail, there will be breakage, cracks and other damage forms, that is, rail damage. Rail damage is the main cause of broken rails and an important hidden danger affecting traffic safety. Train derailment accidents ...

AI Technical Summary

Problems solved by technology

In addition, the high-speed railway has high traffic density and high speed. The existing railway rail flaw detection mode, which is mainly based on large-scale flaw detection vehicles and supplemented by small flaw detectors, will occupy the high-speed railway line when testing the rails, which seriously affects the efficiency of train operation.

At the same time, small rail flaw detectors can only perform limited detection in a local area

Traditional flaw detection methods are difficult to meet the needs of high-speed railways, so it is necessary to develop fast, accurate and real-time flaw detection technology for high-speed railways as soon as possible

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