Vibration and audio signal-based high-speed train track defect detecting method

Abstract

The invention discloses a vibration and audio signal-based high-speed train track damage detecting method, belongs to the field of signal detection and processing as well as safety monitoring, and solves the problems of low detection speed and single detection method in the conventional train track damage detection. The method comprises the following steps: 1, acquiring vibration signals and audio signals of a train track through sensors arranged at train track detection points; 2, respectively extracting information characteristics included in the vibration signals and the audio signals; 3, respectively obtaining a nonlinear correlation curve of the vibration signals and a nonlinear correlation curve of the audio signals by using a nonlinear correlation analysis method; 4, respectively analyzing the information of the two nonlinear correlation curves obtained in the step 3 so as to respectively obtain minimum values of the two nonlinear correlation curves; and 5, carrying out data fusion on the two minimum values and corresponding information thereof so as to obtain a damage coefficient, and looking up a table to obtain the damage degree according to the coefficient. The method is suitable for detecting the damage on railway train tracks and monitoring the safety operation of trains.

Description

A high-speed train track damage detection method based on vibration and audio signals technical field The invention relates to train safety signal detection and processing and safe running monitoring technology, in particular to a high-speed train track damage detection method based on vibration and audio signals. Background technique With the rapid development of high-speed railways, the traditional ultrasonic damage detection technology cannot meet the flaw detection requirements of high-speed railways due to the limitation of damage detection speed, and it is necessary to explore new high-speed railway flaw detection technologies. During the use of the rail, there will be breakage, cracks and other damage forms that affect and limit the performance of the rail, which is the rail damage. There are many types of rail damage, and the common ones are wear, peeling, rail head nuclear damage, and rail waist screw hole cracks. Rail damage is the main cause of broken rails an...

AI Technical Summary

Problems solved by technology

Aiming at the problem of difficult judgment of the existence and degree of rail damage of high-speed trains, the present invention proposes an adaptive rapid diagnosis method by combining empirical mode decomposition and correlation analysis, that is, based on vibration and audio signal HHT analysis and instantaneous frequency High-speed train track flaw detection method based on feature extraction

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