Rail traffic rail detection system based on acoustic waves

Abstract

The invention belongs to the field of rail traffic rail detection and provides a rail traffic rail detection system based on acoustic waves. The rail traffic rail detection system based on acoustic waves comprises an impact hammer, a sound pick-up, a signal amplifier and a microprocessor; the impact hammer is a metal hammer; by using the impact hammer to strike a rail, the rail produces a sound; the sound pickup receives the sound produced by the rail; after amplifying a sound signal received by the sound pickup, the signal amplifier outputs the sound signal to the microprocessor; the microprocessor calculates the received signal by using a time domain-to-frequency domain algorithm to obtain frequency spectrum data of the received signal; the calculated frequency spectrum data are comparedwith hub frequency spectrum saved in the system; and therefore, rail cracks and screw loosening are detected.

Description

technical field [0001] The invention relates to a rail transit track detection system based on sound waves, which is suitable for detecting cracks and loose screws of various rail transit tracks. Background technique [0002] In 1810, British engineer Stephenson invented the train. In 1876, China had its first railway. After more than 100 years of development, the total mileage of China's railways has reached nearly 130,000 kilometers. With the acceleration of China's urbanization process, cities led by Beijing and Shanghai are vigorously developing urban rail transit, and rail transit has become an important support for the development of the national economy. [0003] As the support and basic system of rail transit vehicles, rail transit tracks are in good condition directly related to the safety of rail transit vehicles. When cracks or loose screws occur on the rail transit tracks, it will affect the rail transit vehicles The stability of the operation will lead to the o...

AI Technical Summary

Problems solved by technology

[0003] As the support and basic system of rail transit vehicles, rail transit tracks are in good condition directly related to the safety of rail transit vehicles. When cracks or loose screws occur on the rail transit tracks, it will affect the rail transit vehicles The stability of the operation will lead to the overturning of rail transit vehicles; there are currently two daily detection methods for rail transit tracks: the percussion sound method and the vibration monitoring method; the percussion sound method means that the patrolman holds a small hammer Walking on the track of rail transit, use a small hammer to tap the track, and the patrolman can determine whether there are cracks or loose screws on the track by listening to the sound from the track. The daily detection of the track by tapping the dialectic method relies heavily on the experience of the patrolman and quality, there is a lot of uncertainty; the vibration detection method is used on the track inspection vehicle to detect the cracks or loose screws of the track by monitoring the vibration frequency and intensity changes of the wheels when the track inspection vehicle passes through the corresponding road section. First, the vibration monitoring The method cannot be used for daily track detection. Second, it cannot detect the cracks and loose screws that appear in the initial stage of the track. Third, it is expensive.

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