Steel rail corrugation acoustic diagnosis system for rail transit

Abstract

The invention relates to a steel rail corrugation acoustic diagnosis system for rail transit, and belongs to the technical field of rail transit vibration noise. The system comprises an upper computer, a lower computer, a vehicle ground detection system and a ground detection vehicle system, wherein the upper computer is in wireless or wired connection with the lower computer; the lower computer is connected with the vehicle ground detection system and the ground detection vehicle system; the vehicle ground detection system comprises a microphone, an acceleration sensor, an inertial navigation element and a GPS receiving board card which are arranged at a bogie under the vehicle; the ground detection vehicle system comprises a microphone, a laser radar and a camera which are arranged beside a rail. The rail corrugation state is diagnosed, the rail corrugation characteristics can be accurately recognized in the time-frequency spectrum characteristics, the characteristic frequency recognition is accurate, the detection efficiency is high, obvious early warning and rapid detection advantages are achieved, meanwhile, the cost generated by static monitoring of rail corrugation can be greatly reduced, important economic value and practical significance are achieved, and technical support can be provided for determining a reasonable polishing period and researching noise control.

Description

technical field [0001] The invention relates to a rail corrugation acoustic diagnosis system for rail traffic, belonging to the technical field of rail traffic vibration and noise. Background technique [0002] With the rapid development of my country's rail transit, the issue of rail corrugation has also received increasing attention. Rail corrugation is a periodic wavy uneven curve that appears on the surface of the rail, which will accelerate the deterioration of the working state of each component of the train-rail system and aggravate the damage of the rail surface. At the same time, rail corrugation causes vibration and noise between the wheel and rail of the train during operation, which affects the comfort of passengers and the quality of life of residents along the rail transit. Therefore, it is very important to discover the corrugation problem of rail transit rails in time. [0003] Regarding the detection of rail corrugation, the caliper method was used to meas...

AI Technical Summary

Problems solved by technology

The measurement based on the string measurement method is not limited by low speed, but the transfer function of the string measurement method is constantly changing from 0 to 2, and is not always 1; therefore, the measurement results cannot accurately reflect the real situation of the short-wave irregularity of the track

The axlebox acceleration integration method uses the method of measuring the axlebox acceleration value and integrating twice to calculate the short-wave irregularity. This method has a simple structure and is easy to implement. However, the dynamic range of the axlebox acceleration is large, and it is difficult for the sensor to meet the requirements of resolution and Accuracy requirements, therefore, the detection accuracy is not high enough

Images