Track breaking monitoring system of high-speed railway

Abstract

The invention provides a track breaking monitoring system of a high-speed railway. The system comprises a MCU for generating a testing signal according to received instruction information and sending to an ultrasonic sending probe, the ultrasonic sending probe for receiving the testing signal and sending an ultrasonic signal to a high-speed railway track according to the testing signal, an ultrasonic receiving probe for receiving the ultrasonic signal from the high-speed railway track and sending the ultrasonic signal to an FPGA processing circuit, and the FPGA processing circuit for performing digital filter and FFT analysis for the ultrasonic signal as well as carrying out frequency spectrum comparison and signal correlation comparing and analyzing for the FFT analysis result so as to determine the track breaking condition of the high-speed railway. According to the track breaking monitoring system of the high-speed railway, the measures of shielding and isolating loops are carried out to increase the signal conversion quality, and the influence of an electromagnetic environment on the detection result is reduced; in addition, the wavelet analysis algorithm is carried out for the FPGA processing circuit, and therefore, the signal receiving sensitivity is high, and the measurement distance is effectively increased.

Description

technical field [0001] The invention relates to the field of railway broken track monitoring, in particular to a high-speed railway broken track monitoring system. Background technique [0002] High-speed railway (referred to as high-speed railway) refers to the transformation of the original line (linearization, standardized gauge), so that the maximum operating speed can reach no less than 200 kilometers per hour, or specially build a new "high-speed new line", so that the operating speed can reach 200 kilometers per hour. A rail system with at least 250 kilometers per hour. For high-speed railways, in addition to reaching a certain speed standard in train operation, the vehicles, rails, and operations all need to be upgraded. [0003] The emergence of high-speed railways has undoubtedly brought great convenience to people's lives, but on high-speed railways, trains have been running at high speeds, so it is easier to cause rail breakage. Therefore, the relevant technolo...

AI Technical Summary

Problems solved by technology

[0003] The emergence of high-speed railways has undoubtedly brought great convenience to people's lives, but on high-speed railways, trains have been running at high speeds, so it is easier to cause rail breakage. Therefore, the relevant technology introduces the rail flaw detection measurement technology, which mainly uses human flaw detection trolleys and large rail flaw detection vehicles, and detects high-speed railways through inspection methods. The method of detection cannot be monitored in real time, and the means of flaw detection of this technology mainly include non-contact methods such as magnetic flux leakage flaw detection and eddy current flaw detection, which makes the detection depth shallow and the detection accuracy is poor; there is another way to use track circuits for rail flaw detection measurement. The way is to use electrical coupling to receive tiny electrical signals, which are easily affected by the surrounding electromagnetic environment, humidity, rain, snow, etc., so the measurement results are also inaccurate

[0004] The inventor found in the research that the methods of rail flaw detection and measurement in related technologies are not ideal, and no effective solution has been proposed for this problem

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