Railway rail flaw detection system
A technology for rails and railways, applied to railway car body components, railway auxiliary equipment, railway vehicle shape measuring devices, etc., can solve the problems of easy misjudgment, low accuracy of damage discrimination, and inability to realize comprehensive monitoring of railway rail flaw detection systems, etc. problems, to avoid the introduction of interference and improve accuracy
Pending Publication Date: 2018-02-09
CHINA RAILWAYS CORPORATION +3
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Problems solved by technology
[0005] The accuracy of damage discrimination in the existing technology is not high, it is easy to misjudgment, and it cannot realize the comprehensive monitoring of the railway rail flaw detection system
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[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0026] The inventors found that the existing railway rail flaw detection system detects railway rail flaws based on B-shaped graphics, uses analog signal processing technology, hardware parameter calibration is complicated, and new interference is easily introduced. In order to avoid interference and improve the accuracy of flaw detection, it can be considered in the embodiment of the present invention to perform analog-to-digital conversion on the ultrasonic radio frequency signal detected in real time, avoid introducing interference through digital signal processing ...
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The invention discloses a railway rail flaw detection system, comprising a wheel probe, a signal conditioning circuit, an analog-to-digital (AD) converter and a programmable logic gate array, whereinthe wheel probe is used for carrying out railway rail flaw detection so as to generate an ultrasonic radio frequency signal; the signal conditioning circuit is connected with the wheel probe and is used for carrying out signal conditioning on the ultrasonic radio frequency signal; the AD converter is connected with the signal conditioning circuit and is used for carrying out analog-to-digital conversion on the ultrasonic radio frequency signal subjected to the signal conditioning; the programmable logic gate array is connected with the AD converter and is used for carrying out digital signal processing on the ultrasonic radio frequency signal subjected to the analog-to-digital conversion so as to enable the ultrasonic radio frequency signal to be converted into a type A waveform; signal feature extraction is carried out on the type A waveform, and the extracted features are used for generating type B graphics and monitoring the state of the railway rail flaw detection system in real time. The railway rail flaw detection system can improve the accuracy of railway rail flaw detection, the comprehensive monitoring of the railway rail flaw detection system is realized, and the railwayrail flaw detection system also has the functions of type A waveform storage and playback.
Description
technical field [0001] The invention relates to the technical field of railways, in particular to a railway rail flaw detection system. Background technique [0002] The maximum detection speed of large-scale railway rail flaw detection vehicle is 80km / h. It has the characteristics of fast detection speed and high efficiency, and plays an important role in ensuring railway safety. The railway rail flaw detection system is installed on the railway rail flaw detection vehicle, which uses the wheel probe in contact with the railway rail tread to complete the inspection of the internal damage of the railway rail during the driving process of the flaw detection vehicle. During the detection operation, the railway rail flaw detection system can display two types of detection data, A-type waveform and B-type graph, in real time. [0003] Type A waveform is the data generated in real time during the operation of the railway rail flaw detection system. According to some characteris...
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IPC IPC(8): G01N29/04G01N29/44B61K9/10
CPCG01N29/04G01N29/44B61K9/10G01N2291/0289G01N2291/0234G01N2291/2623
Inventor 李培张玉华石永生杨冯军黄筱妍
Owner CHINA RAILWAYS CORPORATION