Electromagnetic tomography millimeter wave radar online rail flaw detection device and method
A millimeter-wave radar and flaw detection device technology, which is applied in the direction of material analysis, measurement devices, and radio wave measurement systems through electromagnetic means, can solve the problems of inability to obtain stable and accurate surfaces, inability to detect rail surface defects, and insufficient comprehensive and complete detection, etc. problems, to achieve good stability and accuracy, strong adaptability, and comprehensive effects
Active Publication Date: 2021-03-16
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0006] However, the electromagnetic tomography rail flaw detection technology detects the defects on the shallow surface of the rail and cannot detect the defects on the rail surface. Stable and accurate acquisition of surface defects
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[0034] Such as Figure 1 to Figure 2 As shown, the embodiment of the present invention provides an online rail flaw detection device for electromagnetic tomography millimeter-wave radar, including an L-shaped sensor bracket 1, and the L-shaped sensor bracket 1 is provided with an electromagnetic sensor group 2 and a millimeter-wave radar sensor Group 3: the L-shaped sensor bracket 1 includes a horizontal plate 4 corresponding to the tread of the rail and a vertical plate 5 corresponding to the side of the rail;
[0035] The electromagnetic sensor group 2 includes a plurality of electromagnetic sensor devices 6, and the millimeter wave radar sensor group 3 includes a plurality of millimeter wave radar sensor devices 7;
[0036] The electromagnetic sensor device includes a plurality of excitation coils and a plurality of detection coils;
[0037] Both the electromagnetic sensor device and the millimeter-wave radar sensor are connected to a host computer through a data communica...
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The invention discloses an electromagnetic tomography millimeter wave radar online rail flaw detection device and method and belongs to the technical field of rail flaw detection. The device comprisesan L-shaped sensor bracket; the L-shaped sensor bracket is provided with an electromagnetic sensor group and a millimeter wave radar sensor group; the electromagnetic sensor group includes a plurality of electromagnetic sensor devices; the millimeter wave radar sensor group comprises a plurality of millimeter wave radar sensor devices; the electromagnetic sensor device comprises a plurality of excitation coils and a plurality of detection coils; and the electromagnetic sensor devices and the millimeter wave radar sensors are connected with an upper computer through a data communication module. According to the device and method of the invention, millimeter wave radars are adopted, and therefore, good stability and accuracy can be realized; the insufficiencies of electromagnetic tomographyrail flaw detection can be complemented; train-based efficient and rapid detection of flaws on the surfaces and shallow surfaces of the tread and side plane of a rail can be realized; the comprehensiveness, integrity and real-time performance of flaw detection are realized; the stability, accuracy and reliability of the flaw detection of the rail are improved; and a non-radiative flaw detection process can be realized.
Description
technical field [0001] The invention relates to the technical field of rail defect detection, in particular to an electromagnetic tomography millimeter-wave radar online rail flaw detection device and method. Background technique [0002] As an important rail transit infrastructure, rails are subjected to wheel loads for a long time. Fatigue cracks are prone to appear on the rail heads and surfaces, which may cause rail fractures and cause major safety accidents. Therefore, it is necessary to frequently detect defects and cracks on the rails to prevent accidents. [0003] At present, the detection of rails is mostly carried out by ultrasonic method. Ultrasonic detection has a deep detection depth and can detect most of the defects from the head to the bottom of the rail, and the detection accuracy is high, but it requires coupling agent and needs to be in close contact with the rail. It is difficult to increase its speed, making it difficult to realize high-speed online app...
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IPC IPC(8): G01N27/904G01N33/2045G01S13/88
Inventor 刘泽朱盛刘田白鸽
Owner BEIJING JIAOTONG UNIV