Laser acoustomagnetic steel rail surface defect rapid flaw detection system and method

A magnetic flaw detector, laser ultrasonic technology, applied in the direction of optical testing flaws/defects, material analysis through optical means, instruments, etc., can solve the problems of inability to realize fast flaw detection of rail tread defects, slow flaw detection speed, low detection sensitivity, etc.

Pending Publication Date: 2017-08-01
LASER RES INST OF SHANDONG ACAD OF SCI
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Problems solved by technology

This method belongs to the contact flaw detection method, which has low detection sensitivity for defects on the upper surface and near surface of the rail tread, and is limited by the need to use coupling agents and high requirements on the surface state of the rail tread during the flaw detection process. Flaw dete...

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  • Laser acoustomagnetic steel rail surface defect rapid flaw detection system and method
  • Laser acoustomagnetic steel rail surface defect rapid flaw detection system and method
  • Laser acoustomagnetic steel rail surface defect rapid flaw detection system and method

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no. 1 example

[0033] The first embodiment of the present invention provides a laser acousto-magnetic rail surface defect rapid flaw detection system 100, please refer to figure 1 , the laser acoustomagnetic rail surface defect rapid flaw detection system 100 includes a control device 110 and a plurality of laser acoustomagnetic flaw detectors 120 . A plurality of laser acoustomagnetic flaw detectors 120 are electrically connected to the control device 110, and the plurality of laser acoustomagnetic flaw detectors 120 are arranged according to a preset distance. See figure 2 , the laser acoustomagnetic flaw detector 120 includes a laser ultrasonic excitation device 130 , an ultrasonic diffraction shear wave receiving device 140 and an adjustment mechanism 150 . The laser ultrasonic excitation device 130 and the ultrasonic diffraction shear wave receiving device 140 are respectively electrically connected to the control device 110 .

[0034] In the first embodiment of the present invention...

no. 2 example

[0070] The second embodiment of the present invention provides a rapid detection method for surface defects of a laser acoustomagnetic rail, which is applied to the rapid detection system for surface defects of a laser acoustomagnetic rail provided in the first embodiment of the present invention. Such as Figure 9 As shown, the laser acousto-magnetic rail surface defect rapid flaw detection method includes:

[0071] Step S10: Use the laser acousto-magnetic rail surface defect rapid flaw detection system to conduct pre-flaw detection on the real object, and obtain the pre-flaw detection result.

[0072] Specifically, step S10 includes:

[0073] The control device controls the laser ultrasonic excitation device to emit a focused pulsed laser beam to the surface of the object; the ultrasonic diffraction shear wave receiving device receives the ultrasonic diffraction shear wave signal and transmits it to the control device; the control device judges the ultrasonic Whether the d...

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Abstract

The embodiment of the invention provides a laser acoustomagnetic steel rail surface defect rapid flaw detection system and method and relates to the technical field of flaw detection. The laser acoustomagnetic steel rail surface defect rapid flaw detection system comprises a control device and a plurality of laser acoustomagnetic flaw detectors electrically connected with the control device and arranged according to preset intervals. Each laser acoustomagnetic flaw detector comprises a laser ultrasonic excitation device, an ultrasonic diffraction transverse wave receiving device and an adjusting mechanism. The laser ultrasonic excitation devices and the ultrasonic diffraction transverse wave receiving devices are electrically connected with the control device. The ultrasonic diffraction transverse wave receiving devices are used for emitting focused pulse laser beams to the surface of an object to be detected. The ultrasonic diffraction transverse wave receiving devices are used for receiving ultrasonic diffraction transverse wave signals produced on the surface the object to be detected. The control device judges whether flaw signals exist or not according to the amplitude values of the ultrasonic diffraction transverse wave signals and locates the positions corresponding to the existing flaw signals, so that flaw positions are obtained. Rapid flaw detection can be achieved.

Description

technical field [0001] The invention relates to the technical field of flaw detection, in particular to a laser acousto-magnetic rail surface defect rapid flaw detection system and method. Background technique [0002] Railway safety is an eternal theme in railway transportation and a necessary condition for ensuring economic and social development. Nowadays, with the continuous improvement of railway running speed and load capacity, a large number of surface defects are easy to form on the rail tread, and the surface defects will gradually expand to the inside of the rail. In severe cases, it will cause the rail to break and endanger the driving safety. Non-destructive testing of defective rail treads is of paramount importance. [0003] At present, the traditional piezoelectric ultrasonic method is mainly used for flaw detection of rail tread defects at home and abroad. This method belongs to the contact flaw detection method, which has low detection sensitivity for defe...

Claims

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Application Information

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IPC IPC(8): B61K9/10G01N21/17G01N21/95
CPCG01N21/1702G01N21/9515B61K9/10G01N2021/1706G01N2021/9518
Inventor 孙继华赵扬宋江峰马健郭锐南钢洋刘帅王启武
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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