Railroad micro-magnetism flaw detector and its defectoscopy
A flaw detector, railway technology, applied in the direction of material magnetic variables, etc., can solve the problems of complex operation (requires 6 people to operate at the same time, the detection is not intelligent, and the resolution of axial defects is low, etc. The effect of stable factor and high detection sensitivity
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] FIG. 1 is a schematic block diagram of a railway micromagnetic flaw detector of the present invention, which includes a magnetic sensor device 1 , a signal preprocessor 2 , an A / D converter 3 , and a computer system 4 . The magnetic sensor device 1 scans along the surface of the workpiece to obtain the micro-magnetic signal of defect leakage of the inspected workpiece, and converts it into an electrical signal and sends it to the signal preprocessor 2; the signal preprocessor 2 amplifies, filters, and purifies the signal, and converts the signal The signal is sent to the A / D converter 3; the A / D converter converts the signal into a digital signal and sends it to the computer system 4. The computer system 4 controls the work of the above-mentioned parts, and at the same time performs digital filtering, signal analysis, defect feature extraction, d...
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