Electromagnetic tomography nondestructive inspection device for severe fault of rail and method thereof

Abstract

The invention provides an electromagnetic tomography nondestructive inspection device for severe fault of a rail and a method thereof. The inspection device comprises an L-shaped array sensor, an electromagnetic tomography nondestructive inspection case, a fault detection monitoring and recording computer and a fault detection monitoring liquid crystal panel, wherein the electromagnetic tomography nondestructive inspection case comprises a power driving circuit, an excitation direction control circuit, an excitation current distribution VCCS array, an excitation signal distribution amplification circuit, an orthogonal program control two-channel DDS excitation signal generator, a bus, a system power supply, an FPGA synchronous control circuit, a preposed signal conditioning circuit, a signal digital demodulation FPGA chip, an embedded system, a communication interface and a liquid crystal display module. The device and the method can ensure on-line inspection of rail fault inspection along with train operation, and is convenient for discovering the condition of serious fault of the rail with severe potential danger to rail transportation in time.

Description

technical field [0001] The invention relates to a non-destructive detection device and method of electromagnetic tomography for severe rail damage. Background technique [0002] At present, the technology that can be used for high-speed online rail flaw detection is electromagnetic rail flaw detection, but the electromagnetic rail flaw detection technology is a point measurement mode. Due to the limitation of its principle, its detection range is only 5% to 30% of the rail head. Although the detection range of electromagnetic rail flaw detection is small, in the current situation where high-speed rail detection is urgently needed, this technology still has obvious advantages due to its non-contact and high-speed characteristics, but it has not yet achieved the accuracy of rail damage depth and position. detection. Contents of the invention [0003] The purpose of the present invention is to provide a non-destructive detection device and method of electromagnetic tomograph...

AI Technical Summary

Problems solved by technology

[0002] At present, the technology that can be used for high-speed online rail flaw detection is electromagnetic rail flaw detection, but the electromagnetic rail flaw detection technology is a point measurement mode. Due to the limitation of its principle, its detection range is only 5% to 30% of the rail head

Although the detection range of electromagnetic rail flaw detection is small, in the current situation where high-speed rail detection is urgently needed, this technology still has obvious advantages due to its non-contact and high-speed characteristics, but it has not yet achieved the accuracy of rail damage depth and position. detection

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