Replicate system of automobile engine steel grade

Abstract

The invention discloses a replicate system of an automobile engine steel grade, comprising an eddy current probe, an electric displacement platform, a difference circuit, a signal conditioning circuit, a data collector, a trace imaging module and an actuating signal generating and conditioning circuit, wherein the trace imaging module is used for outputting an actuating command signal F45 to the actuating signal generating and conditioning circuit; the actuating signal generating and conditioning circuit is used for transmitting an actuating signal uin to the eddy current probe according to the actuating command signal F45; the eddy current probe is combined with the electric displacement platform to carry out surface-layer defect scan detection on a piece to be tested in order to obtain defect information uout on the tested piece; after the defect information uout passes through the difference circuit, the signal conditioning circuit and the data collector, numerical defect information u3 is transmitted to the trace imaging module; and the trace imaging module carries out surface-layer trace original information restoration of the received numerical defect information u3 to obtain the original actual image information of the tested piece. The replicate system can nondestructively detect magnetic field variation of the automobile engine steel grade due to altering and falsifying traces, thereby replicating the original automobile engine steel grade.

Description

Technical field [0001] The invention relates to a trace detection device, and more particularly, to a reproducing system suitable for steel grades of automobile engines. Background technique [0002] The presence of discontinuities in physical and chemical properties, defects, cracks, scratches, nicks, indentations and other traces on the surface of the conductive material will change the electromagnetic parameters of the material. Under normal circumstances, this change is very small. How to extract the tiny signal, perform signal recognition, electromagnetic field inversion, imaging and image recognition, has become a series of key technical issues whether the trace reproduction can be realized. At present, methods such as magnetic memory, Bap noise, magnetostriction, and permanent magnetic excitation magnetic flux leakage detection can theoretically be used for trace detection of ferromagnetic materials, but the current signals are not obvious, and only defect equivalent infor...

AI Technical Summary

Problems solved by technology

At present, methods such as magnetic memory, Pasteur noise, magnetostriction, and magnetic flux leakage detection with permanent magnet excitation can theoretically be used for trace detec

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