A new online eddy current inspection method for copper alloy contact wire production process is proposed to address the shortcomings of traditional eddy current inspection methods.The excitation and receiving coils of the traditional eddy current testing method are replaced by permanent magnets and magnetic field sensors respectively.Experimental test has shown that the principle of the new eddy current inspection method is feasible,the experimental device is simple and effective,and can reach an inspection accuracy level of 100 μm under existing experimental conditions.
copper alloy contact wiremicro particle defecteddy current inspectionpermanent magnetmagnetic sensor
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