【摘 要】
：
An Equipment based on magnetic flux leakage method to inspect internal defects with diameters that is no more than 0.13mm is introduced.and it is able to The magnetic flux leakage method to inspect in
【机 构】
：
Engineering Institute of Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China
【出 处】
：
第十届中国钢铁年会暨第六届宝钢学术年会
论文部分内容阅读
An Equipment based on magnetic flux leakage method to inspect internal defects with diameters that is no more than 0.13mm is introduced.and it is able to The magnetic flux leakage method to inspect internal defects in steel sheet is based on ferro-magnetic materials magnetic phenomena in magnetic fields.It works by magnetic resistance sensors,which detect defects by closing to the steel strip with a small lift-off distance.The steel strip is magnetized int saturated status by a DC magnetizer.If theres any defects in a ferro-magnetic material,magnetic flux leakage field will appear in the surface of the defects and then it will be inspected by the sensors.After the signal is captured to process system,the defects information can be displayed by filtering and processing the signal.After the signal is captured,the wavelet analysis method pre-processes the signal and then the size of defects can be calculated by statistical method or neural network method.In the end,the difficulties and technical trend for applications of magnetic flux leakage detecting technology in future has been discussed.
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