Research of an Internal Defects Detection Equipment for Steel Sheet Based on Magnetic Flux Leakage
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 material”s 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 there”s 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.
magnetic flux leakage detection internal defect magnetizing
Shi Guifen He Yonghui Zhang Qing
Engineering Institute of Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China East China Normal University,Shanghai 200062,China
国内会议
上海
英文
1-7
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）