The Mechanism of Forming Micro-magnetic Field around the Defect by Putting Magnetic Field on the Workpiece
The changes are analyzed including the domain structure inside the ferromagnetic materials and two side of the defect and the energy of the domain walls. It can be concluded that the defect in the ferromagnetic materials can fix the domain wall, the reverse potential wall in the side of the defect blocks the movement of the domain walls, then the micromagnetic fixed knot come into being around the defect. The direction of the magnetization whose normal component is discontinuous in the micromagnetic fixed knot decide the character of the flux magnetic field which contain the information of the defect, by testing this flux magnetic field,we can realize the defect testing.
Magnetization Defect Domain Micro-magnetic testing
LIU Meiquan XU Zhangsui CHEN Peng LI Jianzeng
Department of Electrical Engineering, Ordnance Engineering College, Shijiazhuang, Hebei, China, 050003
国际会议
第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)
重庆
英文
1248-1251
2009-08-01（万方平台首次上网日期，不代表论文的发表时间）