Modeling and analysis of magnetic dipoles in weak magnetic field

被引：2
|
作者：
Wang, Zhaoxia [1 ]
Zhang, Weimin [2 ]
Liu, Hongguang [3 ]
机构：
[1] Beijing Dwell Petr & Gas Dev Co Ltd, Beijing 100085, Peoples R China
[2] Beijing Inst Technol, Sch Mech & Vehicular Engn, Beijing 100081, Peoples R China
[3] Beijing Forestry Univ, Sch Mat Sci & Technol, Beijing 100083, Peoples R China
来源：
FRONTIERS OF MECHANICAL ENGINEERING | 2008年 / 3卷 / 02期
基金：
北京市自然科学基金;
关键词：
magnetic dipole; leak field; zero line; metal magnetic memory;
D O I：
10.1007/s11465-008-0028-z
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The magnetic leakage field distribution resulting from linear defects of a tube sample in the geomagnetic field is modeled according to the magnetic dipole theory. The formula to compute the normal component of the weak magnetic field is deduced based on the spatial distribution of the magnetic dipole. The shape and characteristics of the zero line (an important criterion for magnetic memory testing) of the normal field is analyzed under different longitudinal magnetizations. Results show that the characteristics of the zero line should be considered when the metal magnetic memory testing method is used to find and locate the defect.
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页码：222 / 225
页数：4
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