Crack inversion based on measuring leakage magnetic field by InAs Hall element

被引：0

作者：

Minkov, D ^{[1
]}

Shoji, T ^{[1
]}

Lee, J ^{[1
]}

机构：

[1] Tohoku Univ, Dept Mech Engn, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (V) | 2001年 / 21卷

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An approach is proposed for determining the maximum depth and the width of surface cracks in magnetic materials. The approach is based on measuring leakage magnetic field in the vicinity of a crack by a Hall element, and a dipole model of a crack. The unknown crack parameters are computed by crack inversion, which represents a regression for die Hall voltage distribution measured along only one line, on the surface of the material, passing through the crack centre. Hall voltage distributions are measured on ferromagnetic steel specimens by InAs Hall element. Crack inversions are performed for cracks with rectangular, and isosceles triangular cross-sections along the long crack axis. The fast and accurate determining die maximum crack depth, and the crack width by such crack inversions could be used in pipeline inspection.

引用

页码：113 / 120

页数：4