A perturbation approach for the modeling of eddy current nondestructive testing problems with differential probes

被引：17

作者：

Sabariego, Ruth V. ^{[1
]}

Dular, Patrick ^{[1
]}

机构：

[1] Univ Liege, Dept Elect Engn & Comp Sci, Inst Montefiore, B-4000 Liege, Belgium

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2007年 / 43卷 / 04期

关键词：

eddy currents; finite element method; nondestructive testing; perturbation method;

D O I：

10.1109/TMAG.2007.892398

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：

A perturbation technique applied to the finite element modeling of eddy current nondestructive testing (ECNDT) problems is developed for taking into account differential probes. It concerns a h-conform formulation. The source term of the formulation is directly determined by the projection of the unperturbed field in a relatively small region around the defect. The voltage change due to the presence of the flaw is calculated by performing an integral over the defect and a layer of elements in the exterior domain that touch its boundary. The considered test case involves a shielded differential probe scanning the surface of a metal specimen for the detection of flaws.

引用

页码：1289 / 1292

页数：4

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