VERIFICATION OF AN EDDY-CURRENT FLAW INVERSION ALGORITHM

被引：9

作者：

SABBAGH, HA ^{[1
]}

SABBAGH, LD ^{[1
]}

VERNON, SN ^{[1
]}

机构：

[1] USN,CTR SURFACE WEAP,MAT EVALUAT BRANCH,SILVER SPRING,MD 20910

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1986年 / 22卷 / 06期

关键词：

ELECTROMAGNETIC FIELDS - MATHEMATICAL TECHNIQUES - Algorithms - STAINLESS STEEL - TUBES;

D O I：

10.1109/TMAG.1986.1064665

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 eddy-current flaw inversion algorithm was experimentally verified as having 72% accuracy in the prediction of the shape, length (axial extent), and depth (radial extent) of flaws in stainless-steel tube walls. For calibration, the algorithm requires data from only one flaw of known type (inclusion, crack), shape, and dimensions. The algorithm is based on least-squares techniques and is implemented using a modified algebraic reconstruction technique. The electromagnetic model system is an integral equation which is then discretized by means of the method of moments. The algebraic reconstruction algorithm, which is iterative, is applied to the discretized system. The algorithm utilizes a parameter for smoothing and a relaxation parameter to accelerate convergence. A discussion of these matters and a description of the experimental procedure and results are given.

引用

页码：1881 / 1886

页数：6