Regularization of the Inversion Process in Eddy Current Characterization of Superficial Defects

被引：2

作者：

Lopes Ribeiro, A. ^{[1
]}

Pasadas, D. ^{[1
]}

Ramos, H. G. ^{[1
]}

Rocha, T. ^{[1
]}

机构：

[1] Univ Lisbon, Inst Telecomunicacoes, Inst Super Tecn, Av Rovisco Pais, P-1049001 Lisbon, Portugal

来源：

ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (XIX) | 2016年 / 41卷

关键词：

Eddy Currents; Tikhonov regularization; regularization parameter;

D O I：

10.3233/978-1-61499-639-2-48

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper the inversion process is related to the eddy current evaluation of aluminum plates. A special probe that applies a spatially uniform excitation field is used. The excitation field is invariant under the probe translations and permits to simplify the resolution of the inverse problem. The inversion process consists on the approximate determination of the current density on the plate that permits the characterization of the defects geometry. The inversion is regularized by the Tikhonov method and the optimum regularization parameter is determined using the L-curve.

引用

页码：48 / 54

页数：7

共 5 条

[1]

Bertero M., 1998, Introduction to Inverse Problems in Imaging

[2]

Lopes Ribeiro A., 2013, REV PROGR QUANTITATI, V33, P1428

[3] Evaluation of portable ECT instruments with positioning capability [J].