Image reconstruction of spherical inclusions in ferromagnetic structures using the generalized inverse

Author

Bruno, A.C. ; Miranda, L. Couto ; Barbosa, C. Hall ; Lima, E. Andrade ; Kuhner, G.S.

Author_Institution

Dept. de Fisica, Pontificia Univ. Catolica do Rio de Janeiro, Brazil

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

2912

Lastpage

2915

Abstract

The generalized inverse method and singular value decomposition were used to reconstruct the magnetic image of small spherical inclusions in ferromagnetic structures. These techniques were used on the magnetic flux leakage generated when the structure is magnetized. The leakage field from the inclusions was simulated by using a simple constant-permeability model. The recovery model used a grid of magnetic dipoles at the region of the inclusions. The ability of the technique to distinguish between different distributions of inclusions with similar leakage fields is analyzed. The results demonstrates the feasibility of imaging multiple inclusions within the structure

Keywords

flaw detection; image reconstruction; inclusions; inverse problems; magnetic leakage; singular value decomposition; constant permeability model; ferromagnetic structure; generalized inverse method; image reconstruction; magnetic dipole; magnetic flux leakage; recovery model; singular value decomposition; spherical inclusion; Image reconstruction; Inverse problems; Magnetic confinement; Magnetic field measurement; Magnetic flux leakage; Magnetic materials; Magnetostatics; Permeability; Physics; Singular value decomposition;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717679

Filename

717679