A measurement system based on magnetic sensors for nondestructive testing

Author

Bernieri, Andrea ; Betta, Giovanni ; Rubinacci, Guglielmo ; Villone, Fabio

Author_Institution

Dept. of Automation Electromagnetism, Inf. Eng. & Ind. Math., Univ. of Cassino, Italy

Volume

49

Issue

2

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

455

Lastpage

459

Abstract

The paper deals with a measurement system based on a low-cost eddy current probe for nondestructive testing (NDT) on conducting materials aimed at reconstructing the shape and position of thin cracks. The magnetic probe is characterized, highlighting good repeatability, linearity, and overall accuracy. A number of different measurement approaches are investigated, in order to choose the most appropriate for NDT applications. A numerical method is then illustrated; it proves to be able to reconstruct cracks starting from noisy measurement data

Keywords

crack detection; eddy current testing; inverse problems; magnetic sensors; conducting materials; crack position reconstruction; crack shape reconstruction; direct problem; fluxset probe; genetic algorithms; inverse problem; linearity; low-cost eddy current probe; magnetic sensors; measurement system; noisy measurement data; nondestructive testing; repeatability; soft magnetic materials; thin cracks; Conducting materials; Current measurement; Eddy currents; Linearity; Magnetic noise; Magnetic sensors; Nondestructive testing; Position measurement; Probes; Shape measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.843095

Filename

843095