Title :
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
fDate :
4/1/2000 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
