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An automated self-calibrated instrument for nondestructive testing on conductive materials

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4 Author(s)
Bernieri, A. ; Univ. of Cassino, Italy ; Betta, G. ; Ferrigno, L. ; Laracca, M.

An instrument for nondestructive testing in industrial environments was designed, set up, and tested. It uses fluxset magnetic sensors and is based on dedicated boards suitably set up to optimize system performances with no loss in flexibility. A self-calibration and adjustment capability was implemented, thus allowing the instrument to operate optimally in different environments. A fast Fourier transform-based algorithm was used for both probe adjustment and measurement postprocessing. The assembled instrument was then tested on specimens with known cracks, showing a very good agreement between theoretical and experimental results.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:53 ,  Issue: 4 )