High-Tc SQUIDs and eddy-current NDE: a comprehensive investigation from real data to modeling - Archive ouverte HAL Access content directly
Journal Articles Measurement Science and Technology Year : 2000

High-Tc SQUIDs and eddy-current NDE: a comprehensive investigation from real data to modeling

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Abstract

The interest in magnetometry for eddy-current non-destructive testing, e.g. of planar conductive structures encountered in the aircraft industry, using high-temperature superconducting quantum interference devices (SQUIDs) is primarily due to their high sensitivity to magnetic flux even at very low frequencies. Here it is shown how theoretical, numerical and measurement machineries are combined to get reasonable synthetic and experimental data and to reach a good understanding of the interaction of diffusive wavefields with a damaged non-magnetic metal plate (as a first step towards the retrieval of pertinent features of the defects). The measurement modalities are considered first. It is illustrated in some detail how laboratory-controlled experiments are performed by a SQUID-based probe displaced above artificially damaged plates. Experimental data are then confronted with simulation results in order to evaluate the accuracy and reliability of this measurement system.

Dates and versions

hal-00637523 , version 1 (02-11-2011)

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Cite

Adele Ruosi, Massimo Valentino, G. Pepe, Vikass Monebhurrun, Dominique Lesselier, et al.. High-Tc SQUIDs and eddy-current NDE: a comprehensive investigation from real data to modeling. Measurement Science and Technology, 2000, 11 (11), pp.1639-1648. ⟨10.1088/0957-0233/11/11/314⟩. ⟨hal-00637523⟩
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