Comparison of defect detection limits in Lorentz force eddy current testing and classical eddy current testing

Lorentz force eddy current testing (LET) is a motion-induced eddy current testing method in the framework of nondestructive testing. In this study, we address the question of how this method is classified in comparison with a commercial eddy current testing (ECT) measurement device ELOTEST N300 in c...

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Bibliographic Details
Published in:Journal of sensors and sensor systems 2018-07, Vol.7 (2), p.453-459
Main Authors: Otterbach, Jan Marc, Schmidt, Reinhard, Brauer, Hartmut, Ziolkowski, Marek, Topfer, Hannes
Format: Article
Language:English
Subjects:
Applied research
Defects
Eddies (Fluid dynamics)
Eddy current testing
Eddy currents
Excitation spectra
Frequency spectrum
Lorentz force
Measurement methods
Methods
Nondestructive testing
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Summary:Lorentz force eddy current testing (LET) is a motion-induced eddy current testing method in the framework of nondestructive testing. In this study, we address the question of how this method is classified in comparison with a commercial eddy current testing (ECT) measurement device ELOTEST N300 in combination with the probe PKA48 from Rohmann GmbH. Therefore, measurements using both methods are performed and evaluated. Based on the measurement results, the corresponding defect detection limits, i.e., up to which depth the defect can be detected, are determined and discussed. For that reason, the excitation frequency spectrum of the induced eddy currents in the case of LET is considered.
ISSN:2194-878X
2194-8771
2194-878X
DOI:10.5194/jsss-7-453-2018