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Elimination of liftoff effect using a model-based method for eddy current characterization of a plate

Lookup NU author(s): Dr Mengbao Fan, Dr Binghua Cao, Dr Wei Li, Professor Gui Yun Tian


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Model-based inversion method has been studied extensively for characterization of a metal plate in eddy current testing. However, few reports cover liftoff elimination. In this work, model-based inversion method is evaluated in terms of liftoff reduction. For better inversion accuracy, a complex yet accurate procedure is presented to do calibrations of coil parameters before use. The results from simulations and experiments demonstrate that model-based inversion method has an exceptional ability to compensate influence of large liftoff variations by considering it as an unknown variable to be determined.

Publication metadata

Author(s): Fan M, Cao B, Yang P, Li W, Tian GY

Publication type: Article

Publication status: Published

Journal: NDT & E International

Year: 2015

Volume: 74

Pages: 66-71

Print publication date: 01/09/2015

Online publication date: 29/05/2015

Acceptance date: 15/05/2015

ISSN (print): 0963-8695

ISSN (electronic): 1879-1174

Publisher: Elsevier Ltd


DOI: doi:10.1016/j.ndteint.2015.05.007


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