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Lookup NU author(s): John Wilson,
Professor Gui Yun TianORCiD
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There is a need for a pulsed eddy current (PEC) to detect very small defects and deep buried subsurface flaws reliably in metallic structures such as aircraft wings. This paper reports an investigation into the sensitivity for a pancake PEC probe to variations in the material conductivity of specimens. Three experimental coil parameters are modelled: (a) coil inner radius, (b) coil width and (c) coil height. Based on the predicted signals, the sensitivity of the PEC probe as a function of coil parameters has been formulated. Through matrix numerical simulation experiments using orthogonal array, the weighting of each parameter to the sensitivity has been derived. Subsequently, a theoretical model for probe optimisation is established in order to realise the maximum sensitivity, based on which a probe is designed with improved sensitivity.
Author(s): Wilson J, Tian GY, Abidin IZ, Yang SX, Almond D
Publication type: Article
Publication status: Published
Journal: Nondestructive Testing and Evaluation
Print publication date: 01/01/2010
ISSN (print): 1058-9759
ISSN (electronic): 1477-2671
Publisher: Taylor & Francis
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