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Wireless power transfer-based eddy current non-destructive testing using a flexible printed coil array: WPT based FPC-ECT

Lookup NU author(s): Dr Lawal Umar Daura, Professor Gui Yun TianORCiD, Qiuji Yi



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2020 The Authors. Eddy current testing (ECT) has been employed as a traditional non-destructive testing and evaluation (NDT&E) tool for many years. It has developed from single frequency to multiple frequencies, and eventually to pulsed and swept-frequency excitation. Recent progression of wireless power transfer (WPT) and flexible printed devices open opportunities to address challenges of defect detection and reconstruction under complex geometric situations. In this paper, a transmitter-receiver (Tx-Rx) flexible printed coil (FPC) array that uses the WPT approach featuring dual resonance responses for the first time has been proposed. The dual resonance responses can provide multiple parameters of samples, such as defect characteristics, lift-offs and material properties, while the flexible coil array allows area mapping of complex structures. To validate the proposed approach, experimental investigations of a single excitation coil with multiple receiving coils using the WPT principle were conducted on a curved pipe surface with a natural dent defect. The FPC array has one single excitation coil and 16 receiving (Rx) coils, which are used to measure the dent by using 21 C-scan points on the dedicated dent sample. The experimental data were then used for training and evaluation of dual resonance responses in terms of multiple feature extraction, selection and fusion for quantitative NDE. Four features, which include resonant magnitudes and principal components of the two resonant areas, were investigated for mapping and reconstructing the defective dent through correlation analysis for feature selection and feature fusion by deep learning. It shows that deep learning-based multiple feature fusion has outstanding performance for 3D defect reconstruction of WPT-based FPC-ECT. This article is part of the theme issue 'Advanced electromagnetic non-destructive evaluation and smart monitoring'.

Publication metadata

Author(s): Daura LU, Tian G, Yi Q, Sophian A

Publication type: Article

Publication status: Published

Journal: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

Year: 2020

Volume: 378

Issue: 2182

Print publication date: 16/10/2020

Online publication date: 14/09/2020

Acceptance date: 05/07/2020

Date deposited: 26/07/2021

ISSN (print): 1364-503X

ISSN (electronic): 1471-2962

Publisher: Royal Society Publishing


DOI: 10.1098/rsta.2019.0579

PubMed id: 32921233


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