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A three-dimensional inverse finite-element method applied to experimental eddy-current imaging data.

Soleimani, M. and Lionheart, W. R. B. and Peyton, A. J. and Ma, Xiandong and Higson, S. R. (2006) A three-dimensional inverse finite-element method applied to experimental eddy-current imaging data. IEEE Transactions on Magnetics, 42 (5). 1560 -1567. ISSN 0018-9464

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    Abstract

    Eddy-current techniques can be used to create electrical conductivity mapping of an object. The eddy-current imaging system in this paper is a magnetic induction tomography (MIT) system. MIT images the electrical conductivity of the target based on impedance measurements from pairs of excitation and detection coils. The inverse problem here is ill-posed and nonlinear. Current state-of-the-art image reconstruction methods in MIT are generally based on linear algorithms. In this paper, a regularized Gauss-Newton scheme has been implemented based on an edge finite-element forward solver and an efficient formula for the Jacobian matrix. Applications of Tikhonov and total variation regularization have been studied. Results are presented from experimental data collected from a newly developed MIT system. The paper also presents further progress in using an MIT system for molten metal flow visualization in continuous casting by applying the proposed algorithm in a real experiment in a continuous casting pilot plant of Corus RD&T, Teesside Technology Centre.

    Item Type: Article
    Journal or Publication Title: IEEE Transactions on Magnetics
    Additional Information: "©2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." "This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder."
    Uncontrolled Keywords: Edge finite-element method ; inverse problems ; magnetic induction tomography ; total variation regularization
    Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
    Departments: Faculty of Science and Technology > Engineering
    ID Code: 34926
    Deposited By: Dr Xiandong Ma
    Deposited On: 15 Dec 2010 09:19
    Refereed?: Yes
    Published?: Published
    Last Modified: 24 Jan 2014 05:19
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/34926

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