An analytical approach for modelling electro‐magnetic tomography sensor

An analytical approach for modelling electro‐magnetic tomography sensor Purpose – The purpose of this paper is to present an analytical model and implementation of a prototype electro‐magnetic tomography (EMT) sensor system. Sensitivity maps for an EMT sensor are usually calculated using a numerical approach, such as the finite element method (FEM). While FEM can produce accurate results for any geometrical layout, intensive computation is needed to solve the forward problem and to obtain the sensitivity maps. An alternative approach is to develop an analytical model for the same purpose. Design/methodology/approach – Although the applicability of the analytical model is limited to certain geometrical cases, it provides a much faster means, in particular for calculating sensitivity maps, than FEM. The paper gives brief insight into the calculations and some details on its implementation. The results obtained with the analytical model are compared with FEM. Findings – The results having been obtained with the analytical model and compared with FEM, it has been shown that the differences are as small as 6 per cent and that the prototype EMT sensor system can reconstruct images with an error under 10 per cent (of the object size) in the true position. Originality/value – This is the first time an analytical model has been used to calculate sensitivity maps for EMT. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Sensor Review Emerald Publishing

An analytical approach for modelling electro‐magnetic tomography sensor

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Publisher
Emerald Publishing
Copyright
Copyright © 2008 Emerald Group Publishing Limited. All rights reserved.
ISSN
0260-2288
DOI
10.1108/02602280810882562
Publisher site
See Article on Publisher Site

Abstract

Purpose – The purpose of this paper is to present an analytical model and implementation of a prototype electro‐magnetic tomography (EMT) sensor system. Sensitivity maps for an EMT sensor are usually calculated using a numerical approach, such as the finite element method (FEM). While FEM can produce accurate results for any geometrical layout, intensive computation is needed to solve the forward problem and to obtain the sensitivity maps. An alternative approach is to develop an analytical model for the same purpose. Design/methodology/approach – Although the applicability of the analytical model is limited to certain geometrical cases, it provides a much faster means, in particular for calculating sensitivity maps, than FEM. The paper gives brief insight into the calculations and some details on its implementation. The results obtained with the analytical model are compared with FEM. Findings – The results having been obtained with the analytical model and compared with FEM, it has been shown that the differences are as small as 6 per cent and that the prototype EMT sensor system can reconstruct images with an error under 10 per cent (of the object size) in the true position. Originality/value – This is the first time an analytical model has been used to calculate sensitivity maps for EMT.

Journal

Sensor ReviewEmerald Publishing

Published: Jun 27, 2008

Keywords: Modelling; Sensors; Image sensors; Electromagnetism

References

  • The complexity of theorem‐proving procedures
    Cook, S.
  • Electrical conductivity imaging via contactless measurements
    Gencer, N.G.; Tek, M.N.
  • The magnetic field of current‐carrying polygons: an application of vector field rotations
    Grivich, M.I.; Jackson, D.P.

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