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Arts of electrical impedance tomographic sensing

This paper reviews governing theorems in electrical impedance sensing for analysing the relationships of boundary voltages obtained from different sensing strategies. It reports that both the boundary voltage values and the associated sensitivity matrix of an alternative sensing strategy can be deri...

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Detalles Bibliográficos
Autores principales: Wang, Mi, Wang, Qiang, Karki, Bishal
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4874380/
https://www.ncbi.nlm.nih.gov/pubmed/27185968
http://dx.doi.org/10.1098/rsta.2015.0329
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author Wang, Mi
Wang, Qiang
Karki, Bishal
author_facet Wang, Mi
Wang, Qiang
Karki, Bishal
author_sort Wang, Mi
collection PubMed
description This paper reviews governing theorems in electrical impedance sensing for analysing the relationships of boundary voltages obtained from different sensing strategies. It reports that both the boundary voltage values and the associated sensitivity matrix of an alternative sensing strategy can be derived from a set of full independent measurements and sensitivity matrix obtained from other sensing strategy. A new sensing method for regional imaging with limited measurements is reported. It also proves that the sensitivity coefficient back-projection algorithm does not always work for all sensing strategies, unless the diagonal elements of the transformed matrix, A(T)A, have significant values and can be approximate to a diagonal matrix. Imaging capabilities of few sensing strategies were verified with static set-ups, which suggest the adjacent electrode pair sensing strategy displays better performance compared with the diametrically opposite protocol, with both the back-projection and multi-step image reconstruction methods. An application of electrical impedance tomography for sensing gas in water two-phase flows is demonstrated. This article is part of the themed issue ‘Supersensing through industrial process tomography’.
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spelling pubmed-48743802016-06-28 Arts of electrical impedance tomographic sensing Wang, Mi Wang, Qiang Karki, Bishal Philos Trans A Math Phys Eng Sci Articles This paper reviews governing theorems in electrical impedance sensing for analysing the relationships of boundary voltages obtained from different sensing strategies. It reports that both the boundary voltage values and the associated sensitivity matrix of an alternative sensing strategy can be derived from a set of full independent measurements and sensitivity matrix obtained from other sensing strategy. A new sensing method for regional imaging with limited measurements is reported. It also proves that the sensitivity coefficient back-projection algorithm does not always work for all sensing strategies, unless the diagonal elements of the transformed matrix, A(T)A, have significant values and can be approximate to a diagonal matrix. Imaging capabilities of few sensing strategies were verified with static set-ups, which suggest the adjacent electrode pair sensing strategy displays better performance compared with the diametrically opposite protocol, with both the back-projection and multi-step image reconstruction methods. An application of electrical impedance tomography for sensing gas in water two-phase flows is demonstrated. This article is part of the themed issue ‘Supersensing through industrial process tomography’. The Royal Society Publishing 2016-06-28 /pmc/articles/PMC4874380/ /pubmed/27185968 http://dx.doi.org/10.1098/rsta.2015.0329 Text en © 2016 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Articles
Wang, Mi
Wang, Qiang
Karki, Bishal
Arts of electrical impedance tomographic sensing
title Arts of electrical impedance tomographic sensing
title_full Arts of electrical impedance tomographic sensing
title_fullStr Arts of electrical impedance tomographic sensing
title_full_unstemmed Arts of electrical impedance tomographic sensing
title_short Arts of electrical impedance tomographic sensing
title_sort arts of electrical impedance tomographic sensing
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4874380/
https://www.ncbi.nlm.nih.gov/pubmed/27185968
http://dx.doi.org/10.1098/rsta.2015.0329
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