Journal
MEASUREMENT SCIENCE AND TECHNOLOGY
Volume 13, Issue 12, Pages 1855-1861Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-0233/13/12/308
Keywords
contact impedance; conductivity; electrical impedance tomography; estimation; process monitoring
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In this paper, we examine how the estimation method of the electrode contact impedances proposed earlier works in two different laboratory experiments. In the first experiment, the performance of the method was studied for a tank filled with a homogeneous liquid. In this case a single parameter for the contact impedances was used. In the second experiment the method was tested with a single target within a tank. In this case the contact impedances on all the electrodes were estimated. It was found that in the two-electrode measurement protocol the estimation of the electrode contact impedances improves reconstructions substantially. If only a single electrode contact impedance value for all the electrodes was estimated it was found that in certain cases it was not adequate.
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