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http://dx.doi.org/10.7471/ikeee.2012.16.3.211

Phase boundary estimation with effective initial guess in electrical impedance tomography  

Kim, Bong-Seok (제주대학교 원자력과학기술연구소)
Kim, Sin (제주대학교 에너지공학과)
Kim, Kyung-Youn (제주대학교 전자공학과)
Publication Information
Journal of IKEEE / v.16, no.3, 2012 , pp. 211-216 More about this Journal
Abstract
In the phase boundary estimation problem, the estimation performance depends on the initial guess. However, there is no information on the number of bubbles and those positions for the initial guess in real flows. Therefore, it is very important to set appropriate initial guesses from prior information. In this paper, in order to set initial guesses for estimating the phase boundaries in two-phase flows, first, unknown resistivity distribution was estimated using the difference reconstruction method. After that, an adaptive threshold value was automatically computed using intermodes method. Based on this value, the number of bubbles and the initial position were determined. The numerical experiments have been performed to evaluate the estimation performance of the proposed method.
Keywords
electrical impedance tomography; boundary estimation; adaptive threshold; prior information;
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