International Society for Industrial Process Tomography

Three-dimensional nonstationary electrical impedance tomography with a single electrode layer

Jari. P. Kaipio1,2,3, Arto Voutilainen1,2, Anssi Lehikoinen1,2, Marko Vauhkonen1,2

1Department of Physics and Mathematics, University of Eastern Finland, P.O.Box 1627, FIN-

70211 Kuopio, Finland

2Numcore Ltd., Microkatu 1, FIN-70210 Kuopio, Finland

3Department of Mathematics, University of Auckland, Princes Street Auckland, New Zealand

ABSTRACT

In a tubular vessel equipping a single electrode layer, true three-dimensional electrical impedance tomography imaging is generally not considered possible. In a nonstationary setting, however, the accumulation of information over an epoch can possibly allow for 3D imaging if appropriate evolution models are available. Such an evolution model is the stochastic convection- diffusion model if the flow field is such that the main flow is along the tube. A single electrode layer sensor would obviously be much cheaper and could be installed in locations in which a multilayer sensor possibly could not be. In this paper we assess this possibility both computationally and experimentally. The results show that a single electrode layer system is a potential technique in nonstationary estimation.

Keywords Electrical impedance tomography, state estimation, electrode configuration