Cylindrically symmetric forward model in electrical impedance tomography with probe geometry

A. Nissinena , L. Heikkinena, D. Sbarbarob, M. Vauhkonena

aDepartment of Applied Physics, University of Eastern Finland, P.O. Box 1627, FIN-70211 Kuopio, Finland

bDepartment of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile

Abstract

One possible technique to monitor froth flotation and sedimentation processes is to use electrical impedance tomography (EIT) with a probe sensor. Full three dimensional reconstruction is possible, however, it leads to time consuming reconstructions. For reducing the computation time and simplifying the reconstruction procedure two different reduced forward models are studied. In the first model, the conductivity is considered to be rotationally invariant. In the second model, the conductivity is considered to be invariant also in the radial direction. The simulations show that feasible reconstructions and significant reduction in reconstruction time can be obtained using reduced forward model.

Keywords: electrical impedance tomography; probe sensor, cylindrical symmetry; 2D model; 1D model; approximation error