Simulation study of the sensing field in electromagnetic tomography for two-phase flow measurement

The sensing field in the electromagnetic tomography (EMT) system has been studied based on a novel parallel excitation which uses a flexible circuit strips array. The principle of parallel excitation is analyzed. To find out the interaction between the excitation field and the object field which is produced by conductive and/or ferromagnetic materials in the measured space, both empty sensing field and object sensing field are simulated using the finite element method (FEM). The simulation result shows that this kind of parallel excitation is an effective solution of an EMT excitation system. A discussion of the dual mode imaging in EMT is also included.