Potential measurement in ECT system

Potential measurement can be applied to electrical capacitance tomography (ECT) systems. However, the relationship between potential and the capacitance is not well understood. This paper reveals that a potential is dependent on the capacitance ratio for a given excitation voltage, independent of capacitance themselves. The conditions for using this method are discussed. Finally, image reconstruction based on the Generic Algorithm for Electrical Capacitance Tomography (GA-ECT) is implemented satisfactorily for square and circular sensors respectively.