Improvement of AC-based Electrical Capacitance Tomography Hardware
Electrical Capacitance Tomography (ECT) is used to obtain the permittivity distribution of material, measuring capacitances between electrodes, placed around material. ECT is fast, non-invasive and low cost imaging system. A particular difficulty with capacitance measurement of an ECT hardware is to measure small capacitance changes between electrodes of sensors having large stray and standing capacitances. This paper presents an improved design of AC-based ECT hardware. Presented hardware is more stable, flexible, effective and suitable for electrical conductance tomography also. New concepts for hardware design and measurement algorithm are presented and proved by simulation.
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