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  • Pozycja
    Improvement of electrical capacitance tomography hardware
    (Wydawnictwo Politechniki Łódzkiej, 2010) Wajman, Radosław; Nowakowski, Jacek; Styra, Darius
    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 ECT hardware is to measure small capacitance changes between electrodes of sensors having large stray and standing capacitances. The paper consists of two main parts: Improvement of AC - based ECT new a compact ECT hardware. Improved AC-based ECT hardware is more stable, flexible, effective and suitable for electrical conductance tomography; new concepts for hardware design and measurement algorithm are presented and proved by simulation. A new generation, completely different from classical ECT hardware is presented as a Compact ECT. The main advantages of compact ECT hardware are compact size, low power consumption and low price; these advantages achieved using new method of stray capacitance compensation.