Sensitivity Field Analysis of Adaptive Electrical Capacitance Volume Tomography in Square Sensor

Electrical Capacitance Tomography (ECT) is a branch of Process Tomography based on capacitance-sensitive mechanism, which has the advantages of simple structure, low cost, high speed and relatively safe. To ensure the accuracy of image reconstruct, a large amount of research on sensitivity field is necessary. In this paper, we compared the differences of sensitivity fields between Electrical Capacitance Volume Tomography (ECVT) and Adaptive Electrical Capacitance Tomography (AECVT) system at first, studied the imaging characteristics of a regular symmetrical square sensor by a fast calculation method of three-dimensional AECVT sensitivity based on electric intensity, to simulate and analyze square tubes applied in some industries. Excited by different voltage envelopes synthetic plates adopted in AECVT system provides more variations and possibilities for imaging. The experiment explores the effects of different voltage packaging parameters on a series of characteristics such as the size and uniformity of the sensitivity field, in the hope that it will stimulate further research.