Image reconstruction in adaptive electrical capacitance volume tomography using nonuniform voltage excitation envelopes

Electrical capacitance volume tomography(ECVT) is a simple-structure and low-cost imaging technique. ECVT is used to reconstruct an image of the permittivity distribution in the three-dimensional(3-D) domain with the limited capacitance measurements and sensitivity map by a suitable reconstruction algorithm. We can get the predicted image of higher resolution by improving the sensitivity map and the capacitance value and image reconstruction methods. In this paper, we contrast the quality of the reconstruction image between ECVT system and adaptive electrical capacitance volume tomography(AECVT) system. The experiment sensors used for comparison are the same size but different plates: conventional and synthetic which are both excited by single voltage. Then, we investigate the effect of different voltage envelopes on the quality of reconstruction image in AECVT. The examples are presented to demonstrate that AECVT system is slightly superior to ECVT system for single voltage excitation. Further more, for AECVT system, it can improve the 3-D reconstruction performance by using voltage excitations of multiple amplitudes and changing the voltage position.