Augmenting resolution capabilities of image reconstruction in adaptive electrical capacitance tomography

In adaptive electrical capacitance tomography (AECT), synthetic electrodes of different sizes are formed by combining the smaller electrode segments. Different sized electrodes can be employed to interrogate different regions of the sensing domain since smaller synthetic electrodes provide higher resolution at the periphery of the domain while larger electrodes are preferred to interrogate the center region of the domain for providing higher signal-to-noise ratio. AECT also enables electronic scanning of (synthetic) electrodes. In this work, we investigate the resolution capabilities of AECT that are achieved by employing electronic scanning and different sized electrodes. Ill-conditioning effects caused by the underdetermined nature of the problem are also investigated by a singular value decomposition analysis of the sensitivity matrix. We also check robustness of reconstruction algorithm against noise.