Comparison of single and segmented excitation of electrical capacitance tomography

Electrical Capacitance Tomography is a modality which enables users to visualize and monitor the process flow in a closed pipe. It is a non-invasive and non-intrusive technique, yet, it suffers from soft-field effect which produces low resolution images. Segmented excitation is proposed in this paper to overcome the problem faced by ECT single excitation. The comparison between single and segmented excitation are presented in form of images and electrical potential value. From the 1^st switching, segmented excitation recorded 315% higher electrical potential compared to single excitation at the center of the pipe. From simulations, sensitivity maps are generated and compared between both excitation methods. The electrical potential for segmented excitation is well-distributed and produces 164% higher of average electrical potential compared to single excitation method.