High Resolution Rotary Electrical Capacitance Tomography System

Javad Frounchi and Ali-Reza Bazzazi

Microelectronic and Microsensor Research Laboratory, Electrical Engineering Department, Faculty of Engineering, Tabriz University, Tabriz, Iran

Tel: +98 (0)411 3393722, Fax: +98 (0)411 3300829, Email: jfrounchi@tabrizu.ac.ir

ABSTRACT

A novel rotary electrical capacitance tomography system employs pairs of rotating electrodes to gather a large number of capacitance values. A high-speed capacitance measuring circuit converts the capacitance values to digital data and the data is sent via a wireless link to a host PC. A fast image reconstruction technique (Linear Back-Projection) is applied on the received data to reconstruct permittivity images. High resolution images of a plastic rod, a plastic tube and the rod inside the tube have been successfully produced. High quality and real-time images can be obtained with this system.

Keywords Rotary Electrical Capacitance Tomography, Capacitance measurement, Real-time ECT, non-invasive imaging.