Design and Development of Low-cost Electrical Impedance Tomography

Abstract

This paper presents the design and development of a low-cost Electrical Impedance Tomography (EIT) device. The various subsystems, sinusoidal oscillator, voltage-to-current converter (V/I), multiplexer microcontroller (Arduino UNO R3) is incorporated to be transmitter and receiver. The current-feedback OPAMP (CFOA) is required as a V/I converter.  The sinusoidal current injects into the probes located in circular vessel positions in the transmitter. The rectifier circuit and multiplexer provide multiple positions receiving signals. The receiving signals have been converted to digital signals and sent to reconstruct to detect the vessel's object. The MATLAB-based EIDORS finite element program is used to generate the image from the receiving data. The experimental results have confirmed the workability of the different conductivity objects tested in the vessel.