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Development of Low-Cost, Non-Obtrusive Electrical Impedance Tomography Device for Liquid-Gas Flow Visualization

M. S. Mat-Shayuti 1, H. Zulkifli 1, E. Yahya 1, N. H. Othman 1,and Z. Hassan 2
1. Universiti Teknologi MARA/Faculty of Chemical Engineering, Shah Alam, Malaysia
2. Universiti Malaysia Pahang/Faculty of Chemical & Natural Resources Engineering, Pekan, Malaysia

Abstract—The high cost of flow visualization equipment on the market hinders more active exploration in flow science. This paper presents a development of low-cost, non-obtrusive electrical impedance tomography (EIT) device for two-phase (liquid-gas) flow visualization. The device consists of three main hardware; an Arduino microcontroller as processor and communicators between components, a customized printed circuit board to control current injection and voltage measurement, and sensors band which consists of sixteen copper electrodes. During testing, the sensors band was enclosed around a cylindrical phantom tank filled with water. The sensing field then was stimulated by injecting current to the sensors of copper electrodes. Next, the measured voltage values were imported to MATLAB and interfaced with electrical impedance tomography and diffuse optical tomography reconstruction software (EIDORS) software for reconstruction of test images. The system capitalized on the different conductivity values of water and air, with the reconstructed images showed excellent agreement with the test images. 
Index Terms—electrical impedance tomography, flow visualization, tomography

Cite: M. S. Mat-Shayuti, H. Zulkifli, E. Yahya1, N. H. Othman, and Z. Hassan, "Development of Low-Cost, Non-Obtrusive Electrical Impedance Tomography Device for Liquid-Gas Flow Visualization," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 8, No. 2, pp. 119-126, March 2019. Doi: 10.18178/ijeetc.8.2.119-126