A Methodology to Assist in Improvements of Low-cost Electrical Impedance Tomography Systems

Authors

Keywords:

Electrical Impedance Tomography (EIT), Data Acquisition Design, Error Analysis, Instrumentation, Measurement

Abstract

Electrical Impedance Tomography (EIT) is a technique that enables the reconstruction of the impedance distributions inside a vessel in a multiphase flow of industrial processes. Such a technique combines a data acquisition (DAQ) system to inject a current and to measure the voltages on the sensors and an inverse problem technique to reconstruct the image properly. This problem is highly ill-conditioned, causing errors to produce instabilities. Therefore, when performing the acquisition, the DAQ system must have adequate accuracy to allow the reconstruction of images with good quality. To avoid these measurement inaccuracies, this paper introduces a methodology that aid in the process of development of low-cost systems. It consists of investigating the errors in the current version of the system. Further, predicting the systematic errors of each subsystem by modeling its frequency response by Simulation Program with Integrated Circuit Emphasis (SPICE). From this information, it is possible to perform critical analysis, aiding design decisions.

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Author Biographies

Bruno Furtado de Moura, Universidade Federal de Catalão

Bruno de Moura received the B.Eng. and M.Sc. degrees in Mechanical Engineering from the Federal University of Espírito Santo (UFES), Vitória, Espírito Santo, Brazil, in 2012 and 2014, and received the D.Sc. degree in Mechanical Engineering Computacional Methods from the same university in 2020. In the same year he graduated, he joined and is currently Assistant Professor at the Federal University of Catalão. His topics of interest are inverse problem applied to engineering processes, and thermal and fluid flow modeling and instrumentation, such as electrical impedance tomography development.

Adriana Machado Malafaia da Mata, Universidade Federal do Espírito Santo

Adriana da Mata is a Ph.D. student in Mechanical Engineering at UFES. Her work focuses specifically on Electrical Impedance Tomography (EIT) and its application in multiphase mixtures. She was born in Minas Gerais (Brazil) and studied Chemical Engineeringat UCL, ES-Brazil (B.Eng. 2015). Then she joined Mechanical Engineering at UFES (M.Sc. 2017 and Ph.D. in progress).

Márcio Ferreira Martins, Universidade Federal do Espírito Santo

Marcio Martins is a Professor of Thermal Science at the Department of Mechanical Engineering of
UFES. His research is centered on multiphase reactive processes in thermal systems. His work aims
to study alternative paths to reduce energy waste by developing measurement devices and analysis
methods for high-temperature processes and systems. He was born in Amazon (Brazil). He studied
Mechanical Engineering at the Federal University of Para (B.Eng. 2003, M.Sc. 2005), and after at the University of Toulouse (Ph.D. 2008). Marcio joined UFES in 2009.

Francisco Hernan Sepulveda Palma, Universidad de Santiago de Chile

Francisco Sepúlveda Palma obtained his bachelor’s degree in applied physics in 2004 and an M.Sc.
degree in engineering physics in 2005 from the University of Santiago de Chile (Usach), Santiago,
Chile. He received a Ph.D. from the University of Toulouse, in 2009. Since 2012, he is an Associate
professor at the Department of Mechanical Engineering at Santiago University of Chile. He works on
heat transfer modeling and their implementation in the field of inverse problems for infrared images. Also on ultrasonics and automation and control.

Rogério Ramos, Universidade Federal do Espírito Santo

Rogério Ramos is Professor of Thermal Science and head of the Nucleus for Oil and Gas Flow Measurement (NEMOG) at the Department of Mechanical Engineering at UFES. His research is centered on flow measurement for the petroleum industry, developing techniques of measurements for multiphase systems. He was born in Vitoria-ES (Brazil) and studied Mechanical Engineering at UFES (B.Eng 1988, M.Sc. 1993), and after held his Ph.D. at the Federal University of Rio de Janeiro/ Cardiff University (1999). Rogério joined UFES in 1994.

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Published

2021-11-17

How to Cite

de Moura, B. F., da Mata, A. M. M., Martins, M. F. ., Palma, F. H. S., & Ramos, R. (2021). A Methodology to Assist in Improvements of Low-cost Electrical Impedance Tomography Systems. IEEE Latin America Transactions, 100(XXX). Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/5240

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