Four-terminal scheme used in a two-terminal EIT system

Author

Chen, Jianjun ; Cao, Zhang ; Xu, Lijun

Author_Institution

Sch. of Instrum. Sci. & Opto-Electron. Eng., Beihang Univ., Beijing, China

fYear

2011

fDate

10-12 May 2011

Firstpage

1

Lastpage

5

Abstract

In this paper, mutual conversions were implemented between the two-terminal and four-terminal schemes, which would bring convenience of measurement for the EIT, while not affecting the image quality. A portable two-terminal EIT system based on AD5933 was designed. This system, under the control of a PC via the USB interface, could sweep frequency to achieve a high precision in impedance measurement by means of impedance spectroscopy. Simulation results verified that the conversion formula worked and showed that the effect of image reconstruction using a four-terminal measurement scheme was better than using a two-terminal measurement scheme. Experimental results will be given later.

Keywords

computerised tomography; electric impedance imaging; electric impedance measurement; image reconstruction; AD5933; EIT measurement; USB interface; electrical impedance tomography; four-terminal scheme; image reconstruction; impedance measurement; impedance spectroscopy; two-terminal EIT system; Decision support systems; Electrical Impedance Tomography; Four-terminal Scheme; Impedance Spectroscopy; Sensitivity Matrix; Tikhonov Regularization; Two-terminal Scheme;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE

Conference_Location

Binjiang

ISSN

1091-5281

Print_ISBN

978-1-4244-7933-7

Type

conf

DOI

10.1109/IMTC.2011.5944264

Filename

5944264