Title :
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
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE
Conference_Location :
Binjiang
Print_ISBN :
978-1-4244-7933-7
DOI :
10.1109/IMTC.2011.5944264
