Analysis of the effect of stray capacitance on a charge/discharge-based electrical capacitance tomography system

Optik ◽  
2013 ◽  
Vol 124 (23) ◽  
pp. 6009-6012 ◽  
Author(s):  
Qi Fang Liu ◽  
Yan Han
Keyword(s):  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Stray Capacitance ◽  
Tomography System ◽  
A Charge ◽  
Capacitance Tomography ◽  
Charge Discharge

Electric Potential Distribution of Electrical Capacitance Tomography System at the Centre of Pipe Based on Segmented Excitation

2013 ◽  
Vol 64 (5) ◽  
Author(s):  
Shahrulnizahani Mohammad Din ◽  
Ruzairi Abdul Rahim ◽  
Leow Pei Ling
Keyword(s):  
Electric Potential ◽  
Pipe Flow ◽  
Potential Distribution ◽  
Electrical Potential ◽  
Comsol Multiphysics ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Tomography System ◽  
Resolution Problem ◽  
Capacitance Tomography

Electrical capacitance tomography (ECT) is one of the systems used to inspect closed pipe flow. This paper will present the proposed segmented excitation of electrodes with a focus on the low resolution problem.  Modelling of 8, 12 and 16 electrodes is done using COMSOL Multiphysics. The number of excitation electrodes is increased until half of the electrodes are excited at the same time. The electrical potential distribution is analyzed and the voltage value at the centre of the pipe is captured. The results show that there is improvement of electrical potential and voltage value in proportion to the number of electrodes excited at the same.

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