Title :
Analysis of Performance and Capacitance Sensitivity Distributions of Sensor for Electrical Capacitance Tomography System
Author :
Sun, Liquan ; Chen, Deyun ; Zheng, Guibin
Author_Institution :
Coll. of Comput. Sci. & Technol., Harbin Univ. of Sci. & Technol.
Abstract :
The sensitivity-field distribution of sensors in the electrical capacitance tomography (ECT) system is influenced by the distribution of multiphase-flow media, and the soft-field characteristics can bring great difficulty into image reconstruction. The subject investigated of this paper is major in the ECT system of 8-electrode oil-water two-phase flow. According to the method of finite element simulation, we can analyze the influence of radial electrodes and their embedded sizes on capacitance values and the distribution of sensitivity field in the system, and the embedded sizes of radial electrodes can be determined based on the simulation analysis. Then the dynamic variation range of measured capacitance values and the difficulty in designing the data acquisition circuit can be reduced, the sensitivity of capacitance response is increased, and the sensitivity-field distribution of sensors and the performance of the ECT system are also improved
Keywords :
capacitance measurement; capacitive sensors; computerised tomography; electric impedance imaging; image reconstruction; sensitivity analysis; 8-electrode oil-water two-phase flow; capacitance response; capacitance sensitivity distribution; data acquisition circuit; electrical capacitance tomography system; finite element simulation; image reconstruction; multiphase-flow media; radial electrodes; sensor; soft-field characteristics; Analytical models; Capacitive sensors; Electrical capacitance tomography; Electrodes; Finite element methods; Image reconstruction; Image sensors; Performance analysis; Sensor phenomena and characterization; Sensor systems; Capacitance sensitivity field Finite Element; Electrical Capacitance Tomograph; Radial electrode; Simulation;
Conference_Titel :
Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on
Conference_Location :
Dalian
Print_ISBN :
1-4244-0332-4
DOI :
10.1109/WCICA.2006.1713334
