Design of Sensor Array for Electrical Capacitance Tomography With High Voltage Excitation

LU: De-cai; WANG Yan; SHAO Fu-qun

Journal of Beijing University of Technology > 2014 > 40(7): 974-979.

LU: De-cai, WANG Yan, SHAO Fu-qun. Design of Sensor Array for Electrical Capacitance Tomography With High Voltage Excitation[J]. Journal of Beijing University of Technology, 2014, 40(7): 974-979.

Citation:

LU: De-cai, WANG Yan, SHAO Fu-qun. Design of Sensor Array for Electrical Capacitance Tomography With High Voltage Excitation[J]. Journal of Beijing University of Technology, 2014, 40(7): 974-979.

Citation:

LU: De-cai, WANG Yan, SHAO Fu-qun. Design of Sensor Array for Electrical Capacitance Tomography With High Voltage Excitation[J]. Journal of Beijing University of Technology, 2014, 40(7): 974-979.

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Design of Sensor Array for Electrical Capacitance Tomography With High Voltage Excitation

1. School of Electric and Information Engineering,Liaoning Institute of Science and Technology, Benxi 117004, Liaoning, China;
2. College of Information Science and Technology,Northeastern University, Shenyang 110004, China

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Received Date: March 06, 2013
Available Online: January 10, 2023

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Abstract

Abstract

The excitation signal of high voltage excitation electrical capacitance tomography (ECT) is about several hundreds of peak-to-peak volts, compared with normal ECT system in which the excitation voltage is only 20 V. The high AC voltage excitation ECT system has higher resolution and sensitivity of low capacitance measurement, and this will cause some new problems in designing its sensor array. The paper discussed the impact of electrode length and span on some important evaluation objects of a sensor array, and then evaluated the special image errors (SIE) of reconstructed images of core phantom, stratified phantom and annular phantom, which were under different electrode lengths and spans.Finally, a set of parameters of electrode length and span were chosen according to the simulation results.A sensor array for testing was fabricated according to the parameters. The image reconstruction results of grain distribution show that high quality images can be reached by the sensor array, this optimal design method of ECT sensor is feasible, and the parameters are also credible.
- capacitance electrical tomography,
- sensor array,
- high AC voltage excitation

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