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《Acta Metrologica Sinica》 2007-03
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Digitalized Electrical Capacitance Tomography System

MA Min~(1,2),WANG Hua-xiang~(1),ZHANG Wei-yu~(2)(1.School of Electrical Engineering & Automation,Tianjin University,Tianjin 300072,China;2.Energy Research Institute,Henan Academy of Science,Zhengzhou,Henan 450008,China)  
Based on the basic principle of electrical capacitance sensing,a digitalized electrical capacitance tomography(ECT) system is designed.The effect of the structure parameters of array electrode on the symmetrical sensitivity distribution is also analyzed by finite element method.Through optimum design and simulation experiment,the homogeneity of the sensing field distribution is improved.A 12-electrode digital ECT system including core of digital signal processor(DSP) and the field program mable gate array(FPGA) devices is developed.Meanwhile,a new reconstruction algorithm,which divides the process of reconstruction into two steps,i.e.pre-iteration method off-line and one step image on-line is presented.It can improve both the high data acquisition speed and the high image resolution.
【CateGory Index】: TP274.5
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【Co-references】
Chinese Journal Full-text Database 10 Hits
1 SUN Nan,HUANG Min,QI Zhi-sheng(Department of Mechanical Engineering,Beijing Institute of Machinery,Beijing 100085,China);Application of the capacitance circuit for electrical capacitance tomography system[J];Journal of Beijing Institute of Machinery;2006-02
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