非闭合电极电容层析成像传感器的敏感场计算及仿真成像研究  

Research on unclosed electrode sensor applied in electrical capacitance tomography

作　　者：刘靖[1] 刘石[1] 姜凡[1] 雷兢[1] 李志宏[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《仪器仪表学报》2007年第9期1564-1568,共5页Chinese Journal of Scientific Instrument

基　　金：国家自然基金面上项目(40501017);国家自然基金重点基金(60532020)资助项目

摘　　要：本义提出了一种新型的非闭合电极电容传感器,以满足利用电容层析成像技术来测试冻土中水分迁移、物质组成及其动态变化特性的要求,对该电容传感器的敏感场进行了计算,并对其进行了成像仿真研究。结果表明,该种电容传感器可以实现测试区域内不同形状物体的测量及图像重建,其中Landweber成像算法对该传感器成像质量最好,从而为利用电容层析成像技术来进行冻土测试提供了实验基础。A novel unclosed electrodes sensor is presented to measure water motion, matter composition and dynamic variation in frozen soil using electrical capacitance tomography （ECT）. The sensitivity map of the sensor was calculated and its imaging results were simulated. The results indicate that the sensor can be used to measure different shaped objects and reconstruct the image. Among the listed image reconstruction algorithms, Landweber method can give the best image reconstruction effect, which will provide instructive information for the further study on the application of ECT in frozen soil.

关 键 词：电容层析成像 冻土 非闭合电极电容传感器 敏感场 图像重建 

分 类 号：TM934.2[电气工程—电力电子与电力传动]