电容层析成像系统动态成像稳定性补偿方法

Compensation Method for Electrical Capacitance Tomography System Dynamic Imaging Stability

分析了影响基于交流型电容 /电压转换电路的电容层析成像系统动态成像的稳定性的原因是由于极板阵列控制电路的CMOS开关耦合电容的存在。为此 ,给出了两种解决方法 :一是改变极板阵列控制电路模拟开关的安排 ;二是不改变原有电路 ,采用软件实时补偿。实验结果表明 ,两方法中采用后者更实用更经济。

The CMOS switch coupling capacitance effect on the dynamic imaging stability of AC-based C/V circuit ECT system. Two solutions are introduced in the paper: The first is to change the CMOS arrangement in the electrode control circuit, the second is to use the soft-compensation without changing the circuit. The experiment results show the second method is more practical and economical.