三维电容层析成像组合电极激励测量模式

针对3层电容阵列电极传感器,基于三维仿真,研究了两种组合电极激励测量模式,并与传统的单电极激励单电极测量模式进行了比较,包括电容测量值大小及其动态范围、敏感场分布均匀性以及重建图像质量。基于COMSOL软件及Matlab软件进行了仿真实验,结果表明:相较于传统的单电极激励单电极测量模式,组合电极激励测量模式所得图像重建效果更好,测量电容值较大且动态范围较小,敏感场分布更加均匀,对中心物体的成像质量明显提高。

Three-dimensional Combined-electrode Exciting-measuring Mode for Electrical Capacitance Tomography

For the three-layer capacitance array sensor, two kinds of combined-electrode exciting-measuring mode are studied based on three-dimensional simulation. The values and the dynamic range of measured capacitance data, the uniformity of sensitivity distribution and the reconstructed images of different flow regimes are compared with conventional single-electrode exciting-measuring mode. Simulation experiments are carried out using COMSOL and Matlab software. The simulation results show that the measured capacitance values are larger and its dynamic range is smaller for the presented combined-electrode exciting-measuring mode. Meanwhile, the sensitivity distribution is more uniform and the quality of reconstructed images is improved obviously.