The optimization for sensor structure of capacitively coupled electrical resistance tomography ( CCERT) is presented. The model of the 12-electrode sensor of CCERT has been established by finite element simulation software firstly, and sensitivity field has been calculated for the reconstruction of image. Then the finite element model is verified by comparing the simulation data and reconstructed image with that of experiment respectively. The result shows that the model is reasonable. The effect on the measurement data is studied by simulation for two different models of sensor. Finally, the optimum size of the screen of CCERT sensor is proposed with the minimum influence on the measurements based on the final sensor model discussed previously. The study can provide useful instruction for the design of CCERT sensor.%针对电容耦合电阻层析成像传感器的优化设计,首先利用有限元仿真软件建立了12电极传感器有限元模型,并分析了后续图像重建所需的传感器灵敏场,之后将该仿真模型与实际传感器相应的测量数据及重建图像进行对比验证,研究表明仿真与实验结果能够较好吻合,为对传感器性能进一步研究提供可靠基础.为了提高系统稳定性及抗干扰能力,以该原始模型为基准,分别对两种不同结构的传感器模型进行仿真分析,并研究其对系统测量值的影响.最后,在选定了传感器的基本模型的基础上,基于对传感器性能影响最小的角度进行分析,对该传感器尺寸进行优化.本研究为系统设计提供重要依据.
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