【摘要】 三维电容层析成像(3D ECT)一般基于单电极测量模式。构建一个3层ECT传感器,研究多电极激励测量模式在3D ECT中的稳定性,包括单电极激励、同层相邻双电极激励和不同层双电极激励。利用Landweber迭代算法重建图像,以相关系数作为图像质量评价标准,研究在不同数据噪声水平下,激励测量方式对重建图像的质量和稳定性的影响。根据数据模拟结果,对3种激励测量模式的稳定性进行评价。更多还原

【Abstract】 Generally, single-electrode excitation strategy is used for a 3D ECT( electrical capacitance tomography). In this study,the stability of multi-electrode excitation strategies is investigated by using a three-plane ECT sensor for the 3D image reconstruction. Three excitation strategies,including the single-electrode excitation,dual-electrode excitation in the same plane,and dual-electrode excitation in different planes,are considered for comparison. Landweber iteration algorithm is used for image reconstruction. The effect of excitation strategy on image quality and stability is investigated by using the noise-free and noisy data in terms of correlation coefficient.Based on the simulation results,the stability of the three excitation strategies is evaluated.更多还原