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。
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.
[1] Yang W Q. Design of electrical capacitance tomography sensors[J]. Measurement Science and Technology, 2010, 21(4):042001.
[2] Sun J T, Yang W Q. A dual-modality electrical tomography sensor for measurement of gas-oil-water stratified flows[J]. Measurement, 2015, 66(1):150-160.
[3] 孙猛,刘石,雷兢,等. 利用电容层析成像法测量气力输送中的煤粉流量[J]. 动力工程, 2008, 28(3):411-414.
[4] Wang X X, Hu H L, Liu X, et al. Concentration measurement of dilute pulverized fuel flow by electrical capacitance tomography[J]. Instrumentation Science & Technology, 2015,43(1):89-106.
[5] 王海刚,赵国荣,邱桂芝. 循环流化床多旋风分离器入口电容层析成像测量[J]. 工程热物理学报, 2014, 35(1):109-113.
[6] Zhang R H, Wang Q, Wang H X, et al. Data fusion in dual-mode tomography for imaging qil-gas two-phase flow[J]. Flow Measurement and Instrumentation, 2014, 37(1):1-11.
[7] Zhao T, Liu K, Murata H, et al. Experimental and numerical investigation of particle distribution behaviors in a rolling circulating fluidized Bed[J]. Powder Technology, 2014, 258(1):38-48.
[8] Andrew H. Weighing without touching:applying electrical capacitance tomography to mass flowrate measurement in multiphase flows[J]. Measurement & Control, 2014, 47(1):19-25.
[9] Eso A A, Zhao Y B, Yeung H. Comparison of electrical capacitance tomography & gamma densitometer measurement in viscous oil-gas flows[C]//8th International Symposium on Measurement Techniques for Multiphase Flows. Guangzhou, China:AIP Conf Proc. 2014:81-89.
[10] Ye J M, Ge R H, Qiu G Z, et al. Measurement strategy for rectangular electrical capacitance tomography sensor[C]//8th International Symposium on Measurement Techniques for Multiphase Flows. Guangzhou, China:AIP Conf Proc. 2014:37-42.
[11] Yang W Q, Peng L H. Image reconstruction algorithms for electrical capacitance tomography[J]. Measurement Science and Technology, 2003, 14(1):R1-R13.
[12] Ye J M, Wang H G, Yang W Q. A sparsity reconstruction algorithm for electrical capacitance tomography based on modified landweber iteration[J]. Measurement Science and Technology, 2014, 25(11):115402.
[13] Liu S, Fu L, Yang W Q. Optimization of an iterative image reconstruction algorithm for electrical capacitance tomography[J]. Measurement Science and Technology, 1999, 10(7):37-39.
