Characterization of a multi-plane electrical capacitance tomography sensor with different numbers of electrodes

Characterization of a multi-plane electrical capacitance tomography sensor with different numbers of electrodes
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具有不同电极数量的多平面电容断层扫描传感器的表征

DOI:
10.1088/0957-0233/27/3/035103
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发表时间:
2016-02
影响因子:
2.4
通讯作者:
Yang Wuqiang
Yang Wuqiang
中科院分区:
工程技术3区
文献类型:
--
作者:
Ye Jiamin;Wang Haigang;Yang Wuqiang

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多平面电容层析成像(ECT)传感器要获得满意的电容数据和良好的图像质量,电极数量的选择至关重要。本文讨论了三平面电激传感器中电极数目的问题。三个传感器在每个平面上的电极数量分别为4、8和12。定义了分辨率矩阵的三个质量度量,即振幅响应、相对位置误差和空间分辨率,并用于评估ECT传感器的初步性能。在数值模拟的基础上,利用线性反投影(LBP)和Landweber迭代算法对三种传感器获得的无噪声和有噪声电容数据进行图像重建。通过图像误差和相关系数对图像质量进行定量评价。在静态实验的基础上,分析了电极个数对电容数据和重构图像质量的影响。根据数值模拟和实验结果,对不同条件下电极数量的选择提出了建议。
Choosing the number of electrodes is crucial for a multi-plane electrical capacitance tomography (ECT) sensor to obtain satisfactory capacitance data and good image quality. In this paper, issues with the number of electrodes in three-plane ECT sensors are discussed. The number of electrodes on each plane for the three sensors is 4, 8, and 12, respectively. Three quality measures of resolution matrix, i.e. the amplitude response, relative position error, and spatial resolution, are defined and used for evaluating the preliminary performance of ECT sensors. Based on numerical simulation, the noise-free and noisy capacitance data obtained from the three sensors are used for image reconstruction by linear back projection (LBP) and Landweber iteration algorithms. The image quality is evaluated quantitatively in terms of image error and correlation coefficient. Based on static experiment, the effect of the number of electrodes on the quality of the capacitance data and reconstructed images is also analyzed. According to the numerical simulation and experiment results, the selection of the number of electrodes under different conditions is suggested.
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