Dynamic imaging in electrical capacitance tomography and electromagnetic induction tomography using a Kalman filter
Dynamic imaging in electrical capacitance tomography and electromagnetic induction tomography using a Kalman filter
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DOI：
10.1088/0957-0233/18/11/004
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发表时间：
2007-11-01
影响因子：
2.4
通讯作者：
Ma, Xiandong
中科院分区：
文献类型：
--
作者：
Soleimani, Manuchehr;Vauhkonen, Marko;Ma, Xiandong
电容层析成像（ECT）和电磁感应层析成像（EMT）试图通过测量物体周围的电容和电磁感应来可视化具有不同介电常数和电导率/磁导率的材料的分布，旨在揭示物体的电和磁特性。在ECT中，测量围绕外围放置的电极对的电容，并且在EMT中，测量线圈对的互感。本文提出了一种基于线性卡尔曼滤波的ECT和EMT动态成像技术，以提高图像的时间分辨率。反问题被视为一个状态估计。卡尔曼估计器用于获得材料分布。实验结果表明，动态成像技术可以提高ECT和EMT的时空分辨率。
Electrical capacitance tomography (ECT) and electromagnetic induction tomography (EMT) attempt to visualize the distributions of materials with different permittivity and conductivity/permeability, aiming to reveal electrical and magnetic characteristics of an object, by measuring electrical capacitance and electromagnetic inductance on the periphery of the object. In ECT, capacitances of pairs of electrodes placed around the periphery are measured and in EMT, mutual induction of pairs of coils is measured. In this paper, a dynamic imaging technique is developed for ECT and EMT with a linearized Kalman filter to improve the temporal resolution of images. The inverse problem is treated as a state estimate. A Kalman estimator is used to obtain the material distribution. Experimental results demonstrate that the dynamic imaging technique can improve the spatio-temporal resolution of both ECT and EMT.