电学层析成像的灵敏度系数更新算法  

Updating Algorithm for Sensitivity Coefficient of Electrical Tomography

作　　者：岳士弘 张洋洋 赵愉 王化祥 

机构地区：[1]天津大学电气自动化与信息工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2017年第12期1227-1234,共8页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(61573251)~~

摘　　要：针对电学层析成像技术受被测物场"软场效应"和欠定问题的影响而造城空间分辨率较低且稳定性差的问题,分析了电学层析成像过程中的灵敏度系数之和对于空间分辨率的关键影响,据此提出一种基于灵敏度系数更新及伪迹辨识的电学层析成像算法.结果表明,该方法能够有效地克服电学层析成像技术的固有问题,重建图像相对误差降低了5%~8%,,且对于离散分布的小目标空间分辨率更高.The low spatial resolution and poor stability of electrical tomography are caused by the soft field effect and undetermined problem of the measured object field.In order to overcome the effect of soft field,the key influence of sum of the sensitivity coefficients on the spatial resolution is analyzed in electrical tomography.A novel electrical tomography algorithm based on sensitivity coefficient is proposed.The experimental results show that the method can effectively overcome the inherent problem of electrical tomography.It reduces the error of reconstructed image by 5%—8%,,and improves the resolution of small target space for discrete distributions.

关 键 词：电学层析成像 软场效应 灵敏度系数 图像重建 

分 类 号：TK448.21[动力工程及工程热物理—动力机械及工程]