单目标电阻抗成像的定性分析  

Qualitative analysis of single target electrical resistance tomography

作　　者：惠小强[1] 王楠[2] 

机构地区：[1]西安邮电大学研究生院,陕西西安710121 [2]西安邮电大学理学院,陕西西安710121

出　　处：《西安邮电大学学报》2017年第2期65-68,80,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金资助项目(11275099;11475135)

摘　　要：针对电阻抗成像目标信息的获取问题,建立一个定性的成像模型。以COMSOL Multiphysics 4.3a为工具,将16个电极均匀分布在内含目标小圆的大圆盘周围,两个相邻电极作为电流输入和输出端,其余电极用于测边界各点电势值,分析边界电势与目标小圆圆心的位置及半径之间的对应规律,给出定性分析单目标电阻抗成像的程序流程图。实验结果表明,通过边界各点电势信息可以快速推测目标信息,该模型对探测圆盘中目标的有无非常有效。A closed experimental system based on COMSOL Multiphysics is designed for finding an easy way to obtain the targets information and building a qualitative imaging model in electrical resistance tomography （EIT）. In this system, a ring of 16 electrodes is placed uniformly around a big thin disc with one small target hole, two nearest electrodes are used to input and output current, and the rest electrodes are used to measure the boundary voltage. Experimental results demonstrate that the hole＇s position and radius have unique and clear relations with the boundary voltage. According to boundary voltage information one could infer the targets information quickly. This method is also effective to judge yes-or-no cases of the target.

关 键 词：单目标定位 电阻抗成像 COMSOL MULTIPHYSICS 

分 类 号：O441[理学—电磁学] TN27[理学—物理]