| 提高开放式电阻抗成像检测深度的方法研究 |
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| 引用本文： | 何传红,何为,张莉,张占龙.提高开放式电阻抗成像检测深度的方法研究[J].系统仿真学报,2011,23(9):1990-1994. |
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| 作者姓名： | 何传红 何为 张莉 张占龙 |
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| 作者单位： | 重庆大学电气工程学院输配电装备及系统安全与新技术国家重点实验室,重庆,400030 |
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| 基金项目： | 863计划(2006AA02Z4B7); 国际科技合作项目(2007DFR30080); 教育部博士点基金(20070611035) |
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| 摘 要： | 在分析影响开放式电阻抗成像检测深度的关键因素和解决途径的基础上,针对实际应用建立了人体躯干二维截面物理模型和相应的数学模型,提出了表面激励、背电极激励和手电极激励等三种激励模式,并采用有限元法进行仿真评估。仿真结果表明,背电极激励和手电极激励能使激励电流更多地分布于被测对象深部区域,相应地能使边界电压对被测对象内部阻抗具有更高的灵敏度,从而提高开放式电阻抗成像的检测深度,比表面激励模式更加适合于开放式电阻抗成像的应用。
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| 关 键 词： | 开放式电阻抗成像 检测深度 激励模式 电流密度 灵敏度 有限元法 仿真 |
Study of Detecting Depth Improvement for Open Electrical Impedance Tomography |
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| HE Chuan-hong,HE Wei,ZHANG Li,ZHANG Zhan-long.Study of Detecting Depth Improvement for Open Electrical Impedance Tomography[J].Journal of System Simulation,2011,23(9):1990-1994. |
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| Authors: | HE Chuan-hong HE Wei ZHANG Li ZHANG Zhan-long |
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| Institution: | HE Chuan-hong,HE Wei,ZHANG Li,ZHANG Zhan-long(State Key Laboratory of Power Transmission Equipment & System Security and New Technology,College of Electrical Engineering,Chongqing University,Chongqing 400030,China) |
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| Abstract: | Based on the analysis of critical factors and solutions of the detecting depth of open electrical impedance tomography(EIT),two-dimensional physical models and corresponding mathematical models for the human torso aiming at practical application were set up,and three excitation patterns,namely surface excitation(SE),back excitation(BE) and hand excitation(HE) were proposed.The validity of these presented excitation patterns was proved by simulation with finite element method(FEM).The simulation results indi... |
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| Keywords: | open EIT detecting depth excitation pattern current density sensitivity FEM simulation |
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