肌肉电导率对人体通信信号传输的影响.doc

电子测量与仪器学报 JOURNAL OF ELECTRONIC MEASUREMENT AND INSTRUMENT 第 27 卷 第 1 期 2013 年 1 月 Vol. 27 No. 1 · 21 · DOI: 10.3724/SP.J.1187.2013.00021 肌肉电导率对人体通信信号传输的影响* 曾雪芝1, 2 高跃明1, 2 潘少恒2, 3 麦炳源2, 3 韦孟宇2, 3 民1, 2 杜 (1. 福州大学物理与信息工程学院 福州 350108; 2. 福建省医疗器械和医药技术重点实验室 福州 350002; 3. 澳门大学科技学院电机及电脑工程系 澳门特别行政区 999078) 摘 要: 肌肉组织具有良好的电导率且占据人体较大体积, 研究肌肉电导率在人体通信中的作用, 有助于掌握电流耦合信号传 输特性, 提高人体建模的准确性。采用有限元法建立电流耦合信号在肢体传输的准静态场模型, 研究不同频率下肌肉电导率的 变化引起各组织层总电流密度分布的变化, 重点分析肌肉各向异性电导率对耦合电流信号传输的影响, 最后通过实验测量验证 有限元模型。结果表明, 超过 64%的电流信号流经肌肉层, 并且肌肉电导率越大流经肌肉层的电流越多; 在 1 kHz~1 MHz 范围 内, 肌肉各向异性电导率对人体信号传输有较大影响; 考虑肌肉电导率各向异性的模型更接近人体实验结果。 关键词: 肌肉电导率; 各向异性; 人体实体 中图分类号: TN919 文献标识码: A 国家标准学科分类代码: 510.50 Effects of muscle conductivity on signal transmission of intra-body communications Zeng Xuezhi1,2 Gao Yueming1,2 Pan Shaoheng2,3 Mai Bingyuan2,3 Wei Mengyu2,3 Du Min1,2 (1. College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350108, China; 2. Key Laboratory of Medi- cal Instrumentation and Pharmaceutical Technology of Fujian Province, Fuzhou 350002, China; 3. Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macao SAR999078, China) Abstract: The muscle occupies the large volume of the human body and has good electrical conductivity. The research on effect of muscle conductivity in intra-body communication can help for analyzing the transmission characteristics of cur- rent coupling signal, as well as improving the accuracy of model. The quasi-static model based on the finite element method (FEM) was established and analyzed, for current coupling signal transmission through the limb. The variation of total current density distribution resulted from the muscle conductivity at different frequency was studied. Then the effects of muscle anisotropic conductivity were emphatically analyzed. Finally, the FEM model was verified by experimental measurements. The results showed that more than 64% of the current signal transmitted through t