Pun S H, Gao Y M, Mak P U, Du M, Vai M I
Department of Electrical and Electronics Engineering, Faculty of Science and Technology, University of Macau, Av. Padre Tomás Pereira, Taipa, Macau.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:693-6. doi: 10.1109/IEMBS.2009.5332703.
Intra-body communication (IBC) is a new, different "wireless" communication technique based on the human tissue. This short range "wireless" communication technology provides an alternative solution to wearable sensors, home health system, telemedicine and implanted devices. The development of the IBC enables the possibilities of providing less complexity and convenient communication methodologies for these devices. By regarding human tissue as communication channel, IBC making use of the conductivities properties of human tissue to send electrical signal from transmitter to receiver. In this paper, the authors proposed a new mathematical model for galvanic coupling type IBC based on a human limb. Starting from the electromagnetic theory, the authors treat human tissue as volume conductor, which is in analogous with the bioelectric phenomena analysis. In order to explain the mechanism of galvanic coupling type technique of IBC, applying the quasi-static approximation, the governing equation can be reduced to Laplace Equation. Finally, the analytical model is evaluated with on-body measurement for testing its performance. The comparison result shows that the developed mathematical model can provide good approximation for galvanic coupling type IBC on human limb under low operating frequencies.
体内通信（IBC）是一种基于人体组织的新型、不同的“无线”通信技术。这种短距离“无线”通信技术为可穿戴传感器、家庭健康系统、远程医疗和植入式设备提供了一种替代解决方案。IBC的发展为这些设备提供了降低复杂性和便捷通信方法的可能性。通过将人体组织视为通信通道，IBC利用人体组织的电导率特性将电信号从发射器发送到接收器。在本文中，作者基于人体肢体提出了一种用于电耦合型IBC的新数学模型。从电磁理论出发，作者将人体组织视为体积导体，这与生物电现象分析类似。为了解释IBC的电耦合型技术机制，应用准静态近似，控制方程可简化为拉普拉斯方程。最后，通过人体测量对分析模型进行评估以测试其性能。比较结果表明所开发的数学模型在低工作频率下可为人体肢体上的电耦合型IBC提供良好的近似。
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