Human Body Communication Based on Magnetic Coupling
Human Body Communication Based on Magnetic Coupling
复制标题
基于磁耦合的人体通信
DOI：
10.1109/tap.2013.2292705
复制
发表时间：
2014
影响因子：
5.7
通讯作者：
H. Morimura
中科院分区：
文献类型：
--
作者：
T. Ogasawara;A. Sasaki;K. Fujii;H. Morimura
提出了一种利用磁力耦合进行人体通信的方法。由于人体作为产生磁耦合的环路的一个组件，只有当人关闭环路时才会发生强耦合。因此，人的自然身体运动形成了一种交流渠道。在这里，验证了渠道形成的机制和对周围环境的稳健性。首先，通过对频率高达20 MHz的信道传递函数(信道损耗)的测量，验证了电路模型的有效性。其次，论证了渠道形成机制的有效性。与开环相比，在10 MHz以下的频率下，闭合可使传递函数提高30d B以上。这种强烈的通道形成验证了其形成机制。最后，为了研究附近金属物体对传递函数的影响，将金属物体放置在实验装置上或附近，但没有观察到传递函数显著退化。这证明了它对周围环境的稳健性。这些结果表明，作为通信通道的一部分，通过与人体的磁耦合进行通信是可能的。
This paper presents a method of human body communication that employs magnetic coupling. Since a human body acts as one component of a loop for creating the magnetic coupling, strong coupling occurs only when a person closes the loop. Thus, a person's natural bodily movement forms a communication channel. Here, the validation of the mechanism of channel formation and the robustness against surrounding environment were presented. First, the validity of the circuit model was demonstrated through measurement of the transfer function of the channel (channel loss) at frequencies up to 20 MHz. Second, the validity of the mechanism of channel formation was demonstrated. Comparing to opening the loop, closing was found to increase the transfer function by more than 30 dB at frequencies below 10 MHz. This strong channel formation verifies its mechanism. Finally, to investigate the influence of a nearby metal object on the transfer function, a metal object was placed on or near the experimental setup; but no significant degradation of the transfer function was observed. This demonstrates robustness against surrounding environment. These results suggest the possibility of communication by magnetic coupling with a human body as part of the communication channel.