准静电动物体通信用于慢性无栓系啮齿动物生物电位记录
Electro-Quasistatic Animal Body Communication for Chronic Untethered Rodent Biopotential Recording
摘要：
对生物电位信号的连续多通道监测对于了解整个身体至关重要，有助于神经研究中的准确模型和预测。无线技术中用于无束缚生物电势记录的当前技术状态依赖于辐射电磁（EM）场。在这种传输中，由于EM场被广泛辐射，导致有损的低效系统，因此仅接收到该能量的一小部分。使用身体作为通信介质（类似于“电线”）允许将能量容纳在身体内，产生比辐射EM通信低的数量级的损耗。在这项工作中，我们介绍了动物身体通信（ABC），它利用的概念，使用身体作为一种媒介到域的慢性动物生物电位记录。本研究首次建立了动物体通讯线路和通道损失的理论和模型。使用这个理论模型，一个亚英寸$^3$，定制设计的传感器节点是建立使用现成的组件，能够感测和传输生物电位信号，通过大鼠的身体在显着较低的功率相比，传统的无线传输。体内实验分析证明，与传统的无线通信模式相比，ABC成功地将采集的心电图（EKG）信号传输到身体，相关准确度>99%，功耗降低了50倍。
英文摘要：
Continuous multi-channel monitoring of biopotential signals is vital in understanding the body as a whole, facilitating accurate models and predictions in neural research. The current state of the art in wireless technologies for untethered biopotential recordings rely on radiative electromagnetic (EM) fields. In such transmissions, only a small fraction of this energy is received since the EM fields are widely radiated resulting in lossy inefficient systems. Using the body as a communication medium (similar to a 'wire') allows for the containment of the energy within the body, yielding order(s) of magnitude lower loss than radiative EM communication. In this work, we introduce Animal Body Communication (ABC), which utilizes the concept of using the body as a medium into the domain of chronic animal biopotential recording. This work, for the first time, develops the theory and models for animal body communication circuitry and channel loss. Using this theoretical model, a sub-inch$^3$, custom-designed sensor node is built using off the shelf components which is capable of sensing and transmitting biopotential signals, through the body of the rat at significantly lower powers compared to traditional wireless transmissions. In-vivo experimental analysis proves that ABC successfully transmits acquired electrocardiogram (EKG) signals through the body with correlation accuracy >99% when compared to traditional wireless communication modalities, with a 50x reduction in power consumption.
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