Inter-IC for Wearables (I2We): Power and Data Transfer Over Double-Sided Conductive Textile
Inter-IC for Wearables (I2We): Power and Data Transfer Over Double-Sided Conductive Textile
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DOI：
10.1109/tbcas.2018.2881219
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发表时间：
2018-08
影响因子：
5.1
通讯作者：
A. Noda;H. Shinoda
中科院分区：
文献类型：
--
作者：
A. Noda;H. Shinoda
我们提出了一种基于现有的串行通信协议--内部集成电路(I2C)的导电织物材料上的电源和数据传输网络。我们将提议的网络称为可穿戴设备的内部IC。连续的直流电源和I2C格式的数据同时传输到分布在双面导电纺织品上的微小传感器节点。该纺织品由两个相互隔离的导电侧面组成，用作单一的平面传输线。I2C数据与基于频分复用的直流电源一起传输。用I2C的时钟和数据信号对两个载波进行调制。设计了一种调制解调电路，以便可以使用现成的I2C接口传感器IC。本文的创新之处在于设计了一种特殊的无源调制滤波器，将其阻抗极点和零点定位在合适的频率上。这里的术语“无源调制”意味着传感器节点不会自己产生载波；相反，它们只反映外部提供的用于调制的职业。该方案能够灵活地实现可穿戴传感器系统，其中多个现成的微型传感器分布在整个系统中。
We propose a power and data transfer network on a conductive fabric material based on an existing serial communication protocol, Inter-Integrated Circuit (I2C). We call the proposed network inter-IC for wearables. Continuous dc power and I2C-formatted data are simultaneously transferred to tiny sensor nodes distributed on a double-sided conductive textile. The textile comprises two conductive sides, isolated from each other, and is used as a single planar transmission line. I2C data are transferred along with dc power supply based on frequency division multiplexing. Two carriers are modulated with the clock and the data signals of I2C. A modulation and demodulation circuit is designed such that off-the-shelf I2C-interfaced sensor ICs can be used. The novelty of this paper is that a special filter to enable passive modulation is designed by locating its impedance poles and zeros at the appropriate frequencies. The term “passive modulation” herein implies that the sensor nodes do not generate carrier waves by themselves; instead, they reflect only the externally supplied careers for modulation. The proposed scheme enables the flexible implementation of wearable sensor systems in which multiple off-the-shelf tiny sensors are distributed throughout the system.