Design of Conductive Coupler for Underwater Wireless Power and Data Transfer
Design of Conductive Coupler for Underwater Wireless Power and Data Transfer
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DOI：
10.1109/tmtt.2020.3041245
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发表时间：
2021-01-01
影响因子：
4.3
通讯作者：
Matsumoto, Marimo
中科院分区：
文献类型：
--
作者：
Tamura, Masaya;Murai, Kousuke;Matsumoto, Marimo
在海水下实现电容耦合是困难的，尽管电容耦合器作为无线电力和数据传输的有前途的解决方案而引起关注。由平行板电极（例如，电容耦合器）由于海水的高导电性而具有强导电耦合。本研究介绍了一种高效耦合器的设计，利用这种现象作为一种新的方法。首先，通过将高效导电耦合器与传统导电耦合器进行比较来阐明高效导电耦合器的工作原理。结果揭示了高效设计的关键因素。导出了最大有效效率时的设计参数。然后制造所设计的耦合器。实验表明，在20 mm的传输距离和1 kW的传输功率下，海水中的效率可达90%以上。演示还显示，电力通过耦合器无线传输到相机模块，相机记录的传输数据出现在笔记本电脑上。
Realizing capacitive coupling under seawater is difficult, although the capacitive coupler attracts attention as a promising solution for wireless power and data transfer. The coupler consisting of parallel-plate electrodes (e.g., capacitive coupler) has strong conductive coupling because of the high conductivity of seawater. This study introduces the design of a highly efficient coupler utilizing this phenomenon as a novel method. First, the operational principle of the highly efficient conductive coupler is clarified by comparing it to a conventional conductive coupler. The results reveal the key factor for the high-efficiency design. The design parameters at the maximum available efficiency are derived. The designed coupler is then fabricated. A demonstration shows that the efficiency of over 90% under seawater is achieved at a 20-mm transfer distance and a 1-kW transfer power. The demonstration also shows that power is wirelessly transferred to a camera module via the coupler, with the transferred data recorded by the camera appearing on a laptop computer.