基于磁感应的跨介质通信技术研究

Research on Underwater Wireless Cross-media Communication Technology Based on Magnetic Induction

摘要:

随着海洋军事与战略的发展，传统声学难以完成空水跨介质通信需求。磁感应通信技术由于在空水介质中磁导率一致，且具有信道稳定、速度快、体积灵活、成本低的优势，可以作为空水跨介质的技术补充。本文以磁偶极子为基础，对空水跨介质感应磁场传播模型进行了研究，证明磁场在空水界面的传播连续性，之后基于USRP设计通信收发电路并实现一套磁感应通信系统。该系统在收发线圈半径10cm，发射功率1mW情况下，实现空水（湖水）跨介质20m，通信速率10kbps的无误码文本传输，证实了磁感应通信在空水跨介质场景下的可行性，对后续的相关研究具有一定的指导意义。

Abstract:

With the development of Marine military and strategy, it is difficult for traditional acoustics to meet the requirements of air-water cross-media communication. Magnetic induction communication technology can be used as a technical supplement for air-water transmedia because of its advantages of consistent permeability, stable channel, fast speed, flexible volume and low cost in air-water medium. In this paper, based on magnetic dipole, the magnetic field propagation model of air water across media is studied to prove the continuity of magnetic field propagation at the air water interface. After that, a communication transceiver circuit is designed based on USRP and a magnetic induction communication system is realized. Under the condition of 10cm radius of transmitting coil and 1mW transmitting power, the system realizes error-free text transmission of air water (lake) 20m across medium and 10kbps communication rate, which proves the feasibility of magnetic induction communication in air water across medium and has certain guiding significance for subsequent related research.