协作式磁感应通信的线圈阵列优化设计  

Optimization design of coil array for cooperative magnetic induction communication

作　　者：王一鸣 谢旭[1] WANG Yiming;XIE Xu(Department of Electronic Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电子工程学院,武汉430033

出　　处：《电波科学学报》2022年第2期304-313,共10页Chinese Journal of Radio Science

基　　金：湖北省自然科学基金面上项目(2018CFB704)。

摘　　要：磁感应通信是一种新兴的水下无线通信技术,但传统方式的磁感应通信系统路径损耗高、传输距离有限.本文针对空心圆环线圈的点对点式与协作式的磁感应通信模型进行了理论分析,并提出了协作式通信模型中线圈摆放角度的优化设计方法以最大程度地提高通信距离,同时针对实际水下应用环境提出一种校正机制以动态消除水流影响.研究结果表明:对于一般协作式,当间隔角度|θ|≥38.53°时,发射线圈T_(2)对接收线圈R_(1)磁通量的增加低于20%;改进T_(2)、R_(1)的摆放角度可以提高接收机处磁通量相对增长率,最大可比一般协作式分别高出20.30%、12.66%,且改进T_(2)摆放角度的方法对提高整体通信能力更有效;当接收机最小灵敏度为0.1 nT时,在相同发射功率下,改进T_(2)摆放角度的协作式磁感应通信(线圈间隔100m)的传输距离比点对点式高出9.96%.Magnetic induction communication is an emerging underwater wireless communication technology,but the traditional magnetic induction communication system has high path loss and limited transmission distance.In this paper,the point-to-point and cooperative magnetic induction communication models of the coreless circular coil are analyzed theoretically,and the optimal design methods of the coil placement angle in the cooperative communication model is proposed,so as to maximize the communication distance.At the same time,a correction mechanism is proposed to dynamically eliminate the influence of water flow under the actual underwater application environment.The research results show that for the general cooperative mode,when the interval angle is greater than 38.53°,the increase of magnetic flux of transmitting coil T_(2) to receiving coil R_(1) is less than 20%;the relative growth rate of magnetic flux at the receiver can be increased by changing the placement angle of T_(2) and R_(1),and can be increased by 20.3%and 12.66%respectively compared with the general cooperative mode at most,and the method of changing the placement angle of T_(2) is more effective to improve the whole communication ability;when the minimum sensitivity of the receiver is 0.1 nT,the transmission distance of the cooperative magnetic induction communication with changing the placement angle of T_(2)(coil spacing is 100 m)can be increased by 9.96%compared with the point-to-point mode under the same transmitting power.

关 键 词：磁感应通信 协作式 线圈间隔 摆放角度 磁通量 磁感应强度 

分 类 号：TN929.3[电子电信—通信与信息系统]