一种基于三轴正交接收线圈的磁感应透地通信方案OA北大核心CSTPCD
A magnetic induction through-the-earth communication scheme based on three-axis orthogonal receiving coil
为提高磁感应透地通信系统的灵活性和覆盖范围,提出了一种新型透地通信方案,该方案采用单轴空气线圈作为地面发射机天线,用3个相同参数的空气线圈作为接收机天线.首先,对通信信号进行空间分集接收,使通信系统的井下接收机能够以任意姿态地摆放于巷道之中,并能实现更广范围的信号覆盖;其次,为消除因接收线圈间近场耦合作用而产生的信号干扰,将接收机3个天线设置成共用1个圆心且两两相互正交的空间结构;最后,以远距离通信场景下收发线圈间的弱耦合情况为依据,建立一套与接收方案相对应的等效电路模型,并搭建仿真实验平台,分析提出的方案的通信性能.研究结果表明:三轴正交磁感应透地通信接收方案的信号接收强度可达到同等通信距离下理想信号强度的57.7%以上,接收功率可达到最优接收功率的33.33%以上.本文提出的方案解决了单轴线圈接收方案中的通信盲区问题,且有效提高了远距离磁感应透地通信系统的覆盖范围和对应急救援场景的适应性.
In order to improve the flexibility and coverage of the magnetic induction through-the-earth(TTE)communication system,a new TTE communication scheme was proposed.The scheme uses a single axis air coil as the ground transmitter antenna and three air coils with the same parameters as the receiving antenna.Firstly,the communication signal was received by space diversity,so that the underground receiver of the system can be placed in the tunnel in any posture and achieve a wider range of signal coverage.Secondly,in order to eliminate the signal interference caused by the near-field coupling between the receiving coils,the three antennas of the receiver were set to a spatial structure with a common center and orthogonal to each other.Finally,based on the weak coupling between the transmitting and receiving coils in the long-distance communication scenario,a set of equivalent circuit models corresponding to the receiving scheme were established.A simulation experiment platform was built to analyze the communication performance of the proposed scheme.The results show that the signal receiving strength of the three-axis orthogonal magnetic induction TTE communication receiving scheme can reach more than 57.7%of the ideal signal strength under the same communication distance,and the receiving power can reach more than 33.33%of the optimal receiving power.The scheme proposed in this paper solves the problem of communication blind area in the single-axis coil receiving scheme,and effectively improves the coverage of the long-distance magnetic induction TTE communication system and the adaptability to emergency rescue scenarios.
王羿帆;杨维;戴蒙天
北京交通大学电子信息工程学院,北京,100044
矿山工程
透地通信磁感应远距离应急通信
through-the-earth communicationmagnetic inductionlong-distanceemergency communication
《中南大学学报(自然科学版)》 2024 (003)
973-981 / 9
国家自然科学基金资助项目(62071032)(Project(62071032)supported by the National Natural Science Foundation of China)
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