信标模式下磁感应透地通信传输距离分析模型

Analytical model of transmission distance for magnetic induction through-the-earth communication under the beacon mode

提出了一种具有信标模式的磁感应透地通信工作方式.基于毕奥-萨伐尔定律,建立了信标模式下磁感应透地通信发射机天线线圈主要参数、接收机传感器灵敏度以及地层磁导率对透地传输距离影响的分析模型,得到了模型中的参数与透地传输距离的近似关系,引入了地磁噪声因素,使计算结果更接近实际情况.分析与仿真结果表明:信标模式下的磁感应透地通信工作方式可克服传统电磁波透地通信方式受地层介质影响大等问题,具有透地传输距离远与性能稳定等突出优点.在可行的参数配置和信标模式下,磁感应透地通信工作方式可穿透地层1 000m以上,满足抢险救援对透地通信的需求.

A magnetic induction through-the-earth communication method with beacon mode was proposed.Based on the law of Biot Savart,the analytical model of how the main parameters of transmitter antenna coil,transducer sensitivity of receiver and stratum magnetic conductivity affect through-the-earth transmission distance in the beacon mode was set up.The approximate relation between the parameters of model and through-the-earth transmission distance was obtained.Geomagnetic noise was introduced into the model,which makes the results closer to the actual situation.The analysis and simulation results show that the beacon mode of magnetic induction through-the-earth communication mode has the advantages of stable transmission which can solve the problems such as the large influence of stratum medium on through-the-earth transmission distance.Under the feasible parameter configuration,the magnetic induction through-the-earth communication method in the beacon mode can penetrate more than 1 000 meters of the stratum,which meets the needs of post-accident rescues of underground mine for through-the-earth communication.