煤矿工作面无线信号耦合规律分析

Analysis of wireless signal coupling law on coal face

针对煤矿工作面无线传感器网络传输问题,根据工作面无线通信空间特征,将工作面划分为2个通信空间。采用射线跟踪法分析了液压支架对工作面无线传感器网络节点通信的影响,针对无线信号源定义了工作面信号传输的近区、过渡区和远区,并通过分区数值计算,得出了只有在无线信号源的近区才存在2个通信空间信号耦合的规律。基于工作面2个通信空间的无线信号耦合规律,制定了适用于工作面环境的无线传感器网络节点部署策略,并采用NS2软件进行了仿真分析。仿真结果表明,该工作面无线传感器网络节点部署策略具有较长的网络生存期和较好的数据收发效果。

For the problem of wireless sensor network（WSN）transmission on coal face,communication space of coal face was divided into two spaces according to its wireless communication characteristics.Influence of hydraulic supports on WSN node communication of coal face was analyzed by use of ray tracing method,and three signal transmission areas on coal face were defined for wireless signal source,which were near area,transitional area and far area.Numerical calculation of each signal transmission area was taken out,and a law was gotten that signal coupling of two communication spaces was only in the near area of wireless signal source.A strategy of WSN node distribution on coal face was proposed according to the law,which was simulated in NS2 soft.The simulation results show that the strategy has long network lifetime and good effect of date receiving and sending.