网格型煤矿监测无线传感器网络同步技术研究

Research on Synchronous Technology of Mesh Grid Type Coal Mine Monitoring and Measuring Radio Sensor Network

为了保证网格型煤矿井下监测无线传感器网络监测数据的有效传输,针对该网络周期性"活跃/睡眠",结合时隙分配的无线信道使用策略,提出了与之相适应的同步方法。该方法采用分布式的广播方式和同步节点转换机制,通过路由器多次转发同步广播帧使得网络中全部节点都接收到该广播帧,从而调整该节点的工作状态,保证了整个网络所有节点的同步。试验结果表明,该方法减少了监测数据传输时产生的信道使用冲突,并能快速恢复节点与网络的通信,从而提高了信息传输的可靠性。

In order to ensure the effective transmission of the monitoring and measuring data in the radio sensor network in the mesh grid type underground mine, according to the periodical ＂ active or sleeping＂ of the network, in combined with the utilization strategy of the time interval distributed radio channel, the related suitable synchronous method was provided. The method with the distributed broadcast mode and the synchronous point changing mechanism, with the multi transferred router synchronous broadcast fame, could make the all points in the network received the broadcast frames. Therefore the work status of the points could be adjusted and the synchronization of all points in the network could be ensured. The test results showed that the method could reduce the channel application conflict occurred in the transmission of the monitoring and measuring data and could rapidly recover communication between the point and network, which could improve the reliability of the information transmission.