摘要针对无线传感器网络（WSN）在实现机械振动同步采集过程中，采集节点应该同时触发采集命令，同步触发误差应在一个采样周期内的要求，设计了一种基于信标时序补偿思想的WSN同步触发协议STBTC_P（the Synchronization Trigger protocol based on Beacon Timing Compensation）。协议基于IEEE 802.15.4协议标准开发多跳树状网络，以信标负载方式传输采集命令，在利用集中关联信标分配法避免信标冲突并实现全网时钟同步后，采用基于信标时序补偿思想的同步触发方法实现机械振动采集命令的多跳同步触发，为最终提高机械振动同步采集精度创造使能条件。最后，在自研采集节点WSN-G2上运行STBTC_P协议，并验证了其有效性。
To address the requirement that the sample commands of all the nodes should be triggered synchronously and the synchronization error be less than one sampling period in the course of mechanical vibration synchronous acquisition using Wireless Sensor Net, a WSN Synchronization Trigger protocol based on Beacon Timing Compensation (STBTC_P) is designed. The protocol is developed based on IEEE 802.15.4 Standard, it transmissions acquisition commands with beacon. STBTC_P establishes a good foundation for synchronization acquisition by effectively avoiding the beacon conflict using the centralized associated beacons allocation method first and then achieving trigger synchronous using the beacon timing compensation method for a multi-hop network. Finally, STBTC_P is run on the self-designed acquisition node WSN-G2 and verified its effectiveness.
2014, Vol. 33 
