摘要
通过分析多节点时间同步误差对机械振动监测的影响,得出机械振动监测中无线传感器网络时间同步方法应具有微秒级精度、低功耗以及多跳同步的特点。提出了一种低功耗的多跳时间同步方法,在已有单跳同步方法的基础上,使用基于贪婪启发式的算法来选取多跳同步方法中的参考节点对,从而将该单跳同步方法扩展到多跳同步。仿真与实验表明,所提方法与经典同步方法RBS具有相同的同步精度,并且大幅降低了同步能耗,可以满足机械振动监测的要求。
By analyzing the effects of the multi-node time synchronization errors on mechanical vibration monitoring,it is indicated that the characteristics of time synchronization on mechanical vibration monitoring must be microsecond-level accuracy,low overhead and multi-hop synchronization.A low overhead multi-hop time synchronization approach was proposed herein.a known single hop synchronization approach was extended to multi-hop synchronization by employing a greedy heuristic algorithm to select reference nodes.The simulation and experimental results reveal that the proposed approach has the same synchronization accuracy as the well-known schemes reference broadcast synchronization and significantly reduces the energy consumption,which show that the proposed approach has a better performance for the mechanical vibration monitoring application.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2010年第10期1190-1194,共5页
China Mechanical Engineering
基金
国家自然科学基金资助项目(50875272)
国家863高技术研究发展计划资助项目(2009AA04Z411)
霍英东教育基金会11届青年教师基金资助项目(111057)
重庆大学"211工程"三期建设研究生开放实验室支持项目(S-09106)
关键词
无线传感器网络
机械振动监测
时间同步
低功耗
多跳同步
wireless sensor network
mechanical vibration monitoring
time synchronization
low overhead
multi-hop synchronization
