摘要
现有的无线传感器网络时间同步算法的同步精度较低,无法满足分布式结构损伤检测系统的要求。文章提出一种基于最小化序列能量差的时间同步算法。该算法通过比较传感器节点在不同时刻记录的采样信号序列,采用比较能量差的方法进行时间序列自同步。经过理论分析及多次实验证明,采用该方法的同步精确度符合无线结构健康监测系统对时间同步精度要求。
A novel time series synchronization algorithm for high sensing-speed wireless damage detection system is proposed to improve the synchronization precision compared to traditional wireless synchronization methods. This paper supplies a new synchronization algorithm which compares the energy difference between post-damage waveform and pre-damage waveform received by each sensor node in structural damage detection models to use time series auto-align method to make two waves synchronous. It is shown theoretically and experimentally that the time series synchronization algorithm introduced is able to acquire satisfactory accuracy for the application of wireless damage detection system.
出处
《传感技术学报》
CAS
CSCD
北大核心
2006年第4期1296-1300,共5页
Chinese Journal of Sensors and Actuators
