Synchronized sensing for structural health monitoring using smart sensors
Smart sensors densely distributed over structures can provide rich information for structural health monitoring(SHM)using their computational and wireless communication capabilities.Though smart sensor technology has seen substantial advances recently,the implementation of smart sensors on full-scale structures has been limited.One challenge lies in obtaining synchronized measurement data,i.e.,each smart sensor needs to sample at the same rate and start at the same time.While users often postulate that wired sensing systems meet such sampling requirements,off-the-shelf wireless systems are unlikely to satisfy these requirements.Additionally,imperfect sampling can severely degrade data from smart sensor networks.However,high-quality data is important for effective SHM,which seeks to identify and locate damage from what are often subtle differences in measured structural responses.Obtaining synchronized sensor data from networks of smart sensors is addressed herein.Instead of precisely controlling the sampling and timing,measured signals are resampled based on time stamps appended to the signals.This resampling approach has been implemented and experimentally verified on the Imote2 smart sensor platform.
smart sensor structural health monitoring synchronization Intel Imote2 sensing
T. Nagayama B.F. Spencer, Jr. Y. Fujino
University of Tokyo,Tokyo,Japan University of Illinois at Urbana-Champaign,Urbana,IL,USA
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）