Wireless SensorNetworks and Multifunctional Carbon Nanotube Fibers for Structural Health Monitoring Dr. F. G. Yuan Department of Mechanical and Aerospace Engineering North CarolinaStateUniversity Raleigh,NC27695 结构健康监测中的无线传感网络和多功能碳纳米管光纤 机械和航空航天工程学院 教授 美国北卡罗来纳州立大学 ABSTRACT Nearly all in-service structures such as buildings, bridges, aircraft, ships, and spacecraft requires some form of maintenance for monitoring their integrity and health condition to prolong their lifespan or to prevent catastrophic failure. This promotes a highly interdisciplinary new emerging field, often called structural health monitoring.
With recent advances in embedded computing technologies and vast reduction in size and power consumption of CMOS circuitry, several prototypes of miniaturized wireless sensors have become available for SHM. However, none of these prototypes can accommodate the need of high frequency applications which is critical for active diagnostic techniques. The demand of high I/O throughput for wireless smart sensors has been brought into much attention in detecting localized structural damage. To facilitate research in wireless sensor for SHM, a novel wireless intelligent sensor platform (WISP) using FPGA as co-controller with ultrasonic sensing capability is designed, developed, and initially tested. This presentation starts with the current applications of low-frequency wireless sensors in civil infrastructures and highlights both the hardware and software development of the WISP. With its compact modularized design, this configurable prototype can provide a versatile platform for wireless sensing research and development. A distributed signal processing algorithm embedded in the WISP for localizing the damage is discussed. Lastly the current work on applying the wireless sensor networks in field tests and imbedded multifunctional carbon nanotube-based sensors will be provided. 时间:2008年11月5日上午10:00-11:30 地点:综合实验1号楼602-604 主办单位:工业装备结构分析国家重点实验室,工程力学系 |