Wireless Monitoring Techniques for Structural Health Monitoring

摘要

Recently, a variety of wireless structural health monitoring systems has been demonstrated as viable substitutes for traditional high-cost tethered monitoring systems. In this study, a prototype wireless sensing system is deployed upon the Voigt Bridge (La Jolla, CA) and a historical theatre (Detroit, MI) to validate its performance against cabled monitoring systems. Acceleration time history records due to ambient and forced vibrations collected from numerous wireless sensors distributed over the structure suggest excellent correlation with those obtained from the tethered systems. Furthermore, the embedded data processing capabilities of wireless sensors is highlighted; operational deflection shapes of the bridge and theatre deck are identified autonomously by the wireless sensor network using embedded peak picking algorithms.