论文部分内容阅读
由于在施工成本和安装、维护便易性的突出优势,无线传感技术现越来越多地应用到大型结构上。然而受到长距离实时通信、长期供电和系统室外可靠性等关键问题的制约,结构健康监测的无线化目前还有待发展。本项目以国内某在建大跨度体育馆结构为应用对象,设计了一套基于Narada模块的无线健康监测系统,用于观测该结构加速度、应变和温度的实时变化。现场实测结果检验了该套系统在实际工程中进行多点实时无线动态测量和事件触发等功能,并能适应大跨度空间结构体量庞大、构型复杂、测点繁多等特点;与此同时还反映出无线传感技术应用于工程健康监测中的一些共性问题。该系统有望在其他复杂大型结构整体健康监测中推广应用。
Due to the prominent advantages of construction cost and ease of installation and maintenance, wireless sensing technology is being applied to large structures more and more. However, due to the constraints of key issues such as long-distance real-time communication, long-term power supply and outdoor reliability of the system, the wireless monitoring of structural health monitoring is still to be developed. Based on the structure of a large-span stadium under construction in China, a set of wireless health monitoring system based on Narada module is designed to observe real-time changes of acceleration, strain and temperature of the structure. The field test results show that the system performs many real-time wireless dynamic measurement and event triggering in the actual project, and can adapt to the characteristics of large-span space structure, complex configuration and numerous measuring points. At the same time It reflects some common problems that wireless sensor technology applied in engineering health monitoring. The system is expected to be widely used in the overall health monitoring of other complex large structures.