【摘要】 针对无线传感器网络技术在桥梁结构健康监测中的应用,研究并开发了基于无线传感器网络的桥梁结构健康监测系统。采用能量均衡分簇路由算法、时间同步算法和能量管理算法,组建了低功耗、节点能量消耗均衡、具有多跳路由结构的无线传感器网络。同时,应用加速度传感器检测桥梁振动的加速度数据,通过FFT变换由加速度数据得到桥梁的固有频率,并根据固有频率分析桥梁的健康状况。系统在公路高架桥中进行了应用试验,试验结果表明,系统便携性好,监测数据可靠。更多还原

【Abstract】 A wireless sensor network(WSN) for bridge health monitoring(BHM) is designed,implemented,deployed and tested on a road viaduct.The system formed a low-power,consuming energy balance and a multi-hop routing for wireless sensor networks,using energy balance clustering routing algorithm,time synchronization algorithm and energy management algorithms.The system tested in a road viaduct,using accelerometers to collect the real-time ambient vibrations of the bridge.In the application,the sensor nodes were arranged in the bridge,setting up a multiple sub-cluster multi-hop routing network architecture.Eventually,the natural frequency of bridge was got from the acceleration data through FFT transform.The test result show that the system is portable and reliable.更多还原