无线传感器网络在桥梁健康监测中的应用研究

Health Monitoring of Bridge Using Wireless Sensor Networks

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。

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 muting for wireless sensor networks, using energy balance clustering muting 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.