Road and Bridge Research Institute, 03-302 Warsaw, Poland.
Institute of Civil Engineering, Poznan University of Technology, 60-965 Poznań, Poland.
Sensors (Basel). 2020 May 12;20(10):2767. doi: 10.3390/s20102767.
In the case of the monitoring of bridges, the determination of vertical displacements is one of the most important issues. A new measuring system has been developed and implemented for assessment of railway bridges based on measurements of the structural response to passing trains. The system uses inertial sensors: Inclinometers and accelerometers that do not need any referential points. The system records signals related to the passage of a train over a monitored bridge. The signals from inclinometers before the train's entry are used to determine the static movement. Integrated signals from inclinometers and accelerometers are used to determine dynamic displacements when the train goes through the bridge. Signals from inclinometers are used to determine the so-called "quasi-static" component of the displacement and signal from the accelerometer to determine the dynamic component. Field tests have been carried out on a viaduct along a high-speed railway line. Periodic comparative measurements are carried out using a Total Station to verify static measurements and using inductive sensors to verify dynamic measurements. Tests of the system carried out so far have proven its usefulness for monitoring bridges in a high-speed railway (up to 200 km/h) with high accuracy while determining dynamic displacements.
在桥梁监测中，确定垂直位移是最重要的问题之一。已经开发并实施了一种新的测量系统，用于基于对通过列车的结构响应测量来评估铁路桥梁。该系统使用惯性传感器：不需要任何基准点的倾斜计和加速度计。该系统记录与监测桥梁上通过的列车相关的信号。在列车进入之前的倾斜计信号用于确定静态运动。当列车通过桥梁时，倾斜计和加速度计的综合信号用于确定动态位移。倾斜计的信号用于确定位移的所谓“准静态”分量，而加速度计的信号用于确定动态分量。已经在一条高速铁路沿线的高架桥进行了现场测试。使用全站仪进行定期比较测量，以验证静态测量，并使用感应传感器验证动态测量。迄今为止进行的系统测试证明了其在以高精度确定动态位移的情况下，用于监测高速铁路（高达 200 公里/小时）桥梁的有用性。
