基于LabVIEW的桥梁健康监测数据采集系统

桥梁健康监测的第一步是如何实现现场桥梁结构输入输出数据和环境音像资料的精确采集和存储.针对香港新界西青衣南桥的特点,基于LabVIEW软件平台,开发桥梁健康监测数据采集系统,采集并存储桥面运行重车车型、轴数、车速和车辆视频音像资料以及运行重车作用下桥梁的应变和加速度响应时程数据,为桥梁健康监测提供高精度实时原始数据.五昼夜的现场监测结果表明该系统运行正常、桥梁响应数据采集精度高、运行车辆音像资料全面,不失为大型桥梁健康监测采集系统的有益尝试.

A LabVIEW-based data acquisition system for bridge health monitoring

Higher accuracy of data acquisition should be the first step for the bridge health monito-ring. According to the characteristics of Tsing Yi South bridge in the New Territories West in Hong Kong and based on the LabVIEW software platform, the data acquisition system for the particular bridge health monitoring is developed. It can acquire the responses of the bridge under the moving heavy trucks by u-sing different kinds of sensors, namely strain gauges and aceelerometers. Meanwhile, it can record the video information about the motion of vehicles on the bridge, such as vehicles types, axle numbers of ve-hicles, speeds of vehicles, and so on. The data recorded through five consecutive days and nights show that the bridge health monitoring system is effective, reliable and with a higher accuracy, which may be a useful try for designing large bridge health monitoring system in the future.