基于计算机视觉的桥梁挠度测量方法及应用  

Computer Vision Based Bridge Deflection Measurement Method and Application

作　　者：杨晓华 王卫国 范啸 黄正荣 刘立豪 YANG Xiaohua;WANG Weiguo;FAN Xiao;HUANG Zhengrong;LIU Lihao(China Railway Construction Investment Group Co.,Ltd.,Beijing 100855,China;Institute of Intelligent Optical Measurement and Detection,Shenzhen 518060,China)

机构地区：[1]中国铁建投资集团有限公司,北京100855 [2]深圳大学智能光测研究院,广东深圳518060

出　　处：《世界桥梁》2025年第1期96-101,共6页World Bridges

基　　金：交通运输行业重点科技项目(2022-MS1-023)。

摘　　要：为有效评估桥梁的安全性能,提出一种基于计算机视觉的桥梁挠度测量方法。该测量方法由红外光源标志与加装红外滤光片的相机测站组成桥梁挠度摄像测量系统,在桥墩上安装相机,并在桥梁的多个关键位置设置红外光源标志,通过监测相机图像中标志点的像素点坐标变化量,实时解算桥梁上各监测点挠度。以湖南省澧水特大桥为背景,使用该方法进行该桥90 m跨主梁挠度的长期结构健康监测。结果表明:该桥梁挠度测量方法具有多点同步和实时监测等优势,采用红外光源标志避免了可见光的影响,实现24 h全天监测,且可有效修正相机运动误差,实现桥梁多点挠度实时同步自校准监测,为桥梁健康监测和安全性能评估提供准确的挠度监测数据。To effectively assess the safety performance of bridges,a bridge deflection measurement method based on computer vision is proposed.This method consists of an infrared light source marker and a camera station equipped with an infrared filter,forming a bridge deflection measurement system.Cameras are installed on bridge piers,while infrared markers are placed at several key positions on the bridge.By monitoring the changes in pixel coordinates of the markers in the camera images,the deflection of each monitoring point on the bridge is calculated in real time.This method has applied to the Lishui Bridge for long-term structural health monitoring of the 90-m main span.The results demonstrate that the proposed deflection measurement method offers advantages such as multi-point synchronization and real-time monitoring.By employing infrared light source markers,it avoids the interference of visible light and enables 24-hour monitoring.Moreover,the system can effectively correct for camera motion errors,achieving real-time,synchronized,and self-corrected multi-point deflection monitoring,thus providing accurate deflection data for bridge health monitoring and safety performance evaluation.

关 键 词：桥梁工程 结构健康监测 挠度 计算机视觉 实时测量 多点同步 测量方法 

分 类 号：U448[建筑科学—桥梁与隧道工程] U446.2[交通运输工程—道路与铁道工程]