基于双目视觉的大跨度桥梁振动微位移测量

Measurement of Vibration Micro-displacement of Long-span Bridges Based on Binocular Vision

为减少大跨度桥梁的误差,研究基于双目视觉的大跨度桥梁振动微位移测量方法.微位移测量标定点预处理,并对承台实现对应的测量.建立双目梯度振动微位移测量结构,并在双目视觉技术下设计公垂重构测量模型,以此为基础,通过单应处理法来最终实现双目视觉下桥梁振动微位移的测量.实例分析表明:在不同的振动频率作用下,应用双目视觉技术的桥梁微位移测量得出的误差相对较小,说明其测量效果比较好,数据的准确程度很高.

In order to reduce the errors of long-span bridges,the vibration micro-displacement measurement method of long-span bridges based on binocular vision is studied.Pretreatment of calibration points for micro-displacement measurement,and corresponding measurement of pile caps.The measurement structure of binocular gradient vibration micro-displacement is established,and the measurement model of vertical reconstruction is designed under binocular vision technology.Based on this,the measurement of bridge vibration micro-displacement under binocular vision is finally realized by homography.The analysis shows that under different vibration frequencies,the error of bridge micro-displacement measurement with binocular vision technology is relatively small,which shows that the measurement effect is better and the accuracy of data is very high.