| 一种改进的单目视觉桥梁挠度非接触测量方法 |
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| 引用本文： | 刘少平,杨永波,张东升,赵芳,邹宇.一种改进的单目视觉桥梁挠度非接触测量方法[J].测绘通报,2021,0(10):98-102. |
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| 作者姓名： | 刘少平 杨永波 张东升 赵芳 邹宇 |
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| 作者单位： | 1. 武汉中岩科技股份有限公司, 湖北 武汉 430074;2. 上海大学力学系, 上海 200444 |
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| 基金项目： | 国家重点研发计划（2018YFF01014200） |
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| 摘 要： | 本文在现有单目视觉测量方法基础上，提出了一种相机真实俯仰角计算算法，结合图像快速相关匹配与定位算法，可完成桥梁挠度的快速精确测量。通过精度验证试验和挠度对比测试试验，得到了相应的结果，结果表明：①不考虑目标点真实俯仰角变化的测量方法在距离视场中心较远的位置测量结果中误差较大；②单目视觉方法测量结果与角钢作竖直向下的刚体位移保持一致；③单目视觉方法与GPS测量的挠度曲线变化趋势和测量数值基本一致。试验验证了本文方法的可行性及准确性，可为今后基于数字图像相关方法的土木工程变形测量技术研究提供参考。
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| 关 键 词： | 桥梁 挠度 单目视觉 真实俯仰角 数字图像相关方法 |
| 收稿时间： | 2020-10-15 |
| 修稿时间： | 2021-05-19 |
An improved method of the non-contact measuring method of bridge deflections based on monocular vision |
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| LIU Shaoping,YANG Yongbo,ZHANG Dongsheng,ZHAO Fang,ZOU Yu.An improved method of the non-contact measuring method of bridge deflections based on monocular vision[J].Bulletin of Surveying and Mapping,2021,0(10):98-102. |
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| Authors: | LIU Shaoping YANG Yongbo ZHANG Dongsheng ZHAO Fang ZOU Yu |
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| Institution: | 1. Wuhan Sinorock Technology Co., Ltd., Wuhan 430074, China;2. Department of Mechanics, Shanghai University, Shanghai 200444, China |
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| Abstract: | On the basis of the existing monocular vision measurement,an algorithm about real pitch angle calculation is proposed, combined with an image fast correlation matching and positioning algorithm,which can complete the rapid and accurate measurement of the bridge deflection.Through the accuracy verification test and the deflection comparison test, the corresponding results are obtained.The results show that:①The general deflection measurement method which does not consider the real pitch angle change of the target point has a large error in the measurement result which is far away from the center of the field of view. ②The measurement results of monocular vision method are consistent with the vertical downward rigid body displacement of Angle steel. ③The monocular vision method is basically consistent with the deflection curve variation trend and measurement value measured by GPS, the feasibility and accuracy of the proposed method for monitoring bridge deflection are fully verified. It can provide reference for the research of civil engineering deformation measurement technology based on digital image correlation method in the future. |
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| Keywords: | bridge deflection monocular vision real pitch angle digital image correlation method |
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