Measurement method of structural dynamic displacement based on machine vision and UAV

被引：0

作者：

Han Y. ^{[1
]}

Feng D. ^{[1
,2
]}

Wu G. ^{[1
,2
]}

机构：

[1] MOE Key Laboratory of Concrete and Prestressed Concrete Structures, Southeast University, Nanjing

[2] National and Local Joint Engineering Research Center for Intelligent Construction and Maintenance, Southeast University, Nanjing

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 19期

关键词：

displacement measurement; machine vision: camera motion correction; modal parametric identification; unmanned aerial vehicle (UAV);

D O I：

10.13465/j.cnki.jvs.2022.19.001

中图分类号：

学科分类号：

摘要：

Here, aiming at limitations of vision-based structural displacement measurement method, such as, insufficient resolution of camera or difficulty in selecting location of measurement base station, a structural dynamic displacement measurement method combining machine vision and unmanned aerial vehicle (UAV) was proposed. Taking laser spot projected by static laser lamp on structure surface as a reference, an algorithm was designed to automatically detect target measurement point and laser spot position, calculate and update scale factor frame by frame, estimate and eliminate motion of UAV itself, and then calculate absolute displacement of target measurement point. In order to verify the accuracy of the proposed method, a small frame model test was designed, and then this method was applied in large-scale earthquake simulation shaking table tests. The results showed that displacement responses obtained using the proposed method agree well with the reference data measured using laser displacement meter and accelerometer; the proposed method can better be applied in structural dynamic displacement measurement and modal parametric identification. © 2022 Chinese Vibration Engineering Society. All rights reserved.

引用

页码：1 / 7

页数：6

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