利用数字摄影测量进行钢结构挠度的变形监测

徐芳; 于承新; 黄桂兰; 刘友光

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利用数字摄影测量进行钢结构挠度的变形监测

徐芳, 于承新, 黄桂兰, 刘友光

文章导航 > 武汉大学学报 ● 信息科学版 > 2001 > 26(3): 256-260

徐芳, 于承新, 黄桂兰, 刘友光. 利用数字摄影测量进行钢结构挠度的变形监测[J]. 武汉大学学报 ● 信息科学版, 2001, 26(3): 256-260.

引用本文:

徐芳, 于承新, 黄桂兰, 刘友光. 利用数字摄影测量进行钢结构挠度的变形监测[J]. 武汉大学学报 ● 信息科学版, 2001, 26(3): 256-260.

XU Fang, YU Chengxin, HUANG Guilan, LIU Youguang. The Monitor of Steel Structure Bend Deformation Based on Digital Photogrammetry[J]. Geomatics and Information Science of Wuhan University, 2001, 26(3): 256-260.

Citation:

XU Fang, YU Chengxin, HUANG Guilan, LIU Youguang. The Monitor of Steel Structure Bend Deformation Based on Digital Photogrammetry[J]. Geomatics and Information Science of Wuhan University, 2001, 26(3): 256-260.

利用数字摄影测量进行钢结构挠度的变形监测

1 武汉大学测绘科学与技术学院, 武汉市珞喻路129号, 430079;
2 山东建筑工程学院科研处, 济南市和平路47号, 250014;
3广州市规划局自动化中心, 广州市吉祥路80号, 510030

基金项目: 山东省科委科技计划资助,项目(981206303)

详细信息

作者简介:
徐芳,博士生。现主要从事图像处理和数字近景摄影测量研究。E-mail:xf-uang@263.net

中图分类号: P231.5;TB3

The Monitor of Steel Structure Bend Deformation Based on Digital Photogrammetry

1 School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, China, 430079;
2 Department of Science Study Service, Shandong Institute of Architecture and Engineering, 47 Heping Road, Jinan, China, 250014;
3 Automatization Center, Guangzhou Design Burean, 80 Jixiang Road, Guangzhou, China, 510030

摘要: 钢结构的异常变形或局部损坏可通过荷载-挠度曲线以及纵轴线的挠度曲线反映出来。利用数字摄影测量方法进行钢结构的变形监测是传统测量方式的变革,可实现半自动的实时监测。本文介绍了相应的测量方法并给出了实验结果。
- 荷载-挠度曲线 /
- 受压形变曲线 /
- 中心线 /
- 目标点识别 /
- 目标点定位
Abstract: The load-bend curve and vertical axis curve express the unusual deformation or part destroy of steel structure.The digital photogrammetry method used to monitor the deformation of steel structures is an innovation of tradition surveying method. In order to prove the feasibility of using digital photogrammetry method in monitoring the deformation of steal structures,an experiment was conducted as follows.First,26 circle signs were averagely placed on the testing steel frame which was made in one tenth size of the real one.Second,a pressure experiment for the testing steel frame was conducted with 200t hydraulic machine.A series of images were taken from the vertical side at pressing status and bowed point status.Then the images were transmitted to the computer.Third,we process the images.The coordinates of each sign were acquired.Finally,the deformation of the steel structure could be analyzed. During image processing,we got the binary image and traced the edge's point.We detected and extracted the circle in the binary image.Each circle has just one horizontal symmetrical axis and one vertical symmetrical axis.The crossing point of the horizontal symmetrical axis and the vertical symmetrical axis is the circle centre.All possible horizontal and vertical axis can be extracted in the image.All the pixel symmetric to one pair axis could be grouped into one subimage,Thus all the isolated points,lines,and other irregular curves are removed at this stage. We got the image's coordinates of A and B at every load.The coordinates were horizontally moved,rotated,shrunk and enlarged.They became a series of coordinates of the same direction based on the left under side corner point as zero.The method mentioned above can achieve semiautomatic real-time monitor deformation.This paper introduces the surveying method,and presents the result of experiments.
- load-bend curve /
- deformation curve by force /
- central line /
- object detection /
- object location

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利用数字摄影测量进行钢结构挠度的变形监测

1 武汉大学测绘科学与技术学院, 武汉市珞喻路129号, 430079;

2 山东建筑工程学院科研处, 济南市和平路47号, 250014;

3广州市规划局自动化中心, 广州市吉祥路80号, 510030

基金项目: 山东省科委科技计划资助,项目(981206303)

作者简介:
徐芳,博士生。现主要从事图像处理和数字近景摄影测量研究。E-mail:xf-uang@263.net

收稿日期: 2000-12-10
刊出日期: 2001-03-05

中图分类号: P231.5;TB3

关键词:

中心线 /

摘要: 钢结构的异常变形或局部损坏可通过荷载-挠度曲线以及纵轴线的挠度曲线反映出来。利用数字摄影测量方法进行钢结构的变形监测是传统测量方式的变革,可实现半自动的实时监测。本文介绍了相应的测量方法并给出了实验结果。

English Abstract

The Monitor of Steel Structure Bend Deformation Based on Digital Photogrammetry

1 School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, China, 430079;

2 Department of Science Study Service, Shandong Institute of Architecture and Engineering, 47 Heping Road, Jinan, China, 250014;

3 Automatization Center, Guangzhou Design Burean, 80 Jixiang Road, Guangzhou, China, 510030

Received Date: 2000-12-10
Publish Date: 2001-03-05

Keywords:

Abstract: The load-bend curve and vertical axis curve express the unusual deformation or part destroy of steel structure.The digital photogrammetry method used to monitor the deformation of steel structures is an innovation of tradition surveying method. In order to prove the feasibility of using digital photogrammetry method in monitoring the deformation of steal structures,an experiment was conducted as follows.First,26 circle signs were averagely placed on the testing steel frame which was made in one tenth size of the real one.Second,a pressure experiment for the testing steel frame was conducted with 200t hydraulic machine.A series of images were taken from the vertical side at pressing status and bowed point status.Then the images were transmitted to the computer.Third,we process the images.The coordinates of each sign were acquired.Finally,the deformation of the steel structure could be analyzed. During image processing,we got the binary image and traced the edge's point.We detected and extracted the circle in the binary image.Each circle has just one horizontal symmetrical axis and one vertical symmetrical axis.The crossing point of the horizontal symmetrical axis and the vertical symmetrical axis is the circle centre.All possible horizontal and vertical axis can be extracted in the image.All the pixel symmetric to one pair axis could be grouped into one subimage,Thus all the isolated points,lines,and other irregular curves are removed at this stage. We got the image's coordinates of A and B at every load.The coordinates were horizontally moved,rotated,shrunk and enlarged.They became a series of coordinates of the same direction based on the left under side corner point as zero.The method mentioned above can achieve semiautomatic real-time monitor deformation.This paper introduces the surveying method,and presents the result of experiments.

徐芳, 于承新, 黄桂兰, 刘友光. 利用数字摄影测量进行钢结构挠度的变形监测[J]. 武汉大学学报 ● 信息科学版, 2001, 26(3): 256-260.

引用本文:

徐芳, 于承新, 黄桂兰, 刘友光. 利用数字摄影测量进行钢结构挠度的变形监测[J]. 武汉大学学报 ● 信息科学版, 2001, 26(3): 256-260.

Citation: