文章基本信息

标题：MEASUREMENT OF DEFLECTIONS IN CONCRETE BEAMS BY CLOSE-RANGE DIGITAL PHOTOGRAMMETRY
本地全文：下载
作者：Terry Whiteman ; Derek D Lichti ; I. Chandler 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2002
卷号：XXXIV Part 4
出版社：Copernicus Publications
摘要：This paper describes the use of digital photogrammetry for measurement of deflections in concrete beams during destructive testing. A two-video camera system was used to measure vertical deflections with a precision of ± 0.25mm (1 σ ). The system, network design and processing methods are described in detail. Results are presented from several tests of different types of beams. Some of the advantages over contact methods including three-dimensional measurement of deformation components, unrestricted measurement range and immunity to non-linear systematic errors are demonstrated. Comparison is made of photogrammetric and linear-variable-differential transformer deflection measurements
关键词：digital photogrammetry; deflection measurement; structural testing