Six‐degree‐of‐freedom generalized displacements measurement based on binocular vision

Structural Control and Health MonitoringVolume 27, Issue 2 e2458 RESEARCH ARTICLE Six-degree-of-freedom generalized displacements measurement based on binocular vision Lijun Wu, Lijun Wu orcid.org/0000-0003-0468-3294 College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorYiyan Su, Yiyan Su College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorZhicong Chen, Corresponding Author Zhicong Chen zhicong.chen@fzu.edu.cn orcid.org/0000-0002-3471-6395 College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China Correspondence Zhicong Chen, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China. Email: zhicong.chen@fzu.edu.cnSearch for more papers by this authorShuying Chen, Shuying Chen College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorShuying Cheng, Shuying Cheng College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorPeijie Lin, Peijie Lin College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this author Lijun Wu, Lijun Wu orcid.org/0000-0003-0468-3294 College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorYiyan Su, Yiyan Su College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorZhicong Chen, Corresponding Author Zhicong Chen zhicong.chen@fzu.edu.cn orcid.org/0000-0002-3471-6395 College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China Correspondence Zhicong Chen, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China. Email: zhicong.chen@fzu.edu.cnSearch for more papers by this authorShuying Chen, Shuying Chen College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorShuying Cheng, Shuying Cheng College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this authorPeijie Lin, Peijie Lin College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaSearch for more papers by this author First published: 06 December 2019 https://doi.org/10.1002/stc.2458Citations: 10Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Summary Due to their large flexibility and small damping ratios, harmful vibrations could happen on cables under some external excitations, as for instance the rain–wind-induced vibration, which comes with a translational and rotational coupling. An experimental study of the phenomenon would be quite important in view of an appropriate design. However, the available rotational measurement approaches are not suitable for measuring the rotation of cable, because the installation of such devices alters the structural mechanical properties. Recently, low-cost vision-based structural displacement measurement methods have been widely used due to their flexible deployment and the noncontact measurement feature. But they cannot measure the rotational displacements directly. This paper proposes a rotational generalized displacement measurement method based on a binocular vision assisted by a coded cylinder. The three-dimensional coordinates of the coded points are acquired according to photogrammetry schemes. The cylinder centroid and its direction vector are obtained by a cylindrical fitting. Eventually, the translational and rotational generalized displacements are derived. In the cylinder fitting stage, one optimizes the cylinder model parameters via differential search. Experimental verifications are carried out to demonstrate that the proposed six-degree-of-freedom (6-DOF) generalized displacement measurement is feasible. Citing Literature Volume27, Issue2February 2020e2458 RelatedInformation