Original title: Long term optical monitoring technique of displacement fields based on ArUco markers
Authors: Kunecký, Jiří
Document type: Papers
Conference/Event: SHATIS 22. International conference on structural health assessment of timber structures /6./, Praha (CZ), 20220907
Year: 2022
Language: eng
Abstract: In structural engineering it is often needed to measure tiny displacements of parts of the structure extremely precisely. For such a purpose it is often needed to use some type of sensor attached to the surface of the structure. This paper presents a new technique which simply uses computer vision libraries to measure displacement of markers originally developed for robotics. Such analysis can be under specific circumstances (2D planar movement) valid if we compare two images taken at different times with the same camera. Main advantage of this method is simplicity of use and low cost of markers, which can be printed in a standard office laser printer. The resolution (error) can be for standard cameras around 0.1 pixel. The method is especially developed for research of timber frames/joints behavior in real structures, because displacements of joints in creep or under load can reach an amplitude which is perfectly detectable by this method.
Keywords: ArUco markers; displacement measurement; long-term monitoring
Project no.: GA21-29389S (CEP)
Funding provider: GA ČR
Host item entry: Proceedings of the SHATIS 2022 – 6th International conference on structural health assessment of timber structures, ISBN 978-80-86246-54-3

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0333573

Permalink: http://www.nusl.cz/ntk/nusl-508693


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Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
Conference materials > Papers