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Videogrammetric monitoring of as-built membrane roof structures / S.Y. Lin in Photogrammetric record, vol 23 n° 122 (June - August 2008)  

Public [article]  inPhotogrammetric record > vol 23 n° 122 (June - August 2008) . - pp 128 - 147 Titre : Videogrammetric monitoring of as-built membrane roof structures Type de document : Article/Communication Auteurs : S.Y. Lin, Auteur ; Jon Mills, Auteur ; P.D. Gosling, Auteur Année de publication : 2008 Article en page(s) : pp 128 - 147 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] balise [Termes IGN] déformation de surface [Termes IGN] données localisées 3D [Termes IGN] modèle numérique de surface [Termes IGN] surveillance d'ouvrage [Termes IGN] toit [Termes IGN] Vidéogrammétrie Résumé : (Auteur) A monitoring system that uses applied geomatics techniques, including videogrammetry and terrestrial laser scanning, has been developed in order to investigate the dynamic behaviour of as-built membrane roof structures. To accommodate the problems involved in measuring such roof structures, examples of which include uniform surface texture and unreachable height, the system adopts a non-contact targeting methodology to substitute for traditional control techniques. In-house software was developed for processing the acquired video imagery in order to produce a sequential surface model of the membrane. This paper firstly reports on experiments conducted to demonstrate that the monitoring system was capable of measuring representative test structures with a precision of better than +1 mm. To prove the feasibility and transferability of the system, videogrammetric monitoring campaigns were subsequently performed at a real-world test site where two different types of membrane structure were observed. The sequential 3D surface models that were generated allowed the displacement of the membrane surfaces to be investigated over a period, during which the range of the movement reached over 20 mm. The information acquired from the system is proving to be of great value to structural engineers involved in research and development of such membrane structures. Copyright RS&PS + Blackwell Publishing Numéro de notice : A2008-294 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2008.00477.x En ligne : https://doi.org/10.1111/j.1477-9730.2008.00477.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29287 [article]

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