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Distributed strain measurement with polymer optical fibers integrated into multifunctional geotextiles

  • Fiber optic sensors based on polymer optical fibers (POF) have the advantage of being very elastic and robust at the same time. Unlike silica fibers, standard PMMA POF fibers can be strained to more than 40% while fully maintaining their light guiding properties. We investigated POF as a distributed strain sensor by analysing the backscatter increase at the strained section using the optical time domain reflectometry (OTDR) technique. This sensing ability together with its high robustness and break-down strain makes POF well-suited for integration into technical textiles for structural health monitoring purposes. Within the European research project POLYTECT (Polyfunctional textiles against natural hazards) technical textiles with integrated POF sensors, among others sensors are being developed for online structural health monitoring of geotechnical structures. Mechanical deformation in slopes, dams, dikes, embankments and retrofitted masonry structures is to be detected beforeFiber optic sensors based on polymer optical fibers (POF) have the advantage of being very elastic and robust at the same time. Unlike silica fibers, standard PMMA POF fibers can be strained to more than 40% while fully maintaining their light guiding properties. We investigated POF as a distributed strain sensor by analysing the backscatter increase at the strained section using the optical time domain reflectometry (OTDR) technique. This sensing ability together with its high robustness and break-down strain makes POF well-suited for integration into technical textiles for structural health monitoring purposes. Within the European research project POLYTECT (Polyfunctional textiles against natural hazards) technical textiles with integrated POF sensors, among others sensors are being developed for online structural health monitoring of geotechnical structures. Mechanical deformation in slopes, dams, dikes, embankments and retrofitted masonry structures is to be detected before critical damage occurs. In this paper we present the POF strain sensor properties, reactions to disturbing influences as temperature and bends as well as the results of the different model tests we conducted within POLYTECT. We further show the potential of perfluorinated graded-index POF for distributed strain sensing with increased spatial resolution and measurement lengths.zeige mehrzeige weniger

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Autor*innen:Sascha LiehrORCiD, Philipp Lenke, Katerina Krebber, M. Seeger, E. Thiele, H. Metschies, B. Gebreselassie, J.C. Münich, L. Stempniewski
Persönliche Herausgeber*innen: Francis Berghmans, Anna Grazia Mignani, Antonello Cutolo, Patrick P. Meyrueis, Thomas P. Pearsall
Dokumenttyp:Beitrag zu einem Sammelband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Optical Sensors 2008
Jahr der Erstveröffentlichung:2008
Herausgeber (Institution):SPIE Europe
Verlag:SPIE
Verlagsort:Bellingham
Jahrgang/Band:7003
Ausgabe/Heft:7003
Erste Seite:700302-1 - 700302-15
Freie Schlagwörter:Distributed sensor; Fiber optic sensors; Geotextiles; OTDR; POF sensors; Polymer optical fibers (POF); Strain sensor; Structural health monitoring
Veranstaltung:Optical Sensors 2008
Veranstaltungsort:Strasbourg, France
Beginndatum der Veranstaltung:2008-04-07
Enddatum der Veranstaltung:2008-04-10
DOI:10.1117/12.780508
ISSN:0277-786X
ISBN:978-0-8194-7201-4
Bemerkung:
Serientitel: Proceedings of SPIE – Series title: Proceedings of SPIE
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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