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KALFOS - a validation facility for strain transfer characterization of surface-applied strain sensors

  • Strain sensors embedded in or attached to structural components have to measure the real deformation of the structure over the whole period of use. The user must know how reliably installed sensors provide strain measurement results. For this purpose, test facilities or coupon tests are used. In order to characterize the strain transfer quality from the host structure into surface-applied strain sensors, a unique testing facility has been developed. This facility can be used both for fiber optic and resistance strain sensors. Originally developed for fiber Bragg grating based sensors, the KALFOS facility (=calibration of fiber optic sensors) uses Digital Image Correlation (DIC) and Electronic Speckle Pattern Interferometer (ESPI) as unbiased referencing methods. It is possible to determine experimentally the strain transfer mechanism under combined thermal and mechanical loading conditions. This experimental characterization method will reveal weaknesses in commonly used strainStrain sensors embedded in or attached to structural components have to measure the real deformation of the structure over the whole period of use. The user must know how reliably installed sensors provide strain measurement results. For this purpose, test facilities or coupon tests are used. In order to characterize the strain transfer quality from the host structure into surface-applied strain sensors, a unique testing facility has been developed. This facility can be used both for fiber optic and resistance strain sensors. Originally developed for fiber Bragg grating based sensors, the KALFOS facility (=calibration of fiber optic sensors) uses Digital Image Correlation (DIC) and Electronic Speckle Pattern Interferometer (ESPI) as unbiased referencing methods. It is possible to determine experimentally the strain transfer mechanism under combined thermal and mechanical loading conditions. This experimental characterization method will reveal weaknesses in commonly used strain sensors, and the investigation of the material systems used for fiber optic and other strain sensors (particularly the coating/substrate - adhesive combination). The KALFOS facility allows matching of specific measurement requirements with environmental conditions.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Wolfgang Habel, Nadine Kusche, Sven Münzenberger, Vivien Schukar
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):SAE 2011 AeroTech Congress & Exhibition
Jahr der Erstveröffentlichung:2011
Herausgeber (Institution):SAE International
Ausgabe/Heft:Paper 2011-01-2606
Erste Seite:1
Letzte Seite:7
Freie Schlagwörter:Fiber optic sensors; Strain sensor; Structural health monitoring; Surface application; Validation
Veranstaltung:SAE 2011 AeroTech Congress & Exhibition
Veranstaltungsort:Toulouse, France
Beginndatum der Veranstaltung:18.10.2011
Enddatum der Veranstaltung:21.10.2011
DOI:https://doi.org/10.4271/2011-01-2606
Verfügbarkeit des Volltexts:Volltext-PDF im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein