Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-26639 Zeitschriftenartikel Schukar, Vivien; Kadoke, Daniel; Kusche, Nadine; Münzenberger, Sven; Gründer, Klaus-Peter; Habel, Wolfgang Validation and qualification of surface-applied fibre optic strain sensors using application-independent optical techniques Surface-applied fibre optic strain sensors were investigated using a unique validation facility equipped with application-independent optical reference systems. First, different adhesives for the sensor's application were analysed regarding their material properties. Measurements resulting from conventional measurement techniques, such as thermo-mechanical analysis and dynamic mechanical analysis, were compared with measurements resulting from digital image correlation, which has the advantage of being a non-contact technique. Second, fibre optic strain sensors were applied to test specimens with the selected adhesives. Their strain-transfer mechanism was analysed in comparison with conventional strain gauges. Relative movements between the applied sensor and the test specimen were visualized easily using optical reference methods, digital image correlation and electronic speckle pattern interferometry. Conventional strain gauges showed limited opportunities for an objective strain-transfer analysis because they are also affected by application conditions. Bristol IOP Publ. Ltd. 2012 Measurement science and technology 23 8 085601-1 - 085601-9 10.1088/0957-0233/23/8/085601 2016-02-19 OPUS4-25486 Zeitschriftenartikel Schukar, Vivien; Kusche, Nadine; Habel, Wolfgang How reliably do fiber Bragg grating patches perform as strain sensors? In Germany, the first guideline for the use of fiber Bragg grating strain sensors, 'Optical Strain Sensor based on Fiber Bragg Grating' (Berlin, Germany: Beuth-Verlag, 2010), has been developed by the GESA guideline group of VDI, 'The Association of German Engineers' and published by Beuth-Verlag. This guideline provides the basic specifications of this sensor type and the sensor characteristics, which have to be known for a reliable sensor performance. In conformity to this guideline, experimental investigations on the strain transfer characteristics of fiber Bragg grating patches have been carried out. A comparison between patches and resistance strain gauges during tensile tests and combined temperature and tensile loading was carried out. The evaluated strain gauge factor and the temperature sensitivity of the strain gauge factor have been compared to the manufacturer's data. The overall performance of the patches has been evaluated. The experimental investigations showed that there are considerable disagreements between the manufacturer's specifications and the observed characteristics. New York, NY, USA Institute of Electrical and Electronics Engineers (IEEE) 2012 IEEE Sensors Journal 12 1 128 132 10.1109/JSEN.2011.2139202 2016-02-19 OPUS4-27627 Zeitschriftenartikel Schukar, Vivien; Kusche, Nadine; Kalinka, Gerhard; Habel, Wolfgang Field deployable fiber bragg grating strain patch for long-term stable health monitoring applications A fiber Bragg grating (FBG) strain patch specially adapted for long-term and high-strain applications has been developed and characterized. The design concept for the patch is based on a glass-fiber reinforced plastic (gfrp) carrier material. The developed concept for the FBG integration into the carrier material was derived from reliable integration procedure of FBG sensors into composite structures. The patches' temperature sensitivity, strain gauge factor, fiber-matrix interface adhesion and fatigue behavior were characterized. As a result, FBG strain patches with linear temperature and strain behavior, as well as excellent fatigue resistance, were developed and can be used as part of a monitoring system for advanced composite materials in aerospace structures or wind turbine power plants. Basel MDPI 2013 Applied sciences 3 1 39 54 urn:nbn:de:kobv:b43-276271 10.3390/app3010039 http://creativecommons.org/licenses/by/3.0/de/deed.de 2016-02-20 OPUS4-37670 Beitrag zu einem Tagungsband Schukar, Vivien; Köppe, Enrico; Hofmann, Detlef; Westphal, Anja; Sahre, Mario; Gong, Xin; Bartholmai, Matthias; Beck, Uwe Magnetic field detection with an advanced FBG-based sensor device A high-performance fiber Bragg grating-based (FBG) sensor device has been developed for the detection of small magnetic fields. Based on a smart multilayer jacket around the fibre over the physical length of the FBG, magnetic fields generated by rotating machine parts, power generators or power cable can be easily detected, analysed and evaluated. Consequently, this innovative, on-line and non-contact inspection method results in an increase in quality and reliability of high-performing machine parts, devices and cables. The basic physical principle is based on a magnetostrictive multilayer system that strains the high-resolution FBG element in presence of magnetic fields. Subsequently, a fixed relationship between induced magnetic field and wavelength change of the FBG element describes the characteristic sensitivity curve. Intensive tests regarding characterisation of this magnetic field FBG sensor have been carried out and its performance has been evaluated. Elsevier Ltd. 2016 30th Eurosensors Conference - EUROSENSORS 2016 168 30th Eurosensors Conference, EUROSENSORS 2016 Budapest, Hungary 04.09.2016 07.09.2016 1270 1274 urn:nbn:de:kobv:b43-376703 10.1016/j.proeng.2016.11.445 http://creativecommons.org/licenses/by-nc-nd/3.0/de/deed.de 2017-01-05 OPUS4-41583 Zeitschriftenartikel Schukar, Vivien; Köppe, Enrico; Hofmann, Detlef; Mitzkus, Anja; Gong, Xin; Sahre, Mario; Bartholmai, Matthias; Beck, Uwe Emri, Igor A contribution to intelligent automatic validation of structure-integrated fibre optic strain sensors An auto-validation tool for the reliability quantification of materials integrated fiber Bragg grating (FBG) strain sensors have been developed and tested. The FBG strain sensor was jacketed with a magnetostrictive layer based on iron-nickel which, when excited by a specific magnetic field, adds an artificial strain to the sensor. The fixed relationship between magnetic induction and wavelength shift of the FBG strain sensor characterizes the bond strength and adhesion between the sensor and the surrounding structure. Due to an easily applicable magnetic field, it is possible to validate the sensor performance in a non-contact, fast way without disturbing the data-acquisition process. Elsevier Ltd. 2017 Materials Today: Proceedings 4 33nd Danubia Adria Symposium on Advances in Experimental Mechanics Portorož, Slovenia 20.09.2016 23.09.2016 5, Part 1 5935 5939 10.1016/j.matpr.2017.06.073 2017-08-24