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 OPUS4-37131 Zeitschriftenartikel Köppe, Enrico; Bartholmai, Matthias; Daum, Werner; Gong, Xing; Hofmann, Detlef; Basedau, Frank; Schukar, Vivien; Westphal, Anja; Sahre, Mario; Beck, Uwe New self - diagnostic fiber optical sensor technique for structural health monitoring Fiber optic sensors have gained increasing importance in recent years and are well established in many areas of industrial applications. In this paper, we introduce a concept of a self-diagnostic fiber optic sensor. The presented sensor is to resolve the problems of embedded fiber optic sensors in complex structures and to enable the validation under operational conditions. For this purpose, different magnetostrictive coated fiber optic sensors were developed and various experiments were performed to verify their mode of Operation and to determine the respective reproducibility. The measuring principle is illustrated by obtained experimental results, which showed a change in wavelength from 1 pm at a magnetic field strength change of 0.25 mT. In addition, the temperature characteristics of the implemented magnetostrictive sensor were analyzed and an experimental factor of 1.5 compared to a reference fiber optic sensor was determined. 2016 Materials Today: Proceedings 3 32nd DANUBIA ADRIA SYMPOSIUM on Advances in Experimental Mechanics Starý Smokovec, Slovakia 22.09.2015 25.09.2015 4 1009 1013 10.1016/j.matpr.2016.03.038 2016-08-12 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 OPUS4-37645 Beitrag zu einem Tagungsband Schukar, Vivien; Köppe, Enrico; Hofmann, Detlef; Westphal, Anja; Sahre, Mario; Beck, Uwe; Gong, Xing; Bartholmai, Matthias Aulova, Alexandra; Rogelj Ritonja, A.; Emri, I. A contribution to intelligent automatic validation of structure-integrated fibre optic strain sensors Sensors integrated into devices and structures provide essential data to control, optimize or manage machines and structural components. In the last years, processes, applications and machine parts became more and more intelligent. Consequently, the need for sensor validation increased significantly in order to rely on sensor data and measurement results. Structure-integrated fibre optic strain sensors, such as fiber Bragg gratings (FBG), are of special interest in the composite manufacturing industry. This type of sensor makes it possible to gain information and to collect measurement data about entire production processes and whole life-time cycles of composite-made machine parts and structures. However, validation concepts and approaches for this type of sensors are barely reported in literature. Furthermore, all the reported activities have the drawback that the sensor diagnosis strategy is implemented as limited mathematical models and/or complex time-consuming spectral analysis tools which are applied in data post-processing loops. However, to automate sensor validation and to apply real-time and in-field sensor fault detection, it is necessary to acquire measurement data and information about the measurement reliability at the same time. Ljubljana Narodna in univerzitetna knjižnica, Ljubljana 2016 33rd Danubia- Adria Symposium on Advances in Experimental Mechanics - BOOK OF ABSTRACTS 978-961-94081-0-0 33rd Danubia- Adria Symposium on Advances in Experimental Mechanics Portorož, Slovenia 20.09.2016 23.09.2016 180 181 2016-10-05 OPUS4-38634 Beitrag zu einem Tagungsband Schukar, Vivien; Gong, Xin; Hofmann, Detlef; Basedau, Frank; Köppe, Enrico; Bartholmai, Matthias; Westphal, Anja; Sahre, Mario; Beck, Uwe Berghmans, F.; Mignani, A. G. Modelling and simulation of a fibre Bragg grating strain sensor based on a magnetostrictive actuator principle A new concept for the self-diagnosis of embedded fiber Bragg grating (FBG) strain sensors was developed, simulated and experimentally tested. This concept is based on a magnetostrictive metallic layer directly coated on the fibre cladding over the grating segment of the FBG sensor, so that an on-demand external magnetic field in a millitesla scale can produce a controllable artificial strain as an indication signal for the remote optical interrogator. The relationship between the pre-defined magnetic field and its induced Bragg wavelength shift characterizes this validation concept. Any deviation of the local bonding state of the interfaces from the initial or/and any change of shear strain transferring mechanism from composite matrix to the optical fibre core will result in alterations in this sensitive relationship, and thus triggers an immediate alert for a further inspection. The finite element method is used to simulate the strain of this configuration as result of different values of the magnetic field in order to optimize the geometrical sensor parameters. The simulations are verified by experiments results. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. SPIE Digital Library SPIE - the international society for optics and photonics 2016 Optical Sensing and Detection IV 9899 9781510601444 Optical Sensing and Detection IV Brüssel, Belgium 03.04.2016 07.04.2016 9899-39 10.1117/12.2224728 2016-12-09 OPUS4-39129 Zeitschriftenartikel Mitzkus, Anja; Sahre, Mario; Reinstädt, Philipp; Griepentrog, Michael; Beck, Uwe; Köppe, Enrico; Bartholmai, Matthias; Basedau, Frank; Hofmann, Detlef; Gong, Xin; Schukar, Vivien Altbekannter Watts-Elektrolyt, junge Hightech-Anwendung, Nickel- und Nickel-Eisen-Schichten als magnetostriktive Aktorschicht auf faseroptischen Sensoren Durch faseroptische Sensoren können Bauteile im Einsatz kontinuierlich überwacht und frühzeitig Informationen über Materialveränderungen gewonnen werden. Mittels einer magnetostriktiven Aktorschicht, welche den Sensor umhüllt, kann nun auch die korrekte Sensorfunktion jederzeit kontrolliert werden. Als Aktorschicht eignet sich galvanisch abgeschiedenes reines Nickel oder Nickel-Eisen in der Zusammensetzung 50:50. Um diese haftfest mit dem Sensor zu verbinden wurde ein ECD/PVD-Kombinationsschichtsystem entwickelt. Die mechanischen Eigenschaften der ECD-Schicht können sowohl mit einer auf die Fasergeometrie angepassten instrumentierten Eindringprüfung als auch einem 2-Punkt-Biegeversuch bestimmt werden. 2016 WoMAG 12 1 4 2017-02-09