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 OPUS4-56576 misc Maack, Stefan; Benner, Philipp; Kröll, Mirco; Prager, Jens; Daum, Werner; Casperson, Ralf; Heckel, Thomas; Spaltmann, Dirk; et al., Wahlster, W.; Winterhalter, C. Deutsche Normungsroadmap künstliche Intelligenz Ausgabe 2 Im Auftrag des Bundesministeriums für Wirtschaft und Klimaschutz haben DIN und DKE im Januar 2022 die Arbeiten an der zweiten Ausgabe der Deutschen Normungsroadmap Künstliche Intelligenz gestartet. In einem breiten Beteiligungsprozess und unter Mitwirkung von mehr als 570 Fachleuten aus Wirtschaft, Wissenschaft, öffentlicher Hand und Zivilgesellschaft wurde damit der strategische Fahrplan für die KI-Normung weiterentwickelt. Koordiniert und begleitet wurden diese Arbeiten von einer hochrangigen Koordinierungsgruppe für KI-Normung und -Konformität. Mit der Normungsroadmap wird eine Maßnahme der KI-Strategie der Bundesregierung umgesetzt und damit ein wesentlicher Beitrag zur „KI - Made in Germany" geleistet. Die Normung ist Teil der KI-Strategie und ein strategisches Instrument zur Stärkung der Innovations- und Wettbewerbsfähigkeit der deutschen und europäischen Wirtschaft. Nicht zuletzt deshalb spielt sie im geplanten europäischen Rechtsrahmen für KI, dem Artificial Intelligence Act, eine besondere Rolle. DIN e.V. und DKE 2022 1 448 2022-12-19 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 OPUS4-37053 Zeitschriftenartikel Habel, Wolfgang R.; Krebber, Katerina; Daum, Werner Results in standardization of FOS to support the use of SHM systems Measurement and data recording systems are important parts of a holistic Structural Health Monitoring (SHM) system. New sensor technologies such as fiber-optic sensors are often used; however, standards (or at least guidelines) are not yet available or internationally approved. This lack in standardization makes the acceptance of FOS technologies in complex SHM systems substantially difficult. A standard family for different FOS technologies is therefore being developed that should help to design SHM systems in an optimal way. International standardization activities take place in several standardization bodies such as IEC and ASTM, and within SHM societies such as ISHMII. The paper reports on activities in standardization of fiber-optic sensors, on results already achieved, and on newly started projects. Combined activities of fiber sensor experts and SHM experts from Civil Engineering are presented. These contributions should help owners of structures as well as developers of sensors and monitoring systems to select effective and validated sensing technologies. Using these standards, both parties find recommendations how to proceed in development of SHM systems to evaluate the structural behavior based on e.g. standardized fiber optic sensors, and to derive necessary measures, e.g. the optimal maintenance strategy. SPIE 2016 Proc. SPIE 9916 Sixth European Workshop on Optical Fibre Sensors 9916 Sixth European Workshop on Optical Fibre Sensors Limerick, Ireland 30.05.2016 31.05.2016 991625-1 991625-4 10.1117/12.2236863 2016-08-04 OPUS4-30834 Vortrag Daum, Werner Karriere in der Forschung 2014 VDI-Kongress der Studenten und Jungingenieure VDI-Kongress der Studenten und Jungingenieure Berlin, Germany 2014-06-13 2014-06-14 2016-02-20 OPUS4-31542 Posterpräsentation Daum, Werner Pulse shaping and alignment tests with the Split-Hopkinson Pressure Bar for validation 2014 31st Danubia Adria Symposium on Advances in Experimental Mechanics 31st Danubia Adria Symposium on Advances in Experimental Mechanics Kempten, Germany 2014-09-24 2014-09-27 2016-02-20 OPUS4-30657 Vortrag Daum, Werner Wireless technologies for structural health monitoring and transportation monitoring of dangerous goods 2014 IAEA Consultancy Meeting on Application of Wireless Technologies in Nuclear Power Plant Instrumentation and Control Systems IAEA Consultancy Meeting on Application of Wireless Technologies in Nuclear Power Plant Instrumentation and Control Systems Vienna, Austria 2014-04-08 2014-04-11 2016-02-20 OPUS4-31410 Vortrag Daum, Werner Die Entwicklung der internationalen Normung auf dem Gebiet der faseroptischen Sensorik 2014 Sensorikzentrum Mittelsachsen e.V.-Workshop "Faseroptische Sensortechnik" - Anwendungsfelder und Entwicklungstrends Sensorikzentrum Mittelsachsen e.V.-Workshop "Faseroptische Sensortechnik" - Anwendungsfelder und Entwicklungstrends Mittweida, Germany 2014-08-28 2014-08-29 2016-02-20 OPUS4-31725 Beitrag zu einem Tagungsband Brandes, K.; Daum, Werner; Hofmann, Detlef; Kubowitz, P. Lagrange multiplier test for structural damage of bridges Detecting spreading damage in bridges is a demanding task for engineers today when the ageing infrastracture of industriaiized countries is degradating more and more. To successfully deal with tbis problem, a really advanced method has been elaborated basing on Langrange Multiplier (LM) tests and following the principle of simplicity by Hilbert and extending comments by Helmholtz refering to a combination of measurement and analytical treatment. Finally, an easy mathematical fonnation has been created. Verein Deutscher Ingenieure (VDI) 2014 31st Danubia-Adria Symposium on advances in experimental mechanics (Proceedings) 978-3-00-046740-0 31st Danubia-Adria Symposium on advances in experimental mechanics Kempten, Germany 24.09.2014 27.09.2014 213 214 2016-02-20 OPUS4-31726 Beitrag zu einem Tagungsband Klunker, André; Köppe, Tabea; Daum, Werner Different numerical methods around the SHPB experiment The Split Hopkinson Pressure Bar (SHPB) is a materials testing apparatus primarily designed for the analysis of viscoplastic material behavior at very high strain rates. Because of its complexity it is common practice to simplify the underlying exact mechanical theory by making strong assumptions. On the one hand this has to be done to achieve any results at all on the other hand one commits systematic errors. Therefore we utilize different numerical and Simulation methods to analyze and minimize these errors. Verein Deutscher Ingenieure (VDI) 2014 31st Danubia-Adria Symposium on advances in experimental mechanics (Proceedings) 978-3-00-046740-0 31st Danubia-Adria Symposium on advances in experimental mechanics Kempten, Germany 24.09.2014 27.09.2014 189 190 2016-02-20 OPUS4-31729 Beitrag zu einem Tagungsband Köppe, Enrico; Hofmann, Detlef; Daum, Werner Absolute measuring EFPI-measurement system The absolute detection of a gap distance of loose and ftxed extrinsic Fabry-Perot interferometer (EFPI) sensors with conventional measurement Systems is not possible. Due to this EFPI-sensors were deemed to be unfit for distance determination in comparision with FBG sensors. With the conventional measurement method a continous measurement of the EFPIsensors was necessary. Otherwise data about the distance change was lost. Additional it is necessary to detect the tumaround points in the interference signal with 100%. This made it worse for the analysis and the use of the sensor. At BAM Federal Institute for Materials Research and Testing a measurement System called "EFPI-Scan" is developed which can measure the absolute gap distance of four connected EFPI-sensors synchronous. Every measurement channel is temperature independetn and long term stable. Test measurements showed a deviation of maximum ±1 gm per hour. Furthermore it is possible to measure with different measurement modes (abolute, relative and a combination of both). Special emphasis should be placed to the absolute measurement accuracy of ± 5 pm at a gap distance determination ftom 40 up to 4000 pm. Verein Deutscher Ingenieure (VDI) 2014 31st Danubia-Adria Symposium on advances in experimental mechanics (Proceedings) 978-3-00-046740-0 31st Danubia-Adria Symposium on advances in experimental mechanics Kempten, Germany 24.09.2014 27.09.2014 120 121 2016-02-20 OPUS4-31730 Beitrag zu einem Tagungsband Köppe, Tabea; Daum, Werner Pulse shaping and alignment tests with the split Hopkinson pressure bar for validation The Split Hopkinson Pressure Bar (SHPB) is a method for material characterization which works at strain rates from 102 - 104 1/s. This method can be used for example in the field of military engineering, in the field of deformation technology, automobile indurstry, aerospace industry or in other industrial fields. Controlled tests with the SHPB device enable Information about the dynamic material deformaion behaviour in the named strain rate area. The setup of the SHPB is not standarized and the measurement principle is dependent on simplifications. Due to this amongst others the problem with the dispersion of the measurement signal occurs. Furthermore it is possible that measurement uncertainties appear caused by the misalignment of the SHPB setup. In this work the influence of the alignment and a dispersion correction by pulse shaping is presented. On the one side for the alignment calibration tests are done. And on the other side for the dispersion influence correction with pulse shaping tests are done with TiA16V4. This material was choosen due to the fact that it can be compared with existing literature data. Verein Deutscher Ingenieure (VDI) 2014 31st Danubia-Adria Symposium on advances in experimental mechanics (Proceedings) 978-3-00-046740-0 31st Danubia-Adria Symposium on advances in experimental mechanics Kempten, Germany 24.09.2014 27.09.2014 242 243 2016-02-20 OPUS4-19072 Zeitschriftenartikel Appajaiah, Anilkumar; Wachtendorf, Volker; Daum, Werner Climatic exposure of polymer optical fibers: Thermooxidative stability characterization by chemiluminescence The optical transmission stability was investigated for commercially available polymer optical fibers (POFs) which were exposed to a climate of 92°C and 95% relative humidity for about 3300 h. The optical transmission stability of POFs was correlated to their thermooxidative stability. POFs possessed identical core material, poly(methyl methacrylate), but they differed in the materials used for the claddings. The optical transmission was measured online using a prototype device called multiplexer. The chemiluminescence (CL) technique was applied to characterize the thermooxidative stability and degradation of POFs. CL analysis reveals the thermooxidative degradation of bare POFs (core and cladding), predominantly of the claddings, as a result of climatic exposure. Ultraviolet-visible transmittance measurements demonstrated more changes in the claddings as compared to the cores due to degradation. The CL and optical measurements data indicated that the optical transmission stability of POFs was dependent mainly on the thermooxidative stability of the claddings and their chemical compositions. Hoboken, NJ Wiley InterScience 2007 Journal of applied polymer science 103 3 1593 1601 10.1002/app.23955 2016-02-19 OPUS4-22031 Posterpräsentation Daum, Werner Sensor Technologies for Packages, Storage, and Geological Disposal of Radioactive Waste 2010 ANDRA Workshop on Monitoring Technologies - Potential Application to Monitoring of Geological Repositories for Radioactive Waste ANDRA Workshop on Monitoring Technologies - Potential Application to Monitoring of Geological Repositories for Radioactive Waste Troyes, France 2010-06-07 2010-06-08 2016-02-19 OPUS4-23268 Vortrag Daum, Werner Sensorik und Messtechnik für die Zustandsüberwachung 2007 GESA Expertenforum 2007. Experimentelle Strukturanalyse für die Zustandsüberwachung GESA Expertenforum 2007. Experimentelle Strukturanalyse für die Zustandsüberwachung Nuremberg, Germany 2007-05-22 2007-05-24 2016-02-19 OPUS4-24042 Vortrag Daum, Werner Experimental Validation Technique for Strain Transfer Characterization of Fibre Optic Strain Sensors 2011 International Conference on Applications for Image based Measurements International Conference on Applications for Image based Measurements Ulm, Germany 2011-03-22 2011-03-23 2016-02-19 OPUS4-24043 Vortrag Daum, Werner Monitoring im Spiegelbild von Technik, Recht und Regelwerken 2011 VDI/VDE-GMA-Expertenforum Strukturmonitoring und Zustandsüberwachung 2011 - Schadensfällen vorbeugen - Instandhaltung optimieren VDI/VDE-GMA-Expertenforum Strukturmonitoring und Zustandsüberwachung 2011 - Schadensfällen vorbeugen - Instandhaltung optimieren Nuremberg, Germany 2011-06-07 2011-06-08 2016-02-19 OPUS4-24180 Beitrag zu einem Sammelband Daum, Werner Czichos, Horst; Saito, T.; Smith, L. Structural Health Monitoring - Embedded Sensors Berlin, Heidelberg Springer 2011 Springer handbook of metrology and testing 978-3-642-16640-2 932 949 2016-02-19 OPUS4-37646 Beitrag zu einem Tagungsband Bartholmai, Matthias; Werner, Klaus-Dieter; Kohlhoff, Harald; Helmerich, Rosemarie; Daum, Werner Aulova, Alexandra; Rogelj Ritonja, A.; Emri, I. Long-Term measurement of vertical displacements at the outer concrete bridges of the Berlin Main Station Berlin Main Station is the largest multi-level station in Europe. Its daily passenger number amounts to over 300.000. Structures built for such a large number of people require a high-level safety standard. The station was built on the inner city site of the historic Lehrter Bahnhof. The conditions for building and start of operation were challenging by several reasons. The typical sandy ground with a high level of groundwater makes the permanent static stability of such a complex structure difficult. Several completed, ongoing, and planned construction activities in the immediate vicinity of the station influence the ground settlement of the whole area. On basis of the structural design an impact prediction was calculated, which expected certain vertical displacements particularly between the single columns of the outer concrete bridges of the building. These columns support the glass roof construction, which only allows a defined limit of displacement. In order to avoid damage, a concept for monitoring and adjusting potentially occurring displacements was developed for installation at the outer bridges of the station. 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 166 167 2016-10-05 OPUS4-34215 Beitrag zu einem Tagungsband Heidt, Heinrich; Rose, Peter; Raabe, P.; Daum, Werner Digital image processing for radiography in nuclear power plants Grenoble 1985 Proceedings of the 7th International Conference on NDE in the nuclear industry 7th International Conference on NDE in the nuclear industry Grenoble, France 1985-01-28 1985-02-01 317 319 2016-02-20 OPUS4-34486 Beitrag zu einem Tagungsband Brandes, K.; Daum, Werner; Hofmann, Detlef; Basedau, Frank; Kubowitz, P. Innovative structural damage detection of bridges by least squares adjustment with constraints Zilina Faculty of Mechanical Engineering, Univerzity of Zilina, Slovakia 2015 32nd Danubia-Adria Symposium on advances in experimental mechanics (Proceedings) 978-80-554-1094-4 32nd Danubia-Adria Symposium on advances in experimental mechanics Starý Smokovec, Slovakia 2015-09-22 2015-09-25 18 19 2016-02-20 OPUS4-34487 Zeitschriftenartikel Richter, Frank; Köppe, Enrico; Daum, Werner Tracking deformation history in split Hopkinson pressure bar testing The stress vs. strain curve of materials is affected the rate of imposed straining. Among the methods for dynamic testing the technique known as 'split Hopkinson pressure bar' (SHPB) has evolved into the most widely used one to exert high-speed straining. The theory behind it comprises simple equations to compute stress and strain. The reliability of the strain analysis can be assessed by digital image correlation (DIC). The present results indicate that the visually observed strain is smaller than predicted by theory. Oxford Elsevier 2016 Materials Today: Proceedings 3 32nd Danubia-Adria Symposium on advances in experimental mechanics Starý Smokovec, Slovakia 22.09.2015 25.09.2015 4 1139 1143 10.1016/j.matpr.2016.03.017 2016-02-20 OPUS4-32149 Zeitschriftenartikel Daum, Werner Sensing with optical fibres Starting from the first patent of a fibre optic sensor in 1967, fibre optic sensing has become a success story throughout the world. Today, fibre optic point sensors and continuous distributed fibre optics sensor systems allow the measurement of nearly all physical quantities and contribute to higher safety levels in many industrial sectors. Monitoring of pipelines, power cables, lightweight and civil engineering structures, and of ground movements are heading the hit list of applications. Standardization in this field is of paramount relevance and brings to light some of the challenges now faced by IEC SC (Subcommittee) 86C/WG (Working Group) 2: Fibre optic sensors. Genova 2014 IEC e-tech November 1 3 2016-02-20 OPUS4-32226 Buchkapitel Czichos, Horst; Daum, Werner Grote, K.-H.; Feldhusen, J. Messtechnik und Sensorik Aufgabe der Messtechnik ist die experimentelle Bestimmung quantitativ erfassbarer Größen in Wissenschaft und Technik. Für die Ingenieurwissenschaften liefert die Mess- und Prüftechnik Unterlagen zur Optimierung der Entwicklung, Konstruktion und Fertigung von Bauteilen und technischen Systemen sowie zur Beurteilung der Eigenschaften, Funktion, Qualität und Zuverlässigkeit technischer Produkte. Berlin Heidelberg Springer-Vieweg 2014 Dubbel - Taschenbuch für den Maschinenbau - 24. Aufl. 978-3-642-38890-3 Kap. W, W2 W44 10.1007/978-3-642-38891-0 2016-02-20 OPUS4-34371 Vortrag Daum, Werner New self diagnostic fiber optical sensor technique for structural health monitoring 2015 32nd Danubia-Adria Symposium on Advances in Experimental Mechanics 32nd Danubia-Adria Symposium on Advances in Experimental Mechanics Stary Smokovec, Slovakia 2015-09-22 2015-09-25 2016-02-20 OPUS4-34793 Beitrag zu einem Tagungsband Brandes, K.; Kubowitz, P.; Daum, Werner; Hofmann, Detlef; Basedau, Frank Lagrange Multiplikator-Test zur Detektierung von zunehmender Strukturschädigung Mit einem auf Lagrange-Multipiikator-Tests basierenden Monitoring von Brücken ist es gelungen, in Belastungsversuchen an einer Holzbrücke (7,25 m Spannweite), an der relativ kleine Schädigungen künstlich herbeigeführt worden waren, die Zuverlässigkeit dieser Art des Monitorings zu bestätigen. Ausgangspunkte waren Messung von Durchbiegungen sowie Krümmungen und die Zusammenführung der jeweiligen Regression mit Nebenbedingungen, die den mechanischen Bedingungen gehorchen, unter Einschluss von Lagrange-Multiplikatoren, die sich als brauchbare Testparameter erwiesen. Dresden Technische Universität Dresden 2015 8. Symposium Experimentelle Untersuchungen von Baukonstruktionen 8. Symposium Experimentelle Untersuchungen von Baukonstruktionen Dresden, Germany 24.09.2015 24.09.2015 40 147 157 2016-02-20 OPUS4-34202 Beitrag zu einem Tagungsband Daum, Werner; Rose, Peter Automatische Isolierung von Schweissnahtfehlern in Röntgenaufnahmen aus der zerstörungsfreien Materialprüfung Berlin Kammer der Technik 1985 Kurzreferate - 1. Internationale Fachtagung Automatische Bildverarbeitung 1. Internationale Fachtagung Automatische Bildverarbeitung Berlin, Germany 1985-10-17 1985-10-18 1 4 2016-02-20 OPUS4-32644 Beitrag zu einem Tagungsband Köppe, Enrico; Hofmann, Detlef; Daum, Werner Absolut messendes EFPI-Messsystem In diesem Paper wird ein absolut messendes faseroptisches Messsystem zur Bestimmung des Gap-Abstandes von niedrig reflektierenden losen und festen extrinsischer Fabry-Pérot Interferometer (EFPI) vorgestellt. Die häufigste Methode zur Bestimmung von Dehnungen oder Bewegungen durch EFPI-Sensoren ist eine kontinuierliche relative Ermittlung einer Veränderung mit einer nachträglichen Auswertung. Unterbrechungen in der Datenerfassung oder Fehler bei der Interferenzstreifen-Auswertung führen zu einer nicht abschätzbaren Messunsicherheit. Damit war es bis dato nicht möglich, eine absolute Veränderung von eingesetzten EFPI-Sensoren zu bestimmen. Mit dem an der BAM entwickelten Verfahren, ist dies jetzt möglich, die absolute Veränderung zu bestimmen. Dieses System namens 'EFPI-Scan' wird in dem Papier dargestellt werden. VDE Verlag GmbH Informationstechnische Gesellschaft im VDE (ITG); VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA) 2014 Sensoren und Messsysteme 2014 - 17. ITG/GMA-Fachtagung 250 978-3-8007-3622-5 Sensoren und Messsysteme 2014 - 17. ITG/GMA-Fachtagung Nürnberg, Germany 03.06.2014 04.06.2014 P16.2, 1 3 2016-02-20 OPUS4-33814 Beitrag zu einem Tagungsband Habel, Wolfgang; Krebber, Katerina; Daum, Werner Peters, K.J. Standardization in fibre-optic sensing for structural safety - activities in the ISHMII and IEC Fiber-optic sensors are increasingly established in the sensor market. Their advantages have unquestionably been verified by numerous demonstrations to enhance the operational performance of aged structures or to monitor the structural behavior of safety-relevant structures or their components. However, there are some barriers in use due to a lack of extensive standardization of fiber-optic sensors. This leads very often to restraints in the user’s community. The paper shows the status in international standardization of fiber-optic sensors as well as current activities in leading institutions such as IEC and ISHMII and others with the purpose of providing relevant standards for a broader use of selected fiber-optic sensor technologies. International society for optics and photonics (SPIE) 2015 Smart sensor phenomena, technology, networks, and systems integration 2015 (Proceedings of SPIE) 9436 Smart sensor phenomena, technology, networks, and systems integration 2015 San Diego, CA, USA 08.03.2015 12.03.2015 94360S-1 94360S-7 10.1117/12.2185602 2016-02-20 OPUS4-36667 Zeitschriftenartikel Brandes, K.; Daum, Werner; Hofmann, Detlef; Basedau, Frank; Kubowitz, P. Innovative structural damage detection of bridges by least squares adjustment with constraints Long-term monitoring of bridges requires the early detection of spreading damage because very often the damage is not really visible. For many decades engineers and scientists relayed on dynamic methods especially modal ones. However, after fundamental tests by the U.S. FHWA in 1993, it became evident that more successful methods should be developed, but no innovation really happened. A substantial innovative detection method started four years ago from Lagrange Multiplier Testing which eventually resulted in experimental verification based on measurement of deflection and curvature of the bridge beam and together the methodological combination of both. Elsevier 2016 Materials Today: Proceedings 3 32nd DANUBIA ADRIA SYMPOSIUM on Advances in Experimental Mechanics Starý Smokovec – High Tatras, Slovakia 22.09.2015 25.09.2015 4 942 946 10.1016/j.matpr.2016.03.025 2016-06-24 OPUS4-35656 Beitrag zu einem Tagungsband Richter, Frank; Köppe, Enrico; Daum, Werner Tracking deformation history in split Hopkinson pressure bar testing The stress vs. strain curve of materials is affected the rate of imposed straining. Among the methods for dynamic testing the technique known as 'split Hopkinson pressure bar' (SHPB) has evolved into the most widely used one to exert high-speed straining. The theory behind it comprises simple equations to compute stress and strain. The reliability of the strain analysis can be assessed by digital image correlation (DIC). The present results indicate that the visually observed strain is smaller than predicted by theory. Zilina University of Zilina, Slovakia 2015 32nd Danubia-Adria symposium on advances in experimental mechanics (Proceedings) 978-80-554-1094-4 32nd Danubia-Adria Symposium on Advances in Experimental Mechanics Starý Smokovec, Slovakia 22.09.2015 25.09.2015 174 175 2016-04-11 OPUS4-32429 Zeitschriftenartikel Köppe, Enrico; Augustin, D.; Bartholmai, Matthias; Daum, Werner Air-based multi-hop sensor network for the localization of persons In this work an air-based sensor network for the localization of persons at extensive areas is presented. The developed network consists of a localization device which the person is wearing (BodyGuard-System), a mobile relay station in the air, and a base station. All three parts communicate with the same radio chip. The BodyGuard-System is an inertial navigation system which was developed for localization in difficult environments with high accuracy and low measurement uncertainty. To increase the range of the system, a multi-hop network was built up. The measured data of the BodyGuard-System and the mobile relay station is visualized on a PC in the base station. This multi-hop network is necessary for example for fire department missions. Amsterdam [u.a.] Elsevier 2014 Procedia engineering 87 EuroSensors 2014, 28th European Conference on Solid-State Transducers Brescia, Italy 07.09.2014 10.09.2014 528 531 urn:nbn:de:kobv:b43-324294 10.1016/j.proeng.2014.11.540 http://creativecommons.org/licenses/by-nc-nd/3.0/de/deed.de 2016-02-20 OPUS4-35173 Beitrag zu einem Tagungsband Köppe, Enrico; Bartholmai, Matthias; Daum, Werner; Gong, Xin; 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. Zilina Faculty of Mechanical Engineering, Univerzity of Zilina, Slovakia 2015 32nd Danubia-Adria Symposium on advances in experimental mechanics (Proceedings) 978-80-554-1094-4 32nd Danubia-Adria Symposium on advances in experimental mechanics Starý Smokovec, Slovakia 22.09.2015 25.09.2015 1 2 2016-02-20 OPUS4-52124 Zeitschriftenartikel Kling e Silva, L.; Almeida, G.; Kadoke, Daniel; Daum, Werner; Ribeiro Pereira, G. Automation of pipe defect detection and characterization by structured light High quality tubular products are essential to the oil and gas industry. Quality control during their production focuses on the non-destructive detection of surface defects. The structured light technique is a candidate for the challenge to detect, monitor and evaluate such defects in real-time. In the present study the automatic processing of structured light measurements is performed and validated. The algorithm for the automatic Analysis of inspection data has an advantage over current data evaluation methods based on individual assessments of operators. Berlin/ Boston Walter de Gruyter GmbH 2021 Materials Testing 63 1 55 61 10.1515/mt-2020-0008 2021-02-17 OPUS4-49780 Zeitschriftenartikel Hilgenberg, Kai; Daum, Werner; Maierhofer, Christiane; Altenburg, Simon; Bruno, Giovanni; Heckel, Thomas; Skrotzki, Birgit; Zerbst, Uwe; Kranzmann, Axel; Bettge, Dirk; Sommer, Konstantin; Seeger, Stefan; Nitsche, Michael; Günster, Jens; Evans, Alexander Additive manufacturing at the BAM: We focus on Safety In Germany, the Federal Institute for Materials Research and Testing (BAM) is addressing challenges in the implementation of additive manufacturing on the industrial landscape for safety-critical applications. Materials Park, OH, USA ASM International 2019 Advanced Materials and Processes 177 7 22 26 2019-11-27 OPUS4-43373 Vortrag Daum, Werner VDI/VDE Standardization Activities of DIC Measurement Techniques With more than 180.000 engineers and scientists VDI Association of German Engineers and VDE Association for Electrical, Electronic & Information Technologies are belonging to the major technical and scientific associations in Europe. Both organizations promote the advancement of technology and among other things by developing recognized technical regulations as national and international standards. Since 2011 Technical Committee 2.15 Optical Measuring Methods for Structure Analysis and Monitoring as a common committee of both organizations is working among other things on the development of standards for optical measuring and testing methods. The committee consists of 27 members representing industrial users, system manufacturers, research institutes and universities. Currently the committee is drafting the new standard VDI/VDE 2626 Part 1 - Optical measuring procedures - Image correlation methods - Basics and equipment, which will be introduced in this presentation. Draft VDI/VDE 2626 Part 1 describes practical acceptance and reverification procedures for the evaluation of the accuracy of optical measuring systems based on digital image correlation (DIC) methods. The document applies to DIC measurement systems used a) for full-field determination of two- or three-dimensional displacement of surfaces, and b) for full-field determination of the elongation or strain of surfaces. The standard describes quality parameters as well as methods and reference objects for their determination. The quality parameters serve to specify DIC systems, and to compare different systems. They are equally suitable a) for acceptance tests as well as b) for reverification of DIC systems within the framework of a quality management system. The acceptance test is used to determine whether the DIC system complies with the quality parameter limits specified by the manufacturer, or with contractually agreed limits by the manufacturer and user, respectively. For this test the quality parameters zero-displacement error, zero-strain error, and displacement error are defined and used. Zero-displacement error and zero-strain error describe minimum measurement uncertainties of the DIC system a user has to reckon with. They are influenced by different uncertainty contributions. The quality parameter displacement error is used to check the ability of the DIC system to determine absolute displacements within the measurement volume and to confirm the traceability of this measurement to the SI system. Reverification of DIC systems serves to ensure long-term compliance with specified limits for the quality parameters. By comparing the results of successive reverification measurements of the quality parameters used for the acceptance test, it is possible to analyze trends with respect to changes in DIC system characteristics. 2017 Annual International DIC Society Conference 2017 Barcelona, Spain 06.11.2017 09.11.2017 2017-12-11 OPUS4-43371 Beitrag zu einem Sammelband Daum, Werner; Hofmann, Detlef; Basedau, Frank; Brandes, K.; Kubowitz, P. Curbach, M.; Opitz, H.; Scheerer, S.; Hampel, T. Erweiterte Strukturabbildung von Brücken mit adaptiven mathematischen Modellen zur Lösung aktueller noch ungelöster Probleme Health monitoring von größeren Strukturen erfordert die Betrachtung der gesamten Struktur, indem sowohl jener Bereich, der experimentell behandelt wird, als auch derjenige, der einer analytischen mechanischen Untersuchung unterzogen wird, in einem Gesamtzusammenhang erfasst wird. Die umfassende Behandlung des Problems gelingt dann in einer Gesamtmatrix, die im Beitrag vorgestellt wird. Auf eine Erweiterung der Methode zur Detektierung anwachsender Schädigungen wird hingewiesen. Dresden Institut für Massivbau, TU Dresden 2017 9. Symposium Experimentelle Untersuchungen von Baukonstruktionen Konstruktiver Ingenieurbau Dresden 43 183 188 urn:nbn:de:bsz:14-qucosa-201229 http://creativecommons.org/licenses/by/3.0/de/deed.de 2017-12-11 OPUS4-47344 Vortrag Daum, Werner Zerstörungsfreie Prüfung von AM Komponenten - Ein Überblick Der Vortag erläutert typische Fehlstellen und Inhomogenitäten, die bei der additiven Fertigung entstehen können. Weiterhin wird über den aktuellen Stand der herstellungsbegleitenden zerstörungsfreien Prüfung und der zerstörungsfreien Prüfung fertiger AM-Komponenten berichtet. 2019 3. ROUND TABLE - Additiv gefertigte Druckgeräte aus metallischen Werkstoffen Frankfurt a.M., Germany 22.01.2019 22.01.2019 2019-02-11 OPUS4-47132 Buchkapitel Daum, Werner; Czichos, Horst Grote, Karl-Heinrich; Bender, Beate; Göhlich, Dietmar Messtechnik und Sensorik Für den allgemeinen Maschinenbau wichtige Messtechnik und Sensorik werden grundlegend und anwendungsbezogen beschrieben. 25 Berlin Springer Vieweg 2018 DUBBEL - Taschenbuch für den Maschinenbau 978-3-662-54804-2 W 2 W 44 10.1007/978-3-662-54805-9 2019-01-04 OPUS4-42109 Beitrag zu einem Tagungsband Bartholmai, Matthias; Werner, Klaus-Dieter; Johann, Sergej; Daum, Werner Cosmi, F. Characterization of the temperature behavior of a piezoresistive accelerometer Piezoresistive accelerometers use a strain-sensing element, generally made of semiconductor material, e.g., silicon to convert the mechanical motion into an electrical signal. This element is usually designed in form of a cantilever beam loaded with a mass. Acceleration causes bending of the beam, which produces a change of electrical resistance proportional to the applied acceleration. Main advantages of piezoresistive accelerometers in comparison to other types, e.g., piezoelectric and capacitive, is their robust and highly dynamic behavior, which qualifies them for application in high impact shock applications. Mechanical damping is typically implemented with silicon oil in a way that the output signal is undistorted over a wide frequency range. These characteristics principally qualify them for the application in drop tests carried out at BAM, for which they are calibrated over the frequency range from 1 to 4 kHz. However, using silicon oil for damping, has the drawback of temperature dependent change of its viscosity, leading to temperature dependent deviation of the accelerometer's sensitivity. This study presents experimental results of the temperature behavior of a piezoresistive accelerometer with a dynamic range up to ±5000 g. This type of accelerometer is applied for drop tests which are partially performed at temperatures of -40 or +100 °C. Trieste University of Trieste, Italy 2017 34rd Danubia - Adria Symposium on Advances in Experimental Mechanics - Book of proceedings 978-88-8303-863-1 34th Danubia-Adria Symposium on Advances in Experimental Mechanics Trieste, Italy 19.09.2017 22.09.2017 93 95 2017-09-25