TY - CONF A1 - Bartelmeß, Jürgen A1 - Gawlitza, Kornelia A1 - Bartholmai, Matthias A1 - Rurack, Knut A1 - Kohlhoff, Harald A1 - Kraus, Werner A1 - Mansurova, Maria A1 - Bell, Jérémy T1 - Developments towards the fluorescence based sensing of hazardous gases N2 - Fluorescence based sensing is a versatile approach for the trace analysis outside of the laboratory, requiring suitable sensor materials and their integration into sensing devices. The versatility of fluorophores as probes, especially in terms of the possibility to tailor their optical as well as their recognition properties by synthetic modifications in a wide range, renders them a superior active component for the preparation of optical sensor devices. Recent works at BAM in this field include, for example, the detection of nerve gas agents, illustrating impressively the aforementioned benefits of fluorophores in optical sensing applications. In the interdisciplinary approach presented here, we target hazardous gases such as ammonia, benzene, and hydrogen sulfide, next to others, which pose a major threat to human health and environmental safety and for which the availability of a sensitive and reliable detection method is highly desirable. The dyes presented follow a “turn-on” fluorescence schematic which allows for the selective and sensitive detection of the respective gaseous analyte. The immobilization of the probe in polymeric matrices is then the next step toward the fabrication of a prototype device for molecular sensing. T2 - Colloquium of Optical Spectrometry (COSP) 2017 CY - Berlin, Germany DA - 27.11.2017 KW - Gas sensing KW - Fluorescence KW - KonSens PY - 2017 AN - OPUS4-43209 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bartelmeß, Jürgen A1 - Zimmek, David A1 - Bartholmai, Matthias A1 - Strangfeld, Christoph A1 - Schäferling, M. T1 - Fibre optic ratiometric fluorescence pH sensor for monitoring corrosion in concrete N2 - In this communication a novel concept for pH sensing is introduced which is specifically adapted to monitor carbonation induced corrosion in concrete structures. The method is based on a ratiometric measurement principle, exploiting the pH sensitive colour switching of thymol blue in the basic pH regime and the emissive properties of two different (Zn)CdSe/ZnS core shell quantum dots. The transition point of thymol blue in a Hydrogel D4 matrix was determined to be at around pH 11.6, which fits ideally to the intended application. Next to the fundamental spectroscopic characterization of the ratiometric response, a new design for a sensor head, suitable for the incorporation into concrete matrices is presented. Toward this, a manufacturing process was developed which includes the preparation of a double layer of polymers containing either thymol blue or a quantum dot mixture inside a porous ceramic tube. Results of a proof-of-priciple performance test of the sensor head in solutions of different pH and in cement specimens are presented, with encouraging results paving the way for future field tests in concrete. KW - Fiber optic sensing KW - PH monitoring in concrete KW - Embedded sensors KW - Ratiometric fluorescence PY - 2020 U6 - https://doi.org/10.1039/c9an02348h VL - 145 IS - 6 SP - 2111 EP - 2117 PB - Royal Society of Chemistry AN - OPUS4-50381 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - THES A1 - Bartholmai, Matthias T1 - Flammschutz von polymeren Baustoffen: Bewertung von Konzepten auf der Basis von Small-scale Cone Calorimeter Untersuchungen N2 - Flammschutz von polymeren Baustoffen: Bewertung von Konzepten auf der Basis von small- scale Cone Calorimeter Untersuchungen. In der Arbeit wurden zwei unterschiedliche Flammschutzkonzepte polymerer Baustoffe mit Hilfe des Cone Calorimeter untersucht und bewertet. Polymer-Schicht-Nanocomposites sind ein neues Konzept für flammgeschützte Werkstoffe, die aus einer Polymermatrix und der Zugabe eines nanoskaligen Schichtsilikat- Additivs von ca. 5 Gew.-% bestehen. Im Brandfall bilden die Schichtsilikate eine Barriere, die den Wärmetransport in das Material bzw. den Stofftransport der Pyrolysegase aus dem Material hemmt. Mit einem Modellsystem wurde gezeigt, dass dieser Barriereeffekt das Brandverhalten hinsichtlich der Flammenausbreitung verbessert, in anderen Brandszenarien aber wirkungslos bleibt. Die Ergebnisse der Cone Calorimeter Untersuchungen wurden mit denen der Entflammbarkeitstests UL 94 und LOI verglichen. Eine Korrelation in Richtung kleiner Probendimensionen (downscale) und in Richtung Phase der Brandentstehung wurde aufgezeigt. Die Anwendung intumeszierender Beschichtungen auf Bauteile verschiedener Art, wie z. B. tragende Stahlkonstruktionen, ist ein etabliertes Brandschutzkonzept. Das intumeszierende Polymermaterial schäumt unter Wärmeeinwirkung auf und bildet eine wärmeisolierende Schicht. Zur Bewertung der Wirkungsweise dieses Polymermaterials wurde ein auf Temperaturmessungen basierendes Verfahren mit dem Cone Calorimeter und für Simulationsrechnung entwickelt. Die Ergebnisse wurden mit denen aus Kleinprüfstanduntersuchungen verglichen. Eine Korrelation in Richtung großer Probendimensionen (upscale) und in Richtung der Phase des voll entwickelten Brandes konnte bis zu einer Temperaturgrenze gezeigt werden. N2 - Objective of this thesis was the investigation and evaluation of two different concepts of flame-retarding polymeric building materials. In the centre of this concern is the cone calorimeter as a versatile device in the field of flame retardancy and burning behaviour of materials and constructions. The cone calorimeter is characterized by a medium sample dimension (100 x 100 mm2). It simulates the phase of flame spread of a real burning process. The capabilities of the sample materials were of interest as well as the potentials and limitations of the investigation method. The scientific significance of cone calorimeter results was analysed in terms of different fire Scenarios and sample dimensions. Polymer Layered Silicate Nanocomposites are a new concept of flame retarding materials consisting of a polymer matrix and the addition of about 5 wt.-% nanoscale clay. In the case of a fire the clay layers built up a barrier, which hinders the heat transport into the sample and the mass transport of pyrolysis gases out of the material. Using a model system it was shown, that this barrier effect results in an essential improvement in burning behaviour in terms of flame spread but was ineffective for different fire scenarios and phases of burning, respectively. The results of cone calorimeter measurements were compared to results of the flammability tests UL 94 and LOI. A correlation towards smaller sample dimensions (downscale) and towards the phase of flammability was shown. The application of intumescent coatings on different structural members like supporting steel constructions is an established concept of fire retardancy. The intumescent polymeric material swells under thermal impact and forms a heat insulating layer. A method combining temperature measurement using the cone calorimeter and Computer simulation was developed, by which the fire protective effect could be evaluated. Investigation results were compared to results of small scale test furnace measurements. A correlation towards larger sample dimensions (upscale) and towards the phase of a fully developed fire could be shown up to a limitation by temperature. T3 - BAM Dissertationsreihe - 22 KW - Flammschutz KW - Small-scale Cone Calorimeter Untersuchungen KW - polymeren Baustoffen PY - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-1366 SN - 978-3-86509-652-4 SN - 1613-4249 VL - 22 SP - 1 EP - 181 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-136 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Schartel, Bernhard T1 - Comprehensive Fire Behaviour Assessment of Nanocomposites T2 - 9th European Meeting on Fire Retardancy and Protection of Materials, FRPM '03 CY - Lille, France DA - 2003-09-17 PY - 2003 AN - OPUS4-4615 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Goedecke, Thomas A1 - Linden, G. A1 - Winter, R. T1 - Warnsystem fährt mit! Transport gefährlicher Güter mit RFID-Technologie sicherer machen T2 - 2. Gefahrgut- und Sicherheitstag Rheinland CY - Grevenbroich, Germany DA - 2013-04-18 PY - 2013 AN - OPUS4-28478 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. A1 - Kohlhoff, Harald A1 - Daum, Werner T1 - Multi-Sensor Systems for Safety-Related Monitoring T2 - AMA Conferences 2013 CY - Nuremberg, Germany DA - 2013-05-14 PY - 2013 AN - OPUS4-28503 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Goedecke, Thomas T1 - Überwachung von Gefahrguttransporten durch RFID-Tags mit Sensorintegration T2 - WTT-Kooperationsforum zum Thema Wireless-Anwendungen, RFID- und NFC-Technologien CY - Berlin, Germany DA - 2013-06-13 PY - 2013 AN - OPUS4-28671 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Schartel, Bernhard T1 - A new approach for assessing the performance of intumescent coatings T2 - 10th European Meeting on Fire Retardancy and Protection of Materials (10th European Conference on Fire Retardant Polymers), FRPM '05, BAM CY - Berlin, Germany DA - 2005-09-07 PY - 2005 AN - OPUS4-6363 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias T1 - Flammschutz von polymeren Baustoffen: Bewertung von Konzepten auf der Basis von Cone Calorimeter Untersuchungen T2 - Polymerwissenschaftliches Seminar der TU Berlin, Fachgebiet Polymertechnik/Polymerphysik von Prof. M.H. Wagner CY - Berlin, Germany DA - 2005-01-26 PY - 2005 AN - OPUS4-6367 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico A1 - Werner, Klaus-Dieter A1 - Homfeld, Stefan-Daniel T1 - Funkbasiertes Sensornetzwerk zur Schadensfrüherkennung an Bauwerken T2 - Wireless Automation 2008 CY - Berlin, Germany DA - 2008-02-28 PY - 2008 AN - OPUS4-16714 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico T1 - Schadensfrüherkennung an Bauwerken mittels selbstorganisierendem Funksensornetzwerk T2 - VDI/VDE-Expertenforum Strukturmonitoring 2008 CY - Nuremberg, Germany DA - 2008-05-06 PY - 2008 AN - OPUS4-17520 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias T1 - Flammschutz von polymeren Baustoffen: Bewertung von Konzepten auf der Basis von Small-Scale Cone Calorimeter Untersuchungen T2 - Wissenschaftliche Aussprache, Technische Universität Berlin CY - Berlin, Germany DA - 2006-10-23 PY - 2006 AN - OPUS4-14692 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico A1 - Kammermeier, Michael A1 - Werner, Klaus-Dieter T1 - Funkbasiertes Sensornetzwerk zur Schadensfrüherkennung an Bauwerken T2 - VDI-Tagung Sensoren und Messsysteme 2008 CY - Ludwigsburg, Germany DA - 2008-03-11 PY - 2008 AN - OPUS4-17324 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias T1 - Funkbasiertes Sensornetzwerk zur Schadensfrüherkennung an Bauwerken T2 - BAM-Kolloquium CY - Berlin, Germany DA - 2008-12-03 PY - 2008 AN - OPUS4-20194 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico T1 - Wireless Sensor Network for Long-Term Structural Health Monitoring of Buildings and Infrastructures T2 - 4th International Conference on Structural Health Monitoring on Intelligent Infrastructure (SHMII-4) 2009 CY - Zurich, Switzerland DA - 2009-07-22 PY - 2009 AN - OPUS4-20195 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico T1 - Bauwerke unter Beobachtung. Funkbasiertes Sensornetzwerk zur Schadensfrüherkennung an Bauwerken T2 - Hannover-Messe CY - Hanover, Germany DA - 2010-04-19 PY - 2010 AN - OPUS4-22058 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Pettelkau, Alexander A1 - Goedecke, Thomas A1 - Daum, Werner A1 - Farahbakhsh, Mahin A1 - Hohendorf, Stefan A1 - Damm, David T1 - Sicherung von Gefahrguttransporten durch RFID-Tags. Das Projekt SIGRID: Sensorfunktionalität mit integrierter Datenbank-GEFAHRGUT-Information T2 - 22. Münchner Gefahrgut-Tage CY - Munich, Germany DA - 2012-05-14 PY - 2012 AN - OPUS4-26804 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Prager, Jens A1 - Köppe, Enrico T1 - Früherkennung von Strukturschäden mittels geführter Lamb-Wellen T2 - Sensor + Test 2012 CY - Nuremberg, Germany DA - 2012-05-22 PY - 2012 AN - OPUS4-26797 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Prager, Jens A1 - Köppe, Enrico T1 - Early damage detection of structural defects using guided waves T2 - 6th European Workshop on Structural Health Monitoring - Structural Health Monitoring 2012 CY - Dresden, Germany DA - 2012-07-03 PY - 2012 AN - OPUS4-26800 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. T1 - Multifunctional Sensor for Monitoring of CO2 Underground Storage by Comprehensive and Spatially Resolved Measuring of Gas Concentrations, Temperature, and Structural Changes T2 - Greenhouse Gas Control Technologies (GHGT-11) Conference CY - Kyoto, Japan DA - 2012-11-18 PY - 2012 AN - OPUS4-26885 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico A1 - Liehrs, A. A1 - Schiller, J. T1 - Radio-Based Multi-Sensor for Person Tracking and Indoor Positionin T2 - 9th Workshop on Positioning, Navigation and Communication 2012 (WPNC '12) CY - Dresden, Germany DA - 2012-03-15 PY - 2012 AN - OPUS4-26454 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. A1 - Köppe, Enrico T1 - Monitoring of Hazardous Scenarios using Multi-Sensor-Devices T2 - Sensordevices 2013 CY - Barcelona, Spain DA - 2013-08-25 PY - 2013 AN - OPUS4-29803 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias T1 - Fire Science - Prevention, Assessment and Containment of Hazards using Sensors and NDT-Methods T2 - BAM-Workshop Fire Science CY - Berlin, Germany DA - 2013-11-29 PY - 2013 AN - OPUS4-30734 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Lazik, D. A1 - Neumann, Patrick P. A1 - Ebert, Sebastian T1 - Pipeline Monitoring with Linear Gas Sensors T2 - 9th Pipeline Technology Conference 2014 CY - Berlin, Germany DA - 2014-05-12 PY - 2014 AN - OPUS4-30735 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. A1 - Ebert, Sebastian A1 - Werner, Klaus-Dieter A1 - Lazik, D. T1 - Linear Sensor for Areal Subsurface Gas Monitoring - Calibration Routine and Validation Experiments T2 - IEEE Sensors 2014 CY - Valencia, Spain DA - 2014-11-03 PY - 2014 AN - OPUS4-32043 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Stoppel, Markus T1 - Two Application Examples of RFID Sensor Systems - Identification and Diagnosis of Concrete Components and Monitoring of Dangerous Goods Transports T2 - 13th IMEKO TC10 Workshop on Technical Diagnostics CY - Warsaw, Poland DA - 2014-06-26 PY - 2014 AN - OPUS4-30931 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Werner, Klaus-Dieter A1 - Kammermeier, Michael T1 - Hopkinson Bar method for temperature dependent testing and calibration of accelerometers T2 - 31st Danubia Adria Symposium on Advances in Experimental Mechanics CY - Kempten, Germany DA - 2014-09-24 PY - 2014 AN - OPUS4-31543 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Werner, Klaus-Dieter A1 - Kammermeier, Michael T1 - Temperaturabhängige Prüfung von Beschleunigungsaufnehmern für stoßartige Beanspruchungen N2 - Motivation: - Beschleunigungsaufnehmer (BA) sind in ihrer Funktion und in ihren Messeigenschaften stark temperaturabhängig - kritisch ist z. B. der Dämpfungsmechanismus der seismischen Masse piezoelektrischer BA - Anwendung: z. B. Fallversuche mit spezifischer Temperaturvorgabe (- 40 °C, + 100 °C) - Entwicklung eines geeigneten Prüfverfahrens zur temperaturabhängigen Untersuchung von BA T2 - 15. ITG-/GMA-Fachtagung "Sensoren und Messsysteme 2010"/Messe "Sensor + Test 2010" CY - Nuremberg, Germany DA - 18.05.2010 PY - 2010 AN - OPUS4-22021 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico T1 - Funksensornetzwerk zur Strukturüberwachung und Schadensfrüherkennung an Bauwerken T2 - VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA): Expertenforum "Verteilte Messsysteme 2010" CY - Braunschweig, Germany DA - 2010-03-24 PY - 2010 AN - OPUS4-21995 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Köppe, Enrico A1 - Neumann, Patrick P. T1 - Sensor Technologies and Electronic Systems T2 - KCESS 2011, Kuwait Conference on e-Services and e-Systems CY - Kuwait City, Kuwait DA - 2011-04-05 PY - 2011 AN - OPUS4-24038 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Werner, Klaus-Dieter T1 - Langzeitmonitoring am Berliner Hauptbahnhof N2 - Problemstellung: - größter Turmbahnhof Europas - Bau auf nachgiebigem Sandboden - weitere Baumaßnahmen in unmittelbarer Nähe - Setzungen und Hebungen der Brückenfundamente - resultierende Beanspruchungen der Konstruktion - Erfassung der Beanspruchungen und Verformungen während Bau und Betrieb - Möglichkeit der Nachstellung der Gabelstützen T2 - VDI/VDE-Expertenforum im Rahmen der Messe "Sensor und Test 2011" CY - Nuremberg, Germany DA - 07.06.2011 PY - 2011 AN - OPUS4-24040 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. A1 - Ebert, Sebastian A1 - Lazik, D. T1 - Comprehensive Monitoring of Structures for Gas Transport and Storage using Linear Multi-Sensors T2 - World Congress of Smart Materials 2015 (WCSM-2015) CY - Busan, Korea DA - 2015-03-23 PY - 2015 AN - OPUS4-32930 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Stoppel, Markus T1 - RFID-Sensor-Systeme zur bauteilintegrierten Überwachung von Betonkomponenten T2 - VDI/VDE-GMA-Fachausschuss 2.12 "Strukturanalyse und -überwachung in der Bautechnik" CY - Hannover, Germany DA - 2015-09-10 PY - 2015 AN - OPUS4-34073 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Kammermeier, Michael A1 - Wilk, T. A1 - Werner, Klaus-Dieter T1 - High dynamic measurement of strain and acceleration using a multichannel measuring system with single cable serial connection T2 - 32nd Danubia-Adria Symposium on Advances in Experimental Mechanics CY - Stary Smokovec, Slovakia DA - 2015-09-22 PY - 2015 AN - OPUS4-34367 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Ebert, Sebastian A1 - Neumann, Patrick P. A1 - Noske, Reinhard A1 - Rehak, W. A1 - Lazik, D. T1 - Linear Gas Sensor for Methane Based on a Selectively Permeable Membrane T2 - AMA SENSOR Conference 2015 CY - Nuremberg, Germany DA - 2015-05-19 PY - 2015 AN - OPUS4-33223 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Strangfeld, Christoph T1 - Chances and limitations of RFID sensor systems – practical experiences from research projects with different application scenarios N2 - The combination of Radio-frequency identification (RFID) and low energy sensors offers promising chances to implement cost effective, easy to apply, and easy to handle sensor systems for a variety of applications. The RFID technology is already well established in logistics. Enhanced processing and interface capabilities enable the integration of various sensors for control, diagnostics, and monitoring tasks. In the scope of research projects carried out at the Federal Institute for Materials Research and Testing (BAM), RFID sensor systems were developed and validated with regard to two different application scenarios: the Identification and diagnosis of concrete components for road bridges and the monitoring of dangerous goods transportation. This contribution presents selected research results and reflects the practical experiences on future chances and limitations of RFID sensor systems. T2 - IDTechEx Show! Europe 2016 CY - Berlin, Germany DA - 27.04.2016 KW - RFID Sensors systems KW - Diagnosis of concrete components KW - Monitoring of dangerous goods PY - 2016 AN - OPUS4-36034 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Kammermeier, Michael A1 - Müller, Maximilian A1 - Strangfeld, Christoph T1 - Transmission characteristics of RFID sensor systems embedded in concrete N2 - Completely embedded sensor systems for long-term operation offer innovative possibilities for structural health monitoring of concrete structures. Measuring of relevant parameters, e.g., temperature, humidity, or indication of corrosion can be performed with low energy sensors. This allows to implement passive RFID sensor systems without cable connection and battery, which are power supplied exclusively by the electromagnetic field from the external reader device. To evaluate characteristics and conditions of this concept, a systematical investigation of the transmission characteristics with variation of relevant parameters, as communication frequency, installation depth, type of concrete, moisture content, etc. is currently carried out in an interdisciplinary Research project at BAM. First results are presented in this paper. T2 - IEEE Sensors 2016 CY - Orlando, FL, USA DA - 30.10.2016 KW - Embedded sensors KW - Energy harvesting KW - Wireless sensors KW - RFID sensors KW - Transmission characteristics KW - Structural health monitoring PY - 2016 AN - OPUS4-38387 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Werner, Klaus-Dieter T1 - Temperature characteristics of a piezoresistive accelerometer for high impact shock application N2 - This study presents the characterization of a piezoresistive accelerometer damped with silicon oil for the application in drop tests carried out at BAM. Experiments were performed with the Hopkinson Bar method in close correlation to the real-world application conditions. The results point out certain limitations regarding the temperature influence and the frequency response. Additional experiments were performed with a gas damped type of piezoresistive accelerometer, which has superior specifications, particularly for low temperatures. The results allow for a comparison. T2 - Sensoren und Messsysteme CY - Nürnberg, Germany DA - 26.06.2018 KW - Piezoresistive accelerometer KW - Hopkinson bar KW - High impact shock application KW - Temperature characteristics KW - Drop test PY - 2018 AN - OPUS4-45322 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias ED - Werner, Klaus-Dieter T1 - Temperature characteristics of a piezoresistive accelerometer for high impact shock application N2 - This study presents the characterization of a piezoresistive accelerometer damped with silicon oil for the application in drop tests carried out at BAM. Experiments were performed with the Hopkinson Bar method in close correlation to the real-world application conditions. The results point out certain limitations regarding the temperature influence and the frequency response. Additional experiments were performed with a gas damped type of piezoresistive accelerometer, which has superior specifications, particularly for low temperatures. The results allow for a comparison. T2 - Sensoren und Messsysteme CY - Nürnberg, Germany DA - 26.06.2018 KW - Piezoresistive accelerometer KW - High impact shock application KW - Drop test KW - Temperature characteristics KW - Hopkinson bar PY - 2018 SN - 978-3-8007-4683-5 SN - 0932-6022 SP - 465 EP - 467 PB - VDE Verlag GmbH CY - Berlin AN - OPUS4-45323 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Werner, Klaus-Dieter A1 - Kammermeier, Michael A1 - Köppe, Tabea T1 - Multichannel Measuring of Strain and Acceleration during High Impact Drop Tests with a Single Cable System T2 - 17. ITG/GMA-Fachtagung Sensoren und Messsysteme 2014 CY - Nuremberg, Germany DA - 2014-06-03 PY - 2014 N1 - Geburtsname von Köppe, Tabea: Wilk, T. - Birth name of Köppe, Tabea: Wilk, T. AN - OPUS4-30822 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Hüllmann, Dino A1 - Neumann, Patrick P. A1 - Scheuschner, Nils A1 - Lilienthal, A.J. T1 - Experimental Validation of the Cone-Shaped Remote Gas Sensor Model N2 - Remote gas sensors mounted on mobile robots enable the mapping of gas distributions in large or hardly accessible areas. A challenging task, however, is the generation of threedimensional distribution maps from these gas measurements. Suitable reconstruction algorithms can be adapted, for instance, from the field of computed tomography (CT), but both their performance and strategies for selecting optimal measuring poses must be evaluated. For this purpose simulations are used, since, in contrast to field tests, they allow repeatable conditions. Although several simulation tools exist, they lack realistic models of remote gas sensors. Recently, we introduced a model for a Tunable Diode Laser Absorption Spectroscopy (TDLAS) gas sensor taking into account the conical shape of its laser beam. However, the novel model has not yet been validated with experiments. In this paper, we compare our model with a real sensor device and show that the assumptions made hold. T2 - IEEE Sensors 2019 CY - Montreal, Canada DA - 27.10.2019 KW - Remote gas sensor model KW - TDLAS KW - Gas dispersion simulation PY - 2019 AN - OPUS4-49549 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Strangfeld, Christoph T1 - Embedded wireless sensor systems for long-term SHM and corrosion detection in concrete components N2 - State-of-the-art communication standards like RFID and Bluetooth Low Energy enable the development of sensor systems which can be completely embedded into concrete components for long-term SHM and early damage detection. Objective of the project KonSens which is carried out at BAM is the development, implementation, and validation of sensors for measuring of Parameters relevant for corrosion, like moisture, pH value, and electrical conductivity, inside steel reinforced concrete components. The primarily addressed application is detection and evaluation of corrosion processes in concrete bridges. In contrast to cable connected sensors, embedded wireless sensors avoid any pathways for Intrusion of moisture and chemicals, e.g., chlorides which could trigger corrosion activity. To allow for long-term, ideally life-time operation, the once embedded sensor systems must work highly energy efficient. One option are passive RFID sensor systems, which work without battery. The energy is transmitted to the system through the electromagnetic field, even to operate sensors. A crucial parameter is the transmission depth in concrete. First experiments with RFID sensors working at frequencies of 13.56 MHz (HF) and 868 MHz (UHF)embedded in concrete specimen resulted positive for transmission depths of up to 13 cm, which is quite promising, considering that corrosion would appear first at the top level of rebars. A second generation of passive RFID sensor systems has been implemented with improved antenna design. Current experiments using these systems focus on the transmission characteristics in terms of transmission depths and the impact of concrete moisture. Low-energy humidity sensors are used and analysed regarding their capability for measuring the material moisture. Additionally, a relation between transmitted power to the embedded sensor and the moisture content of the concrete specimen caused by energy absorption can be presumed and is under systematic investigation. T2 - Structural Health Monitoring of Intelligent Infrastructure Conference 2017 CY - Brisbane, Australia DA - 05.12.2017 KW - RFID sensors KW - Structural health monitoring KW - Sensors in concrete KW - Smart structures PY - 2017 AN - OPUS4-43491 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Werner, Klaus-Dieter T1 - Comparison of the Temperature Behavior of Oil and Gas Damped Piezoresistive Accelerometers N2 - This study presents the characterization of a piezoresistive accelerometer damped with silicon oil for the application in drop tests carried out at BAM. Experiments were performed with the Hopkinson Bar method in close correlation to the real-world application conditions. The results point out certain limitations regarding the temperature influence and the frequency response. Additional experiments were performed with a gas damped type of piezoresistive accelerometer, which has superior specifications, particularly for low temperatures. The results allow for a comparison. T2 - IEEE SENSORS 2018 CY - Neu Delhi, Indien DA - 28.10.2018 KW - Accelerometer KW - Temperature behavior KW - Frequency response KW - Hopkinson Bar KW - Drop test PY - 2018 AN - OPUS4-46484 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Ebert, Sebastian A1 - Neumann, Patrick P. A1 - Noske, Reinhard A1 - Rehak, W. A1 - Lazik, D. T1 - Linear gas sensor for methane based on a selectively permeable membrane N2 - In preliminary work, gas sensors in linear form based on the measuring principle of gas selective permeability through a membrane were developed and introduced for the detection and quantification of gas concentrations. In this study, first experimental results are presented for adapting the technology for measuring methane (CH4). A material with suitable selective permeability was identified and utilized in a sensor setup containing the gas selective membrane and a reference membrane, both integrated in a measuring cell, to which a gas stream with defined CH4 concentrations was applied. The results prove the sensor's capability for measuring methane and indicate further application potential of the method, e.g., as a robust field monitoring technology, since CH4 is the major component of natural gas, town gas, and fracking gas. T2 - AMA Conferences 2015 with SENSOR and IRS2 CY - Nuremberg, Germany DA - 19.05.2015 KW - Selective permeability KW - Quantification of gas concentrations KW - Spatially distributed monitoring KW - Gas storage sites KW - Methane measuring PY - 2015 SN - 978-3-9813484-8-4 U6 - https://doi.org/10.5162/sensor2015/P8.1 SP - 833 EP - 835 AN - OPUS4-33263 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bartholmai, Matthias A1 - Goedecke, Thomas T1 - Ständig überwacht N2 - Mit dem Projekt SIGRID will die BAM Transpondertechnik für Gefahrguttransporte nutzbar machen. KW - Gefahrgut KW - RFID KW - BAM Datenbank Gefahrgut KW - Monitoring KW - Ladungssicherung PY - 2012 SN - 0944-6117 VL - 1 SP - 18 EP - 19 PB - Vogel CY - München AN - OPUS4-25324 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Strangfeld, Christoph A1 - Müller, Maximilian A1 - Mieller, Björn T1 - RFID sensor systems embedded in concrete – validation experiments for long-term monitoring N2 - Structural Health Monitoring (SHM) is an important part of buildings surveillance and maintenance to detect material failure as early as possible and to contribute in protection of structures and their users. The implementation of Radio Frequency Identification (RFID) sensor systems without cable connection and battery into building components offers innovative possibilities to enable long-term in-situ SHM of addressed structures, bridges. The objectives of the presented study are complete embedding of RFID sensors systems in concrete, full passive communication with the systems, at best for the whole life span of structures. One challenge for this task is the highly alkaline environment in concrete, which requires non-degrading and robust encapsulation. Further Requirements are passive communication and energy supply, appropriate antenna design, placement and fixation in concrete, and the selection and implementation of sensors and connections. The concept is to develop and optimize a simple and robust system, which meets the requirements, as well as comprehensive validation in concrete specimen and real world applications. Two different systems were developed (HF and UHF RFID, respectively). First tasks were the implementation of analog sensors using the superposition principle for the signal adaption. Investigation of suitable materials for robust encapsulation and sensor protection against basic environments. Four materials were investigated in pH 13 solution for 14 days - 3D-Printer-Polymer was completely resolved - PVC has no noticeable decrease in weight - (VitaPro) glass filter for the sensor protector, has weight loss 2.7 % - The epoxy resin has increased by 1.8 % due to moisture expansion Different concrete samples were prepared for the validation of the systems. RFID sensors were embedded in different integration depths. Investigate the energy- and data transfer through concrete, also with varying moisture content. Additionally, signal strength data was used to optimize and validate the antenna characteristics in concrete. Next steps are to guarantee a sufficient energy supply for UHF RFID systems embedded in different concrete mixtures and further embedding the HF and UHF RFID systems in real bridges and buildings to validate the long term monitoring. T2 - DGZfP-Jahrestagung 2017 CY - Koblenz, Germany DA - 22.05.2017 KW - RFID sensors KW - Long-term requirements KW - Structural health monitoring KW - Passive RFID KW - Sensor requirements KW - Sensors in concrete KW - Smart structures PY - 2017 AN - OPUS4-40348 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Kammermeier, Michael A1 - Müller, Maximilian A1 - Strangfeld, Christoph T1 - RFID sensor systems embedded in concrete – systematical investigation of the transmission characteristics N2 - Long-term completely embedded sensor systems offer innovative possibilities for structural health monitoring of concrete structures. Measuring of relevant parameters, e.g., temperature, humidity, or indication of corrosion can be performed with low energy sensors. This allows to implement passive RFID sensor systems without cable connection and battery, which are power supplied exclusively by the electromagnetic field from the external reader device. To evaluate characteristics and conditions of this concept, a systematical investigation of the transmission characteristics with variation of relevant parameters, as communication frequency, installation depth, type of concrete, moisture content, etc. is currently carried out in an interdisciplinary research project at BAM. First results are presented in this paper. T2 - 8th European Workshop On Structural Health Monitoring CY - Bilbao, Spain DA - 05.07.2016 KW - Structural health monitoring KW - Embedded sensor KW - Energy harvesting KW - Wireless sensors KW - RFID sensors KW - Transmission characteristics PY - 2016 SP - 1 EP - 5 AN - OPUS4-37129 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Kammermeier, Michael A1 - Müller, Maximilian A1 - Strangfeld, Christoph T1 - Transmission characteristics of RFID sensor systems embedded in concrete N2 - Completely embedded sensor systems for long-term operation offer innovative possibilities for structural health monitoring of concrete structures. Measuring of relevant parameters, e.g., temperature, humidity, or indication of corrosion can be performed with low energy sensors. This allows to implement passive RFID sensor systems without cable connection and battery, which are power supplied exclusively by the electromagnetic field from the external reader device. To evaluate characteristics and conditions of this concept, a systematical investigation of the transmission characteristics with variation of relevant parameters, as communication frequency, installation depth, type of concrete, moisture content, etc. is currently carried out in an interdisciplinary research project at BAM. First results are presented in this paper. T2 - IEEE Sensors 2016 CY - Orlando, FL, USA DA - 30.10.2016 KW - Embedded sensors KW - Energy harvesting KW - Wireless sensors KW - RFID sensors KW - Transmission characteristics KW - Structural health monitoring PY - 2016 SN - 978-1-4799-8287-5 SN - 1930-0395 SP - 1541 EP - 1543 PB - IEEE AN - OPUS4-38388 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Strangfeld, Christoph ED - Chan, T. ED - Mahini, S, T1 - Embedded wireless sensor systems for long-term SHM and corrosion detection in concrete components N2 - State-of-the-art communication standards like RFID and Bluetooth Low Energy enable the development of sensor systems which can be completely embedded into concrete components for long-term SHM and early damage detection. Objective of the project KonSens which is carried out at BAM is the development, implementation, and validation of sensors for measuring of Parameters relevant for corrosion, like moisture, pH value, and electrical conductivity, inside steel reinforced concrete components. The primarily addressed application is detection and evaluation of corrosion processes in concrete bridges. In contrast to cable connected sensors, embedded wireless sensors avoid any pathways for intrusion of moisture and chemicals, e.g., chlorides which could trigger corrosion activity. To allow for long-term, ideally life-time operation, the once embedded sensor systems must work highly energy efficient. One option are passive RFID sensor systems, which work without battery. The energy is transmitted to the system through the electromagnetic field, even to operate sensors. A crucial parameter is the transmission depth in concrete. First experiments with RFID sensors working at frequencies of 13.56 MHz (HF) and 868 MHz (UHF) embedded in concrete specimen resulted positive for transmission depths of up to 13 cm, which is quite promising, considering that corrosion would appear first at the top level of rebars. A second generation of passive RFID sensor systems has been implemented with improved antenna design. Current experiments using these systems focus on the Transmission characteristics in terms of transmission depths and the impact of concrete moisture. Low-energy humidity sensors are used and analysed regarding their capability for measuring the material moisture. Additionally, a relation between transmitted power to the embedded sensor and the moisture content of the concrete specimen caused by energy absorption can be presumed and is under systematic investigation. T2 - International Conference on Structural Health Monitoring of Intelligent Infrastructure 2017 CY - Brisbane, Australia DA - 05.12.2017 KW - RFID sensors KW - Structural health monitoring KW - Sensors in concrete KW - Smart structures PY - 2017 SN - 978-1-925553-05-5 SP - 1 EP - 7 AN - OPUS4-43492 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Wu, Cheng-Chieh A1 - Neumann, Patrick P. A1 - Hüllmann, Dino A1 - Krentel, Daniel A1 - Kluge, Martin A1 - Kohlhoff, Harald A1 - Lilienthal, A.J. T1 - Airborne remote gas sensing and mapping N2 - Leaking methane (CH4) from infrastructures, such as pipelines and landfills, is critical for the environment but can also pose a safety risk. To enable a fast detection and localization of these kind of leaks, we developed a novel robotic platform for aerial remote gas sensing. Spectroscopic measurement methods for remote sensing of selected gases lend themselves for use on mini-copters, which offer a number of advantages for inspection and surveillance over traditional methods. No direct contact with the target gas is needed and thus the influence of the aerial platform on the measured gas plume can be kept to a minimum. This allows to overcome one of the major issues with gas-sensitive mini-copters. On the other hand, remote gas sensors, most prominently Tunable Diode Laser Absorption Spectroscopy (TDLAS) sensors have been too bulky given the payload and energy restrictions of mini-copters. Here, we present the Unmanned Aerial Vehicle for Remote Gas Sensing (UAV-REGAS), which combines a novel lightweight TDLAS sensor with a 3-axis aerial stabilization gimbal for aiming on a versatile hexacopter. The proposed system can be deployed in scenarios that cannot be addressed by currently available robots and thus constitutes a significant step forward for the field of Mobile Robot Olfaction (MRO). It enables tomographic reconstruction of gas plumes and a localization of gas sources. We also present first results showing its performance under realistic conditions. T2 - 5th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2019) CY - Potsdam, Germany DA - 27.08.2019 KW - Localization of gas sources KW - Mobile Robot Olfaction KW - Tomographic reconstruction of gas plumes KW - Tunable Diode Laser Absorption Spectroscopy (TDLAS) KW - UAV-REGAS PY - 2017 AN - OPUS4-48789 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -