TY - JOUR A1 - Küchler, Andreas A1 - Bellm, H. A1 - Herold, J. A1 - Schwab, A. T1 - Rogowski-Spulen und Magnetfeldsensoren zur Messung transienter Ströme im Nanosekundenbereich BT - Teil 2 JF - Archiv für Elektrotechnik Y1 - 1985 UR - http://permalink.bibkatalog.de/BV013241178 VL - 68 SP - 69 EP - 74 ER - TY - CHAP A1 - Küchler, Andreas A1 - Leibfried, T. A1 - Kachler, A.J. A1 - Zängl, W.S. A1 - Der Houhanessian, V. A1 - Breitenbauch, B. T1 - Ageing and Moisture Analysis of Power Transformer Insulation Systems BT - CIGRÉ 2002 T2 - International Council on Large Electric Systems Y1 - 2002 SP - 12 EP - 101 CY - Paris ER - TY - JOUR A1 - Küchler, Andreas A1 - Dams, J. A1 - Dunz, Th. A1 - Schwab, A. T1 - Kapazitive Sensoren zur Messung transienter elektrischer Felder und Spannungen JF - Archiv für Elektrotechnik Y1 - 1985 UR - http://permalink.bibkatalog.de/BV013241178 VL - 68 IS - 1985 SP - 335 EP - 344 ER - TY - JOUR A1 - Küchler, Andreas A1 - Epping, W. A1 - Schwab, A. T1 - Elektrische Feldstärkemessung mit doppelbrechenden und optisch aktiven Kristallen JF - Archiv für Elektrotechnik Y1 - 1984 UR - http://permalink.bibkatalog.de/BV013241178 VL - 67 SP - 329 EP - 339 ER - TY - CHAP A1 - Küchler, Andreas A1 - Dams, J. A1 - Dunz, Th. A1 - Epping, W. A1 - Kunz, H. A1 - Schwab, A. T1 - Kerr-Effect Measurements of Pulsed Electric Fields in Water T2 - 5th IEEE Pulse Power Conf. Y1 - 1985 CY - Arlington VA, USA ER - TY - CHAP A1 - Küchler, Andreas A1 - Dams, J. A1 - Dunz, Th. A1 - Schwab, A. T1 - Design and Operation of a Tera-Watt Pulse-Power Generator T2 - 5th ISH Int. Symp. on High Voltage Engineering Y1 - 1987 SP - 02 EP - 61 CY - Braunschweig ER - TY - THES A1 - Schmitt, Maximilian A1 - Petzoldt, Jürgen A1 - Ackva, Ansgar A1 - Stadler, Alexander T1 - Aktive Dämpfung von Gleichtaktstörungen in elektrischen Antriebssystemen N2 - Die vorliegende Arbeit beschäftigt sich mit der Entstehung und Wirkung von Gleichtaktstörungen in elektrischen Antriebssystemen. Parasitäre Gleichtaktimpedanzen bilden zusammen mit Gegentaktimpedanzen des Antriebssystems parasitäre Resonanzschwingkreise aus, welche von den Schalthandlungen der eingesetzten Umrichter im Antriebssystem zum Schwingen angeregt werden. Einer der beiden Schwerpunkte befasst sich mit der Entwicklung einer analytischen Berechnungsmethode, um die vorhandenen parasitären Gleichtaktpfade sowie deren Resonanzfrequenzen zu ermitteln. Der zweite Schwerpunkt behandelt die Möglichkeit der aktiven Dämpfung von Gleichtaktstörungen. Hierzu analysiert ein Algorithmus jede einzelne Schaltflanke im Umrichter auf deren Wirkung im Gleichtaktsystem. Anschließend kann diese zeitlich derart verschoben werden, dass die Schaltflanke eine bestmögliche Dämpfung im Gleichtaktsystem erzielt. Einleitend werden die notwendigen Grundlagen zur Umrichtertechnik sowie der Ausbildung und Anregung von Resonanzschwingkreisen am Beispiel eines RLC-Reihenschwingkreises erklärt, der stellvertretend für das stark reduzierte Gleichtaktmodell eines modernen Antriebssystems steht. Die Literaturrecherche gibt einen detaillierten Einblick über aktuelle Methoden der Reduktion von Gleichtaktstörungen wieder. Viele wissenschaftliche Veröffentlichungen behandeln modifizierte Ansteuerverfahren für die eingesetzten Umrichter, welche gezielt die Gleichtaktspannungen eines jeden Spannungsraumzeigers ausnutzen. Die Theorie und Funktionsweise des neuen Steuerverfahrens HCad, wird mathematisch hergeleitet und anhand eines idealen Simulationsmodells untersucht. Die Auswertung der Simulationsergebnisse ermöglicht es bereits, die dämpfende Wirkung unter idealen Bedingungen zu quantifizieren. Die Umsetzung eines praxisnahen Laborprüfstands dient der Verifikation und dem Vergleich realer Messungen mit den in der Simulation gewonnen Erkenntnissen. Die durchgeführten Messreihen bestätigen die Möglichkeit, Gleichtaktstörungen mithilfe einer zeitlichen Flankenverschiebung im Umrichter zu bekämpfen. Des Weiteren ist gezeigt, dass die Anwendung der aktiven Gleichtaktdämpfung neben der eigentlichen Aufgabe eines Steuerverfahrens in vollem Umfang und über den kompletten Modulationsbereich eines Umrichters möglich ist. KW - Elektroantrieb KW - Aktive Schwingungsdämpfung KW - Gleichtaktstörung KW - Antrieb (Technik) KW - Dämpfung KW - Umrichter KW - Gleichtaktspannung KW - Impedanz Y1 - 2020 UR - https://www.db-thueringen.de/receive/dbt_mods_00042672 PB - TU Ilmenau CY - Ilmenau ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Mathias A1 - Stark, Thomas A1 - Knopp, Kevin A1 - Zänglein, Marc A1 - Lenski, Philipp A1 - Schreiber, Ekkehard A1 - Schmidt, Franz A1 - Brunner, Martin A1 - Müller, Michael T1 - Thermophysical property measurements at high-temperatures for power engineering and additive manufacturing processes BT - QIRT 2018, 25 - 29 June 2018, Berlin, Germany N2 - To address the needs for increasing efficiency in power conversion, stratified structures like thermal barrier coatings, are used to increase operation temperature. Also advanced material processing like 3D laser printing of metals and ceramics are based on a layer-to-layer process at high temperatures, resulting in non-homogeneous components. Both systems require more and more detailed investigation methods to characterise the material properties of the resulting structures and to optimize the relevant processes. To address the required needs in advanced material characterisation recently an attempt was started to develop a unique measurement set-up for advanced material characterisation. This method is based on the well know laser flash principle, which was improved by adding supplementary heating sources and additional detection channels. Combining different heating mechanism and heating times with the two-dimensional measuring of the thermal flow across the sample enables the determination of different opto-thermal parameters and other material properties, e.g. mechanical contact, electrical conductivity or optical data, which also depend on or affect the flow of heat. In this paper we describe the implementation of the different optical methods to measure the thermal heat flow by point-like and two-dimensional temperature measurement and present first results on several samples. KW - thermophysical property measurement KW - additive manufacturing process Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:863-opus-17678 SN - 978-3-940283-94-8 CY - Berlin ER - TY - JOUR A1 - Jürgen, Hartmann A1 - Arduini, Mariacarla A1 - Manara, Jochen A1 - Stark, Thomas A1 - Ebert, Hans-Peter T1 - Development and Evaluation of an Improved Apparatus for Measuring the Emissivity at High Temperatures JF - Sensors N2 - An improved apparatus for measuring the spectral directional emissivity in the wavelength range between 1 µm and 20 µm at temperatures up to 2400 K is presented in this paper. As a heating unit an inductor is used to warm up the specimen, as well as the blackbody reference to the specified temperatures. The heating unit is placed in a double-walled vacuum vessel. A defined temperature, as well as a homogenous temperature distribution of the whole surrounding is ensured by a heat transfer fluid flowing through the gap of the double-walled vessel. Additionally, the surrounding is coated with a high-emitting paint and serves as blackbody-like surrounding to ensure defined boundary conditions. For measuring the spectral directional emissivity at different emission angles, a movable mirror is installed in front of the specimen, which can be adjusted by a rotatable arrangement guiding the emitted radiation into the attached FTIR-spectrometer. The setup of the emissivity measurement apparatus (EMMA) and the measurement procedure are introduced, and the derived measurement results are presented. For evaluating the apparatus, measurements were performed on different materials. The determined emissivities agree well with values published in literature within the derived relative uncertainties below 4% for most wavelengths. KW - emissivity KW - reflectivity KW - infrared radiation KW - high temperature KW - Temperatur KW - Emissivität Y1 - 2021 UR - https://www.mdpi.com/1424-8220/21/18/6252 U6 - https://doi.org/10.3390/s21186252 SN - 1424-8220 VL - 21 IS - 18 ER - TY - CHAP A1 - Küchler, Andreas A1 - Schober, F. A1 - Krieg, A. A1 - Liebschner, M. A1 - Berger, Frank T1 - Parameter influences on HVDC transformer insulation and its link to conduction processes T2 - 32nd International Conference “Science in Practice” Y1 - 2014 CY - Osijek, Croatia ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Litorja, M. A1 - Fowler, J. A1 - Fox, N. A1 - Stock, M. A1 - Razet, A. A1 - Khlevnoy, B. A1 - Ikonen, E. A1 - Machacs, M. A1 - Doytchinov, K. T1 - Final report on the CCPR-S2 supplementary comparison of area measurements of apertures for radiometry JF - Metrologia Y1 - 2007 UR - http://permalink.bibkatalog.de/BV012573233 VL - 44 IS - 02002 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Moritz, W. A1 - Roth, U. A1 - Heyde, M. A1 - Rademann, K. A1 - Reichling, M. T1 - Submicrosecond range surface heating and temperature measurement for efficient sensor reactivation JF - Thin Solid Films Y1 - 2001 UR - http://permalink.bibkatalog.de/BV013351743 IS - 391 SP - 143 EP - 148 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Thuillier, G. A1 - Foujols, T. A1 - Bolsée, D. A1 - Gillotay, D. A1 - Hersé, M. A1 - Petermanns, W. A1 - Decupyer, W. A1 - Mandel, H. A1 - Sperfeld, P. A1 - Taubert, Dieter Richard T1 - SOLAR/SOLSPEC BT - Scientific objectives, instrument performances and its absolute calibration using a blackbody as primary standard source JF - Solar Physics Y1 - 2009 UR - http://permalink.bibkatalog.de/BV021245164 IS - 257 SP - 185 EP - 213 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Lowe, D. A1 - Machin, Graham A1 - Sadli, M. A1 - Yamada, Y. T1 - Thermodynamic temperature determinations of Co-C, Pd-C Pt-C and Ru-C eutectic fixed-points cells JF - Metrologia Y1 - 2006 UR - http://permalink.bibkatalog.de/BV012573233 VL - 43 IS - 2 SP - 78 EP - 83 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Machin, G. A1 - Bloembergen, P. A1 - Sadli, M. A1 - Yamada, Y. T1 - A concerted international project to establish high-temperature fixed-points for primary thermometry JF - International Journal of Thermophysics Y1 - 2007 UR - http://permalink.bibkatalog.de/BV013298193 IS - 28 SP - 1976 EP - 1982 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Reichling, M. ED - Nazaré, H. ED - Neves, A.J. T1 - Thermal transport in diamond T2 - Properties and growth of diamond Y1 - 2001 UR - https://books.google.de/books?id=jtC1mUFZfQcC&printsec=frontcover PB - Institution of Electrical Engineers CY - London ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Sadli, M. A1 - Anhalt, Klaus A1 - Schiller, S. T1 - Thermal effects in the BB3200pg on M-C eutectic implementation JF - International Journal of Thermophysics Y1 - 2009 UR - http://permalink.bibkatalog.de/BV013298193 IS - 30 SP - 69 EP - 76 ER - TY - CHAP A1 - Küchler, Andreas A1 - Krieg, A. A1 - Lala, G. A1 - Schober, F. A1 - Wiener, J. A1 - Paulus, J. A1 - Zink, Markus H. A1 - Liebschner, M. T1 - FEM model for describing the dielectric behavior of oil-impregnated pressboard under DC stresses BT - SIP 2015 T2 - 33rd International Conference “Science in Practice” Y1 - 2015 UR - http://permalink.bibkatalog.de/BV042665355 CY - Schweinfurt ER - TY - JOUR A1 - Hartmann, Jürgen T1 - New Developments in High-Temperature Measurement Techniques JF - International Journal of Electrical and Computer Engineering Systems Y1 - 2014 VL - 5 IS - 2 SP - 63 EP - 67 ER - TY - CHAP A1 - Spieß, Florian A1 - Friesslich, Jonas A1 - Bluemm, Daniel A1 - Mast, Fabio A1 - Vinokour, Dmitrij A1 - Kounev, Samuel A1 - Kaupp, Tobias A1 - Strobel, Norbert T1 - Towards a Mobile Robot Localization Benchmark with Challenging Sensordata in an Industrial Environment T2 - 2021 20th International Conference on Advanced Robotics (ICAR) N2 - To arrive at a realistic assessment of localization methods in terms of their performance in an industrial environment under various challenging conditions, we provide a benchmark to evaluate algorithms both for individual components as well as multi-sensor systems. For several sensor types, including wheel odometry, RGB cameras, RGB-D cameras, and LIDAR, potential issues were identified. The accuracy of wheel odometry, for example, when there are bumps on the track. For each sensor type, we explicitly chose a track for the benchmark dataset containing situations where the sensor fails to provide adequate measurements. Based on the acquired sensor data, localization can be achieved either using a single sensor information or sensor fusion. To help evaluate the output of associated localization algorithms, we provide a software to evaluate a set of metrics as part of the paper. An example application of the benchmark with state-of-the-art algorithms for each sensor is also provided. Y1 - 2021 U6 - https://doi.org/10.1109/ICAR53236.2021.9659355 SP - 857 EP - 864 ER - TY - JOUR A1 - Spiess, Florian A1 - Reinhart, Lukas A1 - Strobel, Norbert A1 - Kaupp, Tobias A1 - Kaiser, Dennis A1 - Kounev, Samuel T1 - People detection with depth silhouettes and convolutional neural networks on a mobile robot JF - Journal of Image and Graphics N2 - This paper presents a novel people detection approach for mobile robot applications based on a combination of classical computer vision techniques and a state-of-the-art neural network. Our approach involves an RGB-D camera as an environmental sensor. The depth data is used to extract silhouettes around people. The RGB images are subsequently augmented with this border information before passing it to the neural network. Under challenging lighting conditions, our system was able to outperform the neural network trained on regular RGB data alone by a factor of two. Y1 - 2021 UR - http://www.joig.net/index.php?m=content&c=index&a=show&catid=72&id=277 VL - 9 IS - 4 SP - 135 EP - 139 ER - TY - CHAP A1 - Spiess, Florian A1 - Strobel, Norbert A1 - Kaupp, Tobias A1 - Kounev, Samuel T1 - A data-driven Sensor Model for LIDAR Range Measurements used for Mobile Robot Navigation T2 - 2022 Sixth IEEE International Conference on Robotic Computing (IRC) N2 - In this paper, an analysis of the precision of LIDAR range measurements is presented. LIDAR data from two different sensors (HLS-LFCD-LDS and SICK TIM561) were analyzed regarding the influence of range, incident angle to the surface, and material. Based on the results, a data-driven model for LIDAR precision behavior was developed, and a comparison with standard deviation models based on the vendor-provided specifications was presented. Our model can be used to create realistic sensor simulations and to develop robot navigation algorithms weighing sensor range readings based on the precision. Y1 - 2022 U6 - https://doi.org/10.1109/IRC55401.2022.00020 SP - 76 EP - 80 ER - TY - JOUR A1 - Spiess, Florian A1 - Friesslich, Jonas A1 - Kaupp, Tobias A1 - Kounev, Samuel A1 - Strobel, Norbert T1 - Survey and Experimental Comparison of RGB-D Indoor Robot Navigation Methods Supported by ROS and Their Expansion via Fusion with Wheel Odometry and IMU Data JF - International Journal of Mechanical Engineering and Robotics Research Y1 - 2020 U6 - https://doi.org/10.18178/ijmerr.9.12.1532-1540 VL - 9 IS - 12 SP - 1532 EP - 1540 ER - TY - JOUR A1 - Spiess, Florian A1 - Strobel, Norbert A1 - Kaupp, Tobias A1 - Kounev, Samuel T1 - A data-driven Model for Range Sensors JF - Encyclopedia with Semantic Computing and Robotic Intelligence Y1 - 2023 UR - https://www.worldscientific.com/doi/abs/10.1142/S2529737623500065?journalCode=escri ER -