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19th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2019

作者： Klauer, Katja Eifler, Matthias Stelzer, Gerhard Kirsch, Benjamin Seewig, Jörg Aurich, Jan C. Technische Universität Kaiserslautern Institute for Manufacturing Technology and Production Systems Germany Technische Universität Kaiserslautern Institute for Measurement and Sensor-Technology Germany

ISBN: (纸本)9780995775145

Angular-resolved scattering (ARS) light sensors are a state of the art technique for in-process and on-machine measurement applications. They do not measure height values, but angles, which results into a high robustness regarding vibrations. The sensor requires corresponding calibration artefacts which can ensure a defined measurement uncertainty and a traceability of the measurement results. As the height values are not the actual measurand of the sensor, the traceability regarding the unit of length is a challenging task which is not yet standardized. A calibration artefact was designed which images and calibrates multiple properties of the ARS sensor. The M- and Aq-value as defined in the guideline VDA 2009 are imaged with different values. Based on stylus instrument measurements and a subsequent virtual ARS light sensor measurement, the suitability of different types of profiles for the calibration of the Aq-value are examined. It is demonstrated that the manufacturing method of ultra-precision turning provides the opportuinity to manufacture different suitable microstructured surfaces for the calibration of ARS light sensors. © 2019 European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019. All rights reserved.

关键词： Calibration

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Switching mechanism for off-grid hybrid power system (photovoltaic-wind) with storage battery 7

Switching mechanism for off-grid hybrid power system (photov...

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7th IEEE Palestinian International Conference on Electrical and Computer Engineering, PICECE 2019

作者： Khozondar, Hala Jarallah El Zainuddin, Siti Zafarh Bte Koch, Alexander W. Electrical Engineering Department Islamic University of Gaza P.O.Box 108 Gaza Palestine Institute for Measurement Systems and Sensor Technology German Institute for Science and Technology GIST-TUM Asia Singapore Singapore Institute for Measurement Systems and Sensor Technology Technische Universitaet Muenchen TUM MuenchenD-80333 Germany

ISBN: (纸本)9781538662915

This work describes a modelling and simulation of the switching mechanism of an off-grid hybrid power system. An offgrid system means that it is not connected to an electricity grid or network. An off-grid power system is important especially at catastrophe times and war where it is hard to get electricity from a utility grid. In addition to that, owners of residential and small-scale commercial structures which are located in remote areas will be able to have access to the electricity. The switching mechanism depends on the renewable energy amount. An off-grid hybrid power system utilizes an array of deep-cycle batteries to store the power generated by the solar panels and a wind turbine. When the renewable sources have excess energy, it is stored in the battery. However, If the renewable sources do not supply enough energy to the loads, the switching mechanism will let the battery provide the load with the required energy. The simulation results in this work show the advantages of using the off-grid system to produce electricity or power from one or more source of renewable energy. © 2019 IEEE.

关键词： Electric power transmission networks

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Micro milling of areal material measures –Study on surface generation for different up and down milling strategies

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Procedia CIRP 2020年 87卷 13-18页

作者： Katja Klauer Matthias Eifler Benjamin Kirsch Jörg Seewig Jan C. Aurich Institute for Manufacturing Technology and Production Systems TU Kaiserslautern Gottlieb-Daimler Str. 67663 Kaiserslautern Germany Institute for Measurement and Sensor-Technology TU Kaiserslautern Gottlieb-Daimler Str. 67663 Kaiserslautern Germany

Ball end micro milling is a suitable process for the manufacturing of freeform surfaces and therefore appropriate for the manufacturing of material measures according to ISO 25178-70. In previous studies of the authors, ball end micro milling of areal material measures with specified microstructures was experimentally investigated and the influence of the cutting parameters, as well as the influence of the control dataset parameters and the tilt angle were systematically analyzed. The influences of the surface generation strategy (up or down milling) and the chosen tool path on the surface quality of the manufactured structure are investigated experimentally in this study. For this purpose, a full factorial experimental design is created in which two different areal material measure geometries (ACS and AFL as described in ISO 25178-70) are examined applying two different tools in two different surface generation strategies (up or down milling). In addition, two different cases per surface generation strategy are tested: the tool is retracted in the milled groove (case 1: reverse movement with engaged tool) or the tool is lifted between two paths (case 2: reverse movement without tool contact). On the basis of these two cases it is possible to evaluate how the repeatability of the z-axis (case 1) or the smaller short-wavelength roughness due to the second cut (case 2) influences the surface quality of the milled structure. In addition, a meander-shaped tool path is tested as reference: the tool moves alternately in up and down milling direction without lifting from the workpiece. The meander-shaped tool path is the most time-efficient and was applied in previous studies. As a result, information on the influence of the milling strategy on dimensional accuracy and surface roughness is provided. The quality of the manufactured surfaces is compared both quantitatively (based on areal surface texture parameters) and qualitatively (measured topography compared to nominal

关键词： ball end micro milling material measures surface generation strategy

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Quantization of Acoustic Modes in Dumbbell Nanoparticles

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Physical Review Letters 2022年第4期128卷 048003-048003页

作者： Zuyuan Wang Hojin Kim Maria Secchi Maurizio Montagna Eric M. Furst Bahram Djafari-Rouhani George Fytas Max Planck Institute for Polymer Research Ackermannweg 10 Mainz 55128 Germany Institute for Measurement and Automation Division of Sensor Technology and Measurement Systems Bundeswehr University Munich Werner Heisenberg Weg 39 85579 Neubiberg Germany Department of Chemical & Biomolecular Engineering Allan P. Colburn Laboratory University of Delaware Newark Delaware 19716 USA Department of Industrial Engineering University of Trento via Sommarive 9 I-38123 Trento Italy Dipartimento di Fisica Universitá di Trento via Sommarive 14 I-38123 Trento Italy Institut d’Électronique de Microélectronique et de Nanotechnologie (IEMN) UMRCNRS 8520 Department of Physics University of Lille Villeneuve d’Ascq 59655 France

The vibrational eigenmodes of dumbbell-shaped polystyrene nanoparticles are recorded by Brillouin light spectroscopy (BLS), and the full experimental spectra are calculated theoretically. Different from spheres with a degeneracy of (2l+1), with l being the angular momentum quantum number, the eigenmodes of dumbbells are either singly or doubly degenerate owing to their axial symmetry. The BLS spectrum reveals a new, low-frequency peak, which is attributed to the out-of-phase vibration of the two lobes of the dumbbell. The quantization of acoustic modes in these molecule-shaped dumbbell particles evolves from the primary colloidal spheres as the separation between the two lobes increases.

关键词： Light-matter interaction Scattering theory Soft colloids Brillouin scattering & spectroscopy Finite-element method Inelastic light scattering

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Tip-and Laser-based 3D Nanofabrication in Extended Macroscopic Working Areas

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Nanomanufacturing and Metrology 2021年第3期4卷 132-148页

作者： Ingo Ortlepp Thomas Frohlich Roland FuBl Johann Reger Christoph Schaffel Stefan Sinzinger Steffen Strehle ReneTheska Lena Zentner Jens-Peter Zollner Ivo WRangelow Carsten Reinhardt Tino Hausotte Xinrui Cao Oliver Dannberg Florian Fern David Fischer Stephan Gorges Martin Hofmann Johannes Kirchner Andreas Meister Taras Sasiuk Ralf Schienbein Shraddha Supreeti Laura Mohr-Weidenfeller Christoph Weise Christoph Reuter Jaqueline Stauffenberg Eberhard Manske Institute of Process Measurement and Sensor Technology Technische Universitat IlmenauEhrenbergstrasse 2998693 IlmenauGermany Control Engineering Group Technische Universitat IlmenauIlmenauGermany Optical Engineering Group.Technische Universitat Ilmenau IlmenauGermany Microsystems Technology Group.Technische Universitat Ilmenau IlmenauGermany Precision Engineering Group.Technische Universitat Ilmenau IlmenauGermany Compliant Systems Group Technische Universitat IlmenauIlmenauGermany Micro-and Nanoelectronic Systems Group Technische Universitat IlmenauIlmenauGermany Nanoscale Systems Group.Technische Universitat Ilmenau IlmenauGermany Division for Research Service and Technology Transfer Technische Universitat IlmenauIlmenauGermany Electronics Technology Group.Technische Universitat Ilmenau IlmenauGermany IMMS Institut flir Mikroelektronik-und Mechatronik-Systeme Gemeinniitzige GmbH(IMMS GmbH) IlmenauGermany Fachgebiet Technische Physik City University of Applied SciencesBremenGermany Lehrstuhl fiir Fertigungsmesstechnik Friedrich-Alexander-U niversitat(FAU)Erlangen-NiirnbergGermany JUMO GmbH&Co.KG FuldaGermany Asphericon GmbH JenaGermany

The field of optical lithography is subject to intense research and has gained enormous ***,the effort necessary for creating structures at the size of 20 nm and below is considerable using conventional *** effort and the resulting financial requirements can only be tackled by few global companies and thus a paradigm change for the semiconductor industry is conceivable:custom design and solutions for specific applications will dominate future development(Fritze in:Panning EM,Liddle JA(eds)Novel patterning *** society for optics and ***,Bellingham,***://***/10.1117/12.2593229).For this reason,new aspects arise for future lithography,which is why enormous effort has been directed to the development of alternative fabrication ***,the technologies emerging from this process,which are promising for coping with the current resolution and accuracy challenges,are only demonstrated as a proof-of-concept on a lab scale of several square *** scale is not adequate for the requirements of modern lithography;therefore,there is the need for new and alternative cross-scale solutions to further advance the possibilities of unconventional *** challenges arise because of the technical progress in various other fields,realizing new and unique functionalities based on nanoscale effects,e.g.,in nanophotonics,quantum computing,energy harvesting,and life *** platforms for basic research in the field of scale-spanning nanomeasuring and nanofabrication are necessary for these tasks,which are available at the Technische Universitiit Ilmenau in the form of nanopositioning and nanomeasuring(NPM)*** this equipment,the limits of technical structurability are explored for high-performance tip-based and laser-based processes for enabling real 3D nanofabrication with the highest precision in an adequate working range of several thousand cubic millimete

关键词： Nanomeasuring Nanopositioning Nanomanufacturing Scale-spanning Tip-based Laser-based Nanofabrication

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Wearable vibrotactile interface using phantom tactile sensation for human-robot interaction 12th

Wearable vibrotactile interface using phantom tactile sensat...

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12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications, EuroHaptics 2020

作者： Seiler, Julian Schäfer, Niklas Latsch, Bastian Chadda, Romol Hessinger, Markus Beckerle, Philipp Kupnik, Mario Technische Universität Darmstadt Measurement and Sensor Technology Merckstraße 25 Darmstadt64283 Germany Technische Universität Dortmund Robotics Research Institute Otto-Hahn-Straße 8 Dortmund44227 Germany Technische Universität Darmstadt Institute for Mechatronic Systems Otto-Berndt-Straße 2 Darmstadt64287 Germany

ISBN: (纸本)9783030581466

We present a wearable vibrotactile feedback device consisting of four linear resonant actuators (LRAs) that are able to generate virtual stimuli, known as phantom tactile sensation, for human-robot interaction. Using an energy model, we can control the location and intensity of the virtual stimuli independently. The device consists of mostly 3D-printed rigid and flexible components and uses commercially available haptic drivers for actuation. The actuators have a rated frequency of 175 Hz which is close to the highest skin sensitivity regarding vibrations (150 to 300 Hz). Our experiment was conducted with a prototype consisting of two bracelets applied to the forearm and upper arm of six participants. Eight possible circumferential angles were stimulated, of which four originated from real actuators and four were generated by virtual stimuli. The responses given by the participants showed a nearly linear relationship within ± 10 ∘ for the responded angle against the presented stimulus angle. These results show that phantom tactile sensation allows for an increase of spatial resolution to design vibrotactile interfaces for human-robot interaction with fewer actuators. © The Author(s) 2020.

关键词： Phantoms

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Kinematic simulation to investigate the influence of the cutting edge topography when ball end micro milling

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Procedia CIRP 2021年 102卷 109-114页

作者： Katja Klauer Nicolas Altherr Matthias Eifler Benjamin Kirsch Volker Böß Jörg Seewig Jan C. Aurich Institute for Manufacturing Technology and Production Systems Technische Universität Kaiserslautern Gottlieb-Daimer Str. 67663 Kaiserslautern Germany Institute for Measurement and Sensor-Technology Technische Universität Kaiserslautern Gottlieb-Daimer Str. 67663 Kaiserslautern Germany IU University of Applied Sciences Juri-Gagrin-Ring 152 99084 Erfurt Germany Institute of Production Engineering and Machine Tools Leibniz Universität Hannover An der Universität 2 30823 Gabsen Germany

During the ball end micro milling of material measures, the cutting edge topography is imaged on the machined workpiece. The influence of the chipping on the resulting surface quality is much more dominant than other kinematic effects. In this simulative study, a model is built that is able to predict the correlation between the cutting edge topography and the resulting workpiece topography. Thus, the mentioned correlation can be investigated without overlaying effects of material separation or measurement uncertainties, which are unavoidable in an experimental study. The model has been validated based on four artificial chippings.

关键词： micro milling cutting edge topography kinematic simulation dexel model

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Scanning Acoustic Microscopy for Quantifying Two-phase Transfer in Operando Alkaline Water Electrolyzer

arXiv

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arXiv 2024年

作者： Dou, Zehua Rox, Hannes Ramos, Zyzi Baumann, Robert Ravishankar, Rachappa Czurratis, Peter Yang, Xuegeng Lasagni, Andrés Fabian Eckert, Kerstin Czarske, Juergen Weik, David Faculty of Electrical and Computer Engineering Laboratory of Measurement and Sensor System Technique Technische Universität Dresden Helmholtzstraße 18 Dresden01069 Germany Institute of Fluid Dynamics Helmholtz-Zentrum Dresden-Rossendorf Bautzner Landstraße 400 Dresden01328 Germany PVA TePla Analytical Systems GmbH Deutschordenstraße 38 Westhausen73463 Germany Institute of Manufacturing Science and Engineering Technische Universität Dresden George-Baehr-Straße 3c Dresden01069 Germany Fraunhofer Institute for Material and Beam Technology IWS Winterbergstraße 28 Dresden01277 Germany Institute of Process Engineering and Environmental Technology Technische Universität Dresden Helmholtzstraße 14 Dresden01069 Germany Hydrogen Lab School of Engineering Technische Universität Dresden Helmholtzstraße 14 Dresden01062 Germany Institute for Emerging Electronic Technologies Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstraße 20 Dresden01069 Germany

Improved understandings of two-phase transport in electrochemical gas-evolving systems are increasingly demanded, while high-performance imaging techniques using simplified instrumentations are not readily available. This work presents volumetric scanning acoustic microscopy (SAM) imaging for quantifying the dynamics of gas bubbles and electrolyte in porous Nickel electrodes with different wettability and structures during alkaline water electrolysis (AWE). We realize high-resolution 3D imaging at 10's µm level using high frequency spherically focused ultrasound. The high resolution allowed us to clearly visualize the spatial distributions of produced bubbles in the porous electrodes over time. Moreover, we are able to quantify the residual gas volume in an electrode and its coverage due to bubble evolution, which dominate its transport overpotential. Taking these advantages, we elucidate the impacts of electrodes' wettability and structures on their electrolysis performance, on a regular laboratory base. The obtained knowledge provides us important optimization guidelines of AWE designs and operating schemes. Copyright © 2024, The Authors. All rights reserved.

关键词： Mass transfer

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Evaluation of the Point Sampling Method and Inter-Comparison of Remote Emission Sensing systems for Screening Real-World Car Emissions

SSRN

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SSRN 2023年

作者： Knoll, Markus Penz, Martin Schmidt, Christina Pöhler, Denis Rossi, Tommaso Casadei, Simone Bernard, Yoann Hallquist, Åsa M. Sjödin, Åke Bergmann, Alexander Institute of Electric Measurement and Sensor Systems Graz University of Technology Inffeldgasse 33/I Graz8010 Austria Institute of Environmental Physics Heidelberg University INF 229 Heidelberg69120 Germany Airyx GmbH Justus-von-Liebig-Str. 14 Eppelheim69214 Germany Innovhub - Stazioni Sperimentali per l’Industria S.r.k. Sustainable Mobility Team Via G. Galilei 1 San Donate Milanese Milan20097 Italy ICCT International Council on Clean Transportation Neue Promenade 6 Berlin10178 Germany IVL Swedish Environmental Research Institute Valhallavaegen 81 Stockholm10031 Sweden

Emissions from internal combustion vehicles are currently not properly monitored throughout their life cycle. Remote Emission Sensing (RES) is a technology that can detect emissions in real driving conditions without contact. Current RES systems, based on the measurement of light extinction from exhaust plumes, are capable of providing emission factors for various gases, but lack accuracy for particulate matter (PM). Point Sampling (PS) is an RES technique that extracts portions of the exhaust plume using exhaust gas analyzers that measure gaseous compounds aswell as various particle metrics such as black carbon or particle number concentrations. In this work we have evaluated the performance of a recently developed PS system and the state-of-the-art light extinction based systems EDAR (HEAT) and AccuScan (OPUS RSE) in application settings. In three measurement campaigns in different European cities we co-located the PS system with one of the extinction based systems. Validation measurements with portable emission measurement systems and the emission screening of several thousand passenger cars provide detailed insights into the performance of the systems. measurement results demonstrate the ability of the PS system to screen high and low PM emitters equally well. The AccuScan system is capable of measuring PM emissions from older diesel vehicles, but the light extinction-based systems are unable to quantify PM emissions from vehicles that meet the latest emission standards. We found that all three systems tested were capable of screening NOx emissions with a similar level of accuracy. The applicability of the RES systems in different weather conditions was explored. The PS capture rate is strongly affected by wind conditions, but no other weather influences were found. Both light extinction based systems are unable to measure during rain. These results provide detailed information on the performance of different RES technologies. © 2023, The Authors. All rights res

关键词： Air pollution

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Energy-efficient Routing of Electric Vehicles with Integrated Photovoltaic Installations

Energy-efficient Routing of Electric Vehicles with Integrate...

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IEEE Instrumentation and measurement technology Conference

作者： Christian Schuss Tapio Fabritius Bernd Eichberger Timo Rahkonen Optoelectronics and Measurement Techniques (OPEM) Research Unit University of Oulu Finland Institute of Electronic Sensor Systems Graz University of Technology Austria Circuits and Systems (CAS) Research Unit University of Oulu Finland

ISBN: (数字)9781728144603

ISBN: (纸本)9781728144610

This paper investigates the potential output power of photovoltaic (PV) installations on top of battery-powered electric vehicles (BEVs) and hybrid electric vehicles (HEVs). By choosing different routes within urban areas, we expect different output power levels from the vehicle's PV installation. Hence, we calculate energy profiles to estimate the PV energy which can be gained during driving conditions to choose the most energy-efficient route for BEVs and HEVs. While driving duration, driving distance and traffic conditions are some of the criteria within the decision-making process of routing algorithms, in this paper, we focus on energy-efficiency of routing algorithms. We present experimental data to highlight the importance of energy profiles for improving and maximising of the electrical driving distance of BEVs and HEVs.

关键词： algorithm battery-powered electric vehicle data acquisition energy profile environmental data hybrid electric vehicle measurement photovoltaic energy solar energy Hybrid electric vehicles Photovoltaic energy Energy efficiency Environmental data Electric vehicles Data Collection Methods Solar Energy Routing algorithms Installations ROADWAY-POWERED ELECTRIC VEHICLES algorithms Automobile driving Output power

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