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检索条件"机构=Institute For Measurement And Sensor Technology"

共 475 条记录，以下是21-30 订阅

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Towards an Enhanced Metrology Analysis Procedure for Assessing Position Accuracy of Edge-Emitting Lasers to Photonic Integrated Circuits

Towards an Enhanced Metrology Analysis Procedure for Assessi...

引用

2024 IEEE Photonics Conference, IPC 2024

作者： Hinum-Wagner, Jakob Wilhelm Kraft, Jochen Sidorov, Victor Hoermann, Samuel Feigl, Gandolf Bergmann, Alexander Ams Osram Group Tobelbaderstraße 30 Premstaetten8054 Austria Graz University of Technology Institute of Electrical Measurement and Sensor Systems Inffeldgasse 33 Graz8010 Austria

ISBN: (纸本)9798350361957

Advanced photonic integrated systems require precise light source coupling, especially with edge-emitting lasers. This paper discusses how passive 2D alignment achieves below-micron accuracy. It introduces a metrology procedure for consistent analysis of the positioning process in manufacturing, ensuring optimal performance and reliable failure analysis. © 2024 IEEE.

关键词： Photonic integrated circuits

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DC measurement in HVAC-Systems: Status Quo and Recent Developments 58

DC Measurement in HVAC-Systems: Status Quo and Recent Develo...

引用

58th International Universities Power Engineering Conference, UPEC 2023

作者： Schachinger, Philipp Albert, Dennis Frohlich, Alexander Renner, Herwig Mandl, Johannes Trampitsch, Philipp Klambauer, Reinhard Bergmann, Alexander Schoffer, Werner Institute of Electrical Power Systems Graz University of Technology Graz Austria Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria Artemes GmbH Eibiswald Austria

ISBN: (纸本)9798350316834

The measurement of small direct currents in presence of high AC currents on high voltage potential is a challenging task. Inductive current transducers (CT) are not able to measure DC and other non-conventional CTs are also not designed for DC. Therefore, DC measurements are done in transformer neutral points on ground potential. In this work, the state of the art on DC measurements in the high-voltage transmission grid is given, including the measurement in the transformer neutral point, the indirect measurement with the differential magnetometer method, and the indirect method of measuring a compensating current. In addition an optical current measurement system under development is presented. © 2023 IEEE.

关键词： DC transformers

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Experiments of Time-Periodic Control During Run-Up of a Flexible Rotor 7

Experiments of Time-Periodic Control During Run-Up of a Flex...

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7th International Conference on Material Strength and Applied Mechanics, MSAM 2024

作者： Fasih, Muhammad Saad Van Baren, Johannes Dohnal, Fadi Research Center for Microtechnology Vorarlberg University of Applied Sciences Austria Fontys University of Applied Sciences Netherlands Institute of Measurement and Sensor Technology UMIT Tirol-Private University for Health Sciences and Health Technology Austria

ISBN: (纸本)9781643685472

Flexible rotors must pass through at least one critical speed before reaching its nominal or working speed. During passage through this resonance, transient vibrations are introduced in the rotor. For a better performance of the machinery, these vibrations must be kept below a certain threshold to keep a small clearance between the rotor and the stator. Modal coupling by periodic control is a modern approach which is capable of transferring kinetic energy between two selected modes. By introducing a time-periodic variation of the bearing characteristics, a modal energy transfer is induced in a flexible rotor during run-up and run-down. This concept reduces the main resonance peak during passage through resonance compared to the nominal run-up. By the application of this technique, we were able to reduce the maximum amplitude response during the run-up to 25.4 percent and during the run-down to 27.1 percent. © The Author(s), 2024.

关键词： Kinetic energy

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Fiber Optic Current sensor Prototype for Low DC measurements in the Power Grid 13

Fiber Optic Current Sensor Prototype for Low DC Measurements...

引用

13th IEEE International Workshop on Applied measurements for Power Systems, AMPS 2023

作者： Mandl, Johannes Trampitsch, Philipp Schachinger, Philipp Albert, Dennis Klambauer, Reinhard Bergmann, Alexander Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria Institute of Electrical Power Systems Graz University of Technology Graz Austria OMICRON Electronics GmbH Graz University of Technology Graz Austria

ISBN: (纸本)9798350312409

Our society is dependent on a continuous supply of electrical energy. Therefore, it is essential to closely monitor all occurring signals in the transmission grid to assess their effect on the grid's components and security of supply. In particular, the time course and distribution of direct currents such as geomagnetically induced currents is of great interest. In this paper, we report progress on the development of a fiber optic current sensor intended to observe direct currents on all three phases of a high-voltage power grid. The device exploiting the Faraday effect can be described in a theoretical model using Jones formalism. We calculated the sensor scale factor when using twisted single-mode and spun HiBi fiber as the sensing head, giving implications on the applicability of those fibers for a highly sensitive fiber optic current sensor. Laboratory results of the sensor prototype show a linear current relationship for currents below 1 A. © 2023 IEEE.

关键词： Fibers

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Thermo-Mechanical Coupled Digital Simulation of Torque sensor Based on Parallel Systems 2

Thermo-Mechanical Coupled Digital Simulation of Torque Senso...

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2nd IEEE International Conference on Digital Twins and Parallel Intelligence, DTPI 2022

作者： Wang, Xueqin Hu, Wanxin Qin, Lemeng Aviation Sensor Measurement and Testing Center Avic Changcheng Institute of Metrology and Measurement Beijing China Beijing University of Technology Faculty of Information Technology Beijing China

ISBN: (纸本)9781665492270

At present, the calibration of most torque sensors is carried out in an ideal laboratory environment. But the temperature around the torque sensor can vary widely in practical applications. The thermal radiation from ambient temperature usually causes the elastic element of the sensor to deviate from Hooke's law and resulting in errors. Based on this problem, we establish the digital simulation and an artificial system of a certain type of strain torque sensor by thermo-mechanical coupled digital simulation method, and we calculate the time-temperature distribution models and the time-elastic modulus distribution model of sensors under different working conditions by finite element thermal analysis and transient force analysis method. Finally, we summarize some change rule of the torque sensor parameters like elastic modulus or shear stress with temperature. So as to obtain the influence mechanism of temperature on the torque sensor, which provides a basis for the improvement of calibration method. © 2022 IEEE.

关键词： Finite element method

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Analytical Description of Transversally Symmetric Hinges with Semicircular Contours 16th

Analytical Description of Transversally Symmetric Hinges wi...

引用

16th International Federation of Theory of Machines and Mechanisms World Congress, IFToMM WC 2023

作者： Jahn, Hannes Fröhlich, Thomas Zentner, Lena TU Ilmenau Department of Mechanical Engineering Mechanics of Compliant Systems Group Ilmenau98693 Germany TU Ilmenau Department of Mechanical Engineering Institute of Process Measurement and Sensor Technology Ilmenau98693 Germany

ISBN: (纸本)9783031457081

Compliant mechanisms are becoming increasingly important, especially in force measurement and weighing technology, due to their zero backlash, wear resistance, and zero friction. Their deformation under external forces can be analyzed well with analytical calculations and FEM simulations. Analytically, only mechanisms with symmetrical and longitudinally symmetrical hinges are described. This paper presents a method that allows transversally symmetric hinges to be described analytically. The model must be computed numerically due to the built neutral fiber and the nonlinearities in the used calculation method. The developed method is then compared with FEM calculations in a parameter study and considered to be validated. Finally, outlooks are formulated on how the created method can for instance be used to develop load cells for later calculations. Moreover, it is shown to what extent it is possible to implement this method for general calculations of compliant mechanisms. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Hinges

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Automated Charging of Battery Electric Vehicles on Trains to Accelerate the Mobility Revolution

Automated Charging of Battery Electric Vehicles on Trains to...

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2024 IEEE International Conference on Green Energy and Smart Systems, GESS 2024

作者： Buchroithner, Armin Birgel, Christof Bertignoll, Timon Mitter, Tobias Wellenzohn, Simon Schimanofsky, Alexander Brunnhofer, Peter Demuth, Sebastian Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria SSC Railtec GmbH Graz Austria Easelink GmbH Graz Austria RCC Railway Competence and Certification GmbH Graz Austria Institute of Structural Durability and Railway Technology Graz University of Technology Graz Austria

ISBN: (纸本)9798350379617

The decarbonization of the transport sector, covering cargo as well as passenger mobility, plays a key role in the context of the energy revolution as it contributes to 24% of the global CO2 emissions. Battery electric vehicles (BEVs) are part of the solution, especially if their specific drawbacks, such as limited range and availability of charging infrastructure, are mitigated by combining them with electrified rail transport. This paper describes the implementation of partially automated BEV charging capabilities into rail wagons (motorail), with an emphasis on electric power flow from the overhead catenary system to the BEVs. First, a requirement profile is determined based on different use cases, leading to several design variants relying on different power electronics modules. Subsequently, an automated underbody charging interface for the BEV is discussed in depth supported by actual test rig data. © 2024 IEEE.

关键词： Charging stations

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Model-based analysis of the influence of surface roughness on fatigue processes

Model-based analysis of the influence of surface roughness o...

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94th Annual Meeting of the International Association of Applied Mathematics and Mechanics, GAMM 2024

作者： Yan, Sikang Jawaid, Arsalan Kerscher, Eberhard Seewig, Jörg Müller, Ralf Institute for Mechanics Technical University of Darmstadt Darmstadt Germany Institute for Measurement and Sensor Technology RPTU Kaiserslautern-Landau Kaiserslautern Germany Working Group Materials Testing RPTU Kaiserslautern-Landau Kaiserslautern Germany

In the last decade, the phase field method was developed to simulate fatigue fracture processes. The biggest advantage of phase field modeling is its unified framework, in which the entire fracture evolution from nucleation to propagation is covered. Even though it is known that surface roughness has an essential impact on fatigue life, it has rarely been considered directly in phase field models for fatigue processes due to the required computational effort. In this work, we provide a simulation setup to incorporate roughness profiles into a phase field model for fatigue cracks. We have used a roughness model for our studies and also present initial results that show agreement between simulation and experiments. © 2024 The Author(s). Proceedings in Applied Mathematics & Mechanics published by Wiley-VCH GmbH.

关键词： Fatigue crack

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Excitation Period Optimization of Photothermal Signals for Gas Sensing

Excitation Period Optimization of Photothermal Signals for G...

引用

Applied Industrial Optics: Spectroscopy, Imaging and Metrology, AIO 2022

作者： Radeschnnig, Ulrich Lang, Benjamin Bergmann, Alexander Institute of Electrical Measurement and Sensor Systems Graz University of Technology Inffeldgasse 33/I Graz8010 Austria

Photothermal spectroscopy is a promising technique for monitoring gas concentrations. We provide an approach to signal enhancement relying upon the ratio between excitation frequency and gas flow velocity. Our stateme... 详细信息

ISBN: (纸本)9781957171081

关键词： Flow velocity

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An ultrastable metrology laser for traceable length metrology in nanopositioning machines – Towards a 10⁻¹² uncertainty level

An ultrastable metrology laser for traceable length metrolog...

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作者： Blumröder, Ulrike Köchert, Paul Fröhlich, Thomas Ortlepp, Ingo Kissinger, Thomas Manske, Eberhard Technische Universität Ilmenau Institute of Process Measurement and Sensor Technology Ilmenau Germany Physikalisch Technische Bundesanstalt (PTB) Precision Engineering Division Braunschweig Germany

In this contribution we propose the incorporation of a diode laser stabilized to an ultrastable cavity (ORS) as a metrology laser within the interferometric length measurement system of a nanopositioning and -measuring machine with a lateral measurement range of 200 mm. Based on a frequency instability analysis of the ORS against a GPS-referenced frequency comb we observed a frequency drift of 6.2 kHz(Δf/f = 1.3∙10⁻¹¹) during the course of one day and peak-to-peak variations below 81 kHz (Δf/f = 1.7∙10⁻¹⁰) over observation times up to ten days. Within daily operation of the NPMM-200, the influence of cavity-related frequency changes practically falling below the current digital resolution limit of the interferometric measurement system (2.86∙10⁻¹¹) and can therefore be neglected, if a sufficient predetermination of the absolute frequency using an optical frequency comb has been applied. To guarantee an absolute tracking of the laser frequency within a non-stop service operation of the ORS at an uncertainty level of 1∙10⁻¹², a suitable correction for the long-term frequency changes of the cavity with the help of the frequency comb has to be established. © 2024

关键词： Frequency stability Interferometry Optical frequency comb Precision metrology Traceability Ultrastable laser sources

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