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

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Torque Sensing with Tunable Millimeter Wave Metamaterial and a FMCW Chip 16

Torque Sensing with Tunable Millimeter Wave Metamaterial and...

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16th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2022

作者： Schossmann, A. Michenthaler, C. Hammerschmidt, D. Bergmann, A. Graz University of Technology Institute of Electrical Measurement and Sensor Systems Inffeldgasse 33/I Graz8010 Austria Infineon Technologies Austria AG Siemensstraße 2 Villach9500 Austria

ISBN: (数字)9781665465847

ISBN: (纸本)9781665465847

Real-time torque sensing in power trains and robotics is still a major challenge for state of the art sensor technology. We present a new torque sensor concept based on tunable millimeter wave metamaterials. The concept is to mechanically translate torque signals into a shift of the metamaterial resonance frequency which in turn leads to a tuning of its reflection spectra. This tuning is detected using a frequency modulated continuous wave (FMCW) chip. We show the feasibility of the sensor concept by means of numerical simulations and provide the proof of concept by means of a demonstrator. It gives a measurement range from 0 N m to 7.58 N m with an accuracy ≤ 2.37 % full scale. We believe that our concept is potentially the basis for a new torque sensor technology. © 2022 IEEE.

关键词： Metamaterials

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Physical modeling of full-field time-domain optical coherence tomography 2

Physical modeling of full-field time-domain optical coherenc...

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2nd International Conference of the DFG International Research Training Group 2057 - Physical Modeling for Virtual Manufacturing, iPMVM 2020

作者： Keksel, Andrej Bulun, Georgis Eifler, Matthias Idrizovic, Anis Seewig, Jörg Institute for Measurement and Sensor-Technology Technische Universität Kaiserslautern Germany Institute of Optics University of Rochester NY United States

ISBN: (纸本)9783959771832

In this paper, a physical model of full-field time-domain optical coherence tomography (FF-TD OCT), which focuses the requirements of measuring inner textures of flexible layered samples in industrial applications, is developed and validated by reference measurements. Both the operating principle and the overall design of a FF-TD OCT correspond to that of classical white light interferometry (WLI), commonly used for the measurement of areal micro-topographies. The presented model accounts for optical and geometrical properties of the system, multiple scattering of light in turbid media and interference of partially coherent light. Applying this model, virtual measurements are used to exemplarily investigate the extent to which the principles of classical WLI can be directly transferred to obtain layer thickness measurements by simulating the use of a simple low-cost WLI system as OCT. Results indicate that a currently existing instrument setup can only be used as OCT to a very limited extent but not in general due to its initial design as a WLI. © Andrej Keksel, Georgis Bulun, Matthias Eifler, Anis Idrizovic, and Jörg Seewig.

关键词： Optical tomography

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Design optimization of silicon nitride-based micro-ring resonator systems in a CMOS mass production environment 7

Design optimization of silicon nitride-based micro-ring reso...

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Integrated Optics: Design, Devices, Systems and Applications VII 2023

作者： Hinum-Wagner, Jakob Wilhelm Buchberger, Anton Schmidt, Christoph Schörner, Christian Rist, Desiree Hoermann, Samuel Marko Feigl, Gandolf Malicka, Iga Janka, Stephan Kraft, Jochen Bergmann, Alexander Institute of Electrical Measurement and Sensor Systems Graz University of Technology Inffeldgasse 33 Graz8010 Austria Institute of Analytical Chemistry and Food Chemistry Graz University of Technology Stremayrgasse 9 Graz8010 Austria ams-OSRAM AG Tobelbaderstraße 30 Premstaetten8141 Austria ams-OSRAM International GmbH Leibnitzstraße 4 Regensburg93055 Germany

ISBN: (数字)9781510662711

ISBN: (纸本)9781510662704

Micro-ring resonators (MRR) are basic photonic components, which serve as crucial building blocks for a variety of devices, e.g. integrated sensors, external cavity lasers, and high speed photonic data transmitters. Silicon nitride photonic platforms are particularly appealing in this field o f a pplication, s ince t his w aveguide material enables on-chip photonic circuitry with (ultra-) low losses in the NIR as well as across the whole visible spectral range. In this contribution we investigate key performance properties of MRRs in the wavelength range around 850 nm, such as free spectral range (FSR), quality factor (Q factor) and extinction ratio. We systematically investigate a large parameter space given by the MRR radii, coupling gaps between ring and bus waveguide, as well as waveguide width. Furthermore, we compare key properties such as the Q factor between low pressure chemical vapor deposition (LPCVD) and plasma enhanced chemical vapor deposition (PECVD) Si3N4 platforms and find enhanced values for LPCVD ring resonators reaching nearly a Q factor of *** fabrication is carried out with standard CMOS foundry equipment, utilizing photolithography and reactive ion etching on 250 nm thick silicon nitride films. A s c ladding m aterial, h igh d ensity P ECVD s ilicon o xide i s d eposited p rior t o the waveguide onto bare silicon and a sputtered oxide serves as upper cladding. With this process toolbox full CMOS backend compatibility is achieved when considering only PECVD Si3N4 waveguide material. In terms of manufacturability, special focus is put on the die-to-die as well as on wafer-to-wafer variability of the performance parameters, which is crucial when considering mass production of MRR devices. Finally, the experimental findings are compared to finite difference time domain (FDTD) simulations of the MRR circuits revealing excellent agreement when considering the manufacturing variability. © 2023 SPIE.

关键词： Silicon nitride

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Microscale Electromagnetic Tracking Using a Second-Generation Quantum sensor

Microscale Electromagnetic Tracking Using a Second-Generatio...

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Impedance Spectroscopy (IWIS), International Workshop on

作者： Thomas Thuilot Marc Simoneit Jonas Brodmann Michael Schäfer Andreas Hennig Olfa Kanoun Institute for Measurement Engineering and Sensor Technology Ruhr West University of Applied Sciences Mülheim a. d. Ruhr Germany Institute of Computer Science Ruhr West University of Applied Sciences Bottrop Germany Chair for Measurement and SensorTechnology Chemnitz University of Technology Chemnitz Germany

ISBN: (数字)9798331507626

ISBN: (纸本)9798331507633

This study demonstrates the application of second-generation quantum sensors in one-dimensional tracking. Due to their compact size, these magnetic field-sensitive sensors are particularly advantageous for medical and industrial settings where conventional sensors may be too large or vulnerable to electromagnetic interference. The proposed sensor setup achieves an average resolution of 1.22 mV/mm for tracking within a 100 mm range. The study also explores the nature and impact of various noise sources and discusses potential future techniques for mitigating these interferences.

关键词： Spectroscopy Electric potential Magnetic sensors Conferences Noise Electromagnetic interference Impedance Electromagnetics Quantum sensing

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Medical Robotics for Engineering Undergraduates Through an Affordable Hands-on Lab Experiment

Medical Robotics for Engineering Undergraduates Through an A...

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IEEE Education Engineering (EDUCON)

作者： Sven Suppelt Felix Herbst Romol Chadda Markus Hessinger Niklas Schäfer Matthias Rutsch Larissa Vorpahl Lajos Basten Thomas Vogl Mario Kupnik Measurement and Sensor Technology Group Technische Universität Darmstadt Germany Independent. Institute for Diagnostic and Interventional Radiology Goethe University Frankfurt University Hospital Frankfurt Germany

ISBN: (数字)9798331539498

ISBN: (纸本)9798331539504

Despite the increasing importance of medical robotics in modern healthcare, these complex, precise, and costly systems are nearly absent in practical teaching environments for engineering and technology students. We present a scalable and affordable hands-on experiment for undergraduates to address this gap, which teaches the fundamentals of this essential and rapidly growing technology through the example of a robotassisted liver biopsy. Using a custom 3D-printed robotic arm with parts costing less than USD 1,000, students are guided through tasks that begin with navigating the robotic arm's workspace and understanding its kinematics. They explore how rotational joint movement creates linear motion at the end-effector before using a biopsy needle with force measurement capabilities. Students program the robotic arm to perform a controlled needle insertion into a liver phantom, recording forces to distinguish between tissue layers and locate a tumor model. During the experiment, students are encouraged to experiment with different programming and data analysis methods. We conducted a transfer test to assess the effectiveness of our educational approach, in which students who completed the experiment performed the task 21 % faster than those who did not, despite 27% of the students having less prior experience in programming or robotics. This suggests increased engagement and improved application of the skills learned. By significantly reducing costs, this lab experiment enhances accessibility to medical robotics training, preparing students to address future challenges in healthcare.

关键词： Training Medical robotics Educational robots Biopsy Liver Medical services Needles Recording Programming profession Tumors

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Role of quantum technologies in reshaping the future of temperature metrology

Role of quantum technologies in reshaping the future of temp...

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作者： Ahmed, Zeeshan Sensor Science Division Physical Measurement Laboratory National Institute of Standards and Technology GaithersburgMD20899 United States

Today's resistance thermometers can routinely measure temperatures with uncertainties of >1 mK–100 mK over multiple decades of temperatures. As the modern economy continues to evolve, so does the measurement infrastructure. In recent years, there has been a considerable progress in the development of novel temperature sensing technologies driven by advances in quantum information science and nano-photonics. Quantum technologies in particular hold the promise of field-deployable primary thermometry whilst ultra-stable nanophotonic thermometers could displace resistance thermometers as commodity sensors. © 2021

关键词： Thermometers

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Simulation Study of Surface Acoustic Wave sensors for Soil Parameter Monitoring

Simulation Study of Surface Acoustic Wave Sensors for Soil P...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： Zhenyu Wu Tianqi Lu Ammar Al-Hamry Anurag Adiraju Ge Shi Siqi Liu Swaranpreet Kaur Surinder Singh Olfa Kanoun Professorship of Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Department of Physics Sant Longowal Institute of Engineering & Technology Longowal Sangrur Punjab India Department of Electronics and Communication Engineering Sant Longowal Institute of Engineering & Technology Longowal Sangrur Punjab India

ISBN: (数字)9798331542726

ISBN: (纸本)9798331542733

Soil parameters such as moisture, pH, and salinity are essential for agricultural productivity and environmental management. However, traditional monitoring methods, while accurate, are time-consuming and lack real-time capabilities, limiting their suitability for precision agriculture. Surface acoustic wave (SAW) sensors offer a promising alternative due to their high sensitivity, robustness, and real-time monitoring capabilities. In this study, a SAW sensor was designed and simulated using COMSOL Multiphysics to detect soil moisture. The sensor design employs a lithium tantalate piezoelectric substrate and interdigitated transducers (IDTs), with graphene oxide (GO) as a functional coating to enhance sensitivity. Simulation results showed that at a GO coating thickness of 350 nm, the sensor achieved the highest frequency shift at 70% relative humidity, demonstrating optimal sensitivity. Additionally, dynamic response analysis revealed that as humidity increased from 0% to 100%, the response time grew nonlinearly from 2.5 seconds to 42.2 seconds. The simulation results of the nonlinear growth trend of the optimal coating thickness and response time provide a clear direction for practical humidity sensor design optimization, dynamic environmental adaptation analysis, and future experimental validation and development. This study provides a theoretical foundation for the development of SAW-based soil sensors and outlines future directions for expanding functionality to monitor pH and salinity. Future work will focus on transitioning to 3D FEM models, experimental validation, and advanced material development. Fabricating actual sensors and validating simulations with experimental data will ensure reliability, supporting the broader application of SAW sensors in precision agriculture and environmental management.

关键词： Temperature sensors Precision agriculture Solid modeling Sensitivity Simulation Surface acoustic waves Humidity sensors Finite element analysis Monitoring

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Ultrastable, traceable optical frequencies for length metrology in long-range nanopositioning and nanomeasuring machines 22

Ultrastable, traceable optical frequencies for length metrol...

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22nd International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2022

作者： Blumröder, Ulrike Köchert, Paul Fröhlich, Thomas Füßl, Roland Ortlepp, Ingo Gerhardt, Uwe Mastylo, Rostyslav Flügge, Jens Bosse, Harald Manske, Eberhard Technische Universität Ilmenau Institute of Process Measurement and Sensor Technology Gustav-Kirchhoff-Str. 1 Ilmenau98693 Germany Precision Engineering Division Bundesallee 100 Braunschweig38116 Germany

ISBN: (纸本)9781998999118

Precise interferometric distance measurements play a crucial role in length measuring and positioning systems that provide resolving capabilities down to the sub-nm-range. Especially for applications in nanotechnology, length metrology has to face additional challenges due to increasing measurement ranges and traverse speed. Nanopositioning and measuring machines (NPMM) meet the demands on positioning with nm-accuracy over long measurement distances. Currently, the next generation of NPMMs (NPMM-200) provide a measuring range of 200 mm × 200 mm × 25 mm with a measuring repeatability up to 20 pm. This also sets new demands on the frequency stability of the laser sources used for interferometry. In this study we present two new approaches to create traceable, ultrastable optical frequencies at 633 nm that provide frequency stability below the electronic resolution limit of the interferometers (?s = 25.10-12) thus allowing to practically eliminate the influence of frequency distortions in the NPMM-200. Both approaches utilize an optical frequency comb to ensure traceability and long-term frequency stability. The first approach permanently couples the metrology lasers of the NPMM-200 to a comb line. The second approach is based on a diode laser stabilized to an ultrastable cavity. This allows to set up a frequency reference with enhanced-short-term frequency stability and high output power. Thus, in combination with the optical frequency comb a frequency stability better than 10-12independent on integration time is prospectively accessible. © European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Frequency stability

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A New Method to Determine the Shear Wave Speed and Attenuation Coefficient in Phantoms for Ultrasound Shear Wave Elastography

A New Method to Determine the Shear Wave Speed and Attenuati...

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IEEE Instrumentation and measurement technology Conference

作者： Zuyuan Wang Christian Kargel School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Sichuan Chengdu China Division of Sensor Technology and Measurement Systems Institute for Measurement and Automation Bundeswehr University Munich Neubiberg Germany

Ultrasound shear wave elastography is an effective imaging method for diagnosing abnormal tissues. It can provide spatially resolved tissue information like the shear wave speed $c$ s and the attenuation coefficient a, which depend on the (health) condition of the examined tissue. In this study we investigate a new method to determine c s and $a$ by using a homogenous tissue-mimicking agar phantom and taking into account the inevitable reflection at the phantom-air boundary. The experimental data are fitted in the least-squares sense to a model that is theoretically derived and accounts for a single reflected wave. The obtained $c$ s and $a$ are then used to calculate in a rheological model-independent fashion the shear storage modulus G’ and the shear loss modulus G“, which are often used in material testing, and together fully describe the behavior of a viscoelastic material. The G’ and G“ results are compared with those obtained using a standard rotational rheometer.

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A Double Node Thin-Film Thermocouples for In-Situ measurement

A Double Node Thin-Film Thermocouples for In-Situ Measuremen...

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2022 International Conference on Automation, Robotics and Computer Engineering, ICARCE 2022

作者： Ma, Rong Zhang, Meiju Zhang, Zhongkai Huang, Manguo Liang, Xiaobo Liu, Jiangjiang Liu, Zhaojun Tian, Bian Xi'An Jiaotong University State Key Laboratory for Mechanical Manufacturing Systems Engineering Xi'an China Aviation Key Laboratory of Science and Technology on Special Condition Monitoring Sensor Technology Beijing Changcheng Aeronautic Measurement and Control Technology Research Institute Beijing China

ISBN: (纸本)9781665475488

The design, fabrication, testing and implementation of a new high-performance tungsten-rhenium thin film thermocouple are introduced. In this paper, tungsten-rhenium TFTCs are taken as the research object, after simulation analysis in COMSOL software and design, it is made by screen-printing technology and magnetron sputtering. This kind of thin film thermocouple primarily utilizes two kinds of electrode materials with varying composition combination, mainly tungsten with 5% rhenium and tungsten with 26% rhenium. Furthermore, high-temperature annealing is performed to maintain the mechanical properties and thus improve thermoelectric performance. The results demonstrate that the performance is reliable in the temperature range of 150-600 C° with a repeatability of 2.02%, providing application value for high-temperature in-situ sensing. © 2022 IEEE.

关键词： Thermocouples

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