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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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A review on intelligent IoT systems design methodologies

A review on intelligent IoT systems design methodologies

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作者： Fredj, Nissaf Hadj Kacem, Yessine Khriji, Sabrine Kanoun, Olfa Abid, Mohamed Measurement and Sensor Technology Chemnitz University of Technology Germany CES Laboratory ENIS University of Sfax Tunisia CES Laboratory ENIS University of Sfax Tunisia

The design of distributed real-time systems including In- ternet of Things (IoT) systems is complex due to open-ended architectures requirements. An emergent solution to deal with this complexity and to manage system constraints is the integration of adaptation strategies in distributed devices behavior. The developement of such systems denotes a signifi-cant challenge on providing autonomous and intelligent ability to verify distributed devices behaviors and constraints such as battery storage of sensors. Existing AI-based approaches for dynamic IoT systems proposed solutions relative to the target system for resolving specific problems without consid-ering interoperability and reusability. Using MDE approach and UML/MARTE profile for high-level abstraction becomes a promising solution to ease the design of intelligent IoT systems. This paper recalls and classifies the existing AI and MDE-based works for the design of dynamic distributed systems especialy IoT applications. We concentrate on a set of criteria to highlight the shortages of existing approaches on the design of distributed devices interaction, adaptation and system constraints. Finally, we introduce our future directions to cope with the limits of existing solutions while taking into account the observed criteria. © 2021

关键词： Interoperability

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Two-Photon Direct Laser Writing Beyond the Diffraction Limit Using the Nanopositioning and Nanomeasuring Machine

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Nanomanufacturing and Metrology 2021年第3期4卷 149-155页

作者： Laura Mohr-Weidenfeller Annika-Verena Hacker Carsten Reinhardt Eberhard Manske Microsystems Technology Group Ilmenau University of TechnologyMax-Planck-Ring 12IlmenauGermany Institute for Process Measurement and Sensor Technology Ilmenau University of TechnologyGustav-Kirchhoff-Str.1IlmenauGermany Bremen University of Applied Science Neustadtswall 30BremenGermany

Since the first realization of two-photon direct laser writing(DLW)in Maruo et al.(Opt Lett 22:132-134,1997),the manufacturing using direct laser writing techniques spread out in many laboratories all over the *** materials with different material properties open a new field for micro-and *** achievable structuring resolution using this technique is reported to be sub-100 nm(Paz et *** *** Appl.24:042004,2012),while a smallest linewidth of 25 nm could be shown in Tan et al.(Appl Phys Lett 90:071106,2007).In our approach,the combination of DLW with the nanopositioning and nanomeasuring machine NMM-1 offers an improvement of the technique from the engineering side regarding the ultra-precise positioning(Weidenfeller et *** Adv Fabr Technol Micro/Nano Opt Photon Ⅺ 10544:105440E,2018).One big benefit besides the high positioning resolution of 0.1 nm is offered by the positioning range of 25 mm×25 mm×5 mm(Jager et *** Technisches Messen 67:319-323,2000;Manske et *** Meas Sci Technol 18:520-527,2007).Thus,a trans-scale fabrication without any stitching or combination of different positioning systems is *** immense synergy between the highly precise positioning and the DLW is demonstrated by the realization of resist lines and trenches whose center-to-center distance undergoes the modified diffraction limit for two-photon *** precise positioning accuracy enables a defined distance between illuminated ***,with a comparable huge width of the trenches of 1.655|im due to a low effective numerical aperture of 0.16,a resist line of 30 nm between two written trenches could be *** the interrelationships for achieving such narrow trenches have not yet been clarified,much smaller resist lines and trench widths are possible with this approach in the near future.

关键词： Direct laser writing Nanopositioning and nanomeasuring machine Two-photon absorption Laser power controlling

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Further Development of a Magnet System for Planck Balance Applications

Further Development of a Magnet System for Planck Balance Ap...

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Conference on Precision Electromagnetic measurements (CPEM)

作者： Markus Pabst Falko Hilbrunner Thomas Fröhlich Institute of Process Measurement and Sensor Technology TU Ilmenau Ilmenau Germany Department Mass Comparators Sartorius Lab Instruments GmbH&Co.KG Göttingen Germany

ISBN: (数字)9798350361049

ISBN: (纸本)9798350361056

An important part of a Planck, or Kibble balance, is the magnet system. It serves as an actuator in force mode and as a sensor in velocity mode. The performance of the magnet system in Planck balances is essential for mass calibration according to the International System of Units of 2019 [1]. This paper describes the further development of a lightweight magnet system for use in the Planck extension for high-precision vacuum mass comparators [4]. Based on the experience gained from investigations with a prototype magnetic system of the Planck extension, a further development of the magnetic system using simulation methods is presented.

关键词： Coils Vacuum systems Electromagnetic measurements Computational modeling Force Prototypes Gain measurement

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Monolithic Wideband Air-Coupled Ultrasonic Transducer Based on Additively Manufactured Ferroelectrets

Monolithic Wideband Air-Coupled Ultrasonic Transducer Based ...

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IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Alexander A. Altmann Sven Suppelt Max Ruhl Stephan Schaumann Bastian Latsch Omar Ben Dali Sergey Zhukov Dennis Flachs Xiaoqing Zhang Christiane Thielemann Heinz Von Seggern Mario Kupnik Measurement and Sensor Technology Group Technische Universität Darmstadt Germany Faculty of Engineering Technische Hochschule Aschaffenburg Germany Electrets and Functional Dielectric Group Tongji University China

ISBN: (数字)9798350371901

ISBN: (纸本)9798350371918

Air-coupled ultrasonic transducers are widely used in non-destructive testing, acoustical sonar systems, and biomedical imaging. These applications require transducers that operate effectively across a broad acoustic frequency spectrum, offer adaptable geometric designs, and increasingly incorporate eco-friendly materials. In this work, we present a monolithic, 3D-printed air-coupled ultrasonic transducer based on ferroelectrets (FEs) and fabricated from biocompatible polylactic acid (PLA). We evaluated the transducer’s acoustical performance by measuring the surface velocity of its active area using laser Doppler vibrometry and assessed its robustness during continuous operation over a 19-day period. Additionally, we measured the sound pressure level (SPL) and wideband characteristics in an anechoic chamber across excitation frequencies from 1kHz to 100kHz. At a resonance frequency of 33kHz, our transducer achieved an SPL of 94.3dB and surface velocities up to 37mm/s. The measured bandwidth of 65.2kHz at the -6dB threshold corresponds to a fractional bandwidth of 189%. The observed exponential decay of the surface velocity, stabilizing at 15% of its initial amplitude, aligns with the isothermal surface potential decay typically observed in FE films made from PLA. These results demonstrate the effectiveness of the transducer, which features an adaptable backplate for tuning acoustic properties. The low-cost transducer, manufactured from biocompatible PLA, is particularly suited for imaging and biomedical applications furthering green electronics.

关键词： Ultrasonic transducers Transducers Ultrasonic variables measurement Resonant frequency Biomedical measurement Acoustics Iron Resonance Wideband Biomedical imaging

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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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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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Interface Modification of TiO_(2)Electron Transport Layer with PbCl_(2)for Perovskiote Solar Cells with Carbon Electrode

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Tsinghua Science and technology 2022年第4期27卷 741-750页

作者： Abolfazl Amraeinia Yuhua Zuo Jun Zheng Zhi Liu Guangze Zhang Liping Luo Buwen Cheng Xiaoping Zou Chunbo Li Key Laboratory on Integrated Optoelectronics Institute of SemiconductorChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for SensorMOE Key Laboratory for Modern Measurement and Control TechnologyBeijing Information Science and Technology UniversityBeijing 100101China School of Science Minzu University of ChinaBeijing 100081China

Perovskite Solar Cells(PSCs)have attracted considerable attention because of their unique features and high ***,the stability of perovskite solar cells remains to be *** this study,we modified the TiO_(2)Electron Transport Layer(ETL)interface with PbCl_(2).The efficiency of the perovskite solar cells with carbon electrodes increased from 11.28%to 13.34%,and their stability obviously *** addition of PbCl_(2)had no effect on the morphology,crystal structure,and absorption property of the perovskite absorber ***,it affected the band energy level alignment of the solar cells and accelerated the electron extraction and transfer at the interface between the perovskite layer and the ETL,thus enhancing the overall photovoltaic *** interfacial modification of ETL with PbCl_(2)is a promising way for the potential commercialization of low-cost carbon electrode-based perovskite solar cells.

关键词： Perovskite Solar Cell(PSC) Electron Transport Layer(ETL) electron and hole recombination modification stability

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Hysteresis Compensation in Temperature Response of Fiber Bragg Grating Thermometers Using Dynamic Regression

arXiv

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arXiv 2023年

作者： Ahmed, Zeeshan National Institute of Standards and Technology Physical Measurement Laboratory Sensor Science Division 100 Bureau Drive GaithersburgMD20899 United States

In recent years there has been considerable interest in using photonic thermometers such as Fiber Bragg grating (FBG) and silicon ring resonators as an alternative technology to resistance-based legacy thermometers. Although FBG thermometers have been commercially available for decades their metro-logical performance remains poorly understood, hindered in part by complex behavior at elevated temperatures. In this study we systematically examine the temporal evolution of the temperature response of 14 sensors that were repeatedly cycled between 233 K and 393 K. Data exploration and modelling indicate the need to account for serial-correlation in model selection. Utilizing the coupled-mode theory treatment of FBG to guide feature selection we evaluate various calibration models. Our results indicates that a dynamic regression model can effectively reduce measurement uncertainty due to hysteresis by up to ≈ 70% . © 2023, CC BY-NC-ND.

关键词： Fiber Bragg gratings

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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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