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检索条件"机构=Measurement and Sensor Technology Department"

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Calibration of the stiffness of soft cantilevers based on electromagnetic and electrostatic force compensation principles

Calibration of the stiffness of soft cantilevers based on el...

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作者： Cherkasova, Valeriya Li, Zhi Popadic, Radovan Froehlich, Thomas Brand, Uwe Institute of Process Measurement and Sensor Technology Technische Universität Ilmenau Ilmenau Germany Department 5.1 Surface Metrology Physikalisch-Technische Bundesanstalt PTB Braunschweig Germany

This article presents a modified version of a traceable force-displacement measurement device developed at TU Ilmenau. The calibration of forces is carried out by a balance with the electromagnetic and electrostatic principles of force compensation. As part of this study, the device was used to calibrate the stiffness of soft cantilevers. The expanded relative uncertainty of the measured stiffnesses in the range from 13 mN/m to 100 mN/m ranged from 1.5 % to 2.7 %. The device was also verified through two-way comparison of measurements with the PTB, good agreement was obtained. © 2024

关键词： Electrostatic force

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CENTRE OF GRAVITY MEASURING DEVICE 24

CENTRE OF GRAVITY MEASURING DEVICE

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24th IMEKO TC3 Conference on measurement of Force, Mass and Torque 2022, Together with the 14th TC5 Conference on the measurement of Hardness, the 6th TC16 Conference on Pressure and Vacuum measurement, and the 5th TC22 Conference on Vibration measurement

作者： Pabst, M. Fröhlich, T. Technical University of Ilmenau Department of Mechanical Engineering Institute of Process Measurement and Sensor Technology Process Measurement Technology Group Ilmenau Germany

ISBN: (纸本)9781713870203

This paper describes a new method to measure the height of the centre of gravity of high-sensitive mass artefacts. A measuring device is presented and tested with mass samples of various shapes and densities. The results of the measurements are compared to the geometrical estimated heights of the centre of gravity and further developments of the new instrument are presented. © 2023 *** All Rights Reserved.

关键词： Comparators (optical)

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Telemetric position sensing using resonant frequency parametrization of a millimeter-wave metamaterial

Telemetric position sensing using resonant frequency paramet...

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sensors and Communication Technologies in the 1 GHz to 10 THz Band 2024

作者： Töfferl, Michael Schossmann, A. Schmidt, C. Banzer, P. Bergmann, A. Graz University of Technology Department of Electrical Measurement and Sensor Systems Inffeldgasse 33/I GrazA-8010 Austria University of Graz Department of Physics Universitätsplatz 5 GrazA-8010 Austria

ISBN: (纸本)9781510681149

Due to its ability to meet requirements such as e.g. telemetry, millimeter-wave transceiver technology has gained research interest for various sensor applications, including the automotive and consumer sector. This work presents a resonant metamaterial for millimeter-waves that enables telemetric position sensing. The concept is based on a resonant unit cell that can be tuned to enable position encoding. A 2D metamaterial design was developed to parametrize the resonance frequency via a geometric parameter of the structure. The tuneable range of the metamaterial was estimated using a finite element method (FEM) simulation. This allowed for a unique mapping of resonance frequency and the geometric parameter, where a linear range for the sensor effect was selected. The resonance frequency shift encodes the absolute position via the geometry parameter of the metamaterial. A linear position encoded bar was fabricated using well-known PCB manufacturing techniques for position determination. The position encoded metamaterial was successfully tested with a vector network analyser under lab conditions. This telemetric position sensor concept offers a compact and contactless readout without mechanical interference with the moving object. The metamaterial is completely passive, resulting in low maintenance and failure issues. The overall sensor concept includes a state-of-the-art radar chip as millimeter-wave transceiver which is currently under development. © 2024 SPIE.

关键词： metamaterial millimeter-wave position sensing

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New Sartorius mass comparator for highest accuracy including fully automatic vacuum transfer system

New Sartorius mass comparator for highest accuracy including...

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作者： Hilbrunner, Falko Schreiber, Mario Fröhlich, Thomas Fehling, Thomas Schwesinger, Folker Krapf, Gunter Sartorius Lab Instruments GmbH & Co. KG Mass Comparators Department Göttingen37079 Germany Institute of Process Measurement and Sensor Technology TU Ilmenau Ilmenau98684 Germany

Sartorius cooperated with Technische Universität Ilmenau to develop the innovative automatic mass comparator VMC1007. This facilitates highly accurate mass comparisons of weights between 100 g and 1 kg under controlled atmospheric conditions, and in a vacuum. For permanent storage of weights under vacuum conditions, the mass comparator can optionally be configured with a vacuum transfer system and corresponding containers. The device is very compact, has eight universal positions for directly handling weights of different shapes and allows for precise and fast mass comparisons. In order to make the processes for inserting and ejecting weights as simple and safe as possible, all mechanical movement axes are motorised. Mass comparisons can be controlled, monitored and analysed easily and irrespective of the operating system using web-based user interface. In all processes, the user is intuitively guided through the individual steps to enable safe, efficient and convenient work. © 2024

关键词： Comparators (optical)

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Analytical Description of Transversally Symmetric Hinges with Semicircular Contours 16th

Analytical Description of Transversally Symmetric Hinges wi...

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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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Investigation of PDMS-CNT Nanocomposite for Flexible Interconnects

Investigation of PDMS-CNT Nanocomposite for Flexible Interco...

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

作者： Ahmed Attaoui Dhivakar Rajendran Jose Mauricio Rosolen Olfa Kanoun Chair for Measurement and Sensor Technology University of Technology Chemnitz Germany Chair for Measurement and Sensor Technology Chemnitz University of Technology Germany Department of Chemistry University of Sao Paulo FFCLRP Ribeirao Preto Brazil

ISBN: (数字)9798350374131

ISBN: (纸本)9798350374148

In this study, novel strategies are being explored to enhance composite material for flexible interconnects, particularly for temperature sensors in battery housing system applications. The study investigates the influence of material composition and fabrication process optimization on the electrical properties of the nanocomposites. The study aims to compare the effects of different amounts of carbon nanotubes (CNTs) in the PDMS matrix and the introduction of CB and graphene into CNT/PDMS composite. Analyzing the influence of carbonaceous material ratios on conductivity under different fabrication parameters. Composite homogeneity is assessed, and resistance is measured across a temperature range of 30°C to 70°C. In addition, stability analysis is performed to study the resistance changes over time in the nanocomposite thin film. This comprehensive investigation is aimed to improve the understanding of these materials and their suitability for various applications, including interconnects for temperature sensors in battery housing, with the goal of improving the safety, reliability and lifetime of energy storage systems.

关键词： Temperature sensors Resistance Fabrication Temperature measurement Nanocomposites Graphene Conductivity

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Comparative Study of Transmitter and Resonator Coils for Wireless Power Transfer 19

Comparative Study of Transmitter and Resonator Coils for Wir...

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19th IEEE International Multi-Conference on Systems, Signals and Devices, SSD 2022

作者： Adawy, Abdallah Bouattour, Ghada Ibbini, Mohammed Kanoun, Olfa Chemnitz University of Technology Electrical Engineering and Information Technology Department Chemnitz Germany Chemnitz University of Technology Chair Measurement and Sensor Technology Chemnitz Germany

ISBN: (数字)9781665471084

ISBN: (纸本)9781665471084

Multi-coil wireless power transfer WPT systems have a lot of benefits compared to single coil WPT systems in the terms of power capacity, power transfer efficiency, and free position. In this paper, a comparative study of two different types of multi-coil WPT systems is proposed. The first system contains three transmitter coils on the primary side, while the other system contains one transmitter coil and two resonator coils. Both multi-coil WPT systems are studied in three different cases. The resonator coils lead to higher output power in addition to system efficiency when the receiver has misalignment with transmitter coils. When the receiver coil is aligned with the transmitter coil, resonator coils can decrease the output power and power transfer efficiency. The multi-coil WPT systems are working at a frequency of 6.78 MHz. Resonator coils are also designed under the operating resonance frequency. © 2022 IEEE.

关键词： Inductive power transmission

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Features Selection for Force Myography Based Hand Gesture Recognition

Features Selection for Force Myography Based Hand Gesture Re...

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2023 IEEE Jordan International Joint Conference on Electrical Engineering and Information technology, JEEIT 2023

作者： Fora, Malak Jaradat, Manar Atitallah, Bilel Ben Wu, Congyu Kanoun, Olfa State University of New York Department of Systems Science and Industrial Engineering Binghamton United States Technische Universität Chemnitz Professorship of Measurement and Sensor Technology Chemnitz Germany

ISBN: (纸本)9798350324051

Hand gesture recognition has a wide range of applications in robotics, game control, and in communication with the deaf and people with trouble hearing. Recognition of American sign language (ASL) hand gestures has been extensively studied in the literature. Multiple data sources and different features extracted from these data were used to classify ASL gestures. In this study, we examined the features used in previous research to determine the minimum number of features that can give an accurate classification of ASL hand gestures. Force myography (FMG) signals captured for ASL gestures of digits 0-9 were used in this analysis of the selected features. Extracted features from the raw FMG signals were applied to K-nearest neighbors (KNN) and Extreme Learning Machine (ELM) to evaluate their efficiency in identifying the corresponding hand gesture. Results show that using only the mean value as input to classification algorithms yields the highest classification accuracy. The classification accuracy was 90% and 96.9% for KNN and ELM, respectively. © 2023 IEEE.

关键词： Audition

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Simulation Study of Surface Acoustic Wave sensors for Soil Parameter Monitoring 22

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

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22nd IEEE International Multi-Conference on Systems, Signals and Devices, SSD 2025

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

ISBN: (纸本)9798331542726

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. © 2025 IEEE.

关键词： COMSOL Multiphysics Simulation Finite Element Analysis Precision Agriculture Soil Parameter Detection Surface Acoustic Wave sensors

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Vulnerabilities and Challenges in the Development of PUF-Based Authentication Protocols on FPGAs: A Brief Review 7

Vulnerabilities and Challenges in the Development of PUF-Bas...

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7th IEEE Conference on Dependable and Secure Computing, DSC 2024

作者： Yavuz, Sinan Naroska, Edwin Daniel, Kai University of Siegen Department of Electrical Engineering and Computer Science Siegen Germany Niederrhein University of Applied Sciences Department of Electrical Engineering and Computer Science Krefeld Germany Institute of Measurement and Sensor Technology University of Applied Sciences Ruhr West Mülheim Germany

ISBN: (纸本)9798331540289

The security of IoT (Internet of Things) devices and the protection of sensitive information processed by these devices such as personal data, sensor values, process-related information is an important and difficult challenge. A major task in IoT communication is secure identification of devices. Unfortunately, traditional cryptographic methods are often not suitable for IoT devices due to their limited hardware resources. However, typical methods are computationally intensive, require a large amount of memory, and have a high-power consumption. On the other hand, Physical Unclonable Functions (PUFs) are low-cost and lightweight hardware-based primitives that can be used as a security component to protect data against third parties and thus increase security of a device. In this paper, the challenges and vulnerabilities in the development of PUF-based authentication protocols are presented. To this end, a security analysis of different approaches known from literature are discussed. Furthermore, possible attack vectors and prevention techniques are also considered. © 2024 IEEE.

关键词： Authentication Protocol

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