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2023 IEEE International Ultrasonics Symposium, IUS 2023

作者： Swaschnig, Patrick Klambauer, Reinhard Kofler, Johannes Bergmann, Alexander Graz University of Technology Institute of Electrical Measurement and Sensor Systems Graz Austria Tdk Electronics GmbH & Co Og European R&d Center Deutschlandsberg Austria

ISBN: (纸本)9798350346459

This study investigates symmetrical Lamb wave behavior across varying state-of-charge levels in lithium-ion batteries. Utilizing piezoelectric transducers, the research focuses on inducing and detecting Lamb waves in lithium-ion batteries. The outcomes uncover correlations between Lamb wave characteristics and state-of-charge variations, revealing insights into the potential of Lamb waves as indicators of internal changes in battery structures. Furthermore, the influence of chemomechanical alterations within battery structures on Lamb wave properties is explored. The insights gained offer valuable implications for understanding battery performance dynamics and internal transformations. © 2023 IEEE.

关键词： Surface waves

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Investigations on the tracking control and performance of a long stroke vertical nanopositioning drive 22

Investigations on the tracking control and performance of a ...

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

作者： Huaman, Alex S. Gorges, Stephan Katzschmann, Michael Hesse, Steffen Fröhlich, Thomas Manske, Eberhard Ilmenau98693 Germany Institute of Process Measurement and Sensor Technology Technische Universität Ilmenau Ilmenau98693 Germany

ISBN: (纸本)9781998999118

This paper presents an approach to equip an existing planar nanoprecision drive system with specially designed lifting and actuating units (LAUs), which can lift several kilograms along a vertical stroke of 10 mm with nanometer precision. These modules contain a pneumatic actuator to counteract the weight force along the entire travel range without introducing significant heat into the measurement space. An additional parallel acting electromagnetic actuator provides the precision positioning forces. As an initial step toward a full 6D system, each LAU is set up individually on a test bench. Using an included laser interferometric measurement system and emulated loads, allows for the development and evaluation of different control strategies within the simulation framework and via real-time experiments. Designing a controller for a single LAU involves an in-depth research into its overactuated nature and the derivation of a detailed model of the drive as well as the motion system. The proposed control strategy achieves subnanometer precision by integrating a feedforward stage for trajectory tracking and an output-feedback stage for stabilization and disturbance rejection. In this context, the output-feedback controller highlights a composite state and disturbance observer. In order to accomplish an adequate tradeoff between performance and robustness, the controller tuning is performed in the time and frequency domain based on systematic LQR/LQG design methods. The effectiveness of the presented control strategy is verified via real-time experimentation, where the overall control scheme allows RMS positioning errors below 0.3 nm which seem to be dominated by the measurement noise. Moreover, it renders very low heat dissipation of about 54 nW to carry a 4 kg payload. © European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Nanotechnology

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Range Revolved Interferometry for use in high precision positioning systems 39

Range Revolved Interferometry for use in high precision posi...

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39th Annual Meeting of the American Society for Precision Engineering, ASPE 2024

作者： Grabowski, Axel Mittag, Sven Walenda, Carolin Kissinger, Thomas SE & Co. KG Auf der Roemerstrasse 1 Karlsruhe76228 Germany Institute for Process Measurement and Sensor Technology Technical University of Ilmenau Gustav-Kirchhoff-Str. 1 Ilmenau98693 Germany

ISBN: (纸本)9781887706612

We presented here a new fiber-based interferometer technology in a functional sample usable for industrial applications. We have shown an evaluation of the basic properties like positional noise, linearity and stability over 64 hours of measuring time. The unique features of the data processing scheme enable the system to measure with very low periodic errors. Additionally, it has been proven that the detection of more than one surface is doable and even further, that it is capable of measuring and tracking the thickness of optical transparent systems. Furthermore, it is possible to use the system in cryogenic environments. This has been demonstrated by characterizing different piezoelectric materials in a temperature range between room temperature and 4K. The form factor of the sensor heads is very small, enabling the construction of very compact piezo stages. © 2024 Proceedings - ASPE 2024 Annual Meeting. All rights reserved.

关键词： Piezoelectric materials

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Combination of pipette aspiration and OCT: A novel method for frequency-dependent elasticity assessment of silicone tissue phantoms

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measurement: sensors 2025年 38卷

作者： Lamprecht, Raphael Scheible, Florian Sutor, Alexander Institute of Measurement and Sensor Technology UMIT TIROL – Private University for Health Sciences and Health Technology Hall in Tirol Austria

Measuring the frequency-dependent material properties of soft tissues is a challenging task, but it is crucial to understanding their function. This work presents a novel setup that combines optical coherence tomography and dynamic pipette aspiration to simultaneously measure the dynamic Young's modulus and high-resolution optical coherence tomography images. The procedure applies a sinusoidal pressure fluctuation to silicone tissue phantoms of varying stiffness and analyses the optical coherence tomography images to determine the resulting displacement. The Young's modulus is calculated by normalizing the pressure and displacement data to the pipette radius. This approach accurately measures Young's modulus and reveals its frequency dependence. This novel technique paves the way for future investigations into microscale tissue mechanics and a deep analysis of the tissue properties. © 2024

关键词： Phantoms

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Towards a System for Remote Emission Sensing Utilizing TDLAS for Concentration measurement: A Promising Approach for Accurate and Direct Emission measurements

Towards a System for Remote Emission Sensing Utilizing TDLAS...

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IEEE sensorS

作者： Paul Schaffer Hafiz Hashim Imtiaz Benjamin Lang Martin Kupper Alexander Bergmann Institute of Electrical Measurement and Sensor Systems University of Technology Graz Austria

This work presents a system for remote emission sensing (RES), focusing on the design and simulation-based evaluation of a Tunable Diode Laser Absorption Spectroscopy (TDLAS). The system aims to measure CO 2 emissions over a 10 m pathlength using targeted absorption lines in the 1601.0 nm to 1601.6 nm wavelength range. Simulations demonstrate the feasibility of accurately determining gas concentration and temperature with minimal errors. We also explore the application of wavelength modulation spectroscopy (WMS) for enhanced sensitivity, favoring the balanced detection scheme over the single photodetector setup. These findings lay the groundwork for a laboratory setup and future research on expanding the system to measure additional analytes relevant to RES.

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A Gas Imaging sensor System of Automotive Exhaust Plumes for Remote Emission Sensing Application Basing on Schlieren Imaging An Approach to Visualize and Size Vehicle Exhaust Plumes

A Gas Imaging Sensor System of Automotive Exhaust Plumes for...

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IEEE sensorS

作者： Hafiz Hashim Imtiaz Paul Schaffer Martin Kupper Alexander Bergmann Institute of Electrical Measurement and Sensor Systems University of Technology Graz Austria

In this work we present a system for remote emission sensing (RES), focusing on a system for optical gas imaging, to enable direct concentration measurements by a Tunable Diode Laser Absorption Spectroscopy (TDLAS) technique. The technique is basing on background oriented schlieren imaging to give a robust information of the exhaust plume size, thus the absorption length of the laser. We present the description of the system, our approach of AI-based image processing and verification results. The gas imaging system was tested on-road and characterized in lab with controlled gas mixtures. First results from lab characterization and on-road measurements prove the feasibility of the approach, i.e. exhaust plumes of passing cars are reliably detected and the sizes of plumes are then calculated appropriately.

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CAPACITIVE CALIBRATION CAPABILITIES IN AN EMFC BALANCE 24

CAPACITIVE CALIBRATION CAPABILITIES IN AN EMFC BALANCE

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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： Cherkasova, V. Fröhlich, T. Institute for Process Measurement and Sensor Technology Technische Universität Ilmenau PF 10 05 65 Ilmenau98684 Germany

ISBN: (纸本)9781713870203

The article describes the possibilities of calibrating the force constant in an electromagnetic force compensation (EMFC) load cell using the electrostatic force compensation principle. The static and dynamic principles of calibration of the Kibble balance for the electrostatic force constant, as well as calibration by means of compensation of the electrostatic force by the electromagnetic force, are considered. The combination of the two compensation principles in the load cell allows the measurement of forces in the range of 20 pN to 2.2 mN and ensures traceability to national standards. The relative uncertainty in the measurement of forces of about 100 nN is estimated to be about 0.001. © 2023 *** All Rights Reserved.

关键词： Calibration

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Data Protection Regulation Compliant Dataset Generation for LiDAR-Based People Detection Using Neural Networks

Data Protection Regulation Compliant Dataset Generation for ...

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2024 IEEE International Conferences of AI, Science, Engineering, and technology, AIxSET 2024

作者： Haas, Lukas Zedelmeier, Johann Bindges, Florian Kuba, Matthias Zeh, Thomas Jakobi, Martin Koch, Alexander W. Institute for Driver Assistance Systems and Connected Mobility Kempten University of Applied Sciences Germany Institute for Measurement Systems and Sensor Technology Technical University of Munich Germany Blickfeld GmbH Munich Germany Kempten University of Applied Sciences Faculty of Electrical Engineering Germany

ISBN: (纸本)9798350390995

The use of LiDAR sensor technology for people detection offers a significant advantage in terms of data pro-tection. In LiDAR point clouds, unlike camera images, people can be detected but not identified without further information. LiDAR sensors are, therefore, particularly suitable for detecting people in publicly accessible places and reacting accordingly to the number of people, for example, with on demand services at airports. Due to the anonymity of people in LiDAR point clouds, personal data is protected, and approval for implementing such a detection system is simpler than that of comparable camera systems. In this paper, we present a measurement setup that covers the configuration of the sensor setup, the creation of a dataset for training neural networks for object detection, and the object detection itself. The measurement setup generates an average of 2408 automatically labeled point clouds per sensor, per hour. The SECOND network trained with this dataset achieves average precision for the intersection over union of the 2D view with a threshold of 0.5 of 87.67 %, the PV-RCNN of 85.74 % and an average precision for the average orientation similarity with a threshold of 0.5 of 89.56 %, and for the PV-RCNN of 87.81 %. © 2024 IEEE.

关键词： Anonymity

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Test bench for the investigation of road temperature measurement

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measurement: sensors 2025年 38卷

作者： Marin, Sebastian Fröhlich, Thomas Augustin, Silke Schalles, Marc Krapf, Gunter Beerel, Joseph Technische Universität Ilmenau Institute of Process Measurement and Sensor Technology IlmenauPF 100 565 Germany

The road temperature is used as an indicator for the winter maintenance service. Consequently, it should be determinated within a known measurement uncertainty. Investigations in road weather stations revealed inconsistencies in the evaluation of the road temperature according to different measurement principles. In order to systematically investigate the differences that occurred in the measured road surface temperature, a test bench that enables simulation of the road temperature and the ambient conditions was built. This test bench will be presented in this article. © 2024

关键词： Surface temperature

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Design of a Thermal Battery Dummy with Integrated sensor Node

Design of a Thermal Battery Dummy with Integrated Sensor Nod...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Michael Grubmüller Bernhard Schweighofer Hannes Wegleiter Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria

High-performance Li-ion battery systems require sophisticated thermal management to ensure safe operation and long battery life. Testing such thermal management systems comes with some disadvantages and safety concerns. For this reason, the use of thermal battery dummies is advantageous. In this work, we present the design of a thermal battery dummy with 26650 cylindrical cell geometry with an integrated sensor node. The control of the heating power and the temperature measurement is done inside the dummy cell. Power supply and communication with a test bench computer are done through the supply lines. Thus, the only cell connections are the battery terminals, resulting in a dummy cell with geometric characteristics equivalent to a real Li-ion cylindrical cell. This and an addressing-based communication protocol allows parallel operation of multiple battery dummies in a dummy pack compound. The design of the thermal parameters is based on preceding thermal measurements on a real battery cell; in the following we explain the concept of the thermal dummy and go into more detail on the main electronic circuits. With final measurements on a prototype we show the achieved properties of the thermal dummy.

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