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

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Features Selection for Force Myography Based Hand Gesture Recognition

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

引用

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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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...

引用

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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Design Aspects for Eddy Current Displacement sensors in High Temperature Environments

Design Aspects for Eddy Current Displacement Sensors in High...

引用

IEEE sensorS

作者： G. Gruber M. Neumayer B. Schweighofer H. Wegleiter Christian Doppler Laboratory for Measurement Systems for Harsh Operating Conditions Institute of Electrical Measurement and Sensor Systems Graz University of Technology Inffeldgasse 33 Graz Austria

ISBN: (数字)9798350363517

ISBN: (纸本)9798350363524

The application of eddy current displacement sensors (ECDSs) for monitoring industrial processes has been studied. Industrial processes often present challenges due to harsh operating conditions. For example, sensors can be affected by high temperatures, dirt, dust, and humidity. These effects cause significant deviations in the measurement signal, necessitating the development of robust sensors. In this study, we present an approach for designing an ECDS suitable for high temperature environments with high temperature variations and varying humidity levels. Our approach addresses various aspects, including the selection of former materials, suitable winding techniques, and measurement frequencies, to develop a sensor system capable of accurately measuring large distances in such environments. We present lab measurements showing the feasibility of the proposed approach. The results provide a basis for reliable position measurement with ECDS in harsh environments.

关键词： Temperature measurement Temperature sensors Coils Inductance Current measurement Windings sensors Frequency measurement Inductance measurement Eddy currents

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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...

引用

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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Deciphering Anion Exchange Membrane Water Electrolysis: A Distribution of Relaxation Times Approach

Deciphering Anion Exchange Membrane Water Electrolysis: A Di...

引用

24th Symposium on Polymer Electrolyte Fuel Cells and Water Electrolyzers, PEFC and WE 2024, held at the PRiME 2024 Meeting

作者： Ranz, M. Grabner, B. Schweighofer, B. Wegleiter, H. Trattner, A. HyCentA Research GmbH Inffeldgasse 15 Graz8010 Austria Graz University of Technology Institute of Electrical Measurement and Sensor Systems Inffeldgasse 23 Graz8010 Austria Graz University of Technology Institute of Thermodynamics and Sustainable Propulsion Systems Inffeldgasse 19 Graz8010 Austria

ISBN: (纸本)9781623326630

Anion exchange membrane water electrolysis (AEM-WE) is a promising method for hydrogen production, offering advantages over proton exchange membrane water electrolysis (PEM-WE), such as the use of nonprecious metal catalysts and pertluoro sulfonic acid free membranes. Despite achieving impressive current densities, challenges in efficiency and stability remain. This study employs electrochemical impedance spectroscopy (EIS), the equivalent circuit model (ECM) and distribution of relaxation times (DRT) analysis to investigate AEM-WE cells. DRT analysis identifies and quantifies five loss mechanisms within the AEM-WE system, including hydrogen and oxygen evolution reactions and ionic transport losses. Long-term experiments reveal catalyst degradation and its impact on performance, providing insights for targeted optimisation. The findings enhance understanding of the electrochemical processes in AEM-WE, offering pathways to improve stability and efficiency. © The Electrochemical Society.

关键词： Nafion membranes

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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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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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Ice Sensing Using Combined Capacitive and Impedance Spectroscopic measurements

Ice Sensing Using Combined Capacitive and Impedance Spectros...

引用

IEEE sensorS

作者： M. Neumayer T. Bretterklieber Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria

Sensing of natural ice accretion comprises the detection of the start of an icing event and the measurement of the thickness of a grown ice layer. In this work we present a combined capacitive and impedance spectroscopic sensing approach for ice detection and thickness measurement. We show the realization of a small sized inter digitated electrode sensor for ice detection and discuss the sensing effects and propose a detector based on a phase evaluation scheme using off-the-shelf measurement ICs. For ice thickness measurement we demonstrate the design of sensors with a good linearity behavior with respect to the ice thickness.

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Noise and Uncertainty Analysis for Time and Frequency Domain Vibration measurements using Acceleration sensors

Noise and Uncertainty Analysis for Time and Frequency Domain...

引用

IEEE Instrumentation and measurement technology Conference

作者： M. Neumayer T. Bretterklieber Institute of Electrical Measurement and Sensor Systems Graz University of Technology Grau Austria

Displacement measurement systems based on acceleration sensors provide an interesting sensing approach for vibration monitoring. Hereby the displacement is computed by a double integration of the acceleration signals. The main challenge hereby are offset signals in the acceleration signal. Hence a lower cutoff frequency has to be determined for this sensing principle. However, not only DC components in the acceleration signal have to be considered, but also the measurement noise in the acceleration signal has to be taken into account. In this work we present a noise and uncertainty analysis for accelerometer based displacement measurement using a MEMS based sensor. We hereby investigate time domain and frequency domain displacement measurements. Theoretical results and comparative numerical studies are presented.

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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

IEEE Photonics Conference (IPC)

作者： Jakob Wilhelm Hinum-Wagner Jochen Kraft Victor Sidorov Samuel Hoermann Gandolf Feigl Alexander Bergmann Ams Osram Group Premstaetten Austria Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria

ISBN: (数字)9798350361957

ISBN: (纸本)9798350361964

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.

关键词： Semiconductor device measurement Micrometers Accuracy Lasers Photonic integrated circuits Metrology Assembly Surface treatment Standards Photonics

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