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Fabrication and characterisation of La0.8Sr0.2CrO3-ITO thermocouples for high-temperature sensing

International Journal of Nanomanufacturing 2022年第1期18卷 1-8页

作者： Chen, Bohan Huang, Manguo Zhang, Meiju Liang, Xiaobo Liu, Dan Wang, Lingyan Niu, Gang Zhang, Zhongkai Tian, Bian Shi, Peng Ren, Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric Research School of Electronic and Information Engineering Xi’an Jiaotong University Xi’an710049 China Beijing Changcheng Aeronautic Measurement and Control Technology Research Institute Beijing101111 China Aviation Key Laboratory of Science and Technology on Special Condition Monitoring Sensor Technology Beijing101111 China State Key Laboratory for Mechanical Manufacturing Systems Engineering School of Mechanical Engineering Xi’an Jiaotong University Xi’an710049 China

La0.8Sr0.2CrO3-ITO thermocouples were successfully fabricated by screen printing. The La0.8Sr0.2CrO3 powder used for screen printing was obtained by the sol-gel method. The highest thermal voltage output was maintained at 270 mV at 1270°C. The microstructure of La0.8Sr0.2CrO3 and ITO electrode films were analysed by SEM. Thermoelectric response test was implemented to measure the performance of La0.8Sr0.2CrO3-ITO thermocouple by three times of thermal cycles. The results indicated that La0.8Sr0.2CrO3-ITO thermocouple showed good stability at high temperature. Copyright © 2022 Inderscience Enterprises Ltd.

关键词： Screen printing

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Design of an Energy Efficient sensor Node for Wearable Applications

Design of an Energy Efficient Sensor Node for Wearable Appli...

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IEEE Instrumentation and measurement technology Conference

作者： Abdallah Adawy Achraf Djemal Lidu Wang Ghada Bouattour Ahmed Fakhfakh Olfa Kanoun Measurement and Sensor Technology Faculty of Electrical Engineering and Information Technology Chemnitz University of Technology Chemnitz Germany Laboratory of Signals Systems Artificial Intelligence and Networks Digital Research Centre of Sfax National School of Electronics and Telecommunications of Sfax Technopole of Sfax Tunisia Measurement and Sensor Technology in Production Engineering Leuphana University Lüneburg Germany

ISBN: (数字)9798350380903

ISBN: (纸本)9798350380910

The demand for compact and low-power sensor nodes (SNs) as wearable devices has increased significantly as they contribute significantly to the monitoring of people's health status, providing valuable information for the treatment of various diseases. To address this issue for epilepsy diagnosis, we propose an energy-efficient SN design. The SN incorporates both accelerometer and gyroscope sensors monitoring movements and can be easily attached to an electromyography (EMG) sensor monitoring muscle activities. An internal contact socket allows seamless integration of both devices. The designed system has been tested on a healthy subject and has demonstrated high-quality data measurement. The SN uses low-power Bluetooth 5.0 to communicate with the mobile application, which is designed to modify the built-in sensor parameters and monitor sensor output in real-time. It has an average current consumption of 14.3 mA. In addition, all data from the developed system can be stored on an attached SD card, providing a reliable storage solution.

关键词： Accelerometers Wireless sensor networks Three-dimensional displays Epilepsy Electromyography Real-time systems Energy efficiency

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Enhanced Dielectric and Mechanical Properties of PVDF-HFP/Zn-BCZT Composite 19

Enhanced Dielectric and Mechanical Properties of PVDF-HFP/Zn...

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

作者： Ayed, Amina Ben Bouhamed, Ayda Abdelmoula, Najmeddine Khemakhem, Hamadi Kanoun, Olfa Faculty of Sciences of Sfax University of Sfax Laboratory of Multifunctional Materials and Application Sfax Tunisia Professorship of Measurement and Sensor Technology Chemnitz Germany Department of Electrical Engineering and Information Technology Chemnitz University of Technology Chemnitz Germany

ISBN: (数字)9781665471084

ISBN: (纸本)9781665471084

The use of flexible and environmentally friendly materials to replace lead materials-based energy harvesters could lead to a big breakthrough in wearable electronics. Polymeric composites including organic polymer and inorganic nanoparticles are suitable candidates. To this aim, lead-free Zinc doped Ba0.85Ca0.15Zr0.10Ti0.90O3 (Zn-BCZT) nanoparticles were produced using a sol-gel technique and embedded into a polymer matrix (PVDF-HFP) (poly(vinylidene fluoride cohexafluoropropylene) via solution casting process in N, N-dimethylformamide (DMF) solvent with different ratio in order to enhance their electrical, and mechanical properties. The results illustrate that the real part of permittivity increased as a function of solvent volume and the tangent loss tends to increase. The Young's modulus is increased with the addition of solvent from 226 to 319 MPa and tensile strength increased from 13.5 to 17.5 MPa as well. The improved tensile were may attributed to the uniform dispersion and good interfacial interaction between PVDF-HFP polymer and Zn-BCZT particles. The findings show that solvent has an influence on the modification of dielectric and mechanical characteristics. © 2022 IEEE.

关键词： Dimethylformamide

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Reducing Injections in Low-Power Electrical Impedance Tomography for Hand Sign Recognition 17

Reducing Injections in Low-Power Electrical Impedance Tomogr...

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17th International Workshop on Impedance Spectroscopy, IWIS 2024

作者： Ghoul, Bilel Barioul, Rim Hafsa, Mariem Sahnoun, Salwa Fakhfakh, Ahmed Kanoun, Olfa Chemnitz University of Technology Faculty of Electrical Engineering and Information Technology Measurement and Sensor Technology Chemnitz09126 Germany National School of Electronics and Telecommunications of Sfax Technopole of Sfax Laboratory of Signals Systems Artificial Intelligence and Networks Digital Research Centre of Sfax Ons City 3021 Tunisia Université de Sousse Ecole Nationale d'Ingénieurs de Sousse LATIS- Laboratory of Advanced Technology and Intelligent Systems Sousse4023 Tunisia

ISBN: (纸本)9798331507626

Electrical Impedance Tomography (EIT) is increasingly being used to recognize hand signs due to its internal sensing capabilities. EIT systems operate by injecting a lowamplitude electrical current into the forearm through a set of electrodes and recording the resulting voltages for signal processing. However, this method can result in high power consumption in wearable hand gesture recognition applications due to the current injection-based principle. To overcome this limitation, our investigation focuses on reducing the power consumption of EIT systems by minimizing the number of injected currents. In this study, we propose an injection reduction approach based on ambiguity analysis and the reduction of non-relevant voltage readings. As a result, the proposed method eliminates 3 out of 8 current injections, leading to a 37.5 % reduction in power consumption. This decreases energy usage by 22.5 mW per measurement for a current amplitude of 150 μ A over 10 trials. Further, acquisition time was reduced from 1 second to 0.6 seconds. The classification accuracy using the KNN classifier reached 99 % with full measurements and 96 % with reduced injections. Moreover, a comparative analysis of the reduced injections to forearm anatomy is performed. It demonstrates that bones and high-density muscle areas can affect the current flow and result in inaccurate measurements. These findings demonstrate the potential for reducing current injections in EIT to produce more energy-efficient wearable hand sign recognition systems. © 2024 IEEE.

关键词： Nearest neighbor search

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Assessing the Electrical Properties of DPLF/CNT/PDMS Biocomposite Using Impedance measurements

Assessing the Electrical Properties of DPLF/CNT/PDMS Biocomp...

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

作者： Jawhar Aloulou Ayda Bouhamed Chedly Bradai Olfa Kanoun Laboratory of Electromechanical Systems (LASEM) National Engineering School of Sfax University of Sfax Sfax Tunisia Chair for Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany

ISBN: (数字)9798350374131

ISBN: (纸本)9798350374148

In this contribution, a new biocomposite based on natural Palm fibres is explored. Multiwalled carbon nanotubes (MWCNT), Polydimethylsiloxane (PDMS) and Doom palm leaf fibres (DPLF) composite is investigated using simple and cost-effective solution mixing method. This study was done to validate the potential of this novel material for pressure sensing. Thin composite layers containing different concentrations of DPLF and MWCNTs have been realized using stencil printing method. Using MWCNT as a first filler in PDMS polymer, contributes to a piezoresistive properties. In order to investigate the impact of DPLF addition on the electrical properties of the composites, electrical measurements were conducted using impedance spectroscopy and linear sweep voltammetry. The results have shown that the addition of DPLF has a huge impact on the electrical behaviour of the composite, significant base resistance increase, potential change in the percolation threshold and increase in sensitivity.

关键词： Printing Spectroscopy Electric potential Impedance measurement Sensitivity Carbon nanotubes sensors

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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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3D Geometry Design of the Human Thorax and Forward Calculation for Electrical Impedance Tomography 20

3D Geometry Design of the Human Thorax and Forward Calculati...

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20th International Multi-Conference on Systems, Signals and Devices, SSD 2023

作者： Alwaz, Youssef Bader, Oumaima Ben Amara, Najoua Essoukri Kanoun, Olfa University of Sousse National Engineering School of Sousse Sousse Tunisia Université de Sousse Ecole Nationale d'Ingénieurs de Sousse LATIS- Laboratory of Advanced Technology and Intelligent Systems Sousse4023 Tunisia Technische Universität Chemnitz Measurement and Sensor Technology Chemnitz09111 Germany

ISBN: (纸本)9798350332568

Electrical Impedance Tomography (EIT) for lung monitoring reflects the internal conductivity distribution of human tissues based on the boundary voltages that are measured through given electrodes. The electrodes are placed around the human chest. A low-amplitude current is injected through driving electrodes, and the boundary voltages are measured through other electrodes. In this context, this work has elaborated a strategy for the design of a 3D geometry of the human thorax based on sequential Computed Tomography (CT) scans. This geometry will be used for the simulation and analysis of the EIT measurement. Image segmentation has been used to extract the contour within different layers of the CT scans to form the final 3D geometry of the chest containing the lungs and the thorax. The generated geometry was later meshed and repaired. Mesh properties were controlled through the Skewness quality metric. A multi-layered design has been elaborated to mimic different human chest layers such as body fluid, muscle, and skin resulting in three models. These models had given the accuracy of 62%, 63%, and 65% of skewed elements relative to the existing volume. Later on, the electrodes were placed on the thorax geometry for EIT forward simulation, and the effect of the multi-layered model has been investigated. © 2023 IEEE.

关键词： Finite element method

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Simulation of High Temperature Thin Film Thermocouple on Engine Blade Surface

Simulation of High Temperature Thin Film Thermocouple on Eng...

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2022 International Conference on Mechatronics and Automation technology, ICMAT 2022

作者： Zhang, Meiju Tian, Bian Ma, Rong Huang, Manguo Liang, Xiaobo Liu, Jiangjiang Zhang, Zhongkai Beijing Changcheng Aeronautic Measurement and Control Technology Research Institute Beijing101111 China Aviation Key Laboratory of Science and Technology on Special Condition Monitoring Sensor Technology Beijing101111 China State Key Laboratory for Mechanical Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an710049 China

ISBN: (纸本)9781643683669

In order to avoid the instability flutter of aero-engine blade and prevent the failure of thin film thermocouple caused by the blade in complex environment, the structural strength of the thermocouple on the actual blade surface was studied in this paper. Firstly, based on the 3D scanning of the real blade, the blade model is established after the point cloud graphics. The surface thermocouple model of the blade is established in Solidworks for simulation, and the modal and harmonic response analysis of the blade is simulated. Secondly, the vibration of the curved thin film thermocouple and the stress distribution of the blade under the acceleration shock were studied in Comsol, and the failure weakness was analyzed to avoid the failure of the thin film thermocouple caused by the bending, fracture or shedding of the thin film thermocouple on the blade due to vibration and shock, providing the most suitable thermocouple selection for the engine blade. © 2022 The authors and IOS Press.

关键词： Thermocouples

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Effect of Chloride Ion Concentrations on Luminescence Peak Blue Shift of Light-Emitting Diode Using Anti-Solvent Extraction of Quasi-Two-Dimensional Perovskite

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Tsinghua Science and technology 2021年第4期26卷 496-504页

作者： Baoyu Liu Xiaoping Zou Dan Chen Taoran Liu Yuhua Zuo Jun Zheng Zhi Liu Buwen Cheng 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 the State 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

In recent years,Perovskite Light-Emitting Diodes(PeLEDs)have received considerable attention in ***,with the development of PeLEDs,commercial applications of full-color PeLED technology are largely limited by the progress of blue-emitting devices,due to the uncontrollably accurate composition,unstable properties,and low *** this article,we add Cesium chloride(CsCl)to the quasi-two-dimensional(quasi-2D)perovskite precursor solution and achieve the relatively blue shifts of PeLED emission peak by introducing chloride ions for photoluminescence(PL)and electroluminescence(EL).We also found that the introduction of chlorine ions can make quasi-2D perovskite films thinner with smoother surface of 0.408 *** is interesting that the EL peaks and intensities of PeLED are adjustable under different driving voltages in high concentration chlorine-added perovskite devices,and different processes of photo-excited,photo-quenched,and photo-excited occur sequentially with the increasing driving *** work provides a path for demonstrating full-color screens in the future.

关键词： Perovskite Light-Emitting Diodes(PeLEDs) quasi-two-dimensional(quasi-2D) chloride ions blue shifts

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Advances in wearable and implantable devices for wireless electrical stimulation therapy

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Discover Electronics 2025年第1期2卷 1-18页

作者： Zhang, Yue Wang, Yijing Zhao, Kun Yang, Minye Ye, Zhilu Zhang, Xiaohui State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education Engineering Research Center of Spin Quantum Sensor Chips Universities of Shaanxi Province School of Electronic Science and Engineering Xi’an Jiaotong University Xi’an China State Key Laboratory for Manufacturing Systems Engineering The Key Laboratory of Biomedical Information Engineering of Ministry of Education Center for Mitochondrial Biology and Medicine School of Life Science and Technology International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology Xi’an Key Laboratory for Biomedical Testing and High-End Equipment Xi’an Jiaotong University Xi’an China

Wireless electrical stimulation devices have gained considerable attention due to their potential to offer therapeutic benefits in various medical applications, including pain management, neurological rehabilitation, and tissue regeneration. Traditionally, electrical stimulation is delivered through large, hospital-based equipment, limiting patient accessibility and convenience. Recent advancements in wearable and implantable devices, however, have paved the way for in-home electrical stimulation therapies. These devices, designed to be wireless and battery-free, offer greater flexibility, but their development hinges on effective methods of wireless power transfer. This review explores key approaches for wirelessly powering these devices, such as inductive coupling, mechanical energy harvesting, magnetic field induction, and optical power transfer. Each method presents unique advantages and limitations in terms of efficiency, range, and practicality for wearable or implantable use. Additionally, we discuss emerging materials that enhance device performance, including bioabsorbable materials that degrade naturally after use, stretchable materials that improve stretchability, and self-adhesive materials that enhance secure attachment. This review provides a comprehensive overview of the key strategies and materials that are driving the development of more effective and accessible electrical stimulation technologies. These advancements hold great promise for improving patient outcomes and expanding the use of electrical stimulation in both clinical and at-home therapies.

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