检索结果-内蒙古大学图书馆

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

来源：评论

学校读者我要写书评

暂无评论

Fundamental Investigations in the Design of Five-Axis Nanopositioning Machines for measurement and Fabrication Purposes

引用

Nanomanufacturing and Metrology 2021年第3期4卷 156-164页

作者： Ralf Schienbein Florian Fern Rene Theska Shraddha Supreeti Roland FuBl Eberhard Manske Department of Mechanical Engineering Institute of Design and Precision Engineering.Technical University of Ilmenau.IlmenauGermany Institute of Process Measurement and Sensor Technology Department of Mechanical EngineeringTechnical University of IlmenauIlmenauGermany Electronics Technology Group Department of Electrical Engineering and Information TechnologyTechnical University of IlmenauIlmenauGermany

The majority of nanopositioning and nanomeasuring machines(NPMMs)are based on three independent linear movements in a Cartesian coordinate *** in combination with the specific nature of sensors and tools limits the addressable part *** enhancement of an NPMM is introduced by the implementation of rotational movements while keeping the precision in the nanometer *** this purpose,a parameter-based dynamic evaluation system with quantifiable technological parameters has been set up and employed to identify and assess general solution concepts and adequate *** taken show high potential for three linear movements of the object in combination with two angular movements of the *** influence of the additional rotation systems on the existing structure of NPMMs has been investigated further *** series on the repeatability of an NPMM enhanced by a chosen combination of a rotary stage and a goniometer setup are *** a result of these test series,the necessity of in situ position determination of the tool became very *** tool position is measured in situ in relation to a hemispherical reference mirror by three Fabry-Perot *** optimization has been used to enhance the overall system structure with regard to reproducibility and long-term *** have been experimentally investigated by use of a retroreflector as a tool and the various laser interferometers of the *** knowledge gained has been formed into general rules for the verification and optimization of design solutions for multiaxial nanopositioning machines.

关键词： Multiaxial nanopositioning and nanomanufacturing Ultra-precision machine designs 5-Axis operation Ultraprecision rotations

来源：评论

学校读者我要写书评

暂无评论

Soft Nanocomposite-Based Pressure sensors as Smart Seals

Soft Nanocomposite-Based Pressure Sensors as Smart Seals

引用

Impedance Spectroscopy (IWIS), International Workshop on

作者： José Roberto Bautista-Quijano Olfa Kanoun Chair of Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany

Mechanical seals play a critical role in the functionality of diverse joint mechanical elements and solid structures. Their main functions are the prevention of mass transfer, maintaining stable pressure between the joints, as well as avoiding external contamination. Yet, current sealing technology is unable to provide a sealing solution in which the pressure applied between the mechanical elements is monitored to ensure sealing functionality. In this work, the use of square-shaped nanocomposite sensors made of polydimethyl-siloxane (PDMS)/carbon nanotubes (CNT) encapsulated in neat PDSMS is investigated and its performance against high pressure is evaluated. The sensing behavior was found to be significantly different depending on the pressure level (below or above 1.5 MPa), while adjusting the CNT content improves the sensitivity at higher loads. This kind of smart seals based on nanocomposite pressure sensors can be applied in different fields of industry, such as manufacturing, automotive, aerospace and even energy as smart seal for monitoring in-between plates' pressure in hydrogen fuel cells.

关键词： Pressure sensors Industries Vibrations Hydrogen Fuel cells Seals Manufacturing

来源：评论

学校读者我要写书评

暂无评论

State of Charge-Dependent Changes in Spectral Composition of Guided Lamb Waves in Lithium-Ion Batteries

State of Charge-Dependent Changes in Spectral Composition of...

引用

IEEE Symposium (IUS) Ultrasonics

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

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.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Upcycling Emperor Fish Scales for Biocompatible Piezoelectric Energy Harvesting

Upcycling Emperor Fish Scales for Biocompatible Piezoelectri...

引用

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

作者： Rajarajan Ramalingame Sanjeev Vishal Kota Olfa Kanoun Chair of Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany

Tons of fish waste is discarded from many foods processing industries which are indeed a good source of collagen which exhibits piezoelectric properties. Collagen is found in the scales, skin, fin, bladder bones of the fishes. Among these, the scales contain the maximum proportion of glycine composition. This article reports a systematic procedure based on chemical treatments to extract collagen from fish scales and incorporate in polydimethylsiloxane polymer, which is also biocompatible to develop the flexible, biocompatible piezoelectric harvester. The unpoled energy harvester can deliver an output voltage of 5 V, the short circuit current of 30 mA, and a corresponding maximum output power density of 649 mW/cm2 with a load resistance of 100 Ω under compressive stress applied at a frequency of 30 Hz. Such biocompatible energy harvesters are highly suited for human body-attached solutions that could harvest energy from gait and the hand-arm movement.

关键词： Vibrations Proteins Compressive stress Systematics Short-circuit currents Fish Skin

来源：评论

学校读者我要写书评

暂无评论

Heterodyne Standing-Wave Interferometer with Improved Phase Stability

引用

Nanomanufacturing and Metrology 2021年第3期4卷 190-199页

作者： Ingo Ortlepp Jens-Peter Zollner Ivo W.Rangelow Eberhard Manske Institute of Process Measurement and Sensor Technology Technische Universitat IlmenauEhrenbergstraBe 2998693 IlmenauGermany Microelectronic and Nanoelectronic Systems Group Technische Universitat IlmenauIlmenauGermany Nanoscale Systems Group Technische Universitat IlmenauIlmenauGermany

This paper describes a standing-wave interferometer with two laser sources of different wavelengths,diametrically opposed and emitting towards each *** resulting standing wave has an intensity profile which is moving with a constant velocity,and is directly detected inside the laser beam by two thin and transparent photo *** first sensor is at a fixed position,serving as a phase reference for the second one which is moved along the optical axis,resulting in a frequency shift,proportional to the *** phase difference between both sensors is evaluated for the purpose of interferometric length measurements.

关键词： Standing wave Interferometer Heterodyne Ultrathin photo diode

来源：评论

学校读者我要写书评

暂无评论

Automated Charging of Battery Electric Vehicles on Trains to Accelerate the Mobility Revolution

Automated Charging of Battery Electric Vehicles on Trains to...

引用

IEEE Green Energy and Systems Conference (IGESC)

作者： Armin Buchroithner Christof Birgel Timon Bertignoll Tobias Mitter Simon Wellenzohn Alexander Schimanofsky Peter Brunnhofer Sebastian Demuth 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: (数字)9798350379617

ISBN: (纸本)9798350379624

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 CO 2 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.

关键词： Rails Green energy Electric vehicles Smart systems Low carbon economy Power electronics Batteries Power systems Carbon emissions

来源：评论

学校读者我要写书评

暂无评论

Biomimetic Robotic Hand with Highly Sensitive Integrated Nanocomposite Force sensors for Adaptive Grasping

Biomimetic Robotic Hand with Highly Sensitive Integrated Nan...

引用

International Workshop on Robot Sensing (ROSE)

作者： Ahmed Attaoui Achraf Djemal Bilel Ben Atitallah Asma El Jaoui Olfa Kanoun Professorship Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Laboratory of Mechanics of Sousse National Engineering School of Sousse University of Sousse Sousse Tunisia Laboratory of Signals Systems Artificial Intelligence and Networks National School of Electronics and Telecommunications of Sfax Sfax Tunisia

ISBN: (数字)9798350362367

ISBN: (纸本)9798350362374

Robotic hands have immense potential for a wide range of applications, but the key challenge is still to achieve human-like dexterity. This requires overcoming several challenges, such as high system complexity, slow response time, and difficulties in integrating effective sensors. In this study, we present a novel robotic hand with 17 degrees-of-freedom equipped with nanocomposite based pressure and strain sensors. Inspired by the human hand's capabilities, the hand's design strives to mimic its dexterity and shape. The implemented nanocomposite sensors have exceptional electrical, mechanical, and electrochemical capabilities, making them ideal for integration into our robotic hand system design. The pressure sensor has a rapid response time, high pressure sensitivity of 4.4 kΩ /kPa, and remains stable over more than 5,000 cycles, demonstrating a high reliability. The strain sensor also maintains good linearity of 0.98 when subjected to strains from 0% to 24.49%. To address the challenge of balancing secure grasping and delicate touch, a finite state machine (FSM) control method is proposed enabling the hand to dynamically adjust its grasping pressure based on the real-time sensor feedback, allowing for precise manipulation of fragile objects. Experiments demonstrate the effectiveness of the proposed approach, paving the way for the development of intelligent robotic systems with enhanced dexterity and adaptability for real-world applications.

关键词： Automata Tactile sensors Grasping Robot sensing systems Capacitive sensors sensor systems sensors

来源：评论

学校读者我要写书评

暂无评论

Features Selection for Force Myography Based Hand Gesture Recognition

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

引用

IEEE Jordan International Joint Conference on Electrical Engineering and Information technology (JEEIT)

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

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.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Acoustical Sensitivity and Linearity of an Air-Coupled 3D-Printed Ferroelectret Ultrasonic Receiver

Acoustical Sensitivity and Linearity of an Air-Coupled 3D-Pr...

引用

IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Sven Suppelt Alexander A. Altmann Stephan Schaumann Nils Demuth Marc Müller Luise E. Jazdzewski Tomás E. Gómez Álvarez-Arenas Christian Bretthauer Achim Bittner Mario Kupnik Measurement and Sensor Technology Group Technical University of Darmstadt Germany Hahn-Schickard-Gesellschaft Villingen-Schwenningen Germany Ultrasonic and Sensors Technologies Department Spanish National Research Council Madrid Spain Infineon Technologies AG Germany

ISBN: (数字)9798350371901

ISBN: (纸本)9798350371918

3D-printed ferroelectret transducers, utilizing poly-lactic acid (PLA), present an eco-friendly alternative to ceramic-based transducers, which predominantly employ lead zirconate titanate (PZT). We demonstrate using 3D-printed ferroelectret ultrasonic transducers made from PLA featuring well-defined cavities as a sound receiver by developing a simple amplifier circuit and measure the resulting linearity and sensitivity. The quasi-permanently trapped surface charges inside the air cavities of the ferroelectret ultrasonic transducer serve as an electrical bias, resulting in a mechanical pre-stress due to the electrostatic force. The amplifier for the microphone does not need to provide a DC-Bias and is based on a charge amplifier with a flat amplification curve between 20 kHz and 80 kHz. We test the receiver in an anechoic chamber at a distance of 30 cm. We excite with a broadband electrostatic transducer over different frequencies and sound pressures. The receiver exhibits a linear relationship between output voltage and sound pressure, with a mean square error of 102.14 mV 2 at 50 kHz. The sensitivity varies with frequency, peaking at 29 kHz with -25 dB/VPa and has a 6 dB-bandwidth of 32 kHz. These results underscore the potential of easily manufacturable and adaptable ferroelectret transducers as viable, eco-friendly alternatives to traditional piezoelectric devices.

关键词： Ultrasonic transducers Transducers Sensitivity Ultrasonic variables measurement Linearity Receivers Acoustics Piezoelectric devices Electrostatics Lead zirconate titanate

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：