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Correction to: Quantitative measurement of density fluctuations with a full‑field laser interferometric vibrometer

Experiments in Fluids 2020年第4期61卷 1-1页

作者： Greiffenhagen, Felix Woisetschläger, Jakob Gürtler, Johannes Czarske, Jürgen Institute for Thermal Turbomachinery and Machine Dynamics Graz University of Technology Graz Austria Laboratory of Measurement and Sensor System Technique Faculty of Electrical and Computer Engineering Technische Universität Dresden Dresden Germany

The original published article contains error in equation and reference.

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Acoustic Energy Harvesting with Irradiated Cross-linked Polypropylene Piezoelectret Films

Acoustic Energy Harvesting with Irradiated Cross-linked Poly...

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第二届振动与能量收集应用国际学术会议

作者： Yuan Xue Jinfeng Zhao Xiaoqing Zhang Gerhard M.Sessler Mario Kupnik Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Phys School of Aerospace Engineering and Applied Mechanics Tongji University100 Zhangwu Road200092 Shan Institute for Telecommunications Technology Technische Universit?t DarmstadtMerckstrasse 2564283 D Measurement and Sensor Technology Group Technische Universit?t DarmstadtMerckstrasse 2564283 Darms

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Investigation of the propagation of measurement uncertainty in two-step method 18

Investigation of the propagation of measurement uncertainty ...

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18th International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2018

作者： Shi, Shengyu Kuschmierz, Robert Czarske, Jürgen Qu, Jinping Zhang, Hao Lin, Jing Key Laboratory of Polymer Processing Engineering of Ministry of Education National Engineering Research Center of Novel Equipment for Polymer Processing School of Mechanical and Automobile Engineering South China University of Technology Guangzhou510640 China Laboratory for Measurement and Sensor System Techniques Technische Universitat Dresden Dresden01069 Germany State Key Laboratory for Manufacturing System Engineering School of Mechanical Engineering Xi'an Jiaotong University Xi'an710049 China School of Reliability and Systems Engineering Beihang University Xueyuan Road No. 37 Haidian District Beijing China

ISBN: (纸本)9780995775121

The multi-step method is one of the most classical error separation techniques capable of recovering the spindle error and the roundness error from the composite probe signals. However, its accuracy decreases due to the harmonic suppression problem (HSP). Increasing the number of measurements can reduce the suppressed harmonics, but leads to lengthy measurement procedure. For simplifying the measurement procedure, the two-step method (TSM) was proposed by utilizing the harmonic calculation. Unfortunately, TSM is also subject to HSP. Hence, the focus of this paper is to reveal the mechanism of HSP in TSM, from the perspective of propagation of measurement uncertainty. To achieve this aim, first, a Laplace Transform based algorithm for TSM is proposed. Then, the system model is developed in accordance to the algorithm, and subsequently, the propagation of measurement uncertainty in TSM is theoretically analysed. Ultimately, Monte Carlo simulations are carried out for verification. © 2018 CURRAN-CONFERENCE. All rights reserved.

关键词： Laplace transforms

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Design of temperature compensation for silicon-sapphire pressure sensor

Design of temperature compensation for silicon-sapphire pres...

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2017 IEEE International Conference on Imaging Systems and Techniques, IST 2017

作者： Manguo, Huang Defeng, Liu Chao, Lu Zhanshe, Guo Xin, Li Advanced Sensor Technology Center AVIC Beijing Changcheng Aeronautic Measurement Control Technology Research Institute Aviation Key Laboratory of Science and Technology Special Condition Monitoring Sensor Technology Beijing China School of Instrument Science and Opto-electronics Engineering State Key Laboratory of Virtual Reality Technology and Systems Beihang University Beijing China

ISBN: (纸本)9781538616208

In order to solve the problem that the temperature drift of the silicon-on-sapphire pressure sensor is too large to reduce the accuracy of pressure measurement at high temperature, a temperature compensation scheme based on a single chip is proposed. The temperature of the working environment is obtained by a PT100, and integrated with the output of pressure sensor to calculate the compensated pressure sensor. Problems of power supply and signal acquisition are solved by the high precision, low drift voltage and current references, programmable amplifiers and high precision ADCs on chip. According to the working characteristics of the silicon-on-sapphire pressure sensor, an efficient temperature compensation algorithm is designed, and written to the on-chip ARM processor. The experimental results show that the maximum measurement error of pressure in the temperature range of -20∼250°C and measurement range of 0∼28 MPa is 8.37%FS before compensation and reduced to 0.3%FS after compensation. The accuracy of the sensor is greatly improved by the compensation system. © 2017 IEEE.

关键词： Pressure sensors

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Development of a smart acceleration measurement unit for industry 4.0 15

Development of a smart acceleration measurement unit for ind...

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15th International Multi-Conference on Systems, Signals and Devices, SSD 2018

作者： Trigona, Carlo Bradai, Sonia Naifar, Slim Rosa, Roberto La Baglio, Salvatore Kanoun, Olfa Dipartimento di Ingegneria Elettrica Elettronica e Informatica D.I.E.E.I University of Catania Viale Andrea Doria 6 Catania95125 Italy Technische Universität Chemnitz Department for Measurement and Sensor Technology Reichenhainer Straβe 70 Chemnitz09126 Germany Laboratory of Electromechanical Systems National Engineering School of Sfax University of Sfax Route de Soukra km 4 Sfax3038 Tunisia STMicroelectronics Stradale Primo Sole 50 Catania95121 Italy

ISBN: (纸本)9781538653050

One of the main issues taken into account concerns the reduction of power consumption. In particular, also the 'standby' condition must be accounted and it represents a significant amount of the total power dissipation. Systems using a wake-up strategy transmit the data only when the measurand exceeds a specific threshold level. This operation strategy also named 'Zero-Current Standby' has been pursued in this paper. In particular, we present a smart acceleration measurement unit, based on a piezoelectric transducer which is capable to monitor sinusoidal vibrations (50 Hz) coming from vibrating devices, such as electrical machine, industrial equipment, instrumentations, etc.). The proposed smart acceleration measurement unit provides the power required by the electronic conditioning circuit and the Bluetooth transmitter only when the level of acceleration overcomes a fixed threshold. This threshold can be adjusted to corresponding values to a malfunction of the vibrating device. The activity of the device can be monitored within an IoT approach using a specially developed APP. laboratory characterization and experimental results are also presented. They show a linear characteristic, which makes the proposed system suitable for many applications. © 2018 IEEE.

关键词： Industry 4.0

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A doubly-curved piezoelectric composite with 1–3 connectivity for underwater transducer applications

A doubly-curved piezoelectric composite with 1–3 connectivi...

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The 4th International Conference on Advanced engineering and technology(ICAET 2017)

作者： Yanjun Zhang Likun Wang Lei Qin Qingwei Liao Chao Zhong Beijing Key Laboratory for Sensor Beijing Information Science & Technology University Beijing Key Laboratory for Optoelectronic Measurement Technology Beijing Information Science& Technology University Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science and Technology University School of Electronic Engineering Beijing University of Posts and Telecommunications

Aim to increase the horizontal and vertical beam width of the high frequency transducer simultaneously, we present a doubly-curved 1-3 piezoelectric composite *** consists of 54%piezoelectric ceramic volume fraction and two phases polymer *** finite element analysis(FEA) is used to evaluate the dynamic response of *** response in water was measured for the doubly-curved composite being considered as underwater *** underwater transducer was fabricated using the doubly-curved 1-3 piezoelectric composite ***-3 dB full angle beam width of transducer is approximately 106° and 36° in the horizontal and vertical plane *** the FEA simulations and experimental results show the potential of a broad covered area of the composite transducer in underwater environment.

关键词： A doubly-curved piezoelectric composite with 1 connectivity for underwater transducer applications

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Breaking the energy-symmetry blockade in magneto-optical rotation

arXiv

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arXiv 2018年

作者： Zhu, Chengjie Zhou, Feng Zhu, Eric Y. Hagley, E.W. Deng, L. MOE Key Laboratory of Advanced Micro-Structured Materials School of Physics Science and Engineering Tongji University Shanghai200092 China Engineering Physics Division National Institute of Standards & Technology GaithersburgMD20899 United States uhan Institute of Physics & Mathematics Chinese Academy of Sciences Wuhan430071 China School of Optical and Electronic Information Huazhong University of Science & Technology Wuhan430074 China Quantum Measurement Division National Institute of Standards & Technology GaithersburgMD20899 United States Department of Electrical and Computer Engineering University of Toronto TorontoONM5S 3G4 Canada Sensor Science Division National Institute of Standards & Technology GaithersburgMD20899 United States

The magneto-optical polarization rotation effect has prolific applications in various research areas spanning the scientific spectrum including space and interstellar research, nano-technology and material science, biomedical imaging, and sub-atomic particle research. In nonlinear magneto- optical rotation (NMOR), the intensity of a linearly-polarized probe field affects the rotation of its own polarization plane while propagating in a magnetized medium. However, typical NMOR signals of conventional single-beam Λ-scheme atomic magnetometers are peculiarly small, requiring sophisticated magnetic shielding under complex operational conditions. Here, we show the presence of an energy-symmetry blockade that undermines the NMOR effect in conventional single-beam Λ-scheme atomic magnetometers. We further demonstrate, both experimentally and theoretically, an inelastic wave-mixing technique that breaks this NMOR blockade, resulting in more than five orders of magnitude (>300,000-fold) NMOR optical signal power spectral density enhancement never before seen with conventional single-beam Λ-scheme atomic magnetometers. This new technique, demonstrated with substantially reduced light intensities, may lead to many applications, especially in the field of bio-magnetism and high-resolution low-field magnetic imaging. Copyright © 2018, The Authors. All rights reserved.

关键词： Medical imaging

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A Doubly-Curved Piezoelectric Composite with 1–3 Connectivity for Underwater Transducer Applications

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IOP Conference Series: Materials Science and engineering 2018年第1期317卷

作者： Yanjun Zhang Likun Wang Lei Qin Qingwei Liao Chao Zhong Beijing Key Laboratory for Sensor Beijing Information Science & Technology University Beijing China Beijing Key Laboratory for Optoelectronic Measurement Technology Beijing Information Science & Technology University Beijing 100192 China Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science and Technology University Beijing 100192 China School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing China

Aim to increase the horizontal and vertical beam width of the high frequency transducer simultaneously, we present a doubly-curved 1-3 piezoelectric composite element. It consists of 54% piezoelectric ceramic volume fraction and two phases polymer matrix. The finite element analysis (FEA) is used to evaluate the dynamic response of composite. Electroacoustic response in water was measured for the doubly-curved composite being considered as underwater transducer. An underwater transducer was fabricated using the doubly-curved 1-3 piezoelectric composite element. The -3 dB full angle beam width of transducer is approximately 106° and 36° in the horizontal and vertical plane respectively. Both the FEA simulations and experimental results show the potential of a broad covered area of the composite transducer in underwater environment.

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The Emerging Field of Quantum Based measurements for Pressure, Vacuum and Beyond

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Journal of Physics: Conference Series 2018年第16期1065卷

作者： J Hendricks Z Ahmed D Barker P. Egan K Douglass S Eckel J Fedchak N Klimov J Ricker J Scherschligt J. Stone National Institute of Standards and Technology Physical Measurement Laboratory Sensor Science Division Thermodynamic Metrology Group 100 Bureau Drive Gaithersburg MD 20899-8363 National Institute of Standards and Technology Physical Measurement Laboratory Engineering Physics Division Dimensional Metrology Group 100 Bureau Drive Gaithersburg MD 20899-8363

The future of pressure, vacuum and even temperature measurement will employ lasers, Fabry-Perot optical cavities, cold atom traps and lots of quantum physics. For pressure measurement of a gas, photons interact at the quantum level such that light travels at a slower speed in gas than it does in vacuum. For extreme vacuum measurements, cold atom traps will be used to detect single collisions between gas trapped cold atoms enabling the number density of the gas to be measured. For temperature measurement is performed using silicon photonics to detect the small changes in refractive index in micro machined siliconphontoic cavities coupled to optical fibers. For dynamic pressure, NIST is developing a method where the unique quantum mechanical characteristics of the molecules are themselves the standard for pressure, making it consistent with the quantum-SI. Our approach is to use independent molecular spectroscopy as a dynamic measurement of pressure, where the pressure and temperature is ascertained by measuring time-resolved pressure-broadened spectra of CO molecules. This paper briefly reviews the status of these projects currently underway at the NIST Thermodynamic Metrology Group.

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Case of study of a Profinet network using ring topology 20

Case of study of a Profinet network using ring topology

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20th IEEE International Symposium on Consumer Electronics, ISCE 2016

作者： Sestito, Guilherme Serpa Turcato, Afonso Celso Dias, Andre Luis Rocha, Murilo Silveira Brandão, Dennis Da Veiga Torres, Renato Industrial Automation Laboratory Electrical Engineering Department Engineering School of Sao Carlos University of Sao Paulo Sao Paulo Brazil Measurement and Sensor Technology Department Faculty of Electrical Engineering and Information Technology Chemnitz University of Technology Brazil

ISBN: (纸本)9781509015498

This study evaluates a large Profinet network using ring topology applied in an industry production line. The analysis is based on some performance indicators: jitter and throughput taking in consideration the update time of the devices, number of switches and cable length between IO-Devices and the IO-Controller. The network studied has a considerable amount of devices including distributed IOs, sensors and actuators. Its setup provides star and line topologies, besides a ring topology using manage switches. The results show the operation of MRP protocol and achieved values for the performance indicators in real factory automation applications. © 2016 IEEE.

关键词： Jitter

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