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New Sartorius mass comparator for highest accuracy including fully automatic vacuum transfer system

measurement: sensors 2024年 38卷

作者： Hilbrunner, Falko Schreiber, Mario Fröhlich, Thomas Fehling, Thomas Schwesinger, Folker Krapf, Gunter Sartorius Lab Instruments GmbH & Co. KG Mass Comparators Department Göttingen37079 Germany Institute of Process Measurement and Sensor Technology TU Ilmenau Ilmenau98684 Germany

Sartorius cooperated with Technische Universität Ilmenau to develop the innovative automatic mass comparator VMC1007. This facilitates highly accurate mass comparisons of weights between 100 g and 1 kg under controlled atmospheric conditions, and in a vacuum. For permanent storage of weights under vacuum conditions, the mass comparator can optionally be configured with a vacuum transfer system and corresponding containers. The device is very compact, has eight universal positions for directly handling weights of different shapes and allows for precise and fast mass comparisons. In order to make the processes for inserting and ejecting weights as simple and safe as possible, all mechanical movement axes are motorised. Mass comparisons can be controlled, monitored and analysed easily and irrespective of the operating system using web-based user interface. In all processes, the user is intuitively guided through the individual steps to enable safe, efficient and convenient work. © 2024

关键词： Comparators (optical)

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Compact Inverse-Designed Metalens for Millimeter-Wave Field Enhancement

Compact Inverse-Designed Metalens for Millimeter-Wave Field ...

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IEEE Photonics Conference (IPC)

作者： Christoph Schmidt Michael Töfferl Alexander Schossmann Peter Banzer Alexander Bergmann Institute for Measurement and Sensor Systems Graz University of Technology Graz Austria Christian Doppler Laboratory for Structured Matter Based Sensing Graz Austria Department of Physics University of Graz Graz Austria

ISBN: (数字)9798350361957

ISBN: (纸本)9798350361964

Enhancing fields is an important task in millimeter-wave applications, such as nondestructive microwave inspection, metamaterial sensing applications, or millimeter-wave imaging. This demand for compact yet high-performance devices for field enhancement operating in the millimeter-wave regime has led to innovative approaches regarding lens design. State-of-the-art lens designs in this wavelength regime tend to be bulky and operate in the far field, making them unsuitable for small form factor applications. In this context, formulating the required functionality and algorithmically looking for the desired material topology is an inversion of the standard approach. This paper presents an inverse-designed field-amplifying metalens operating in the near field of a 60GHz patch antenna. With a size of about three times the wave length, the given structure promises good performance while maintaining a smaller form factor than conventional solutions. It yields an enhancement of the power amplitude by over 7dB.

关键词： Millimeter wave technology Rapid prototyping Reproducibility of results Topology sensors Printers Polymers Microwave filters Standards Lenses

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

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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

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Thermo-Mechanical Coupled Digital Simulation of Torque sensor Based on Parallel Systems

Thermo-Mechanical Coupled Digital Simulation of Torque Senso...

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Digital Twins and Parallel Intelligence (DTPI), IEEE International Conference on

作者： Xueqin Wang Wanxin Hu Lemeng Qin Aviation Sensor Measurement and Testing Center AVIC Changcheng Institute of Metrology&Measurement Beijing China Faculty of information technology Beijing University of Technology Beijing China

ISBN: (数字)9781665492270

ISBN: (纸本)9781665492287

At present, the calibration of most torque sensors is carried out in an ideal laboratory environment. But the temperature around the torque sensor can vary widely in practical applications. The thermal radiation from ambient temperature usually causes the elastic element of the sensor to deviate from Hooke's law and resulting in errors. Based on this problem, we establish the digital simulation and an artificial system of a certain type of strain torque sensor by thermo-mechanical coupled digital simulation method, and we calculate the time-temperature distribution models and the time-elastic modulus distribution model of sensors under different working conditions by finite element thermal analysis and transient force analysis method. Finally, we summarize some change rule of the torque sensor parameters like elastic modulus or shear stress with temperature. So as to obtain the influence mechanism of temperature on the torque sensor, which provides a basis for the improvement of calibration method.

关键词： Temperature sensors Temperature measurement Torque Thermomechanical processes sensor systems Capacitive sensors sensors

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First prototype of a positioning device with subatomic resolution 22

First prototype of a positioning device with subatomic resol...

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

作者： Hebenstreit, Roman Wedrich, Karin Strehle, Steffen Manske, Eberhard Theska, René Technische Universität Ilmenau Department of Mechanical Engineering Institute for Design and Precision Engineering Precision Engineering Group Germany Technische Universität Ilmenau Department of Mechanical Engineering Institute of Micro- and Nanotechnologies Microsystems Technology Group Germany Technische Universität Ilmenau Department of Mechanical Engineering Institute of Process Measurement and Sensor Technology Germany

ISBN: (纸本)9781998999118

In the forthgoing work on a device that enables subatomic resolved highly reproducible positioning, a first prototype is here presented. The entire positioning system including the actuator, sensor and guiding mechanism, is realized as a micro-electro-mechanical system (MEMS) on chip level, based on silicon-on-insulator (SOI) technology. A modular printed circuit board acts as the mechanical as well as the electrical contacting interface for the silicon chip. First variants of a linear positioning system comprising axisymmetric double parallel crank structure are investigated. Pivot joints as flexure hinges with concentrated compliance are deployed. These hinges show minimal rotational axis displacement for small angles of deflection, thus ensuring smallest deviations to a straight-line path of the linear guiding mechanism. An electrostatic comb actuator transmits forces contactless to minimize over constraints. A measuring bridge in differential mode utilizes the same comb structures to measure the table position based on the capacitance change. Estimating the position resolution, limited by the resolution of the capacitive sensor, a measurable step width below 50 pm can be expected. In further steps, the device will be a platform to be equipped with a lattice-scale-based position measurement system according to achieve an even higher resolution and reproducibility. © European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Capacitive sensors

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Medical Omics

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Deutsche Gesellschaft fur Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS) 2023年 19卷

作者： Allmer, Jens Hofestädt, Ralf Hochschule Ruhr West Institute for Measurement Engineering and Sensor Technology Mülheim an der Ruhr Germany Bielefeld University Faculty of Technology Bioinformatics/Medical Informatics Department Bielefeld Germany

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Quantitative phase imaging through an ultra-thin lensless fiber endoscope

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Light(Science & Applications) 2022年第8期11卷 1843-1852页

作者： Jiawei Sun Jiachen Wu Song Wu Ruchi Goswami Salvatore Girardo Liangcai Cao Jochen Guck Nektarios Koukourakis Juergen W.Czarske Laboratory of Measurement and Sensor System Technique(MST) TU DresdenHelmholtzstrasse 1801069DresdenGermany Competence Center for Biomedical Computational Laser Systems(BIOLAS) TU DresdenDresdenGermany State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentsTsinghua University100084BeijingChina Institute for Integrative Nanosciences IFW DresdenHelmholtzstraße 2001069DresdenGermany Max Planck Institute for the Science of Light&Max-Planck-Zentrum für Physik und Medizin 91058ErlangenGermany Cluster of Excellence Physics of Life TU DresdenDresdenGermany Institute of Applied Physics TU DresdenDresdenGermany

Quantitative phase imaging(QPI)is a label-free technique providing both morphology and quantitative biophysical information in ***,applying such a powerful technique to in vivo pathological diagnosis remains ***-core fiber bundles(MCFs)enable ultra-thin probes for in vivo imaging,but current MCF imaging techniques are limited to amplitude imaging *** demonstrate a computational lensless microendoscope that uses an ultra-thin bare MCF to perform quantitative phase imaging with microscale lateral resolution and nanoscale axial sensitivity of the optical path *** incident complex light field at the measurement side is precisely reconstructed from the far-field speckle pattern at the detection side,enabling digital refocusing in a multi-layer sample without any mechanical *** accuracy of the quantitative phase reconstruction is validated by imaging the phase target and hydrogel beads through the *** the proposed imaging modality,three-dimensional imaging of human cancer cells is achieved through the ultra-thin fiber endoscope,promising widespread clinical applications.

关键词： fiber phase thin

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Condition Monitoring for Agricultural Vehicles using Magnetoresistive sensors

Condition Monitoring for Agricultural Vehicles using Magneto...

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6th International Commercial Vehicle technology Symposium, CVT 2020

作者： Slatter, Rolf Sivasothy, Paaranan Seewig, Jörg Sensitec GmbH Lahnau35633 Germany Technische Universität Kaiserslautern Institute for Measurement and Sensor-Technology Kaiserslautern67663 Germany

ISBN: (纸本)9783658297169

Globalization, digitalization and increasing price pressure are only some of the impact factors influencing the competition in the capital goods industry. There is a trend for vehicle and machine manufacturers to differentiate by creating individual bundles, consisting of technical products and lifecycle-ori-ented services, called Product-Service Systems (PSS). There is an increasing demand for availability-oriented PSS, in which the vehicle or machine builder guarantees the availability of the technical product and takes over a part of the cus-tomer’s manufacturing risk. PSS are offered by means of different business models, depending on the product and the end market. Whichever business model is adopted, smart sensors are a key enabling technology for future availability-oriented PSS. Within the German state-funded R&D project "InnoServPro", Sensitec GmbH and the Technical University of Kaiserslautern worked with a number of partners between 2015 and 2019 to develop innovative service products for individualized, availability-oriented business models applicable to agricultural vehicles. © Der/die Autor(en), exklusiv lizenziert durch.

关键词： Magnetoresistance

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Recent advances in optical fiber high-temperature sensors and encapsulation technique[Invited]

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Chinese Optics Letters 2023年第9期21卷 47-69页

作者：徐文杰卞强梁建桥王振丞于洋孟洲 Center of Material Science National University of Defense TechnologyChangsha 410073China Photonics Laboratory Munich University of Applied SciencesMunich 80335Germany Institute for Measurement and Sensor Technology Technical University of MunichMunich 80333Germany College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China

In the aerospace field,for aerospace engines and other high-end manufacturing equipment working in extreme environments,like ultrahigh temperatures,high pressure,and high-speed airflow,in situ temperature measurement is of great importance for improving the structure design and achieving the health monitoring and the fault diagnosis of critical *** fiber sensors have the advantages of small size,easy design,corrosion resistance,anti-electromagnetic interference,and the ability to achieve distributed or quasi-distributed sensing and have broad application prospects for temperature sensing in extreme *** this review,first,we introduce the current research status of fiber Bragg grating-type and Fabry–Perot interferometer-type high-temperature *** we review the optical fiber hightemperature sensor encapsulation techniques,including tubular encapsulation,substrate encapsulation,and metalembedded encapsulation,and discuss the extreme environmental adaptability of different encapsulation ***,the critical technological issues that need to be solved for the application of optical fiber sensors in extreme environments are discussed.

关键词： optical fiber sensors high-temperature sensing encapsulation technique extreme environments

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