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Experimental Setup for the Investigation of Reproducibility of Novel Tool Changing Systems in Nanofabrication Machines

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Nanomanufacturing and Metrology 2021年第3期4卷 181-189页

作者： Florian Weigert Roman Hebenstreit Roland FuBl Rene Theska Institute for Design and Precision Engineering Precision Engineering GroupTechnische Universitat IlmenauGustav-Kirchhoff-Platz.298693 IlmenauGermany Institute for Process Measurement and Sensor Technology Technische Universitat IlmenauGustav-Kirchhoff-Str.198693 IlmenauGermany

Nanomeasuring machines developed at the Technische Universitat Ilmenau enable three-dimensional measurements and manufacturing processes with the lowest *** to the requirements for these processes,a highly reproducible and long-term stable tool changing system is *** this purpose,kinematically determined couplings are widely *** state-of-the-art investigations on those are not sufficient for the highest demands on the reproducibility required for this application.A theoretical determination of the reproducibility based on analytical or numerical methods is possible,however not in the desired nanometer *** to this,a measurement setup for the determination of the reproducibility in five degrees of freedom with nanometer uncertainty was ***,potential measuring devices are systematically examined and measurement principles were developed out of this.A three-dimensional vector-based uncertainty analysis is performed to prove the feasibility of the measurement principle and provides a basis for further *** a result,a transla-tory measurement uncertainty of 10 nm and a rotatory uncertainty of 11 nrad can be ***,the measurement setup is designed,focusing on the metrological frame and the lift-off *** developed setup exceeds the uncertainties of the measurement setups presented in the state-of-the-art by an order of magnitude,allowing new in-depth investigations of the reproducibility of kinematic couplings.

关键词： Tool changing Kinematic coupling measurement setup Uncertainty analysis Precision design

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Predictive modelling of cryogenic hard turning of AISI 52100 based on response surface methodology for the use in soft sensors 6th

Predictive modelling of cryogenic hard turning of AISI 52100...

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6th CIRP Conference on Surface Integrity, CSI 2022

作者： Grossmann, Felix Basten, Stephan Kirsch, Benjamin Ankener, Werner Smaga, Marek Beck, Tilmann Uebel, Julian Seewig, Jörg Aurich, Jan C. Institute For Manufacturing Technology And Production Systems Tu Kaiserslautern Gottlieb-Daimler-Str. Kaiserslautern67663 Germany Institute Of Materials Science And Engineering Tu Kaiserslautern Gottlieb-Daimler-Str. Kaiserslautern67663 Germany Institute For Measurement And Sensor Technology Tu Kaiserslautern Gottlieb-Daimler-Str. Kaiserslautern67663 Germany

This paper focuses on the development of an empirical model for the use in soft sensors to predict the surface layer properties of AISI 52100 machined via cryogenic hard turning. By using response surface methodology, a multiple regression is performed to achieve correlations between the process parameters, the process forces and the temperature, as well as the residual stresses and the austenite content. The results show a predictive R2 of over 0.75 and indicate that the empirical model can be used in soft sensors for a process control of cryogenic hard turning. © 2022 The Authors.

关键词： Cryogenics

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Pluggable multitask diffractive neural networks based on cascaded metasurfaces

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Opto-Electronic Advances 2024年第2期7卷 23-31页

作者： Cong He Dan Zhao Fei Fan Hongqiang Zhou Xin Li Yao Li Junjie Li Fei Dong Yin-Xiao Miao Yongtian Wang Lingling Huang Beijing Engineering Research Center of Mixed Reality and Advanced Display Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of ChinaSchool of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Institute of Modern Optics Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network TechnologyNankai UniversityTianjin 300350China Department of Physics and Optoelectronics Faculty of ScienceBeijing University of TechnologyBeijing 100124China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100191China Beijing Aerospace Institute for Metrology and Measurement Technology Beijing 100076China

Optical neural networks have significant advantages in terms of power consumption,parallelism,and high computing speed,which has intrigued extensive attention in both academic and engineering *** has been considered as one of the powerful tools in promoting the fields of imaging processing and object ***,the existing optical system architecture cannot be reconstructed to the realization of multi-functional artificial intelligence systems *** push the development of this issue,we propose the pluggable diffractive neural networks(P-DNN),a general paradigm resorting to the cascaded metasurfaces,which can be applied to recognize various tasks by switching internal *** the proof-of-principle,the recognition functions of six types of handwritten digits and six types of fashions are numerical simulated and experimental demonstrated at near-infrared ***,the proposed paradigm not only improves the flexibility of the optical neural networks but paves the new route for achieving high-speed,low-power and versatile artificial intelligence systems.

关键词： optical neural networks diffractive deep neural networks cascaded metasurfaces

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Depth-resolved characterization of cryogenic hard turned surface layer of AISI 52100 by X-ray diffraction and scanning electron microscopy investigations 6th

Depth-resolved characterization of cryogenic hard turned sur...

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6th CIRP Conference on Surface Integrity, CSI 2022

作者： Ankener, Werner Smaga, Marek Uebel, Julian Seewig, Jörg Grossmann, Felix Basten, Stephan Kirsch, Benjamin Aurich, Jan C. Beck, Tilmann Institute Of Materials Science And Engineering Tu Kaiserslautern Gottlieb-Daimler-Str. Kaiserslautern67663 Germany Institute For Measurement And Sensor Technology Tu Kaiserslautern Gottlieb-Daimler-Str. Kaiserslautern67663 Germany Institute For Manufacturing Technology And Production Systems Tu Kaiserslautern Gottlieb-Daimler-Str. Kaiserslautern67663 Germany

In this study, the cryogenic hard turned surface layer of AISI 52100 steel was characterized by depth-resolved investigations of the residual stresses and the austenitic phase content from the surface to a depth of 100 μm. The specimens were manufactured with machining parameters that were chosen based on an empiric model of cryogenic turning. Significant differences were quantified between the specimens regarding residual stresses and the austenitic phase content down to a depth of 20 μm. Here, Grazing Incidence XRD and FIB technique were applied to analyze the mechanically and thermally induced white layer regarding their austenitic phase content and microstructure. © 2022 The Authors.

关键词： Cryogenics

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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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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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In-Situ Calibration Method for Thermocouples in Accelerating Rate Calorimeter Based on Multiple Fixed-Points and Joule Heat

SSRN

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SSRN 2023年

作者： Liang, Weixiang Chen, Jinyu Jiang, Juncheng Schalles, Marc Marin, Sebastian Augustin, Silke Fröhlich, Thomas Ding, Jiong College of Metrology and Measurement Engineering China Jiliang University Zhejiang Hangzhou China College of Safety Science and Engineering Nanjing Tech University Nanjing China Institute for Process Measurement and Sensor Technology Technische Universität Ilmenau Ilmenau Germany

To solve the problem of temperature drift of thermocouples in accelerating rate calorimeter caused by long-term operation, an in-situ calibration method based on multiple fixed-points and Joule heat is proposed in this article. Firstly, the heat transfer model of the calorimeter is established, and the validity of the method is verified by numerical simulation. Secondly, a multiple fixed-points graphite calibrator and a cylindrical electronic resistance element are designed. Finally, the in-situ calibration is carried out. The calibration results show that the maximum permissible measurement error of the sample thermocouple after calibration is better than 0.220 °C and that the bias of consistency in-situ calibration method is smaller than 0.110 °C. In addition, a di-tert-butyl peroxide in toluene solution with a mass percent of 20% is selected as the experimental sample. The sample experiment results show that the kinetic and thermodynamic parameters are closer to the reference values after thermocouples calibration. © 2023, The Authors. All rights reserved.

关键词： Thermocouples

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On the development of five axes nanopositioning machines for measurement and fabrication purposes based on Cartesian systems 21

On the development of five axes nanopositioning machines for...

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21st International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2021

作者： Schienbein, Ralf Theska, René Fern, Florian Füßl, Roland Manske, Eberhard Precision Engineering Group Department of Mechanical Engineering Technische Universität Ilmenau Germany Institute of Process Measurement and Sensor Technology Department of Mechanical Engineering Technische Universität Ilmenau Germany

ISBN: (纸本)9780995775190

The majority of nanopositioning and nanomeasuring machines (NPMMs) are based on three independent linear movements in a Cartesian coordinate system. This in combination with the specific nature of sensors and tools limits the addressable part geometries. An enhancement of a NPMM is introduced by the implementation of rotational movements while keeping the precision untouched. For 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 substructures. Evaluations taken, show high potential for three linear movements of the object in combination with two angular movements of the tool. The influence of the additional rotation systems on the existing structure of NPMMs has been investigated further on. Test series on the repeatability of an NPMM enhanced by a chosen combination of a rotary stage and a goniometer setup are realized. As a result of these test series, the necessity of in situ position determination of the tool became very clear. The tool position is measured in situ in relation to a hemispherical reference mirror by three Fabry Pérot interferometers. FEA optimization has been used to enhance the overall system structure with regard to reproducibility and long term stability. Residual deviations to the ideal moving pathes have been experimentally investigated by replacing the tool by a retroreflector and utelization of the various laser interferometers of the NPMM. The knowledge gained has been formed into general rules for the verification and optimization of design solutions for multiaxial nanopositioning machines. © 2021 Proceedings of the 21st International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2021. All rights reserved.

关键词： Machine design

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Intra-spectral temperature-compensated FBG sensors for hydrogen detection and beyond

Intra-spectral temperature-compensated FBG sensors for hydro...

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Optica Sensing Congress 2023, AIS, FTS, HISE, sensors, ES 2023 - Part of Optical sensors and Sensing Congress 2023

作者： Buchfellner, F. Bian, Q. Moos, F. Nicolai, J. Zhang, F. Hu, W. Yang, M. Koch, A.W. Roths, J. Photonics Lab. Munich University of Applied Sciences Lothstrasse 34 Munich80335 Germany Institute for Measurement Systems and Sensor Technology Technical University Munich Munich80333 Germany Advanced Photonic Components Lab Carleton University OttawaONK1S 5B6 Canada National Engineering Research Center for Optical Fiber Sensing Technology Wuhan University of Technology Wuhan430070 China

Intra-spectral referencing of the notch to the π-FBG envelope enables direct measurement and compensation of temperature within an FBG element. This enhances reliability and enables versatile real-field applications ... 详细信息

ISBN: (纸本)9781957171241

关键词： Fiber Bragg gratings

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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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