检索结果-内蒙古大学图书馆

Optical measurement Systems for Industrial Inspection XIII 2023

作者： Pillai, Sivaji Charrett, Thomas O.H. Kissinger, Thomas James, Stephen W. Tatam, Ralph P. Engineering Photonics Cranfield University MK43 0AL United Kingdom Institute of Process Measurement and Sensor Technology Technical University of Ilmenau PF 100565 Ilmenau98694 Germany

ISBN: (数字)9781510664463

ISBN: (纸本)9781510664456

A dual-fibre single-plane angle-sensing tape that utilizes optical Fibre Segment Interferometry and Range-Resolved Interferometry (RRI) for angle sensing is presented. The sensing tape facilitates the multiplexing of an array of angle sensors along its length and can be retrofitted into small robots and construction equipment. We demonstrate its application on three non-rotational joints of a small five-axis robot, describing the design, construction, measurement principle, and presenting measurement results. Preliminary data shows that the angles measured by the sensing tape exhibited agreement within a range of ±0.005◦ with the manufacturer-installed angle encoder of the robot. © 2023 SPIE.

关键词： Interferometry

来源：评论

学校读者我要写书评

暂无评论

Optical Fibre Based Angle measurement for Robotic Joints 28

Optical Fibre Based Angle Measurement for Robotic Joints

引用

28th International Conference on Optical Fiber sensors, OFS 2023

作者： Pillai, Sivaji Charrett, Thomas O.H. Kissinger, Thomas Barrington, James H. James, Stephen W. Tatam, Ralph P. Engineering Photonics Cranfield University MK43 0AL United Kingdom Institute of Process Measurement and Sensor Technology Technical University of Ilmenau PF 100565 Ilmenau98694 Germany

ISBN: (纸本)9781957171302

A multiplexed array of optical fibre based angle sensors for deployment on multiple joints of a robotic arm is demonstrated. Two optical fibres, each containing an array of fibre segment interferometers, are bonded either side of the neutral axis of a thin, flexible metal tape. Differential measurement of the phases of corresponding interferometers in the two fibres yields an angle measurement with resolution better than 0.001◦ over a bandwidth of 21 kHz when demodulated using the principles of range resolved interferometry. © Optica Publishing Group 2023, © 2023 The Author(s)

关键词： Optical fibers

来源：评论

学校读者我要写书评

暂无评论

Investigating the kinematic performance of a positioning device with subatomic resolution 23

Investigating the kinematic performance of a positioning dev...

引用

23rd International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2023

作者： Hebenstreit, Roman Oertel, Erik Thier, Daniel 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 Process Measurement and Sensor Technology Germany

ISBN: (纸本)9781998999132

This paper is a follow-up to the conceptual design [1] and the prototype introduction [2] of a linear positioning device with subatomic resolution. This device is designed as a monolithic system. The linear guiding is realized by a mechanism with concentrated compliances. The position measurement is performed by tip-based scanning of the surface of a scale fixed at the moving table. Considering this setup, it becomes clear that the strongest sensitivity for kinematic deviations exists for displacements collinear to the probing axis of the tip as well as corresponding tilting motions. Deviations from an ideal straight guiding axis are mainly a result of manufacturing-related geometric deviations in the guiding mechanism. These error motions are investigated and characterised for prototype devices using an optical focus sensor in combination with a nanomeasuring machine NMM-1. To distinguish dynamic influences and static contributions to error motion, a quasi-static sequence of varying positions of the system has been performed during the measurement procedure. The determined error motions are highly reproducible due to the monolithic design from monocrystalline silicon. Consequently, the systematic error contribution of manufacturing deviations to the kinematic accuracy of the positioning device can be subsequently corrected. © 2023 Euspen Headquarters.

关键词： Compliant mechanisms

来源：评论

学校读者我要写书评

暂无评论

measurement of optical fiber bending stiffness

引用

measurement: sensors 2025年

作者： Cherkasova, Valeriya Hemeling, Christoph Kissinger, Thomas Fröhlich, Thomas Institute for Process Measurement and Sensor Technology Technische Universität Ilmenau PF 10 05 65 Ilmenau98684 Germany

This paper presents traceable measurements of bending stiffness for standard optical SMF-28 fiber. Stiffness values were derived from force-displacement measurements, performed in a setup specifically designed for the stiffness calibration of MEMS and AFM cantilevers. As a test sample, fibers with free lengths of 2.8 mm, 5.0 mm, and 10.0 mm were examined. The correspondingly measured stiffness of 100.0 N/m, 14.6 N/m, and 2.4 N/m are broadly consistent with the Euler-Bernoulli beam theory. During the measurement process, deviations between load and unload cycles reaching 2 % were also observed, which can be caused by the method of fixing the optical fiber, its internal properties, stick-slip effects that occur between the sample and the load button, and internal properties of the system. This study highlights that the presented measurement approach can be used to improve the understanding of the mechanical properties of widely used optical fiber types and qualify them for use as tactile probes or for other mechanical sensing principles. © 2024

关键词： Stick-slip

来源：评论

学校读者我要写书评

暂无评论

An ultrastable metrology laser for traceable length metrology in nanopositioning machines – Towards a 10−12 uncertainty level

引用

measurement: sensors 2025年

作者： Blumröder, Ulrike Köchert, Paul Fröhlich, Thomas Ortlepp, Ingo Kissinger, Thomas Manske, Eberhard Technische Universität Ilmenau Institute of Process Measurement and Sensor Technology Ilmenau Germany Precision Engineering Division Braunschweig Germany

In this contribution we propose the incorporation of a diode laser stabilized to an ultrastable cavity (ORS) as a metrology laser within the interferometric length measurement system of a nanopositioning and -measuring machine with a lateral measurement range of 200 mm. Based on a frequency instability analysis of the ORS against a GPS-referenced frequency comb we observed a frequency drift of 6.2 kHz(Δf/f = 1.3∙10−11) during the course of one day and peak-to-peak variations below 81 kHz (Δf/f = 1.7∙10−10) over observation times up to ten days. Within daily operation of the NPMM-200, the influence of cavity-related frequency changes practically falling below the current digital resolution limit of the interferometric measurement system (2.86∙10−11) and can therefore be neglected, if a sufficient predetermination of the absolute frequency using an optical frequency comb has been applied. To guarantee an absolute tracking of the laser frequency within a non-stop service operation of the ORS at an uncertainty level of 1∙10−12, a suitable correction for the long-term frequency changes of the cavity with the help of the frequency comb has to be established. © 2024

关键词： Frequency stability

来源：评论

学校读者我要写书评

暂无评论

Direct Comparison of the Strain measurement Performance of Fibre Bragg Gratings and Fibre Segment Interferometry 28

Direct Comparison of the Strain Measurement Performance of F...

引用

28th International Conference on Optical Fiber sensors, OFS 2023

作者： Barrington, James H. Kissinger, Thomas James, Stephen W. Tatam, Ralph P. Centre for Engineering Photonics Cranfield University CranfieldMK43 0AL United Kingdom Institute of Process Measurement and Sensor Technology Technical University of Ilmenau PF 100565 Ilmenau98694 Germany

ISBN: (纸本)9781957171302

The strain sensing performance of an optical fibre Bragg grating (FBG), demodulated using a state-of-the-art commercial interrogator, is compared directly with that of a fibre segment interferometer (FSI) of near equivalent gauge length. It is shown that the FSI segment displayed a 5 fold improvement in noise, 1 nΕ/√Hz for a bandwidth of 1 kHz, compared to 5 nΕ/√Hz at 1 kHz to that of the FBG. Furthermore, by exploiting a longer gauge length, it was also demonstrated that this could further reduce noise levels. © Optica Publishing Group 2023, © 2023 The Author(s)

关键词： Fiber Bragg gratings

来源：评论

学校读者我要写书评

暂无评论

Implementation options of control systems for a cantilever calibration device 4

Implementation options of control systems for a cantilever c...

引用

4th International Conference on Control in Technical Systems, CTS 2021

作者： Cherkasova, Valeriya A. Froehlich, Thomas Institute of Process Measurement and Sensor Technology Technische Universität Ilmenau Ilmenau Germany

ISBN: (纸本)9781665424547

The article describes global approaches to control of the cantilever calibration device. The idea of the device consists in electromagnetic compensation of the influence of cantilever forces. The development of regulators is based on the simulation of mechanical processes when the cantilever is applied to the load cell with the principle of electromagnetic compensation;the identification of the processes is performed. In addition, in the course of the study, a comparison was made of PID controllers implemented on various actuator systems: an analog circuit, a current source, a dSPACE real-time system, a microcontroller. The purpose of developing and comparing regulators was to improve characteristics of the system: regulation time, overshoot, noise amplitude. © 2021 IEEE.

关键词： Calibration

来源：评论

学校读者我要写书评

暂无评论

Dynamic force generation capabilities in the PB2 Planck-Balance

Dynamic force generation capabilities in the PB2 Planck-Bala...

引用

Conference on Precision Electromagnetic measurements (CPEM)

作者： Norbert Rogge Marco-Tulio Perez-Sulbaran Suren Vasilyan Christian Rothleitner Yin Hsien Fung Georg Hein Thomas Fröhlich Institute of Process Measurement and Sensor Technology TU Ilmenau Ilmenau Germany Physikalisch-Technische Bundesanstalt (PTB) Braunschweig Germany Measurement Standards Laboratory of New Zealand Lower Hutt New Zealand

This contribution presents the generation of dynamic force in a table top Kibble balance. The inertial force of a mass standard that is moved in an oscillatory motion is determined in a dynamic force mode and serves a... 详细信息

ISBN: (数字)9798350361049

ISBN: (纸本)9798350361056

关键词： Coils Actuators Uncertainty Force measurement Electromagnetic measurements Force Dynamics

来源：评论

学校读者我要写书评

暂无评论

Ultrastable, traceable optical frequencies for length metrology in long-range nanopositioning and nanomeasuring machines 22

Ultrastable, traceable optical frequencies for length metrol...

引用

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

作者： Blumröder, Ulrike Köchert, Paul Fröhlich, Thomas Füßl, Roland Ortlepp, Ingo Gerhardt, Uwe Mastylo, Rostyslav Flügge, Jens Bosse, Harald Manske, Eberhard Technische Universität Ilmenau Institute of Process Measurement and Sensor Technology Gustav-Kirchhoff-Str. 1 Ilmenau98693 Germany Precision Engineering Division Bundesallee 100 Braunschweig38116 Germany

ISBN: (纸本)9781998999118

Precise interferometric distance measurements play a crucial role in length measuring and positioning systems that provide resolving capabilities down to the sub-nm-range. Especially for applications in nanotechnology, length metrology has to face additional challenges due to increasing measurement ranges and traverse speed. Nanopositioning and measuring machines (NPMM) meet the demands on positioning with nm-accuracy over long measurement distances. Currently, the next generation of NPMMs (NPMM-200) provide a measuring range of 200 mm × 200 mm × 25 mm with a measuring repeatability up to 20 pm. This also sets new demands on the frequency stability of the laser sources used for interferometry. In this study we present two new approaches to create traceable, ultrastable optical frequencies at 633 nm that provide frequency stability below the electronic resolution limit of the interferometers (?s = 25.10-12) thus allowing to practically eliminate the influence of frequency distortions in the NPMM-200. Both approaches utilize an optical frequency comb to ensure traceability and long-term frequency stability. The first approach permanently couples the metrology lasers of the NPMM-200 to a comb line. The second approach is based on a diode laser stabilized to an ultrastable cavity. This allows to set up a frequency reference with enhanced-short-term frequency stability and high output power. Thus, in combination with the optical frequency comb a frequency stability better than 10-12independent on integration time is prospectively accessible. © European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Frequency stability

来源：评论

学校读者我要写书评

暂无评论

Calibration of the stiffness of soft cantilevers based on electromagnetic and electrostatic force compensation principles

引用

measurement: sensors 2024年

作者： Cherkasova, Valeriya Li, Zhi Popadic, Radovan Froehlich, Thomas Brand, Uwe Institute of Process Measurement and Sensor Technology Technische Universität Ilmenau Ilmenau Germany Department 5.1 Surface Metrology Physikalisch-Technische Bundesanstalt PTB Braunschweig Germany

This article presents a modified version of a traceable force-displacement measurement device developed at TU Ilmenau. The calibration of forces is carried out by a balance with the electromagnetic and electrostatic principles of force compensation. As part of this study, the device was used to calibrate the stiffness of soft cantilevers. The expanded relative uncertainty of the measured stiffnesses in the range from 13 mN/m to 100 mN/m ranged from 1.5 % to 2.7 %. The device was also verified through two-way comparison of measurements with the PTB, good agreement was obtained. © 2024

关键词： Electrostatic force

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：