scholarly journals Establishment of torque realisation up to 5 kN·m with a new design of the torque standard machine

ACTA IMEKO ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 30
Author(s):  
Nittaya Arksonnarong ◽  
Nattapon Saenkhum ◽  
Pramann Chantaraksa ◽  
Tassanai Sanponpute
Keyword(s):  
Measurement Range ◽  
Uncertainty Evaluation ◽  
Torque Measurement ◽  
Calibration And Measurement Capabilities ◽  
Measurement Results ◽  
Bearing Structure ◽  
Measurement Capabilities

<p class="Abstract">A Torque Standard Machine (TSM) with a rated capacity of 5 kN·m was designed and constructed by the Torque Laboratory, National Institute of Metrology (Thailand), NIMT. The machine had initially used a flexure bearing as a fulcrum. It had been developed based on the research of a 10 N·m suspended fulcrum TSM. However, the bearing structure was changed to a combination of eight elastic hinges in order to withstand larger cross-forces for providing greater strength and providing a shorter stabilising time, consuming the lever arm’s swing. With a three-column weightlifting system, the machine provides five measuring ranges ranging from 100 N·m to 5,000 N·m in the same set of stacked weights.</p><p class="Abstract">The measurement results showed the sensitivity of the fulcrum within ± 0.005 N·m from 10 % to 100 % of the measurement range. The sensitivity of the fulcrum is one of the main sources of the uncertainty evaluation of the torque measurement. The Calibration and Measurement Capabilities (CMCs) of the torque measurement were 0.01 % (<em>k=2</em>) in the measurement range from 500 N·m to 5,000 N·m. To confirm the capability of the measurement, an informal comparison with Physikalisch-Technische Bundesanstalt (PTB) was conducted. The results were satisfactory, with the |<em>E</em><sub>n</sub>| less than 1.</p>

National standards of the impulse electrical voltage of Russian Federation and Republic of Belarus: additional comparisons

2021 ◽  
pp. 38-40
Author(s):  
Oleg V. Kaminsky ◽  
Andrey V. Kleopin ◽  
Vladislav V. Makarov ◽  
Leonid N. Selin
Keyword(s):  
Pulse Generator ◽  
Primary Standard ◽  
Critical Value ◽  
National Standards ◽  
Laboratory Measurements ◽  
Bilateral Comparison ◽  
Calibration And Measurement Capabilities ◽  
Electrical Voltage ◽  
Measurement Results ◽  
Measurement Capabilities

The results of additional bilateral comparison of initial standards of the impulse electrical voltage unit were considered. As a result of comparison there were confirmed announced uncertainties and calibration and measurement capabilities of the participants of comparison. The comparison was carried out under guidance of COOMET (project 710/RU-a/16) оn the initiative of national metrology institutes (NMI): VNIIFTRI (Russia) and BelGIM (Republic of Belarus). The comparison involved national standards: the State primary standard unit of the impulse electrical voltage unit (GET 182-2010, VNIIFTRI) and the original standard of the impulse electrical voltage unit BelGIM. Step pulse generator TMG030010SN11-M1 was used as a traveling standard. The values of the impulse electrical voltage, reproduced by means of traveling standard, were measured by national standards.The purpose of comparison was to confirm confidence in the measurement results and calibration certificates, issued by the NMI in the field of impulse electrical voltage measurements. In the comparison VNIIFTRI acted as a pilot laboratory. Measurements of impulse electrical voltage by means of traveling standard were carried out in the following order: first – measurements of impulse electrical voltage on GET 182-2010, then – on the original standard of BelGIM and finally – again on GET 182-2010. Processing of the results of comparison according to χ2(i) criterion showed that χ2(i) criterion values (calculated on the basis of the measurement results) doesn’t exceed a critical value χ2, that is the objective confirmation of announced uncertainties, declared by the participants of comparison.

State special primary acceleration measurement standard for gravimetry GET 190-2019

2020 ◽  
pp. 3-8
Author(s):  
L.F. Vitushkin ◽  
F.F. Karpeshin ◽  
E.P. Krivtsov ◽  
P.P. Krolitsky ◽  
V.V. Nalivaev ◽  
...  
Keyword(s):  
High Precision ◽  
Free Fall ◽  
Measurement Range ◽  
Measurement Standard ◽  
Acceleration Measurement ◽  
Measurement Systems ◽  
Free Fall Acceleration ◽  
Investigation Methods ◽  
Measurement Results ◽  
Upper Level

The State special primary acceleration measurement standard for gravimetry (GET 190-2019), its composition, principle of operation and basic metrological characteristics are presented. This standard is on the upper level of reference for free-fall acceleration measurements. Its accuracy and reliability were improved as a result of optimisation of the adjustment procedures for measurement systems and its integration within the upgraded systems, units and modern hardware components. A special attention was given to adjusting the corrections applied to measurement results with respect to procedural, physical and technical limitations. The used investigation methods made it possibled to confirm the measurement range of GET 190-2019 and to determine the contributions of main sources of errors and the total value of these errors. The measurement characteristics and GET 90-2019 were confirmed by the results obtained from measurements of the absolute value of the free fall acceleration at the gravimetrical site “Lomonosov-1” and by their collation with the data of different dates obtained from measurements by high-precision foreign and domestic gravimeters. Topicality of such measurements ensues from the requirements to handle the applied problems that need data on parameters of the Earth gravitational field, to be adequately faced. Geophysics and navigation are the main fields of application for high-precision measurements in this field.

PTB for Climate Sciences: Combined efforts supporting the European Metrology Network for Climate and Ocean Observation

2020 ◽  
Author(s):  
Olav Werhahn ◽  
Christian Monte ◽  
Steffen Seitz
Keyword(s):  
Infrared Radiation ◽  
Working Group ◽  
Radiation Thermometry ◽  
Measurement Techniques ◽  
Gas Analysis ◽  
National Metrology Institute ◽  
Climate Research ◽  
Calibration And Measurement Capabilities ◽  
Working Groups ◽  
Measurement Capabilities

&lt;p&gt;&lt;span&gt;The German national metrology institute Physikalisch-Technische Bundesanstalt (PTB) is organized in typical different sections and divisions, each of them bringing in their own portfolio on specific calibration and measurement capabilities. Customer are being served on various fields of work and metrological SI-traceability strategies are developed for all the units of measurements. However, despite many third-party projects driven by individual PTB groups [1], as for example within the European Metrology Programme for Innovation and Research (EMPIR, [2]) and its different Environmental calls, PTB has never been seen itself as a climate research institute. With the foundation of the European Metrology Network for Climate and Ocean Observation (EMN) [3], PTB has now brought its various expertise on metrology for climate research to a new level of combination.&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;The presentation highlights the input from three different working groups of PTB to the EMN related to its sections &amp;#8220;Atmosphere&amp;#8221;, &amp;#8220;Ocean&amp;#8221;, and &amp;#8220;Land&amp;#8221; as being addressed by the groups for Spectrometric Gas Analysis [4], Electrochemistry [5], and Infrared Radiation Thermometry [6], respectively. With those expertise PTB seeks to support the idea of the EMN bringing in measurement techniques like in situ laser spectroscopy-based species quantification, FTIR-based analysis of atmospheric gases and related spectral line parameters of key greenhouse gases and offering its consulting services to the EMN in the &amp;#8220;Atmosphere&amp;#8221; section. On the &amp;#8220;Ocean&amp;#8221; section of the EMN PTB offers its expertise based on ph-measurements, salinity definitions and respective calibration and measurement capabilities, whereas the &amp;#8220;Land&amp;#8221; section of the EMN is benefitting from PTB&amp;#8217;s application-specific traceability concepts for infrared radiation thermometry and infrared radiometry and for quantitative thermography and for emissivity measurements in the field of satellite-, aircraft- and ground-based optical remote sensing of the atmosphere and Earth (-90 &amp;#176;C to 100 &amp;#176;C).&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;Examples for all three working groups will be presented and discussed in view of there benefit to the EMN. Collaboration with European partners will be shown.&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;Acknowledgements:&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;Parts of the work &lt;/span&gt;has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme. PTB acknowledges the collaboration with all partners in the EMN for Climate and Ocean Observation.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;span&gt;References:&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[1] EMPIR 16ENV05 MetNO2 (http://empir.npl.co.uk/metno2/), EMPIR 16ENV06 SIRS (https://www.vtt.fi/sites/SIRS/), EMPIR 16ENV08 (http://empir.npl.co.uk/impress/&lt;/span&gt;&lt;span&gt;)&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[2] European Metrology Programme for Innovation and Research, https://www.euramet.org/research-innovation/research-empir/?L=0&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[3] European Metrology Network for Climate and Ocean Observation, https://www.euramet.org/european-metrology-networks/climate-and-ocean-observation/?L=0&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[4] PTB working group Spectrometric Gas Analysis, https://www.ptb.de/cms/en/ptb/fachabteilungen/abt3/fb-34/ag-342.html&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[5] PTB working group Electrochemistry, https://www.ptb.de/cms/en/ptb/fachabteilungen/abt3/fb-31/ag-313.html&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;[6] PTB working group Infrared Radiation Thermometry https://www.ptb.de/cms/en/ptb/fachabteilungen/abt7/fb-73/ag-732.html&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

Re-Evaluation of Calibration and Measurement Capabilities of Pitch Calibration Systems Designed by Using the Diffraction Method

2017 ◽  
Vol 11 (5) ◽  
pp. 691-698
Author(s):  
Ichiko Misumi ◽  
Jun-ichiro Kitta ◽  
Ryosuke Kizu ◽  
Akiko Hirai ◽  
◽  
...  
Keyword(s):  
Semiconductor Industry ◽  
Diffraction Method ◽  
Reference Value ◽  
Critical Dimension ◽  
National Metrology Institute ◽  
Calibration Laboratory ◽  
Long Term Stability ◽  
Calibration And Measurement Capabilities ◽  
Electron Microscopes ◽  
Measurement Capabilities

One-dimensional grating is one of the most important standards that are used to calibrate magnification of critical-dimension scanning electron microscopes (CD-SEMs) in the semiconductor industry. Long-term stability of pitch calibration systems is required for the competence of testing and calibration laboratories determined in ISO/IEC 17025:2005. In this study, calibration and measurement capabilities of two types of pitch calibration systems owned by a calibration laboratory are re-evaluated through comparison to a reference value and its expanded uncertainty given by a metrological atomic force microscope (metrological AFM) at National Metrology Institute of Japan (NMIJ), AIST. The calibration laboratory’s pitch calibration systems are designed by using the diffraction method (optical and X-ray).

scholarly journals Metrological framework to support accurate, reliable, and reproducible nucleic acid measurements

2021 ◽  
Author(s):  
Mojca Milavec ◽  
Megan H. Cleveland ◽  
Young-Kyung Bae ◽  
Robert I. Wielgosz ◽  
Maxim Vonsky ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Metrology In Chemistry ◽  
Amount Of Substance ◽  
Dna And Rna ◽  
Measurement Results ◽  
Metrological Infrastructure ◽  
Nucleic Acid Analysis ◽  
Primary Focus ◽  
Analysis Working Group ◽  
Measurement Capabilities

Abstract Nucleic acid analysis is used in many areas of life sciences such as medicine, food safety, and environmental monitoring. Accurate, reliable measurements of nucleic acids are crucial for maximum impact, yet users are often unaware of the global metrological infrastructure that exists to support these measurements. In this work, we describe international efforts to improve nucleic acid analysis, with a focus on the Nucleic Acid Analysis Working Group (NAWG) of the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM). The NAWG is an international group dedicated to improving the global comparability of nucleic acid measurements; its primary focus is to support the development and maintenance of measurement capabilities and the dissemination of measurement services from its members: the National Metrology Institutes (NMIs) and Designated Institutes (DIs). These NMIs and DIs provide DNA and RNA measurement services developed in response to the needs of their stakeholders. The NAWG members have conducted cutting edge work over the last 20 years, demonstrating the ability to support the reliability, comparability, and traceability of nucleic acid measurement results in a variety of sectors.

scholarly journals Експериментальне визначення стану текстильних матеріалів десантної парашутної системи Д-5 серії 2 після тривалого зберігання. Повідомлення 2. Статистичні характеристики результатів вимірювання показників строп основного парашуту

2021 ◽  
pp. 4-11
Author(s):  
Олександр Олександрович Корольов ◽  
Ігор Михайлович Сила ◽  
Вадим Васильович Гейко ◽  
Ольга Іллівна Сиза
Keyword(s):  
Relative Error ◽  
Measurement Range ◽  
External Factors ◽  
Accuracy Class ◽  
Elongation At Break ◽  
Long Term Storage ◽  
Measurement Results ◽  
Analysis Package ◽  
Current Article ◽  
Internal And External Factors

The subject of the article is the analysis of the array of experimental data of loading and elongation at break of the slings of the main parachute landing parachute systems D-5 series 2 1973 and 1974 years of manufacture after long-term storage with zero (inexhaustible) resource. The current article attempts to determine the ratio of external factors related to the natural factors of aging of polymers, and internal, due to errors in the measurement process, based on statistical analysis of measurement results. Objective: to determine the degree of influence of internal and external factors on the process and result of measuring indicators. The following methods and equipment were used. An improved method of spot sampling of the samples under study of landing parachute systems D-5 series 2 for laboratory studies to determine the load at break and elongation at break of the slings of the main parachute. Measurements were performed on a machine of bursting brand ИР 5047-50M2C, accuracy class - 0.5 for the measurement range from 0.5 kN to 5 kN. The volume of the party was 25 parachute systems, only 250 elementary tests. The array of empirical data was processed by mathematical and statistical methods of the software package Descriptive statistics on the add-on of MS EXCEL Analysis Package. The following results were obtained. The relative error of the results of load measurement when breaking the slings of the domes of parachutes of 1973 production was ± 5.0%, for parachutes of 1974 production - ± 3.8%. The relative error of the results of measuring the elongation at the break of the slings of the domes of parachutes of 1973 manufacture was ± 2.9%, for parachutes of 1974 manufacture ± 3.3%. Given that the measuring instrument has an error of ± 0.29% in the passport, which can be considered systematic, the overall level of uncertainty is acceptable for conventional measurements in engineering. Conclusions. The main factors of accidental errors in the process of measuring the load at break and elongation at break of the slings of the main parachute are external factors due to the state of the cord structure and changes in the internal structure of the polymer.

scholarly journals In-Situ Wireless Pressure Measurement Using Zero-Power Packaged Microwave Sensors

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1263 ◽  
Author(s):  
Julien Philippe ◽  
Maria De Paolis ◽  
Dominique Henry ◽  
Alexandre Rumeau ◽  
Antony Coustou ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Pressure Sensors ◽  
Measurement Range ◽  
Full Scale ◽  
Remote Measurement ◽  
Reverberant Environments ◽  
Indoor Wireless ◽  
Measurement Results ◽  
Radar Imagery ◽  
First Time

This paper reports the indoor wireless measurement of pressure from zero-power (or passive) microwave (24 GHz) sensors. The sensors are packaged and allow the remote measurement of overpressure up to 2.1 bars. Their design, fabrication process and packaging are detailed. From the measurement of sensor scattering parameters, the outstanding sensitivity of 995 MHz/bar between 0.8 and 2.1 bars was achieved with the full-scale measurement range of 1.33 GHz. Moreover, the 3D radar imagery technique was applied for the remote interrogation of these sensors in electromagnetic reverberant environments. The full-scale dynamic range of 4.9 dB and the sensitivity of 4.9 dB/bar between 0.7 and 1.7 bars were achieved with radar detection in a highly reflective environment. These measurement results demonstrate for the first time the ability of the radar imagery technique to interrogate fully passive pressure sensors in electromagnetic reverberant environments.

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