Pub Date : 2025-05-01DOI: 10.1016/j.measen.2024.101364
Binghui Ma , Jie Chen , Yaohua Qiu , Dongbin Shen
OIML R 76 is a recommendation file of non-automatic weighing instruments (NAWI), which is widely accepted by member countries. As an instrument for trade using, NAWI is known intimately and easy to judge weighing correct. In OIML R 76, there are , and , usually is as the final error compared with maximum permitted error, , which are complex concepts; but in fundamental ideas, error looks simply, which is equal to difference value of indicating value and standard value. The error model is the central issue discussed and studied in this paper, aiming to propose a modified error calculation method that harmonises theory with practical application.
{"title":"Analysis and research on error calculation model of OIML R 76 and reality application","authors":"Binghui Ma , Jie Chen , Yaohua Qiu , Dongbin Shen","doi":"10.1016/j.measen.2024.101364","DOIUrl":"10.1016/j.measen.2024.101364","url":null,"abstract":"<div><div>OIML R 76 is a recommendation file of non-automatic weighing instruments (NAWI), which is widely accepted by member countries. As an instrument for trade using, NAWI is known intimately and easy to judge weighing correct. In OIML R 76, there are <span><math><mrow><msub><mi>E</mi><mn>0</mn></msub></mrow></math></span>, <span><math><mrow><mi>E</mi></mrow></math></span> and <span><math><mrow><msub><mi>E</mi><mi>c</mi></msub></mrow></math></span>, usually <span><math><mrow><msub><mi>E</mi><mi>c</mi></msub></mrow></math></span> is as the final error compared with maximum permitted error, <span><math><mrow><msub><mi>E</mi><mi>c</mi></msub><mo>=</mo><mi>E</mi><mo>−</mo><msub><mi>E</mi><mn>0</mn></msub></mrow></math></span>, which are complex concepts; but in fundamental ideas, error looks simply, which is equal to difference value of indicating value and standard value. The error model is the central issue discussed and studied in this paper, aiming to propose a modified error calculation method that harmonises theory with practical application.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101364"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present paper explores effective teaching strategies for fundamental concepts in measurement systems analysis, with a focus on the GR&R methodology (Repeatability and Reproducibility). The study introduces an innovative approach by employing ‘extreme’ cases to illustrate the utility of GR&R. The methodology involves selecting these extreme cases to present students with diverse challenges mirroring real-world situations. Preliminary results indicate the benefits of combining easy and complex measurement systems, where the familiar multimeter-alkaline batteries combination facilitates quick comprehension of basic concepts, while the unconventional plastic rule-pencils combination poses unique challenges. Analytic Hierarchy Process (AHP) is applied for a structured quantitative comparison of the instrument/pieces combinations. The findings emphasize the importance of considering system complexity in interpreting GR&R results, highlighting the need for students to apply basic concepts to unconventional situations. Ultimately, the integration of extreme cases through AHP analysis proves to be an effective pedagogical strategy, enhancing students' applied understanding and analytical skills in measurement systems GR&R analysis.
{"title":"Teaching GAGE repeatability and reproducibility analysis of measurement systems: Choice of the best didactic cases","authors":"Kenia-Dessiré Salazar-Hernández, Luis-Eduardo Hernández-Balandrán, Omar-Jair Purata-Sifuentes","doi":"10.1016/j.measen.2024.101313","DOIUrl":"10.1016/j.measen.2024.101313","url":null,"abstract":"<div><div>The present paper explores effective teaching strategies for fundamental concepts in measurement systems analysis, with a focus on the GR&R methodology (Repeatability and Reproducibility). The study introduces an innovative approach by employing ‘extreme’ cases to illustrate the utility of GR&R. The methodology involves selecting these extreme cases to present students with diverse challenges mirroring real-world situations. Preliminary results indicate the benefits of combining easy and complex measurement systems, where the familiar multimeter-alkaline batteries combination facilitates quick comprehension of basic concepts, while the unconventional plastic rule-pencils combination poses unique challenges. Analytic Hierarchy Process (AHP) is applied for a structured quantitative comparison of the instrument/pieces combinations. The findings emphasize the importance of considering system complexity in interpreting GR&R results, highlighting the need for students to apply basic concepts to unconventional situations. Ultimately, the integration of extreme cases through AHP analysis proves to be an effective pedagogical strategy, enhancing students' applied understanding and analytical skills in measurement systems GR&R analysis.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101313"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.measen.2024.101314
Luís Lages Martins , João Pedro Mendonça , Álvaro Ribeiro , Miguel Azenha
This paper describes the development of a Measurement Science curricular unit within the “Option UMinho” academic framework. The objectives of the proposed curricular unit are presented, and the corresponding curricular program described in detail. Teaching methods and resources are also discussed in the paper. In addition, the knowledge assessment strategy is mentioned as well as the expected learning outcomes related to the proposed unit.
{"title":"Development of a measurement science curricular unit within the “Option Uminho” academic framework","authors":"Luís Lages Martins , João Pedro Mendonça , Álvaro Ribeiro , Miguel Azenha","doi":"10.1016/j.measen.2024.101314","DOIUrl":"10.1016/j.measen.2024.101314","url":null,"abstract":"<div><div>This paper describes the development of a Measurement Science curricular unit within the “Option UMinho” academic framework. The objectives of the proposed curricular unit are presented, and the corresponding curricular program described in detail. Teaching methods and resources are also discussed in the paper. In addition, the knowledge assessment strategy is mentioned as well as the expected learning outcomes related to the proposed unit.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101314"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.measen.2024.101367
Monika Sej , Krzysztof Stępień
The global redefinition of the kilogram has increased the importance of precision in the transfer of mass units, posing challenges for National Metrology Institutes, including the Central Office of Measures (GUM) in Poland. The article addresses the issue of mass measurements using high-precision comparators. Such measurements are conducted at the Central Office of Measures (GUM) in Poland. To enhance the capabilities of the Mass Laboratory at GUM, a new AVK1000 comparator was purchased. However, initial measurements with the new comparator indicated significant discrepancies in the obtained results. Therefore, a comparative study of the new comparator and the previously used comparator was conducted.
A comparative analysis of the new AVK1000 mass comparator with the previous AT1006 comparator revealed that the new station did not meet the expected repeatability parameters. The AVK1000 showed significantly greater variability, indicating the need for further improvements. The modernisation project included the delivery and installation of the measurement module, achieving high vacuum, and equipping it for measurements in an inert gas atmosphere. Additionally, the analysis of the impact of vibrations on measurement repeatability highlighted the need for further research on their influence on accuracy.
{"title":"Comparative studies of stations for transferring mass units","authors":"Monika Sej , Krzysztof Stępień","doi":"10.1016/j.measen.2024.101367","DOIUrl":"10.1016/j.measen.2024.101367","url":null,"abstract":"<div><div>The global redefinition of the kilogram has increased the importance of precision in the transfer of mass units, posing challenges for National Metrology Institutes, including the Central Office of Measures (GUM) in Poland. The article addresses the issue of mass measurements using high-precision comparators. Such measurements are conducted at the Central Office of Measures (GUM) in Poland. To enhance the capabilities of the Mass Laboratory at GUM, a new AVK1000 comparator was purchased. However, initial measurements with the new comparator indicated significant discrepancies in the obtained results. Therefore, a comparative study of the new comparator and the previously used comparator was conducted.</div><div>A comparative analysis of the new AVK1000 mass comparator with the previous AT1006 comparator revealed that the new station did not meet the expected repeatability parameters. The AVK1000 showed significantly greater variability, indicating the need for further improvements. The modernisation project included the delivery and installation of the measurement module, achieving high vacuum, and equipping it for measurements in an inert gas atmosphere. Additionally, the analysis of the impact of vibrations on measurement repeatability highlighted the need for further research on their influence on accuracy.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101367"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.measen.2024.101318
Praanesh Sambath , Karl Neuhold , Simon Genser , Hubert Zangl , Anton Scheibelmasser
Simulation tools for Frequency-Modulated Continuous-Wave (FMCW) radar technology present a transformative approach in teaching and educating engineers and students about FMCW Radars. By emulating real-world scenarios, these tools offer a hands-on experience in understanding and optimizing radar systems, without the high costs associated with physical prototypes. The ability to simulate various environmental conditions, including interference and noise, allows learners to experiment with different radar parameters such as antenna alignment and operating frequency. This interactive learning environment accelerates the comprehension of complex radar concepts, from the Doppler effect to signal processing techniques, facilitating a deeper understanding of FMCW radar operations. As a teaching example, we propose and compare the simulation results of two radars with different radar parameters and antenna configurations. Additionally, we discuss how the standalone simulation results can be integrated and utilized as inputs for other tools using co-simulation approach. Based on this example, the advantages of using simulation for education are explored, and the reliability of the simulation is evaluated by comparing it with the results from a real radar.
{"title":"Enhancing teaching of FMCW radar sensors by means of dedicated simulation tools","authors":"Praanesh Sambath , Karl Neuhold , Simon Genser , Hubert Zangl , Anton Scheibelmasser","doi":"10.1016/j.measen.2024.101318","DOIUrl":"10.1016/j.measen.2024.101318","url":null,"abstract":"<div><div>Simulation tools for Frequency-Modulated Continuous-Wave (FMCW) radar technology present a transformative approach in teaching and educating engineers and students about FMCW Radars. By emulating real-world scenarios, these tools offer a hands-on experience in understanding and optimizing radar systems, without the high costs associated with physical prototypes. The ability to simulate various environmental conditions, including interference and noise, allows learners to experiment with different radar parameters such as antenna alignment and operating frequency. This interactive learning environment accelerates the comprehension of complex radar concepts, from the Doppler effect to signal processing techniques, facilitating a deeper understanding of FMCW radar operations. As a teaching example, we propose and compare the simulation results of two radars with different radar parameters and antenna configurations. Additionally, we discuss how the standalone simulation results can be integrated and utilized as inputs for other tools using co-simulation approach. Based on this example, the advantages of using simulation for education are explored, and the reliability of the simulation is evaluated by comparing it with the results from a real radar.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101318"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.measen.2024.101423
A. Alimenti , F. Cologgi , E. Silva , S. Fabiani , A. Rubini , P. Loffredo , G. Lombardi , P. Soffitta , E. Del Monte , E. Costa , N. De Angelis , S. Di Cosimo , F. Muleri , A. Di Marco , A. Terracciano , E. Zaccagnino , I. Donnarumma , D. Brienza , G. Leccese , A. Fedele , G. Minervini
Solar flares, dynamic eruptions of electromagnetic radiation from the Sun's surface, represent a potential risk for various human technological infrastructures. The CUbesat Solar Polarimeter (CUSP) project, part of the Alcor Program of the Italian Space Agency, aims to measure solar flare polarization in the hard X-ray band. This paper focuses on the design and setup of a measurement system to characterize the response of the avalanche photodiodes (APD) used in the CUSP polarimeter. The system is tested at room temperature conditions by varying both incident photon energy between 20 keV and 135 keV, using X-ray sources as references, and APD bias voltage from 260 V to 410 V. Using the calibrated system, the dependence of APD gain on bias voltage, and its energy resolution, are measured, matching the metrological standards of the polarimeter.
{"title":"Development and calibration of a measurement system for the characterization of avalanche photodiodes prospectively used as sensors in X-ray Compton polarimeters for space","authors":"A. Alimenti , F. Cologgi , E. Silva , S. Fabiani , A. Rubini , P. Loffredo , G. Lombardi , P. Soffitta , E. Del Monte , E. Costa , N. De Angelis , S. Di Cosimo , F. Muleri , A. Di Marco , A. Terracciano , E. Zaccagnino , I. Donnarumma , D. Brienza , G. Leccese , A. Fedele , G. Minervini","doi":"10.1016/j.measen.2024.101423","DOIUrl":"10.1016/j.measen.2024.101423","url":null,"abstract":"<div><div>Solar flares, dynamic eruptions of electromagnetic radiation from the Sun's surface, represent a potential risk for various human technological infrastructures. The CUbesat Solar Polarimeter (CUSP) project, part of the Alcor Program of the Italian Space Agency, aims to measure solar flare polarization in the hard X-ray band. This paper focuses on the design and setup of a measurement system to characterize the response of the avalanche photodiodes (APD) used in the CUSP polarimeter. The system is tested at room temperature conditions by varying both incident photon energy between 20 keV and 135 keV, using X-ray sources as references, and APD bias voltage from 260 V to 410 V. Using the calibrated system, the dependence of APD gain on bias voltage, and its energy resolution, are measured, matching the metrological standards of the polarimeter.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101423"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper addresses the underrepresentation of women in Science, Technology, Engineering, and Mathematics (STEM), focusing on the often-overlooked field of metrology in Latin American and Caribbean (LAC) countries. Despite LAC nations having nearly 50 % women in engineering research, metrology lags, and this study delves into the historical context, statistical representation, and current research areas within the LAC region. A survey among female researchers in metrology reveals their experiences and challenges, highlighting the role of successful women in motivating their peers. Despite a historical gender gap in engineering and science disciplines, women are increasingly present in higher education, particularly in certain fields. The paper concludes by stressing the importance of mentorship in shaping the careers of female scientists and advocates for broader research encompassing all LAC countries to foster gender diversity in metrology. The findings contribute to the ongoing dialogue on gender diversity in STEM, emphasizing the need for sustained efforts to empower women in metrology and related disciplines.
{"title":"Participation of Latin American women in metrology: Challenges and opportunities in industry and research/academia","authors":"Carla-Cristina López-Canchola, Katia Sierra-Ferreyra, Omar-Jair Purata-Sifuentes","doi":"10.1016/j.measen.2024.101324","DOIUrl":"10.1016/j.measen.2024.101324","url":null,"abstract":"<div><div>This paper addresses the underrepresentation of women in Science, Technology, Engineering, and Mathematics (STEM), focusing on the often-overlooked field of metrology in Latin American and Caribbean (LAC) countries. Despite LAC nations having nearly 50 % women in engineering research, metrology lags, and this study delves into the historical context, statistical representation, and current research areas within the LAC region. A survey among female researchers in metrology reveals their experiences and challenges, highlighting the role of successful women in motivating their peers. Despite a historical gender gap in engineering and science disciplines, women are increasingly present in higher education, particularly in certain fields. The paper concludes by stressing the importance of mentorship in shaping the careers of female scientists and advocates for broader research encompassing all LAC countries to foster gender diversity in metrology. The findings contribute to the ongoing dialogue on gender diversity in STEM, emphasizing the need for sustained efforts to empower women in metrology and related disciplines.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101324"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.measen.2024.101429
Mariano Pentella, Susana Izquierdo Bermudez, Carlo Petrone, Herve Prin, Stephan Russenschuck, Ezio Todesco
Magnetic measurements of superconducting magnets at room temperature are performed for quality control and alignment, aiming to position the cold mass accurately, namely the assembly of one or more magnets in its cryo-vessel. The main challenge in performing these measurements is related to the sensitivity of the transducer, as the field values achievable in the magnet bore are in the 1 mT range. The single stretched-wire method is a proven technique for measuring DC-powered normal-conducting and superconducting accelerator magnets. It is vastly used to locate the magnetic axis in quadrupole magnets and higher-order magnets for their alignment and positioning in the accelerator. However, it fails to provide accurate measurements when used to measure superconducting magnets at room temperature because the typical magnet current levels are three orders of magnitude lower than the nominal level used in operation, leading to field values scaling by the same order of magnitude. The problem of the alignment of superconducting quadrupole magnets at room temperature has already been addressed in the literature by adopting alternating current (AC) magnet powering to enhance measurement sensitivity. This paper presents a comprehensive overview of the single stretched-wire method with AC magnet powering, showcasing the different performance compared with the DC powering technique. To further validate the method, a case study of a superconducting quadrupole magnet is presented, and the results are compared against those from a rotating coil scanner.
{"title":"Field-axis measurement of an AC-powered magnet by a single stretched wire","authors":"Mariano Pentella, Susana Izquierdo Bermudez, Carlo Petrone, Herve Prin, Stephan Russenschuck, Ezio Todesco","doi":"10.1016/j.measen.2024.101429","DOIUrl":"10.1016/j.measen.2024.101429","url":null,"abstract":"<div><div>Magnetic measurements of superconducting magnets at room temperature are performed for quality control and alignment, aiming to position the cold mass accurately, namely the assembly of one or more magnets in its cryo-vessel. The main challenge in performing these measurements is related to the sensitivity of the transducer, as the field values achievable in the magnet bore are in the 1 mT range. The single stretched-wire method is a proven technique for measuring DC-powered normal-conducting and superconducting accelerator magnets. It is vastly used to locate the magnetic axis in quadrupole magnets and higher-order magnets for their alignment and positioning in the accelerator. However, it fails to provide accurate measurements when used to measure superconducting magnets at room temperature because the typical magnet current levels are three orders of magnitude lower than the nominal level used in operation, leading to field values scaling by the same order of magnitude. The problem of the alignment of superconducting quadrupole magnets at room temperature has already been addressed in the literature by adopting alternating current (AC) magnet powering to enhance measurement sensitivity. This paper presents a comprehensive overview of the single stretched-wire method with AC magnet powering, showcasing the different performance compared with the DC powering technique. To further validate the method, a case study of a superconducting quadrupole magnet is presented, and the results are compared against those from a rotating coil scanner.</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101429"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.measen.2024.101345
Zhimin Zhang , Gang Hu , Yue Zhang , Feng Meng , Wei Zhang , Tao Li
Deadweight torque standard machines have characteristics of lower uncertainty and good stability. This 100 kN·m torque standard machine adopts the moment arm/deadweight type. The main knife assembly is adopted to support the moment arm which has low friction under high bearing capacity, the moment arm system is precisely machined and adjusted to ensure parallelism between main knife edge and side knife edges. By using weight groups of inner-circle and outer-circle, torque values from 1 kN·m to 100 kN·m may be realised. This paper introduces the mechanical structure of the 100 kN·m torque standard machine and describes the results of performance tests and its uncertainty evaluation. The results show that the repeatability of the machine is better than 5 × 10−5 and its uncertainty is less than 1 × 10−4 ( = 3).
{"title":"Development of 100 kN m deadweight torque standard machine at NIM","authors":"Zhimin Zhang , Gang Hu , Yue Zhang , Feng Meng , Wei Zhang , Tao Li","doi":"10.1016/j.measen.2024.101345","DOIUrl":"10.1016/j.measen.2024.101345","url":null,"abstract":"<div><div>Deadweight torque standard machines have characteristics of lower uncertainty and good stability. This 100 kN·m torque standard machine adopts the moment arm/deadweight type. The main knife assembly is adopted to support the moment arm which has low friction under high bearing capacity, the moment arm system is precisely machined and adjusted to ensure parallelism between main knife edge and side knife edges. By using weight groups of inner-circle and outer-circle, torque values from 1 kN·m to 100 kN·m may be realised. This paper introduces the mechanical structure of the 100 kN·m torque standard machine and describes the results of performance tests and its uncertainty evaluation. The results show that the repeatability of the machine is better than 5 × 10<sup>−5</sup> and its uncertainty is less than 1 × 10<sup>−4</sup> (<span><math><mrow><mi>k</mi></mrow></math></span> = 3).</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101345"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The torsional vibration calibration machine with the eccentric shaft is developed in this paper. The standard torsional vibration can be produced by the eccentric shaft at the two ends of the torsional spring, while two servo motors are employed respectively as the driving motor and the loading motor. Both the simulation and the test data illustrate that up to 10° torsional angle amplitude can be excited by the machine corresponding to (0–300) r/min. The uncertainty experimental study of the torsional vibration calibration is also conducted, and the expanded uncertainty of the torsional vibration amplitude is evaluated as 1.2 % (k = 2).
{"title":"Study on the torsional vibration calibration machine with the eccentric shafts","authors":"Xianglong Ma, Hao Wu, Wubin Lyu, Jing Lin, Yuxin Sun, Zheng Mao","doi":"10.1016/j.measen.2024.101347","DOIUrl":"10.1016/j.measen.2024.101347","url":null,"abstract":"<div><div>The torsional vibration calibration machine with the eccentric shaft is developed in this paper. The standard torsional vibration can be produced by the eccentric shaft at the two ends of the torsional spring, while two servo motors are employed respectively as the driving motor and the loading motor. Both the simulation and the test data illustrate that up to 10° torsional angle amplitude can be excited by the machine corresponding to (0–300) r/min. The uncertainty experimental study of the torsional vibration calibration is also conducted, and the expanded uncertainty of the torsional vibration amplitude is evaluated as 1.2 % (<em>k</em> = 2).</div></div>","PeriodicalId":34311,"journal":{"name":"Measurement Sensors","volume":"38 ","pages":"Article 101347"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号