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    Wyświetlanie 1-4 z 4
    Tytuł:
    An investigation on using the falling mass technique for dynamic force calibrations
    Autorzy:
    Gelany, Shaker A.
    Mahmoud, Gouda M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849008.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    calibration
    dynamic calibration
    impact force
    falling weight
    Opis:
    In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 455-463
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An investigation on using the falling mass technique for dynamic force calibrations
    Autorzy:
    Gelany, Shaker A.
    Mahmoud, Gouda M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849097.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    calibration
    dynamic calibration
    impact force
    falling weight
    Opis:
    In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 455-463
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An investigation on using the falling mass technique for dynamic force calibrations
    Autorzy:
    Gelany, Shaker A.
    Mahmoud, Gouda M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849140.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    calibration
    dynamic calibration
    impact force
    falling weight
    Opis:
    In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 455-463
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Establishing and characterizing a permanent magnet system for the prototype of NISs Kibble balance
    Autorzy:
    Emira, Sayed
    Shaaban, E. R.
    Rashad, M. M.
    Gelany, Shaker A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2203366.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Kibble balance
    Planck constant
    magnet system
    magnetic field
    Opis:
    The Kibble balance experiment is used to redefine the kilogram as a unit of mass based on the Planck constant. To demonstrate and understand the basic principle of the Kibble balance, the National Institute of Standards (NIS)-Egypt has constructed a prototype Kibble balance that can measure gram-level masses with 0.01% relative uncertainty. Through the construction of this prototype, the challenges can be studied and addressed to overcome the weaknesses of NIS’s prototype. This study presents the design and construction of the prototype Kibble balance. It also focuses on the design and performance of the magnetic system, which is a crucial element of the Kibble balance. Analytical modeling and finite element analysis were used to evaluate and improve the magnet system. Several other aspects were also discussed, including the yoke’s material and enhancing the magnetic profile within the air gap of the magnet system. Over a vertical distance of 30 mm inside the air gap, the magnetic flux density was found to be 0.3 T, and the uniformity was found to be 8 x 10-5.
    Źródło:
    Metrology and Measurement Systems; 2023, 30, 1; 3--16
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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