Results 221 to 230 of about 648,618 (252)
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Measurement Techniques, 2017
An installation for measuring the angles of polyhedral prisms is considered, in which autocollimators with digital registration of the coordinates of the optical mark are applied. Algorithms for solving systems of equations for the determination of angles by the method of aggregate measurements with the help of two and three autocollimators are ...
K. V. Chekirda +4 more
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An installation for measuring the angles of polyhedral prisms is considered, in which autocollimators with digital registration of the coordinates of the optical mark are applied. Algorithms for solving systems of equations for the determination of angles by the method of aggregate measurements with the help of two and three autocollimators are ...
K. V. Chekirda +4 more
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Izmeritel`naya Tekhnika, 2021
The history of the creation of the State primary standard of gas volumetric and mass flow rate units GET 118-2017 is presented. The significant role of international comparisons was noted at various stages of the creation of GET 118-2017: the comparisons results confirmed and made it possible to include in the KCDB the calibration and measurement ...
Aleksandr I. Gorchev +2 more
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The history of the creation of the State primary standard of gas volumetric and mass flow rate units GET 118-2017 is presented. The significant role of international comparisons was noted at various stages of the creation of GET 118-2017: the comparisons results confirmed and made it possible to include in the KCDB the calibration and measurement ...
Aleksandr I. Gorchev +2 more
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Ukrainian Metrological Journal
Phase measurements are necessary for determining main parameters of the oscillatory process in complex electrical networks. Most often, it is precisely the phase shift angle (PSA) between two oscillatory processes of the same frequency that is measured.
Oleh Velychko, Yulia Kulish
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Phase measurements are necessary for determining main parameters of the oscillatory process in complex electrical networks. Most often, it is precisely the phase shift angle (PSA) between two oscillatory processes of the same frequency that is measured.
Oleh Velychko, Yulia Kulish
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Measurement Techniques, 2020
GET 183–2019, the State Primary Special Standard of the unit of length in the area of measurements of the parameters of deviations from flatness of optical surfaces, is presented. The standard supports the reproduction, storage, and transmission of the unit of length in the range 0.002–2.000 μm for optical surfaces measuring 50–280 mm in dimension.
D. A. Novikov +3 more
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GET 183–2019, the State Primary Special Standard of the unit of length in the area of measurements of the parameters of deviations from flatness of optical surfaces, is presented. The standard supports the reproduction, storage, and transmission of the unit of length in the range 0.002–2.000 μm for optical surfaces measuring 50–280 mm in dimension.
D. A. Novikov +3 more
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Measurement Techniques, 1986
It has been necessary to revise GOST 8.018-75 and to devise a new state primary standard (SPS) for the unit of linear expansion coefficient (LEC) on account of the extending temperature ranges used with materials, the general use of low-expansion materials, and tightening requirements on accuracy in measuring LEC.
T. I. Malyutina +4 more
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It has been necessary to revise GOST 8.018-75 and to devise a new state primary standard (SPS) for the unit of linear expansion coefficient (LEC) on account of the extending temperature ranges used with materials, the general use of low-expansion materials, and tightening requirements on accuracy in measuring LEC.
T. I. Malyutina +4 more
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Izmeritel`naya Tekhnika
In many areas of science and technology, there is a task to measure the optical and geometric characteristics of thin fi lms. The need to ensure the uniformity of measurements in this area led to the creation of the State primary standard of complex refractive index units GET 203-2012.
G. N. Vishnyakov +2 more
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In many areas of science and technology, there is a task to measure the optical and geometric characteristics of thin fi lms. The need to ensure the uniformity of measurements in this area led to the creation of the State primary standard of complex refractive index units GET 203-2012.
G. N. Vishnyakov +2 more
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Izmeritel`naya Tekhnika
The metrological support of optical-electronic means of measuring spatial coordinates is described. To meet modern consumer requirements for the accuracy of measurements of spatial coordinates with electronic tacheometers and their analogues (laser scanners, absolute trackers), the State primary special standard of the unit of length GET 199-2024 ...
S. I. Donchenko +4 more
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The metrological support of optical-electronic means of measuring spatial coordinates is described. To meet modern consumer requirements for the accuracy of measurements of spatial coordinates with electronic tacheometers and their analogues (laser scanners, absolute trackers), the State primary special standard of the unit of length GET 199-2024 ...
S. I. Donchenko +4 more
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Ukrainian Metrological Journal
The paper discusses the results of a study of metrological characteristics of the state primary measurement standard of volume flow and mass consumption of liquid, as well as the volume and mass of liquid flowing through pipelines (DETU 03-04-04). The study was conducted at the National Scientific Centre “Institute of Metrology” in preparation for ...
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The paper discusses the results of a study of metrological characteristics of the state primary measurement standard of volume flow and mass consumption of liquid, as well as the volume and mass of liquid flowing through pipelines (DETU 03-04-04). The study was conducted at the National Scientific Centre “Institute of Metrology” in preparation for ...
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