Modern approaches to ensure traceability of fast electrical pulse processes measurements

2021 ◽  
pp. 47-53
Author(s):  
Andrey V. Kleopin ◽  
Ivan M. Malay
Keyword(s):  
International System ◽  
Ultra Wideband ◽  
Special Standard ◽  
Sampling System ◽  
Electric Voltage ◽  
Optical Sampling ◽  
System Of Units ◽  
Electrical Pulses ◽  
System Approaches ◽  
New System

The necessity of improving the State primary special standard for a unit of pulsed electric voltage GET 182-2010 is substantiated on the basis of an electro-optical sampling system. Approaches to ensure the uniformity of pulse measurements are proposed, aimed at developing a new system of measurements traceability of pulsed signals parameters to the units of the International System of Units, as well as ensuring independent reproduction of reference ultra-wideband electrical pulses. The considered approaches can be used to work on GET 182-2010 improvement. The main tasks of further research in the direction of creating a domestic electro-optical sampling system are formulated.

scholarly journals "What is The SI?” A Proposal for an Educational Adjunct to the Redefinition of the International System of Units

2018 ◽  
Vol 123 ◽  
Author(s):  
Neil M. Zimmerman ◽  
David B. Newell
Keyword(s):  
High School ◽  
Undergraduate Students ◽  
International System ◽  
Physics Courses ◽  
System Of Units ◽  
Elementary Charge ◽  
The Subject ◽  
Base Units ◽  
New System ◽  
Constants Of Nature

We discuss how the impending redefinition of the SI system of units might affect the ability of students to understand the link between the units and the new system. The redefinition will no longer define a set of base units, but rather a set of constants of nature, such as the elementary charge, e. We point out that this list of constants need not be the only way to introduce students to the subject, either in class or in textbooks. We suggest an alternative way to introduce high school and undergraduate students to the redefined SI, by suggesting a list of experiments for some units; this list would be completely compatible with the redefined SI, and would have all of the same scientific and technological advantages. We demonstrate by questionnaire results that this alternative is more appealing to students. We hope to spur a discussion amongst teachers regarding this important topic for high school and undergraduate physics courses.

Dimensions of plane and solid angles and their units in the International System of Units (SI)

2020 ◽  
pp. 26-32
Author(s):  
M. I. Kalinin ◽  
L. K. Isaev ◽  
F. V. Bulygin
Keyword(s):  
Solid Angle ◽  
International System ◽  
International Committee ◽  
Plane Angle ◽  
Arc Length ◽  
Weights And Measures ◽  
International System Of Units ◽  
System Of Units ◽  
In Series ◽  
Solid Angles

The situation that has developed in the International System of Units (SI) as a result of adopting the recommendation of the International Committee of Weights and Measures (CIPM) in 1980, which proposed to consider plane and solid angles as dimensionless derived quantities, is analyzed. It is shown that the basis for such a solution was a misunderstanding of the mathematical formula relating the arc length of a circle with its radius and corresponding central angle, as well as of the expansions of trigonometric functions in series. From the analysis presented in the article, it follows that a plane angle does not depend on any of the SI quantities and should be assigned to the base quantities, and its unit, the radian, should be added to the base SI units. A solid angle, in this case, turns out to be a derived quantity of a plane angle. Its unit, the steradian, is a coherent derived unit equal to the square radian.

scholarly journals A quantum ampere

2020 ◽  
Vol 87 (4) ◽  
pp. 258-265
Author(s):  
Luca Callegaro
Keyword(s):  
Electric Current ◽  
International System ◽  
International System Of Units ◽  
System Of Units ◽  
Elementary Charge ◽  
User Friendly

AbstractThe revision of the International System of Units (SI), implemented since 20 May 2019, has redefined the unit of electric current, the ampere ( A), linking it to a fixed value of the elementary charge. This paper discusses the new definition and the realisation of the electrical units by quantum electrical metrology standards, which every year become more and more accessible, reliable and user friendly.

SI, the international system of units

1973 ◽  
Vol 1 (2) ◽  
pp. 217-241 ◽  
Author(s):  
Wm. Markowitz
Keyword(s):  
International System ◽  
International System Of Units ◽  
System Of Units

Investigation on the Noise Separation in Watt Balance Experiments

2008 ◽  
Vol 381-382 ◽  
pp. 619-622
Author(s):  
W. Zeng ◽  
Xiang Qian Jiang ◽  
P. Scott ◽  
L. Blunt
Keyword(s):  
Background Noise ◽  
International System ◽  
Histogram Method ◽  
Stationary Noise ◽  
Vibration Data ◽  
System Of Units ◽  
Environmental Vibration ◽  
Transient Events ◽  
Watt Balance ◽  
Definition Of

The detection of stationary and non-stationary noise in environmental vibration data is an important issue when considering the precision of the Watt balance, an electromechanical apparatus for the new definition of the kilogram in the international system of Units (SI). In this paper, the authors propose a frequency histogram method to find the structure of the stationary noise from large amount of datasets. For the non-stationary noise, the authors propose a wavelet based denoising methods to distinguish the transient events from the background “noise”, to find their duration and content and to identify their location in time.

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