scholarly journals Evaluation of metrological reliability of measuring instruments by method of generating functions

2020 ◽  
Vol 28 (2) ◽  
pp. 84-96
Author(s):  
Vladimir N. Yashin
Keyword(s):  
Generating Functions ◽  
Current Trend ◽  
Measuring Instruments ◽  
Metrological Reliability ◽  
Measuring Time ◽  
Time Intervals ◽  
Mathematical Operations ◽  
Discrete Change ◽  
Physical Quantities ◽  
Error Of Measurement

An article deals with problems related to the assessment of metrological reliability of measuring instruments by method of generating functions. Metrological reliability of measuring instruments is the most important characteristic that determines the accuracy and reliability of physical quantities measurements. In the suggested article, a confidence indicator is proposed as an evaluation of metrological reliability. The quantitative value of confidence indicator can be estimated by means of the method of generating functions. This is a scientific novelty of the work. Relevance of the problem of assessing the measuring instruments metrological reliability evaluation is substantiated in this paper since the current trend towards structural and functional complexity of measuring instruments may lead to decreasing of their reliability and, in particular, metrological reliability. The main goal of this work is to systematize the problems of reliability of measuring instruments and evaluate their metrological reliability using the method of generating functions. On the base of selected mathematical model of the evolution of error of measurement and proposed indicator of metrological reliability means of the method of generating functions allow to carry out metrological forecast of variability of the error of measurement depending on time. The model of gradual failures with a discrete change of the error over time, which is typical for a certain class of measuring instruments, for example, measuring time intervals, was chosen as a model for the evolution of the error of measuring instruments. The method of generating functions used for evaluating the metrological reliability of measuring instruments has made it possible to increase the efficiency of the algorithm for quantitative evaluation of metrological reliability of measuring instruments by simplifying the mathematical operations that underlie it.

A precision clock for measuring time intervals

1960 ◽  
Vol 9 (2) ◽  
pp. 221-225 ◽  
Author(s):  
R.W. Findley ◽  
R.A. Reiter ◽  
T.A. Romanowski
Keyword(s):  
Measuring Time ◽  
Time Intervals ◽  
Precision Clock

Diagnosis of Rolling Bearing by Measuring Time Interval of AE Generation

1999 ◽  
Vol 121 (3) ◽  
pp. 468-472 ◽  
Author(s):  
Takeo Yoshioka ◽  
Atsushi Korenaga ◽  
Hiroki Mano ◽  
Takashi Yamamoto
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Bearing ◽  
Rolling Contact ◽  
Time Interval ◽  
Measuring Time ◽  
Time Intervals ◽  
Measured Time ◽  
Ae Signal ◽  
Kinetics Of

We have developed a new method for measuring time intervals of Acoustic Emission (AE) generation for diagnosis of a radial rolling bearing. The method makes the AE signal itself a trigger of the oscillation of the clock pulse and measures the time interval of AE generation by integration of the clock pulses. The measurement device consists of the threshold, clock, time interval measurement and memory circuit, and was applied to rolling contact fatigue experiments. It was confirmed by the experiments that the measured time intervals of AE generation on the inner raceway or the ball agreed with the value calculated based on the kinetics of the rolling bearing. Moreover, we could identify the elements in which a fatigue crack was propagating by the method before the spalling appeared. The identified elements agreed with the failed elements.

Measuring time intervals by circulating pulses with sequential phase shifts

1971 ◽  
Vol 14 (10) ◽  
pp. 1606-1607
Author(s):  
E. G. Lebed'ko ◽  
F. I. Khautyn ◽  
G. A. Aver'yanov
Keyword(s):  
Phase Shifts ◽  
Measuring Time ◽  
Time Intervals ◽  
Sequential Phase

scholarly journals Metrological support of maintenance by the technical state of communication means

2021 ◽  
pp. 17-23
Author(s):  
Yevhen Ryzhov ◽  
Lev Sakovych ◽  
Yurii Myroshnychenko ◽  
Volodymyr Hrabchak ◽  
Yuriy Nastishin ◽  
...  
Keyword(s):  
Metrological Support ◽  
Large Scale ◽  
Technical Condition ◽  
Technical State ◽  
High Tech ◽  
Measuring Instruments ◽  
Metrological Reliability ◽  
Correct Evaluation ◽  
Optimal Sequence ◽  
Minimal Time

Modern and prospective communication means are among the most knowledge-driven, high-tech types of industrial products, which are subject to enhanced requirements for quality and efficiency of application. The effective functioning of modern communication means is provided by built-in software, including metrological support. In this paper, we consider the specifics of metrological maintenance of large-scale communication facilities (tens and hundreds of thousands of elements) consisting of separate subunits, the serviceability, maintenance, and recovery of which can be performed autonomously. It is proposed to enhance the efficiency of the by-state-maintenance (also called maintenance by the technical state) by accounting for the specifics of metrological support, establishing an optimal sequence of operations, selecting the measuring instruments in accordance with relevant requirements. To do this, one has to use a combined indicator composed of individual parameters of the tests and the probability of their preferred choice. This allows to assess the technical condition of the communication means with a given probability during a minimal time. In addition, one can estimate the time of maintenance, taking into account the metrological reliability and the probability of correct evaluation of the result of checking the parameters by the measuring instruments. The order of implementation of the obtained results is formalized in the form of an algorithm and an example of their realization is presented.

Vernier method of measuring time intervals

1980 ◽  
Vol 23 (9) ◽  
pp. 817-820 ◽  
Author(s):  
N. R. Karpov
Keyword(s):  
Measuring Time ◽  
Time Intervals

Instrument for measuring time intervals

1964 ◽  
Vol 7 (7) ◽  
pp. 593-596
Author(s):  
V. N. Glushenkov
Keyword(s):  
Measuring Time ◽  
Time Intervals
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