scholarly journals ANALYSIS OF INSTANT CONTROL METHODS OF MEASURING INSTRUMENTS ERRORS

2018 ◽  
Vol 79 (1) ◽  
pp. 52-57
Author(s):  
Mykola Mykyychuk ◽  
◽  
Kh Repetylo ◽  
I Pryjmachuk ◽  
Y Khoma ◽  
...  
Keyword(s):  
Measuring Instruments ◽  
Control Methods

scholarly journals Monitoring the Accuracy of Measurements the Load of Industrial Enterprises

2020 ◽  
Vol 63 (5) ◽  
pp. 393-410
Author(s):  
V. A. Anishchenko ◽  
T. V. Pisaruk
Keyword(s):  
A Priori ◽  
Normal Operation ◽  
Measuring Instruments ◽  
Control Methods ◽  
Limit Values ◽  
Industrial Enterprises ◽  
Active Load ◽  
Accuracy Of Measurements ◽  
Reliability Control ◽  
Measured Load

The normalized accuracy of the installed measuring instruments determines the scheduled measurement accuracy of the daily active load of an industrial enterprise. To maintain  it during operation, syntactic and semantic methods can be used to control the reliability of load measurements. During syntactic control, the state of measuring instruments that collect and process information about the enterprise’s load is diagnosed. Semantic control is based on the use of probabilistic characteristics of the measured load. The condition necessary for semantic control is the presence of information redundancy about the values of the monitored load. It is possible to control the load limit values (settings) when a priori information is known about the lower and upper limits in which reliably measured load values in normal operation of the enterprise may be contained. The article considers control methods that use a posteriori redundant information about the dynamics of load alterations in various sections of the daily schedule. These methods include monitoring by the first increments of the load, which characterize the speed of its alterations, as well as control using linear and nonlinear extrapolations of the first increments.  The results of the analysis of probabilistic characteristics of the daily active load of the enterprise and its first increments, which characterize the rate of load change, are presented. The effect of probabilistic characteristics of the first load increments on the boundaries of making a decision about the reliability of measurements is demonstrated. A comparative analysis of the effectiveness of reliability control methods based on the first load increments and their extrapolated values  has been carried out on the example of measurements of daily active load schedules of the “Minsk Motor Plant” JSC.

scholarly journals Measuring instruments metrological monitoring in a medical organization based on a process approach

2020 ◽  
Vol 22 (2) ◽  
pp. 138-141
Author(s):  
S. A. Mendel
Keyword(s):  
Process Approach ◽  
Internal Quality ◽  
Measuring Instruments ◽  
Control Methods ◽  
Medical Organization ◽  
Target Indicator ◽  
Metrological Control ◽  
To Receive ◽  
Metrological Monitoring

A model of the process of metrological control of measuring instruments is presented. The model includes 6 or9 stages, depending on the results of metrological control. Based on the list of measuring instruments, a contract is concludedfor metrological control. After the conclusion of the contract, the collection of documents necessary for verification iscollected. Further, the measuring instruments are transferred to an accredited organization. An accredited organization carriesout verification. If, according to the results of verification, the tool is deemed suitable for use, then the stage of obtainingconfirmation of the verification is carried out. The output at this stage will be a verification certificate. If, according to theresults of verification, the measuring instrument is not suitable for operation, then the stage of canceling the verificationcertificate is carried out. The next steps in this case are to receive notice of unsuitability for use and write-off of the measuringinstrument. At this process is considered complete. The target indicators (indicators) of the process are: the measurementerror of specific measuring instruments within the established limits. Monitoring (control) of the process is carried out bya metrology engineer of a medical organization. Control methods are: control of the calibration intervals of measuringinstruments. The model is recommended as a model for use in medical organizations. The use of this model in the presenceof a target indicator (indicator) of the process of metrological control will ensure the necessary quality of metrological workin a medical organization within the framework of the internal quality control system.

Concept of a new PZT

1978 ◽  
Vol 48 ◽  
pp. 271-278
Author(s):  
Chr. Kühne
Keyword(s):  
Mirror System ◽  
Measuring Instruments

The PZT according to MARKOWITZ, undoubtedly one of the most accurate measuring instruments, has become an integral part of astronomy in the last years. Yet there are two reasons why I still tried to improve the MARKOWITZ basic idea.For the MARKOWITZ process the use of a lens objective is imperative. Because of the diameter limitations of the lens objectives the magnitude is reduced. Although a 65 cm PZT has been put into operation in Washington recently, the thermal difficulties encountered made it necessary to control the temperature actively. In addition, the 65 cm diameter of a lens equipped with 4 elements can be considered as the very limit, but not for a mirror system.In addition there are still more disadvantages using lens objectives. The useable field is restricted by astigmatism, reducing the range of declination. The transmission, especially in the blue wavelengths, decreases very rapidly with the thickness of lenses. For large multilens objectives the transmission is less than for a mirror system.

Summary and Conclusions of a Review of Prescription Drug Diversion Control Methods

1993 ◽  
Author(s):  
Constance Horgan ◽  
◽  
Jeffrey Prottas ◽  
Christopher Tompkins ◽  
Linda Wastila ◽  
...  
Keyword(s):  
Prescription Drug ◽  
Control Methods ◽  
Drug Diversion

Life Cycle Sustainability Assessment of Fugitive Dust Control Methods

2021 ◽  
Vol 147 (3) ◽  
pp. 04020181
Author(s):  
Alena J. Raymond ◽  
Alissa Kendall ◽  
Jason T. DeJong ◽  
Edward Kavazanjian ◽  
Miriam A. Woolley ◽  
...  
Keyword(s):  
Life Cycle ◽  
Sustainability Assessment ◽  
Dust Control ◽  
Life Cycle Sustainability Assessment ◽  
Control Methods ◽  
Fugitive Dust

Mathematical simulation of error functions of decision-making at tolerance control of measuring techniques availability

Metrologiya ◽  
2020 ◽  
pp. 3-15
Author(s):  
Rustam Z. Khayrullin ◽  
Alexey S. Kornev ◽  
Andrew A. Kostoglotov ◽  
Sergey V. Lazarenko
Keyword(s):  
Measurement Error ◽  
Geometric Interpretation ◽  
Measuring Instruments ◽  
Measured Quantity ◽  
Metrological Examination ◽  
Technical Documentation ◽  
Error Functions ◽  
Measuring Techniques ◽  
Tolerance Control ◽  
Laws Of Distribution

Analytical and computer models of false failure and undetected failure (error functions) were developed with tolerance control of the parameters of the components of the measuring technique. A geometric interpretation of the error functions as two-dimensional surfaces is given, which depend on the tolerance on the controlled parameter and the measurement error. The developed models are applicable both to theoretical laws of distribution, and to arbitrary laws of distribution of the measured quantity and measurement error. The results can be used in the development of metrological support of measuring equipment, the verification of measuring instruments, the metrological examination of technical documentation and the certification of measurement methods.

Method of estimation of hidden correlation of narrowband noise signals

2019 ◽  
pp. 34-39 ◽  
Author(s):  
E.I. Chernov ◽  
N.E. Sobolev ◽  
A.A. Bondarchuk ◽  
L.E. Aristarhova
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
New Technology ◽  
Digital Signal ◽  
Measuring Instruments ◽  
Central Frequency ◽  
Pearson Criterion ◽  
Useful Signal ◽  
Band Limited ◽  
Narrowband Noise

The concept of hidden correlation of noise signals is introduced. The existence of a hidden correlation between narrowband noise signals isolated simultaneously from broadband band-limited noise is theoretically proved. A method for estimating the latent correlation of narrowband noise signals has been developed and experimentally investigated. As a result of the experiment, where a time frag ent of band-limited noise, the basis of which is shot noise, is used as the studied signal, it is established: when applying the Pearson criterion, there is practically no correlation between the signal at the Central frequency and the sum of signals at mirror frequencies; when applying the proposed method for the analysis of the same signals, a strong hidden correlation is found. The proposed method is useful for researchers, engineers and metrologists engaged in digital signal processing, as well as developers of measuring instruments using a new technology for isolating a useful signal from noise – the method of mirror noise images.

Sign in / Sign up

Export Citation Format

Share Document