No 3 (2013)
FUNDAMENTAL PROBLEMS OF METROLOGY
3-6 77
Abstract
The paradoxes revealed by red shift models at construction of cosmological distances scale are considered.
GENERAL PROBLEMS OF METROLOGY AND MEASUREMENT TECHNIQUES
7-10 85
Abstract
The elements and structure of distributed wireless monitoring system for leaks detection in real time providing the safe and reliable operation of gas transmission network are considered.
11-12 73
Abstract
Conversion function of a wide-range measurement instrument with a limiting error band set by a trinominal formula is considered. Application of the complex (double) ratio method for conversion function factors determination is grounded.
НАНОМЕТРОЛОГИЯ
12-15 81
Abstract
The results of study of the contamination effect of in S-4800 SEM at electron energy 1 keV on the profile of relief elements of the MSHPS-2.0K measure are presented. It is shown that the electron irradiation leads to increase of the relief elements upper base subject to the electron irradiation dose at different irradiation modes.
LINEAR AND ANGULAR MEASUREMENTS
15-19 97
Abstract
The results of works on improvement of accuracy, manufacturability and informational reliability of digital angle converters are presented. Their structures and features of the sine-cosine angle sensors and the principles of data processing at self-calibration are given. Design and main specifications of angle sensors are described.
OPTICOPHYSICAL MEASUREMENTS
20-21 56
Abstract
The methods of Sun photometers calibration in the UV range are considered. The multiwave method of Sun photometers’ relative calibration implementing the two-wave operating principle is suggested. It is shown, that the multiplicative error in the suggested method could by fully removed.
MECHANICAL MEASUREMENTS
21-24 76
Abstract
It is proposed to introduce the use of a new class of test vibration signals – the virtual standards of defective bearings. The possible ways of such signals realization are described. A method of receiving the vibration test signal by recovery of time signal from three kinds of spectra. The results of mathematical modeling are presented.
24-28 115
Abstract
The magnetic flowmeterfor liquid sodium in which inductor represents an electromagnet creating a pulsed variable low-frequency magnetic field is described. As a result ofthe alternating magnetic fieldis completely excludedthe influence ofexternal noisepower frequency, significantly reducedthe influence ofthermo-emf, virtually eliminatedthe influenceof eddy currents, etc. The flowmeter design, its technical characteristics and checking technique are considered.
THERMOPHYSIC MEASUREMENTS
28-32 67
Abstract
Theoretically and experimentally investigated the influence of process heat transfer by conduction to the quality of thermal images obtained with the help of microbolometer matrices. The influence of the thermophysical properties of the matrix material on the function of the scattering lines defined by the optimal value of the ratio of these properties with the size of the pixel element. The analysis of the numerical values of the criteria for the detection and identification with the positions of the heat problem. Showing directions for further research, practical recommendations.
33-34 69
Abstract
The modified quasionedimensional model of mass transfer allowing to predict more accurately the functioning parameters of water heat supply pipeline network is suggested.
ELECTROMAGNETIC MEASUREMENTS
35-37 116
Abstract
The principles of the new state verification schedule (SVS) for means measuring inductance are considered. The standard consists of 2 parts: low frequency range up to 1 MHz and high frequency range – from 1 MHz up to 100 MHz. Limits of accuracy and instability are widened for working standards and their inductance value was expanded from 10 H to 10 kH as well. New detailed requirements for working standards metrology features in full frequency range from 40 Hz up to 1 MHz are presented. Main problems for succesful application of the new SVS are indicated.
37-40 88
Abstract
The basic electrical circuits and parameters of thin-film resistor voltage dividers manufactured according to thin-film technology are considered. The interconnection of coefficients of the division and the relationship and of their deviations is shown.
40-43 90
Abstract
The sensitivity and the initial offset of voltage between collectors of double-collector lateral bipolar npn -type magnetotransistor with the base formed in pocket serving as the third collector are investigated experimentally. It is shown that the voltage magnetosensitivity is 11 V/T in the circuit with the total drift of the base pocket and the initial offset of the voltage between collectors could be reduced to less than 1 mV.
ИЗМЕРЕНИЯ ИОНИЗИРУЮЩИХ ИЗЛУЧЕНИЙ
44-51 59
Abstract
The procedure of measurement of the induced activity in activation detectors of neutrons with use of gamma spectrometers with scintillation and semiconductor detectors is given. The dependenceof thesensitivityof gamma spectrometersthe γ-radiation energy in the range of 0,06–3 MeV ismeasured.
PHYSICOCHEMICAL MEASUREMENTS
51-55 73
Abstract
The problems of application of IK-analyzers for crude oil and oil products quality coefficients control are considered. The comparison of metrological characteristics of IK-analyzers and traditional measuring methods is carried out. The problems of IK-analyzers certification are considered and the ways of metrological assurance problem solution are suggested.
56-59 65
Abstract
It is shown that the metal properties strongly depend on the increased concentration of hydrogen as well as from its binding energies redistribution. According to the accidents statistics the hydrogen is the main cause of the metal constructions destruction at the occurrence of internal strains. The absence of the uniform metrology system of the hydrogen concentration measurement does not allow to widely implement an efficient and reliable method of process control and accidents prevention.
60-61 71
Abstract
The survey of D. I. Mendeleev VNIIM metrological opportunities at verification at test of the level meters is given. A number of problems connected with the measurements carried out in the terminals’ tank parks is designated. The 30-m laser interference comparator from composition of the State primary standard of length unit – metre is shortly described.
62-66 101
Abstract
The problems of metrological assurance of working oil viscosity converters on site of operation are considered. The verification method with use of mobile reference installation is suggested. On the base of comparative experimental data the alternative for the reference converter of viscosity is considered.
66-69 110
Abstract
The problems of metrological assurance of laboratory and on-line moisture meters are considered. The means of verification of their intrinsic error are presented: the certified reference materials, dynamic stands, and the standard moisture meters. The possibility of the use of verification installations based on laboratory moisture meters (Fisher method) is discussed.
70-73 80
Abstract
The basic trendsin reducing costs of the metrological assurance in oil-and-gas industryare outlined. One of them is connected with application of measuring instruments and measuring systems with the function of metrological self-check. The second one provides for application of the virtual measuring instruments and measuring systems.
ISSN 0368-1025 (Print)
ISSN 2949-5237 (Online)
ISSN 2949-5237 (Online)
