No 9 (2012)
STATE STANDARDS
3- 7 103
Abstract
The composition and the results of studies of modernized state standard designed for reproduction and transmission of the electric field strength unit to secondary standards and working measuring instruments is described.
GENERAL PROBLEMS OF METROLOGY AND MEASUREMENT TECHNIQUES
7- 11 161
Abstract
The conditions at which is possible the practical application of expectation characteristics and of variance for estimation of results of measurements of two normally distributed random quantities ratio are considered. The calculated ratios are presented and a good agreement with the simulation results at small relative errors of measurement of ratio denominator is shown.
11- 15 93
Abstract
The basis functions system requirements allowing to provide the time division of channels in sensors measuring circuits are formulated. In accordance with this requirements basis functions systems of channels time division were developed.
НАНОМЕТРОЛОГИЯ
15- 18 75
Abstract
The possibility of employment of InP (001) diffraction grating created by laser photo-induced etching and monoatomic steps on highly oriented pyrolytic graphite as reference samples for scanning near-field optical microscope in shear-force mode has been demonstrated.
19- 21 89
Abstract
The procedure of measurement of parameters of the polished surface roughness in nanometer range by means of Linnik interference microscope with automatic decoding of interference patterns by phase steps method is considered.
LINEAR AND ANGULAR MEASUREMENTS
22- 25 79
Abstract
The methods and tools for construction of absolute angle new generation, encoders builded on modern components are presented. The instruments collimation and reflex schemes are described with the analysis of their basic properties. The computational algorithms for information processing and the instruments errors estimations are presented and the results of instruments prototypes metrological characteristics laboratory tests are shown.
ИЗМЕРЕНИЯ МАССЫ
26- 30 85
Abstract
It is offered for crude oil hydrometers to determine the error of measurements of the volume content of water in crude oil as a sum of additive, multiplicate and nonlinearerrors. And instead of the step assignment of limits of relative error of measurements of crude oil net weight in accordance with GOST Р 8.615 to set thenet weight functional dependence in the form of a polynom with known factors.
THERMOPHYSIC MEASUREMENTS
30- 34 87
Abstract
In general, set the boundary value problem of heat conduction for multilayer systems (planar, cylindrical and spherical shape) to the external surface of which affect the boundary conditions of the third kind. A solution of the problem at the stage of regular thermal regime of the first kind. Shows the general approach of decision theory, Sturm–Liouville problems for multilayer systems in developing methods for measuring thermal properties.
34- 37 92
Abstract
The study of behavior of entropy generation and the force/flow interrelations for thermal non-stationary problem аt absence of a gradient of temperature is carried out. The breach of linearity of dependence between the force and corresponding flow at preservation of bilinear of entropy generation rate from force and flow is revealed. The conditions at which this linearity is retained are found.
38- 42 90
Abstract
The new model of intellectual measuring information systemfor determining thermophysical properties of materials andproducts determination is proposed. The difference from existing systemsincludes the accurate measurement of parameters under determination by means of the original circuit realization of system algorithm based on the created measurementmethod,intellectual measuring probe, a knowledge base for the subject under consideration field, and a software.
43- 45 67
Abstract
The estimation of errors of semitransparent materials’ thermophysical properties’ pulse method determination by comparison of the results of numerical solution of the sample nonstationary temperature field with surface exposed by collimated laser pulse of finite duration and the true volues of temperature conductivity, heat conductivity, and specific heat capacity is carried out.
45-49 75
Abstract
The analytical estimations of standard and differential methods of indirect measurements of heat carrier medium consumption difference are presented. The areas of preferable application of each method are limited.
49- 50 116
Abstract
The experimental research results of basalt thermal treatment with the microwave electromagnetic energy application are presented. The numerical results as well as a diagram of basalt temperature change are presented. It is shown that microwave treatment has a number of advantages over the traditional ways of basalt melting with the use of burnable fuel.
ELECTROMAGNETIC MEASUREMENTS
51- 54 63
Abstract
The method of direct determination of parameters of multielement RLC -dipole based on power supply of the measuring scheme (MS) by voltage pulses changing according to n -degree of time law function, n -fold differentiation of signals at the input and output of MS and on calculation of generalized parameters of its transmission function through the relationships of signals from each differentiation channel is suggested.
54- 58 101
Abstract
The possibilities of measurements by magnetic modulation converter in dynamic chaos regime are considered. The converter construction principle is discussed.
58- 60 90
Abstract
It is shown that A and K indices of geomagnetic activity determined by magnetic observatories during the periods of quiet and slightly perturbed Earth magnetic field could be distorted due to magnetic noise from technogenic sources. The examples of such distortions are demonstrated.
RADIO MEASUREMENTS
61- 63 128
Abstract
The design features of radio interference digital measuring instruments with peak and quasi-peak detectors are discussed. The detectors’ block diagrams are presented with errors estimation.
64- 65 80
Abstract
The method of automatic phase radio direction finders’signals processing allowing to form the azimuth mark by means of distuningby switching frequency the antenna system dipoles is proposed.
PHYSICOCHEMICAL MEASUREMENTS
66- 69 90
Abstract
The studies to estimate the characteristics of uncertainty of results of moisture content in grain and cereals measurement according to ISO 712-2009 with GET 173-2008 were carried out. We demonstrated that the methods of air heat drying and vacuum heat drying according to ISO 712-2009 allow to obtain comparable results and characteristics of their uncertainty. By means of the methods of mass spectrometry and IR spectroscopy is established that at using methods according to ISO 712-2009 no thermal destruction of grain which from the water molecules were extracted is observed.
69- 75 65
Abstract
By combination of IR-Fourier spectroscopy of reflection, resistometry and gravimetry were controlled the properties of nanostructured metal-oxide coating received by reactive sputtering in vacuum and subsequent low temperature oxidation in air atmosphere at 50°С. It allows to get the composition and thickness controllable metal-oxide coatings with functional properties impotant for practical application.
ISSN 0368-1025 (Print)
ISSN 2949-5237 (Online)
ISSN 2949-5237 (Online)
