Open Access
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No 9 (2015)
STATE STANDARDS
3-6 209
Abstract
The structure of construction is examined and the basic metrological characteristics of the State primary special standard of electric current strength unit in the frequency range 20-1·106 Hz (GET 88-2014) are presented.
GENERAL PROBLEMS OF METROLOGY AND MEASUREMENT TECHNIQUES
6-10 145
Abstract
The problem of expanded uncertainty estimation at calibration of measuring instrument is considered. The two main sources of measurement uncertainty are revealed: the first one is associated with the reference value and the second one with the dispersion of measuring instrument indications. The dependence of coverage factor on a number of repeated indications and a ratio of the above two sources of uncertainties is obtained.
10-13 100
Abstract
Possibility of the exception is Shown from processing result conducted measurements of inaccuracy, in accordance with instability of the offset of the zero (the warm-up driftage) and with scatter of the factor of the issue in analog tract of the systems data acceptance, marketed on the base of the microcontroller.
НАНОМЕТРОЛОГИЯ
13-16 145
Abstract
The electron probe X-ray microanalysis method of measuring the thickness of oxide layer on silicon surface is proposed. The measurement range, lateral resolution and measurement errors of this method are estimated.
MEASUREMENTS IN INFORMATION TECHNOLOGIES
17-21 126
Abstract
The wireless sensor network with rectangular grating structure with from 20 to 260 number of clusters of smart sensors has been studies. The probability of non-failure operation, a cycle of survey duration have been estimated.
LINEAR AND ANGULAR MEASUREMENTS
21-24 205
Abstract
A simplified cross-calibration procedure used in a dynamic laser goniometer, when the angular displacement step of the studied angle sensor exceeds its discreteness are considered. It is shown that the methodical error of this procedure with M angular displacement steps of the angle sensor is determined by the total amplitude of M -harmonic and by multiples of harmonics of the dynamic laser goniometer systematic error. It is proved experimentally that when the angular displacement step of the angle sensor is less than 120° the methodical error does not exceed 0,01".
24-28 98
Abstract
The procedure of calculating errors of the liquid oxygen level-to-capacitance conversion are considered and the results of experimental study of its accuracy characteristics are shown. It is shown that the errors of basic and duplicate channels of such units do not exceed the required value.
OPTICOPHYSICAL MEASUREMENTS
29-33 188
Abstract
A family of AOTF-based spectrometers for various applications is presented. The classification according to their types, functions, and characteristics is carried out. The creation and application features of these spectrometers and specialized measuring systems are discussed.
TIME AND FREQUENCY MEASUREMENTS
34-37 126
Abstract
The method of radio frequency reference signal transmission by optical fiber line is represented. The scheme of electronic compensation of reference 100 MHz signal phase perturbations in optical fiber is described. The experimental results of measurements of Allan deviation of 100 MHz reference signal transmitted to the remote end of 100 km fiber line are presented.
MECHANICAL MEASUREMENTS
38-41 93
Abstract
The devices for coupling of shafts of rotary encoder and machines have been considered. The devices operate with higher accuracy then compensating couplers.
THERMOPHYSIC MEASUREMENTS
41-44 93
Abstract
The procedure of remote control of isotropic materials by the direct definition of heat conduction problem based on the solution of differential equation of heat conductivity with complex boundary conditions and solution of coefficient inverse heat conductivity problem for estimation of thermophysical parameters of materials are presented.
45-48 99
Abstract
The solution of a problem of accuracy increase for information and measuring systems of nondestructive control of thermophysical properties of materials is proposed. An algorithm of correction of technical imperfection of structural system components based on use of the created mathematical model of process of measurement and information on acting destabilizing factors is developed.
ELECTROMAGNETIC MEASUREMENTS
48-52 114
Abstract
The high-voltage subnanosecond field-forming system based on of TEM-cell with splitted potential electrode to provide the metrological assurance for high power fast rising electromagnetic pulse parameters measuring instruments has been developed and studied. This system was included into the structure of GET 148 standard facility. It provided the reproduction mode of electromagnetic pulses with amplitude up to 300 kV/m (800 A/m) at pulse edge duration no more than 100 ps.
52-57 136
Abstract
A filtration method with application of sequences of sliding local approximating models and functions of the weighed averaging is considered. The results of use of the developed method for filtration of signals observation of coordinates of vectors of geomagnetic field intensity are presented, and by means of statistical modeling, the errors of this offered filtration are calculated.
57-61 165
Abstract
The magnetometer zero drift is estimated by means of linear Kalman filter. An algorithm of magnetometer calibration with use of parameters characterizing the picosattellite rotary motion, is suggested.
RADIO MEASUREMENTS
61-65 92
Abstract
Presented a version of the original construction of the power standard of electromagnetic waves in coaxial transmission lines in the frequency range from 30 MHz to 67 GHz. It is shown that the reference power meters in coaxial transmission type allow to reproduce and transfer unit of power of electromagnetic oscillations with an accuracy required for testing the most accurate power meters.
65-68 98
Abstract
This article describe prognosticates possibility of panoramic measuring receiver, which have frequency utilization factor 1,55 and dynamic rand (for combinations channels of reception) exceed 100 dB without rebuild entrance filter.
MEDICAL AND BIOLOGICAL MEASUREMENTS
68-70 232
Abstract
The virtual device imitating the operation of non-invasive arterial pressure measuring instrument is developed on the base of LabView envirоnment. The advantages of the proposed solution are the new pulse wave signal processing algorithms, means of interaction with users and the loading capabilities for different types of signals registered by means of a special device.
PHYSICOCHEMICAL MEASUREMENTS
71-73 98
Abstract
The quantitative analysis of microstructure of two samples of deformable nickel superalloy with different mechanical properties with use of the developed composition and structure Ni-Co-Cr-Al-Ti-W-Mo-Nb system nickel alloy standard samples and the procedure of particle sizes and phases measurement in nanometer range was carried out. It has been shown that in the sample with the lower tensile strength limit the strengthening γ′-phase characteristics do not correspond with the reference alloy structure parameters.
