Open Access
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No 5 (2015)
FUNDAMENTAL PROBLEMS OF METROLOGY
5-10 102
Abstract
The measuring problem of cosmological distances scale calibration on the red shift basis by the magnitude standard of supernovae SN Ia is considered.
GENERAL PROBLEMS OF METROLOGY AND MEASUREMENT TECHNIQUES
10-14 60
Abstract
The comparison procedure for the effectiveness of methods for discretization of the interval of values of a random variable at probability density estimation has been saggested. As an efficiency criterion the asymptotic expression of standard deviation of regression model of probability density has been used.
14-17 76
Abstract
The possibility of remote calibration works based on the measurements reduction theory with use of existing digital telecommunication networks is presented. This theory usage allows to optimize the measuring information processing algorithm with accurance of higher calibration results reliability in different calibration conditions. The example of this theory application for complex profile surfaces measuring instruments calibration at distance estimation of conformity has been considered.
НАНОМЕТРОЛОГИЯ
18-20 65
Abstract
The results of study of the process of obtaining nanoscale Ni-Ti films by the method of magnetron sputtering from two sources are presented. The dependence between the temperature coefficient of resistance of nanoscale Ni-Ti films and the ratio of currents densities of magnetron discharge has been established. The process of formation of nanoscale Ni-Ti films with a predetermined temperature coefficient of resistance is described.
LINEAR AND ANGULAR MEASUREMENTS
21-24 74
Abstract
A method of creation of modern linear displacement guide rails with deviation from linearity less than 15 nm on a 220 mm base length is presented. The development of a sensitive induction sensor with a measuring base of 220 mm, a height range of 100 mm and height deviation error 15 nm allowed to create a metrological instrument of the surface geometry measurement.
24-27 76
Abstract
A method of optimum spatial radiation frequency modulation assessment for 3D measurements based on phase triangulation and structured light is suggested. The algorithm of optimum spatial frequency determination of optical image formed on the surface of measured object is developed. The experimental control of the method is carried out.
28-32 114
Abstract
The application of Hamming codes with the possibility of single reading errors correction in digital angle converters based on the pseudo-random code scales is shown. An example of calculation and the converter functional diagram are presented.
OPTICOPHYSICAL MEASUREMENTS
33-36 70
Abstract
A method of the use of the synchrotron radiation primary standard source for high accuracy calibration of telescopes with high of telescopes with high angular resolution is described. The method is based on a highly accurate reproduction of spectral energetic characteristics, Gaussian distribution of the spectral density of energetic irradiance by the emitting area, stability and reproducibility of the characteristics of synchrotron radiation in one-electron mode.
37-40 63
Abstract
The сomposition of secondary standard of the unit of energy of laser radiation picosecond pulses is considered. The principle of secondary standard construction is presented and the solved problems are listed. The results of experimental studies of laser radiation short pulses are presented. The components of error of the standard are listed.
TIME AND FREQUENCY MEASUREMENTS
40-44 82
Abstract
A new algorithm of analytical time scale formation based on several temporal scales frequency measurements of atomic clocks signals is proposed. It is shown by means of computer modelling that the algorithm allows to get the group time scale with the frequency stability better than of the best standard of ensemble in appropriate range of measuring times intervals. The proposed algorithm is compared with Kalman-based time scale algorithm.
THERMOPHYSIC MEASUREMENTS
45-47 84
Abstract
The problem of measuring temperatures of printing unit electro and radio elements has been studied. The temperature sensor (thermocouple) and possible sources of error are considered. The method of systematic errors compensation for assurance of required accuracy of elements temperature measurement by means of temperature sensor is proposed.
48-52 83
Abstract
The analysis of accuracy of temperature measurement by infrared instruments with taking into account the errors of external parameters assignment has been carried out. The external parameters are the emissivity, air transmission factor, reflected radiation temperature, air temperature and the instrument error of determination of radiant temperature. The analysis was based on the energy balance on the radiation detector of infrared instrument.
ELECTROMAGNETIC MEASUREMENTS
52-56 170
Abstract
The design of axial 8-coil system based on Helmholtz coils allowing to create a magnetic field with inhomogeneity not more than 0,1 % at a distance of half of the radius of geometric center of the coils system is described The obtained results are confirmed by experimental studies.
56-60 85
Abstract
The multichannel nutational nuclear-resonance magnetometer for remote monitoring of induction and inhomogeneities of magnetic field inside and outside of charged particle accelerator - is considered.
RADIO MEASUREMENTS
61-63 78
Abstract
The results of estimation of influence of residual reflections in anechoic chamber on the accuracy of measurements of the user navigation hardware antennas parameters are presented.
MEDICAL AND BIOLOGICAL MEASUREMENTS
63-68 58
Abstract
The distribution functions of heart rate variability parameters most probable values ever groups of patients electrocardiograms registration are determined. It is shown in graphic and tabulated formats that they do not correspond to log-normal distribution function. The analysis of discrepancy is carried out, the reasons and the author interpretation of physiological mechanisms of regulation and control of patients heart rhythm are specified.
PHYSICOCHEMICAL MEASUREMENTS
68-71 66
Abstract
The problems of accuracy improvement for the non-destructive method of the solvents diffusion coefficient control in thin products made from capillary-porous materials by optimizing the introducing doses of the solvent during the experiment active part have been considered.
