Sensors and Systems Journal, No. 12, December 2011 (Contents and Abstracts)
I. A., Afanas’ev A. V.,
Technique of active-passive infrared radiometry for measurement of physical surface temperature was described. Developed infrared radiometer based of the active-passive radiometry technique was described. Shown that this proposed technique allows to reduce the measurement errors which are caused by uncontrolled changes of object emissivity.
Keywords: radiometer, pyrometer, active-passive location, emission.
Melnikov V. I. The acoustic impedance waveguide level meter and signaling devices for liquid
The action principle of acoustic impedance waveguide meter and signaling devices for measuring of liquids level was shown. The construction of waveguide sensitive the elements of based longitudinal, bending and torsional normal waves were description. The basic technical and constructive characteristics of acoustic impedance level meter of based longitudinal the waves and the signaling devices for control of level liquid were given.
Keywords: level meter, signaling devices for liquid acoustic waveguide, piezoelectric transducer.
M. Yu., Bosov S. I.,
In this paper the principle of the ultrasensitive accelerometer based on surface acoustic waves based on the effect of distortion of electric field, accompanying surface waves, metallic membrane which is above the surface piezoelectric acoustic line was described. Numerical analysis of the main accelerometer features is presented.
Keywords: acoustoelectronics, sensor, surface acoustic waves, accelerometer, piezocrystal.
Shkelev E. I Zemnyukov., N. E. Data processing system for vibrodiagnostics of moving objects
We consider a system of digital time-frequency signal s(t) processing from mobile sources under the mechanical action of internal or external origin. It is described a method of processing, based on mutual transformation of the Wigner-Ville with a reference signal, whose structure follows the structure of the radiated (or reradiated) signal s(t). The functional structure of processing systems and software for its implementation are presented, taking into account the possibility of working in real time. It is shown that the proposed system of data processing can significantly improve the accuracy of measurements of small-scale mobile objects movement’s parameters as through an active remote sensing, and on the signals from the object.
Keywords: spectral-temporal analysis, digital signal processing, mobile objects, control of movement’s parameters, remote sensing.
Vavilov V. D. Protection microseisms instrument remedies for vibratory and striking load
Question vibration microseisms of the instrument facilities is considered in article on example three-dementional-go block, installed on shock absorber housed. Mathematical system model vibrо-protection is Received in the manner of transmission function of the sixth order and her realization in the manner of computer program.
Keywords: microseism, vibration, shock absorbers, point of the resonance, decline ACHH.
Gurbatov S. N., Klemina A. V., Demin I. Yu., Klemin V. A. Acoustic no-reagent analyzer “BIOM” for Acoustic for clinical - diagnostic laboratories
Acoustic analyzer "BIOM"
which allows to spend blood tests of the person and to receive results of
the general analysis of blood, to define albuminous
fractions of whey of blood and spectrum of l
Keywords: acoustic analyzer, blood.
The object of the present study is a numerical analysis of the spectral and bispectral functions of the intense random signals propagating in nondispersive nonlinear media. LabVIEW environment is extremely simple in use, and provides good results as compared to traditional programming techniques. For example, internal libraries make it easy to take direct and inverse Fourier transform, as well as regular and random signals. The possibility of recovering the input spectrum from the measured spectrum and bispectrum at the output of the nonlinear medium is discusses.
Keywords: Burgers equation, virtual instrument in LabVIEW, spectral and bispectral analysis.
Belkov I. G., Malyshev I. N., Nikulin S. M. Using neural networks to create models of passive electronic components
The new approach of building passive components parametric models using neural networks is proposed in this article. The main types of neural networks are best suited for multivariate approximation problems. Given the necessary ways and means to solve the problems of constructing a parametric model of passive components. Given the necessary ways and means to solve the problems of constructing a parametric model of passive components. The high efficiency of this approach is obtained.
Keywords: Neural networks, parametric model, electronic components, computer-aided design.
Pikhtelev A. I., Pikhtelev N. A. Investigation of processes in frequency stabilizing system of rubidium frequency standard in the presence of nonlinearity nearby atomic resonance
The processes in electronic automatic frequency control system of rubidium frequency standard are investigated in this article. The equations, which allowed to describe processes in the real frequency stabilizing system taking into account the nonlinearity of this system in area of small detunes, are deduced. This equations are allowed to realize simulation of frequency stabilizing system. The results of simulation and analysis of frequency stabilizing system are placed in this article. The influence of frequency stabilizing system on mistakes of rubidium frequency standard are estimated.
Keywords: rubidium frequency standard, automatic frequency control system, discriminating characteristic, nonlinearity of discriminating characteristic, residual frequency detunes, frequency mistake, control coefficient
Kukushkin A. V., Zotov A. V. Radio-surveillance systems based on pseudo-surface electromagnetic waves on the spherical surface of the earth (sea)
General analysis of history and methodology of theory for wave propagation on the Earth surface is presented. Inconsistency, from the point of view of electrodynamics, of a local approximation of the spherical earth as a plane is shown. A boundary-value problem for an open spherical waveguide pseudo-surface waves is formulated and solved. These waves’ field amplitude maximum and the corresponding Poynting vector components maximums are shown to be directed away from the Earth surface rather than towards it as is necessary for the surface wave theory. In this connection, it is noted that the generation of such waves by land-based antennas seems impractical; and it is suggested that the fact that the underground or underwater part of fields of such waves, quite the opposite, is always directed towards the concave spherical surface, should be used for creation of shore-based radio-surveillance systems for monitoring the sea surface beyond the horizon.
Keywords: radio-surveillance systems, an open spherical waveguide, surface waves, leaky waves, pseudo-surface wave, Zenneck wave, Sommerfeld wave.
Tyugin D. Yu., Kurkina O. Ye., Kurkin A. A. The digital atlas of cinematic and non-linear parameters of internal gravity waves in the World ocean
The software digital oceanography atlas is described in this paper. This product consists of a set of oceanographic data calculated using international hydrology sources (GDEM and WOA) and a software for the data set visualization, extracting and access. The atlas is a very useful tool for express-estimations of limit parameters of internal gravity waves in any area in the World ocean and also for preprocessing of input data for numerical models. Description of user interface, existing functionality and main working modes of the software are presented.
Keywords: data visualization, data access tools, digital atlas, software developing.
Abashin A. E., Bolshakov O. S., Vdovin V. F., et al. Cold-electron bolometers: high-performance sensors for detecting extremely small THz signals.
The features of development receiving complexes of THz and submillimeter ranges are considered. The possible designs of detectors are described. The advantages of cold-electron bolometers are considered. A series of measurements on the detectors is lead; description of the equipment necessary to conduct experiments is given.
Keywords: bolometer, detector, cryogenic equipment, receiver, thermal noise, cryorefrigerator, radio astronomy, space missions, immersion lenses.
Eremeev Yu. V., Nikulin S. M., Hilov V. P. The measurement converter for analysis electromagnetic characteristics of the tested object in the millimeter and submillimeter range
The development methods of waveguide measurement converter is considered in the article. The numerical analysis results for the structural elements frequency characteristics are presented. The prospects of a relatively cheap measurement instruments design in the millimeter and submillimeter range are discussed.
Keywords: measurement converter, reflectometer, rectangular waveguide, polyimide film, network analyzer.
Nikulin S. M., Belova Y. V. Measurement and identification of large signal nonlinear microwave circuit S-parameters
The article considers mathematical simulation of nonlinear microwave circuits using large signal S-parameters as analytic functions of frequency, the incident wave amplitude and the load impedance. The authors solve the problem of the model parameters measuring and identification using the method of spatially remote load and the frequency window method. The article discusses the prospects of computer-aided design, based on identification of large signal S-parameters by means of harmonic balance and linear analysis of nonlinear microwave circuits.
Keywords: nonlinear circuit, large signal S-parameters, measurement, identification, computer-aided design, spatially remote load, vector network analyzer.
Baranov A. V., Morugin C. L. Ratio of harmonic powers of the E class key devices
Relations of harmonic energies for the generalized devices of class Е (amplifiers and generators) with the key element which active resistance changes from zero in the included condition to infinity in the switched off condition are received. As it is established in the generalized operating modes of key devices, including dual, generation and transformation of the higher harmonics in keys is a necessary condition to reach in them efficiency which aspires to 100 % when lost energy in a key is minimized. The relations similar to relations of Menli-Rowe, are carried out not only in a chain with jet nonlinearity, but also in the chains of keys working in modes without energy lost on a key.
Keywords: capacities of harmonics, Manley-Rowe relations, key amplifiers, amplifiers of class Е, key modes.
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