|Sensors and Systems Journal, No. 4, April 2005 (Contents and Abstracts)|
Mileykovsky Yu.S. Commercial accounting of thermal energy and heat carrier in Russia
The paper discusses key drawbacks of the existing commercial heat accounting system in Russia. It considers the requirements to instrumentation and offers an accounting system based on the readings of heat meters with guaranteed measurement performance as a basis for accounts with energy suppliers.
Velít I.D., Mikhailova Yu.V. On the measurement assurance of electromagnetic flowmeters
The methods of measurement assurance development for electromagnetic flowmeters on the basis of instrument simulation are considered. The capabilities, merits and drawbacks of simulation techniques for electromagnetic flowmeters study are discussed. The characteristics of a simulation unit for calibration and checking of foreign and domestic electromagnetic flowmeters are presented.
Burdunin M.N., Varghin A.A. The analysis of truncation error constituents in thermal energy measurements with heat meters
The paper examines the heat meter error constituents determined by the measurements of heat carrierís flowrate and temperature. The authors suggest to review and improve the guideline documents with the purpose to include the whole range of problems that arise in thermal energy measurement and to specify the requirements to instrumentation and measurement techniques more particularly.
Tonkonoghiy Yu., Pyadishyus A., Krukovsky P. Metrological stability of small diaphragm gas meters
The paper discusses the operation results of PREMAGAS and SCHLUMBERGER diaphragm gas meters from the metrological stability viewpoint.
Kargapolítsev V.P., Kosolapov A.V. Automatic calibration rigs: what should they be
The paper analyses the requirements to liquid flowmeter calibration rigs. With the example of the UPSZh 600 it shows that such rig is a sufficiently complex measuring system where a number of measurement assurance requirements should be met.
Anchishkin A.S., Gorokhov A.L., Demichev V.V., et al. Cascade-2P portable calibration rig
The paper describes Cascade-2P portable calibration rig intended for periodic and special checks of cold and hot water flowmeters with flow sections Dy15 and Dy20 mm both on-site and in accredited laboratories and centers.
Kasimov A.M., Mamedli E.M., Popov A.I., Chernyavsky L.T. Drastic improvement of components processing speed in aircraft backup controls
The paper discusses the opportunity of developing nonuniformly redundant aircraft control systems on the basis of electronic and jet technologies that ensure the resistance against external disturbances. It offers efficient techniques to increase the operation speed of jet elements that underlie the implementation of one of the control system channels.
Kazakov V.A. The methods of nonlinear element characteristics representation
The problems of mathematical description of nonlinear elements for electric circuit analysis and nonlinearity parameters measurement are discussed.
Tallerchik B.A. Posistor heaters with temperature autostabilization
Thermistors with positive temperature coefficient of resistance are called positors. The paper overviews a promising application of posistors as heating elements with temperature autostabilization. Posistor heaters (PH) demonstrate important advantages as against other types of heaters: cost-effectiveness, high reliability and longevity, and, especially, the capability of maintaining the desirable temperature without any special controllers. PH parameters, and performance attributes and applications for various systems temperature stabilization are presented.
Zatuliveter Yu.S. Prerequisites for the birth of a global control computer
Fundamental problems of global control computer are overviewed and methodological prerequisites of its development are studied. Generic trends of computer globalization of systems with controls are revealed. The concept of sociosystem as a global cyberobject for setting and solving interrelated control problems is introduced. Primary aspects of cyberenvironment as a background of global cybernetization of the sociosystem are analyzed. The integration of local-area networks and specialized sensor nets into worldwide distributed control networks as discerned as a universal development trend of cyberenvironment. Features and causes of the crisis in local tasks methodology and classical computer axiomatics are identified. The concept of global control tasks is defined and their paramount importance in sociosystem cybernetization is justified. The principles of switching from local control tasks to the global ones in the axiomatics of mathematically homogeneous cyberinformation field are offered.
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