HALL SENSOR BASED SYSTEM FOR MEASUREING WATER FLOW

  • TITLE: HALL SENSOR BASED SYSTEM FOR MEASUREING WATER FLOW
  • AUTHOR(S): I. Kandov, A. Alexandrov, G. Goranov
  • ABSTRACT: The measurement of the consumption of water is done with entirely mechanical systems that can be easily manipulated. Order to take account their indication is necessary compulsory attendance. A system for measuring water consumption, using a Hall sensor. The basis of the system is the possibility of remote sensing data, as well as more precise and led innovation measurement.
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DESIGN OF FREQUENCY MODULATOR WITH VARICAP

  • TITLE: DESIGN OF FREQUENCY MODULATOR WITH VARICAP
  • AUTHOR(S): B. Karapenev
  • ABSTRACT: This paper presents the features of frequency modulation and methods for the construction of the frequency modulators used in the radio-communication appliances widely. Based on the designed high-frequency LC oscillator is proposed and presented sequence for dimensioning of variant of the governing circuit with varicap which provides its transformation into a frequency modulator.
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SYNTHESIS OF THE SERVO SYSTEM WITH THE WAVE CHANNELS

  • TITLE: SYNTHESIS OF THE SERVO SYSTEM WITH THE WAVE CHANNELS
  • AUTHOR(S): A.N. Yusupbekov, Sh.M. Gulyamov, A.O. Ataullayev, V.Kh. Shamsutdinova
  • ABSTRACT: It is shown that, using results of the measurements "littered" with noise of linear combinations of variables of a condition of object, their estimates can be received, applying the filter consisting of "model" of initial system and a signal of feedback, proportional to a difference between the valid measurement and its assessment. Thus the law of optimum control is in result of minimization of the square functionality of quality of system average on ensemble. The system possessing that property is synthesized that in the absence of other indignations and noise of supervision continuous indignation is always compensated in such a way that the error of regulation or tracking is equal in the established state to zero that is reached due to integrating operation of the proportional and integrated and differential regulator. The method of calculation of management in watching system with wave channels, proceeding from the assumption is offered that the full vector of a state is known (it is restored on the basis of the known theorem of a separation), and also proceeding from replacement of the valid condition of system with the restored.
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ANALYSIS ON SOME METHODS FOR CONSTRUCTING OF WOMEN’S COAT – PRINCIPLES FOR DIMENSIONING

  • TITLE: ANALYSIS ON SOME METHODS FOR CONSTRUCTING OF WOMEN’S COAT – PRINCIPLES FOR DIMENSIONING
  • AUTHOR(S): S. P. Ilieva
  • ABSTRACT: This article presents a comparative analysis on four methods of constructing women’s coat. In Department "Industrial Design and Textile Engineering" was made dimensioning and drawing of lady’s coat according to any of the methods. The comparative analysis between the four methods is performed in various indicators. Firstly, the formulas for sizing coat according to the separate methods are researched in details. Then they are compared according to the dimensions obtained for different construction sections and lines. Here are presented the results of this analysis. We did a comparison also on the geometric drawing of coat, but this analysis is subject to a further publication.
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OPTIMIZE QUALITY INDICATORS OF YARN WORKED ON PSK-225 SPINNING MACHINE

  • TITLE: OPTIMIZE QUALITY INDICATORS OF YARN WORKED ON PSK-225 SPINNING MACHINE
  • AUTHOR(S): S. P. Ilieva
  • ABSTRACT: A preliminary study of the factors of influence upon the physical and mechanical characteristics of yarn produced on spinning machine PSK-225 is made. These are twist distribution along length, the influence of pressure in the spinning chambers, speed of air valve on the strength and variability of the finished yarn. Through the planned experiment is determined the effect of the pressure in the spinning and coupling chamber on the strength of the yarn. The regression equations for studied indicators are worked out.
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