•  
  •  
 

Abstract

The article discusses the errors associated with the moisture measuring transducer that is based on the cylindrical electrode, along with their sources and calculation formulas for error elimination. The initial capacitance of the capacitive electrode humidity converter is dependent on its geometric parameters, such as the radii of the electrodes and their length. Accurate calculation of these geometric parameters enables the reduction of regular measurement errors in the input and switching circuit of the moisture converter to a minimum value, resulting in a significant increase in the informativeness and accuracy of the output signal. Consequently, some sources of measurement errors are eliminated or minimized during the design of the capacitive electrode moisture converter. To further reduce errors in the measurement chain and minimize the influence of internal and external destabilizing factors, there is a need to develop effective correction elements and schemes. Additionally, the article presents a method for calculating the total measurement error of the transducer by measuring the moisture content of scattered products with a capacitive electrode.

First Page

70

Last Page

75

References

  1. Arbuzov V. P. The use of time division of the channels in capacitive and inductive sensor measuring circuits. // Meas. Tech. 2007 (50), pp.752–757.
  2. Garchev A.B., Churakov P.P. Converter of parameters of non-contact capacitive sensors for conductivity measurements // News of the Samara Scientific Center of the Russian Academy of Sciences, 2016. Т.18. № 4(47). –С. 1363-1366.
  3. Djejora A.A. Electric capacitive converters and methods for their calculation. // Minsk «Bilaruskaya nauka». 2008.– 351 s.
  4. Ismatullayev P.R., Qodirov Sh.A, Jabborov X.Sh. O‘lchash vositalarining xatoliklari va ularning statistik xarakteristikalarini o‘rganish // “O‘z Standart” agentligi “Standart” jurnali 2011 yil № 2 17-22 б.
  5. Ismatullayev P.R., Nosirov T.Z., Jabborov X.Sh. Calculation of the capacity of the cone converter for the moisture meter of grain and grain products. // Magazine " Devices " International Scientific and Technical Society of Instrument Makers and Metrologists. - Russia. 2019. №4. С. 11-16.
  6. Qodirov Sh.A, Jabborov X.Sh.. Kichik kvadratlar usulida oʼlchash natijalarini qayta ishlash. // “ToshDTU xabarlari”. – Toshkent. 2018. №4. 22-28 б.
  7. Raxmanov А.T. Аnaliz pogreshnosti zondovыx mnogofunktsionalь¬nыx preobrazovateley parametrov dispersnыx sred. // Uzbekskiy fizicheskiy jurnal. - 2009. - №2. - С.153-156.
  8. Stolbovskiy A.B. Raschet pogreshnostey rezulьtatov izmereniy v tablichnыx protsessorax. - Yekaterinburg: Ural. un-ta, 2017. - 86 s.
  9. B. Javidi. Three-dimensional image fusion by use of multiwavelength digital holography. «Optics letters», 2005. 144–146
  10. A. Stadelmaier, J. H. Massig. Compensation of lens aberrations in digital holography. «Optics Letters», 2000. 1630–1632.
  11. T. Colomb. Automatic procedure for aberration compensation in digital holographic microscopy and applications to specimen shape compensation. «Applied Optics»,2006. 851–863.
  12. L. H. Ma. Numerical reconstruction of digital holograms for three-dimensional shape measurement. «Journal of Optics A», 2004. 396–400.
  13. J. Müller Characterization of spatial particle distributions in a spray-forming process using digital holography. «Measurement Science and Technology», 2004. 706–710.
  14. G. Situ, J. Zhang. Multiple-image encryption by wavelength multiplexing
  15. «Optics Letters», 2005. 1306-1308.

Download

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.