Issue 185, article 2

DOI:https://doi.org/10.15407/kvt185.03.005

KVT, 2016, Issue 185, pp.5-20

UDC 004.021:004.94

MODELLING OF MULTI-COMPONENT SIGNALS IN A CHRONOPOTENTIOMETRY

Surovtsev I.V.

International Research and Training Center for Information Technologies and Systems of National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kiev, Ukraine

igorsur52@gmail.com

Introduction. In the inversion chronopotentiometry a differential reverse signal of inversion is considered as linear sum of components measuring that are located on the base curve of the lower envelope. The signal is similar to the spectrum of components after its subtracting and can be analyzed by the chromatographic methods or spectroscopic analysis.

The purpose of the article is to develop a method of modelling multi-component signals, provided that the spectra is spaced apart and the overlap of the spectral components is small.

Methods. Preliminary determination of the parameters of the approximation of the individual spectral components and the base curve is performed. An iterative model of the multi-component signal is sought in the form of generalized polynomial of linearly independent functions by least squares method. At a negative value approximation coefficient corresponding spectral component is considered to be erroneous or not.

Results. In the given example the use of the modelling method has allowed to reduce relative error in determining the concentration of copper from 18,9% to 1,5%, compared to the conventional analysis.

Conclusion. The proposed method of modelling and algorithms of its implementation allow eliminating the subjective factor that is associated with the experience and skills of chemist-analyst when selecting boundaries of turndown component that allows increasing the accuracy, repeatability and reliability of determining the concentration of chemical elements.

Keywords: modelling, algorithm, spectrum, chronopotentiometry.

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Reference

  1. ZakharovМ.S., Bakanov V.I., Pnev V.V. Сhronopotentiometry. М.: Chemistry, 1978, 199 p. (in Russian).
  2. Surovtsev I.V. Transformation of data structure in determining the concentration by methods of inversion chronopotentiometry. Kibernetika i vyčislitelʹnaâ tehnika, 2015, № 180, pp.4–14 (in Russian).
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  7. Surovtsev I.V., Tatarinov A.E., Galimov S.K. The modeling of the Differential Chronopotentiograms by the Sum of Normal Distributions. Control System and Computers, 2009, № 5, pp. 40–45 (in Russian).
  8. Lebedev А.Т. Comprehensive environmental mass spectrometry. ILM Publications, London, UK, 2012, 510 p.
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Received 14.06.2016

Issue 182, article 1

DOI:https://doi.org/10.15407/kvt182.02.004

Kibern. vyčisl. teh., 2015, Issue 182, pp.

Surovtsev I.V.

International Research and Training Center for Information Technologies and Systems of National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine

THE METHOD OF DIGITAL FILTERING OF ELECTROCHEMICAL SIGNALS IN THE CHRONOPOTENTIOMETRY

Introduction. It is important to use methods of digital filtration of signals, that do not distort the form of signal and use its internal characteristics, such as points of extrema for systems of measuring the concentration of toxic elements in chronopotentiometry.
The purpose of research is to create a method digital filtering by using extrema points for performing high-frequency treatment of different types of electrochemical signals while maintaining the shape of the useful signal which increases monotonically.
Methods. The method of digital filtering is based on using of the method of determining the spectrum of the analog signal by points of extrema.
Results. Created method of high-frequency filtration of electrochemical signals has reduced errors in determining the concentration, since it does not distort the form of the useful signal and does not lead to a blurring of the boundaries of the components of measurement of elements. The method is actively used in existing devices measuring the concentration toxic elements in the systems of dynamic axle-by-axle weighting of automobiles and continuous dosing, as well as in many other technical systems of measurement.
Conclusion. The proposed method of digital filtering has substantially universal character and can be used for preliminary digital processing of very different physical or chemical signals.
Keywords: digital filtering, extrema points of signal, chronopotentiometry.

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References

  1. Surovtsev I.V., Galimov S.K., Martynov I.A., Babak O.V., Galimova V.M. Device for measurement of concentration of toxic elements. Patent 107412 Ukraine, Int.C1. (2006) G01N 27/48, 2014 (in Ukrainian).
  2. Surovtsev I.V., Tatarinov A.E., Galimov S.K. The modeling of the Differential Chronopotentiograms by the Sum of Normal Distributions//Control System and Computers — 2009. — №. 5. — pp.40–45 (in Russian).
  3. Oppenheim A.V., Schafer R.W. Discrete-Time Signal Processing — NJ: Prentige-Hall, 1999. — 860 p.
  4. Fainzilberg L.S. Information technologies of signal processing complex form. Theory and practice — Kiev: Naukova dumka, 2008 — 333 p. (in Russian).
  5. Zadiraka V.K., Melnikova S.S. Digital signal processing — Kiev: Naukova dumka, 1993. — 294 p. (in Russian).
  6. Shelevitsky І.V., Shutko M.O., Shutko V.M., Kolganova O.O. Splines in digital data processing and signals — Kryvyy Rih: Vydavnychyy dim, 2008. — 232 p. (in Ukrainian).
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  8. Tsepkov G.V. Methods of data compression for quick spectrum and correlation transformations//Visnyk Shidnoukrains’kogo nacional’nogo universytetu im. V.Dalja — 2013. — № 15 (204). — pp. 222–229 (in Russian).
  9. Surovtsev I.V., Martynov I.A., Galimova V.M., Babak O.V. Device for measurement of concentration of heavy metals. Patent 96375 Ukraine, Int.C1. (2006) G01N 27/48, 2011 (in Ukrainian).
  10. Surovtsev I.V., Kopilevych V.A., Galimova V.M., Martynov I.A., Babak O.V. Analogdigital electro-chemical device for measurement of parameters of solutions. Patent 104062 Ukraine, Int.C1. (2006) G01N 27/48, 2013 (in Ukrainian).
  11. Surovtsev I.V., Babak O.V., Tatarinov O.E., Kryzhanovskyi Y.A. System for axle-by-axle weighing on platform scales. Patent 106013 Ukraine, Int.C1. (2006) G01G 19/02, 2014 (in Ukrainian).

Received 06.07.2015

ISSUE 180, article 1

DOI:https://doi.org/10.15407/kvt180.02.004

Kibern. vyčisl. teh., 2015, Issue 179, pp 4-14.

Surovtsev Igor V., PhD (Engineering), Senior Researcher of System Modeling Department of International Research and Training Center for Information Technologies and Systems of National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, av. Acad. Glushkova, 40, Kiev, 03187, Ukraine, e-mail: igorsur52@gmail.com

TRANSFORMATION OF DATA STRUCTURE IN DETERMINING THE CONCENTRATION BY METHODS OF INVERSION CHRONOPOTENTIOMETRY

Introduction. The complexity of direct measurement of the inversion time for the original signal in determining the concentration of toxic elements by inversion chronopotentiometry in the sample solution was not possible to determine its less than 0.1 mkg/ml.

Purpose. Necessary to create information technology of measurement the concentration of toxic elements in liquid tests of objects surrounding by methods of inversion chronopotentiometry, which let possibility essentially to increase sensitiveness and reliability in determent of the concentration.

Results. Using work out of information technology determining the concentration of toxic elements in liquid tests of inversion chronopotentiometry in apparatus the analyzer allow to increase until 14 elements, to increase sensitiveness until 0,0001 mkg/ml and to improve repetition of measurements the concentration.

Conclusion. Information technology has a universal character and can be applied for the analysis of signals of different nature, in which the values are monotonically increasing or decreasing.

Keywords: transformation of the data structure, methods of inversion chronopotentiometry, modeling, information technology.

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References

  1. Karnaukhov A.I., Grynevych V.V., Skobets E.M. Differential variant of inversion chronopotentiometry with a given resistance in oxidative circuit. Ukrainian chemical journal, 1973, no. 39, pp. 710–714 (in Ukrainian).
  2. Karnaukhov A.I., Galimova V.M., Galimov K.R. Theory inversion chronopotentiometry with a given resistance of circuit. Scientific Visnyk of NAU, 2000, no. 32, pp. 204–209 (in Ukrainian).
  3. Galimov K.R., Lavrynenko V.I., Serebryannikov J.L., Tsepkov G.V. The device for pretreating polarograms. Patent 1407241 USSR: Int.C1. G01N27/26, 1988 (in Russian).
  4. Vasilyev V.I. Induction and reduction in problems of extrapolation. Cybernetics and Computer Engineering, 1998, no. 116, pp. 65–81(in Russian).
  5. Vasilyev V.I., Surovtsev I.V. Practical aspects of the theory of reduction in problems of detection and modelling regularities. Control System and Computers, 2001, no. 1, pp.6–15 (in Russian).
  6. Surovtsev I.V., Galimova V.M., Babak O.V. Method for histogram digital filtration of chrono-potentiometric data. Patent 96367 Ukraine, Int.C1. (2006) G01N 27/48, 2011 (in Ukrainian).
  7. Surovtsev I.V., Tatarinov A.E., Galimov S.K. The modeling of the Differential Chronopotentiograms by the Sum of Normal Distributions. Control System and Computers, 2009, no. 5, pp.40–45 (in Russian).
  8. Surovtsev I.V., Martynov I.A., Galimova V.M., Babak O.V. Device for measurement of concentration of heavy metals. Patent 96375 Ukraine, Int.C1. (2006) G01N 27/48, 2011 (in Ukrainian).
  9. Surovtsev I.V., Kopilevych V.A., Galimova V.M., Martynov I.A., Babak O.V. Analog-digital electro-chemical device for measurement of parameters of solutions. Patent 104062 Ukraine, Int.C1. (2006) G01N 27/48, 2013 (in Ukrainian).
  10. Surovtsev I.V., Galimov S.K., Martynov I.A., Babak O.V., Galimova V.M. Device for measurement of concentration of toxic elements. Patent 107412 Ukraine, Int.C1. (2006) G01N 27/48, 2014 (in Ukrainian).
  11. Surovtsev I.V., Babak O.V., Tatarinov O.E., Kryzhanovskyi Y.A. System for axle-by-axle weighing on platform scales. Patent 106013 Ukraine, Int.C1. (2006) G01G 19/02, 2014 (in Ukrainian).

Received 03.03.2015