THE CALCULATION OF THE OPTIMUM OPTICAL PATH LENGTH FLOW CELL IN THE INFORMATION-MEASURING SYSTEM OF A GASOLINE SPECTROMETRIC RESEARCH 

Shcherbakova Anna Alekseevna, programmer, sub-department of instrument engineering, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: anutka7790@mail.ru
Polosin Vitalij Germanovich, doctor of technical sciences, professor, sub-department of medical cybernetics and informatics, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: polosin-vitalij@yandex.ru
Morozova Mariya Nikolaevna, electronics engineer, candidate of technical sciences, scientific and technical center – 2, NPP «Rubin» (2 Baidukova street, Penza, Russia), E-mail: anutka7790@mail.ru 

004.942 

10.21685/2307-5538-2019-3-2 

Background. The article presents the calculation of the optimal optical path length of the cell for commercial gasoline on the basis of spectral absorption coefficients of gasoline and its components in the near infrared region. The object of the study is an informationmeasuring system for the identification of components, determining the composition and detonation resistance of fuel. The subject of the study is the spectral characteristics of components and gasoline. The aim of the work is to determine the optimal length of the optical path of the flow system of information-measuring system based on the analysis of the absorption spectra of gasoline and its components.
Materials and methods. To solve the problems we used the methods of solving incorrect problems in spectral analysis, methods of mathematical modeling, statistical data processing, energy calculation method using the program OptiSystem, the calculation is carried out in the software environment Visual Basic for Applications (VBA) Microsoft Excel.
Results. A criterion for estimating and mathematical model of the length of the optical path of the cell are presented. The calculations determined the working range of the coefficients of transmission and error measurements.
Conclusions. The use of the proposed calculation of the optimal optical path length flow cell is the task of spectroscopy and consists in the study of the spectral composition of light radiation characterized by the function of the dependence of the energy density distribution over the spectrum on the frequency. The calculation allows to determine the losses introduced by the object under study (gasoline in the cuvette with the selected optical path length) in the optical path of the system. Information about the losses introduced by the cuvette with gasoline in dB is necessary to estimate the losses of the optical path of the system by the method of energy calculation and modeling using the OptiSystem software. 

gasoline, flow cell, optical path length of the cell, spectral absorption coefficient, information and measuring system