Термооптичний метод і засіб вимірювального контролю компонентів скрапленого нафтового газу

Abstract

The thesis presents the research results to increase the probability of mass fractions measuring control of LPG components, which has various temperatures by defining the density of the liquid phase. The thermo-optical method for measuring control of mass fractions of LPG components is presented in the paper; it is based on the differences in temperature dependences of the refractive index, and thus the densities of the LPG components, the results of the measurement are numerical values of the refractive index and therefore the density of the liquid phase of LPG at several different temperatures, allowing to estimate the mass fractions of LPG components and increase the probability of control by 10% with the help of a priori known values of density of LPG components at these temperatures. The measuring conversion function of the refractive index of LPG was improved based on the proposed method, thus reducing consolidated measurement error by 1.2 times, its investigation was conducted. Based on research conducted it was developed the device of optoelectronic mass fraction measuring of LPG components, its mathematical model allows to determine the mass fractions of LPG components and increase the probability of control to the level of 0.97. The estimation of static metrological characteristics of control device measuring channel for the LPG components mass fractions. The control device basic errors are defined as well. Distribution law compositions were defined for selected random error components based on which probability indicators of mass particle measuring control of LPG components were estimated. It was defined that the probability of right decision result is 0,97, which is 0.1 bigger than that of the known devices.