ЭКСПЕРИМЕНТАЛЬНАЯ ПРОВЕРКА АДЕКВАТНОСТИ МАТЕМАТИЧЕСКОЙ МОДЕЛИ ИНЕРЦИОННОГО РАСХОДОМЕРА

Abstract

The article describes the check of mathematical model (MM) of the inertia-based method to measure flow and density of liquids or gases for appropriateness. The article proves the relevance of flow measuring in modern industry, as well as the necessity for creation of the new measuring instrument – inertia-based flowmeter (IF). The block diagram of IF and the description of direct and inverse transformations of values in the flowmeter are provided in the paper. The appropriateness of mathematical model in direct transformation is estimated by the criteria of consistency between natural and modeled signals’ behavior, in inverse transformation by the criteria of relative error of measuring results of the flowmeter. The article also describes the MM being checked, as well as the pilot machine being used for conducting natural experiments. The results of natural and numerical experiments are given. The comparison of forms between modeled signals and natural ones obtained from the primary measuring transducers, pressure difference sensors, is performed. The values of density and mass flow rate are obtained in according to formulas of MM under consideration. The graphs of measuring results of mass flow rate and density when the flow rate changes are provided. The experimental data obtained indicate to the correct description of the working process by first approach. Nevertheless, some inaccuracies and imperfections of the model under consideration were found which need for further exploration.