METHOD OF MEASUREMENT OF MASS FLOW RATE OF LIQUID AND DRY ENVIRONMENTS Russian patent published in 2017 - IPC G01F1/66 G01P5/08 

FIELD: measurement technology.

SUBSTANCE: in particular, during the pipeline transporting petroleum products, liquified gases, chemicals, including chemically aggressive environments. A method for measuring mass flow rate of liquids is that a radio wave with a frequency ƒ₀ is routed through radio-transparent window in the pipe angled α to the direction of flow, the reflected waves are mixed with a portion of the incident wave and secreted Doppler signal of their difference x (t) with an average frequency . Additionally, part of the output radio waves with frequency ƒ₀ is routed through radio-transparent window in the pipe angled α to the direction of flow at a distance L in the axis of the first wave, the reflected waves are mixed with a portion of the incident wave and secreted Doppler signal of their difference y (t) with an average frequency , the mass flow rate is determined by the time of maximum mutual correlation functions of signals x (t) and y (t) and the frequency of their mutual maximum power spectrum density.

EFFECT: accuracy increase.

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