METHOD TO MEASURE QUANTITY OF DIELECTRIC LIQUID IN METAL RESERVOIR Russian patent published in 2015 - IPC G01F23/284 

FIELD: measurement equipment.

SUBSTANCE: method is proposed to measure quantity of dielectric substance in a metal reservoir, when in the first cycle of measurements they excite electromagnet oscillations serially in the fixed range of frequencies [f₁, f₂] in the reservoir and count the number N of excited types of oscillations. Additionally, in the second cycle of measurements, they excite electromagnet oscillations serially in the fixed range of frequencies [f₁, f₂] in the reservoir and count the number N of excited types of oscillations, according to the invention additionally, in the second cycle of measurements, they excite electromagnet oscillations serially in the fixed range of frequencies [f₃, f₄] in the cavity of the reservoir with a volume reduced by a fixed value ΔV in the area occupied by liquid, compared to the volume V₀ of the cavity during the first cycle of measurements, and count the number N₁ of excited oscillations, they perform joint functional conversion of N and N₁ according to the ratio , where As the reduced volume ΔV it is possible to use the volume of cavity of the metal waveguide, being an evanescent-mode waveguide for waves of the frequency range [f₃, f₄], open at one end and closed at the other, forming a part of the metal reservoir wall, end.

EFFECT: increased accuracy of measurement.

2 cl, 2 dwg