METHOD OF MEASURING ELECTRIC CAPACITY Russian patent published in 2018 - IPC G01R27/26 G01R17/00 

FIELD: test and measurement equipment.

SUBSTANCE: invention relates to instrumentation and can be used to measure capacitance of capacitors and capacitor sensors of various process parameters (level, pressure, displacement and so on). Method of electrical capacity measurement is based on recording charge t₁ time of measured capacitor from moment it is applied to it through resistor R of constant voltage E until it reaches measured capacitor C_x previously accepted threshold voltage value U₀. By replacing measured capacitor C_x reference capacitor C_o with known capacity, Charge time of sample capacitor t₂ is measured, without changing resistor value R, charging source E voltage and previously received voltage threshold value U₀ on capacitor. Measured capacitance is calculated by formula: where C_o - capacitance of sample capacitor; t₁ - charge time of capacitor with measurable capacitance C_x to previously accepted threshold voltage value on its plates; t₂ - charge time of capacitor C_o to previously accepted threshold voltage value on its plates.

EFFECT: technical result consists in increasing measurement accuracy of electrical capacity.

1 cl, 1 tbl, 3 dwg