Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1976-09-10
1978-04-04
Tokar, M.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
204195R, G01N 2742
Patent
active
040829944
ABSTRACT:
The relative amounts of liquid phase versus vapor phase of a mixed phase resistively conductive fluid, such as boiling water, is determined by an indirect measurement of admittance between a poled pair of electrodes within a cross section of a flow path in the fluid comprising part of an electrical circuit by providing an oscillating power source therein with an alternating voltage on the order of 1-30 kilohertz across the electrode pair generating a voltage drop across a load resistance in the loop which electric parameter varies as a function of admittance in the fluid between electrodes--as affected by liquid void fractions therein, the voltage drop signal so produced being divided by a similar voltage drop which varies as a function of admittance of liquid from the same fluid to determine liquid fraction (and by subtraction from unity, vapor fraction), with compensation for conductivity change, the measuring process further including the isolation of reactive and resistive cross conduction outside the measurement loop.
REFERENCES:
patent: 2004569 (1935-06-01), Davis, Jr.
patent: 2760922 (1956-08-01), Williams, Jr.
patent: 3040245 (1962-06-01), Brizzolara
patent: 3368144 (1968-02-01), Gerdes
Auburn International, Inc.
Cohen Jerry
Tokar M.
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