Measuring and testing – Volume or rate of flow – Of selected fluid mixture component
Patent
1991-07-09
1992-03-10
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Of selected fluid mixture component
73223, 73865, 119 1417, 364510, G01F 1128, A01J 700
Patent
active
050941127
ABSTRACT:
This specific density of the liquid/air mixture is measured at successive levels within the reception vessel for the liquid using a reference measurement (Io) representing the specific density of the degasified liquid within a reference measuring path. The ratio of each obtained density value measurement and the reference value is calculated for each measuring level and multiplied with the specific density of the liquid to allow an accurate measurement of the overall liquid volume or flow-rate. Preferably the reception vessel (1) has a respective measuring electrode (El..En) at each measuring level with a common counter electrode (Eo) coupled to an oscillator (4) via a constant voltage circuit (5) and a coupling capacitor (6). Each measuring electrode (El-En) is coupled via a multiplexer (7) and an active rectifier (9) to an A/D converter (10) coupled to a microprocessor (11) controlling a read-out display (12).
REFERENCES:
patent: 3075383 (1963-01-01), Favill et al.
patent: 4010643 (1977-03-01), Dekan
patent: 4452176 (1984-06-01), Hoefelmayr et al.
Hoefelmayr Tilman
Schulz Dieter
Biomelktechnik Hoefelmayr & Co.
Goldstein Herbert
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