Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1993-03-10
1994-07-05
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using differential pressure
G01F 142
Patent
active
053257278
ABSTRACT:
The method and apparatus of this invention is related to measuring a flow rate of a liquid having a density .rho. from a vessel having an inner cavity and a pouring channel. A flow sensor introduces a first gas flow into the liquid in the cavity at a first position, the inner cavity having a cross-sectional area A.sub.1 at the first position, and a second gas flow into the liquid in the pouring channel at a second position, the pouring channel having a cross-sectional area A.sub.2 at the second position, there being a vertical distance z between the first and second positions. A transducer provides an output signal proportional to a pressure differential p.sub.1 -p.sub.2 between the first and second gas flows. A processor receives the output signal and determines the liquid flow rate m through the pouring channel according to the proportional relation ##EQU1## where g is gravity.
REFERENCES:
patent: 4554687 (1985-11-01), Laryer et al.
patent: 5154513 (1992-10-01), Beer
Marketing Literature, Computer Instruments Corporation, 1000 Shames Drive, Westbury, NY 11590.
Frischmann Peter G.
Johnson Neil A.
Miller Steven A.
General Electric Company
Goldstein Herbert
Magee Jr. James
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