Fluid handling – Processes – With control of flow by a condition or characteristic of a...
Patent
1988-03-30
1989-01-10
Cohan, Alan
Fluid handling
Processes
With control of flow by a condition or characteristic of a...
137487, 1374875, 13762411, 73262, 364510, G05D 700
Patent
active
047966513
ABSTRACT:
A method and apparatus for measuring gas flow volume in a system (of the kind in which the amount of gas flowing in a duct can vary in response to the variation of area of a variable area orifice in a duct and/or in response to changes in the total pressure of the gas upstream of the orifice) references the total pressure upstream of the orifice to the static pressure downstream of the orifice to produce a first signal representative of the differential pressure between the total pressure upstream of the orifice and the static pressure downstream of the orifice. The method and apparatus produce a second signal corresponding to the area of the opening in the orifice. The first and second signals are supplied to a gas flow volume database which is correlated to the sensors and to the orifice in the duct. The gas flow volume occurring in the duct at the first and second signals is read out from the database.
REFERENCES:
patent: 3719321 (1973-03-01), McNabney
patent: 4026321 (1977-05-01), Kahoe
patent: 4277832 (1981-07-01), Wong
patent: 4414950 (1983-11-01), Otsuka
patent: 4581707 (1986-04-01), Millar
Ginn LeRoy D.
Ginn LeRoyce S.
Schneider Karen B.
Cohan Alan
Feix Donald C.
Ginn LeRoy D.
Ginn LeRoyce S.
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