Measuring and testing – Volume or rate of flow – System
Patent
1976-03-19
1977-03-08
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
System
73 32R, G01F 132
Patent
active
040106454
ABSTRACT:
A system for measuring the mass flow of a fluid stream wherein gas is interspersed with liquid, the system providing separate mass flow readings for the gas and liquid. The system includes a mass flow vortex-type meter having a flow tube through which the stream is conducted, the meter producing an output signal whose frequency is indicative of volumetric flow and whose amplitude is indicative of mass flow. This output signal is routed either to a liquid-mass flow indicator or to a gas-mass flow indicator by a switch responsive to a density signal whose magnitude depends on the density of the fluid passing through the meter, such that when the stream is in liquid form the output signal is applied to the liquid indicator, and when in gas form to the gas indicator. The density signal is generated by a detector that in one channel converts the meter output signal to a first analog voltage representing volumetric flow and in a second channel to a second analog voltage representing mass flow, the second voltage being divided by the first to produce a third analog voltage constituting the density signal.
REFERENCES:
patent: 1935445 (1973-11-01), Heinz
patent: 3370463 (1968-02-01), Chanaud
patent: 3488996 (1970-01-01), Pfrehm
patent: 3719073 (1973-03-01), Mahon
patent: 3776033 (1973-12-01), Herzl
patent: 3885432 (1975-05-01), Herzl
patent: 3888120 (1975-06-01), Burgess
patent: 3906198 (1975-09-01), November
Fischer & Porter Co.
Goldstein Herbert
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