Measuring and testing – Volume or rate of flow – System
Patent
1975-09-03
1977-02-01
Gill, James J.
Measuring and testing
Volume or rate of flow
System
G01F 186
Patent
active
040056031
ABSTRACT:
Apparatus for providing density compensation to measured volumes of fluid flow wherein means for sensing the fluid parameter having a dominant effect on the density thereof are adapted to produce an output signal which varies as a function of the magnitude of the sensed parameter. This output signal is supplied to a voltage-frequency converter which produces output pulses continually at a frequency corresponding to the magnitude of the output signal. The converter is gated to a coincidence gate for a period of predetermined duration upon detection of each unit change of volumetric fluid flow with the number of pulses accepted by the gate during such period reflecting the value of the dominant parameter and, hence density of the fluid. A frequency divider is configured to divide the gate output by a predetermined factor with each output pulse or count issued by the frequency divider representing a density corrected unit change of volumetric fluid flow. A display device is adapted to receive the output pulses or counts thereby enabling a visual display of the value of the density compensated volumetric fluid flow.
REFERENCES:
patent: 3566685 (1971-03-01), Zimmerman et al.
patent: 3839911 (1974-10-01), Zimmerman et al.
Golahny Yehuda
Johns Douglas A.
Airco, Inc.
Bopp Edmund W.
Gill James J.
Mathews H. Hume
Rae David L.
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