Measuring and testing – Volume or rate of flow – By measuring thrust or drag forces
Patent
1983-06-30
1985-04-30
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring thrust or drag forces
G01F 128
Patent
active
045136254
ABSTRACT:
The instrument disclosed herein is designed for measuring flow rates and densities of moving fluid streams, including liquids, gases, slurries, and fluids which contain solid materials. Basic components of this instrument are a dynamic leg and a static leg, and flexible connections in each leg which allow for displacement caused by the force of the moving fluid. Each leg is defined by a conduit member having several bends therein, which are joined by straight sections. The legs are held in physical contact along one of the straight sections, and a displacement transducer unit is installed at this point. In operation, part of the incoming fluid to be measured for flow rate fills the static leg and remains in this leg. After the static leg is full, all of the incoming fluid moves through the dynamic leg, and fluid pressure is in equilibrium within the system. This removes the effect of fluid pressure on the flow rate and density measurement, so that the displacement transducer senses and records only the force generated by the moving fluids. Flow rate is then calculated as a function of this force. A separate transducer measures the velocity of the stream, and this measurement is converted to a density value.
REFERENCES:
patent: 2804771 (1957-09-01), Brown
patent: 3096646 (1963-07-01), Peirce
patent: 3584508 (1971-06-01), Shiba
Campman Keith S.
Ernst William B.
Goldstein Herbert
The Dow Chemical Company
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