Measuring and testing – Volume or rate of flow – Weir type
Patent
1992-02-25
1995-11-21
Chilcot, Richard
Measuring and testing
Volume or rate of flow
Weir type
73198, 73861, 7320418, 73227, 364510, G01F 700
Patent
active
054676509
ABSTRACT:
A flowmeter for measuring the volumetric discharge in an open channel makes two measurements: (1) velocity at a fixed point, and (2) fluid level. A level-discharge function which is a function of level alone is then generated in response to the measured level, and the discharge function and velocity measurement are multiplied to obtain the volumetric discharge. For more accuracy, in a conduit through which fluid is flowing, a single velocity measurement at a point has a value v.sub.s, from which is inferred the effects of velocity profile in the conduit. A flowmeter in a second embodiment makes use of this such that a level-velocity-discharge function directly produces the volumetric discharge, using inputs from the velocity and level signals. In a third embodiment, when the conduit is full, the level measurement is dispensed with, and a velocity-discharge function directly produces the volumetric discharge, using input from the velocity sensor.
REFERENCES:
patent: 3220225 (1965-11-01), Scranton et al.
patent: 3363462 (1968-01-01), Sabin
patent: 3996798 (1976-12-01), Vander Heyden
patent: 4083246 (1978-04-01), Marsh
patent: 4397191 (1983-08-01), Forden
patent: 4437339 (1984-03-01), Drews et al.
patent: 4467644 (1984-08-01), Palmer
patent: 4480466 (1984-11-01), Gates
Artis Jewel V.
Chilcot Richard
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