Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1997-01-30
1999-08-31
Dombroske, George
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
7386171, 7386175, G01F 128, G01F 100
Patent
active
059456086
ABSTRACT:
A fluid flow monitoring system comprised of a permanent magnet mounted on a bendable spring blade that provide an output from a Hall effect transducer as the permanent magnet is deflected toward or away from the transducer. The permanent magnet can be mounted to directly approach the Hall effect transducer or can also be mounted to approach the transducer by a sideways bypass direction. Both the direct motion and sideways bypass direction allows the use of a variety of sizes and shapes of magnets that allow the magnetic field intensity to be modified in any way desired. Various magnet shapes such as cylinders, rectangles, pyramids, triangles or compound magnets from these shapes may be used. The output signal of the transducer is processed through a smoothing filter and circuits that produce a linear output or a stepped digital output. The system preferably uses a resistance/capacitance filter to provide a different time constant for an increasing flow or a decreasing flow. The output can be used as a flow switching circuit or as a flow meter, or as a flow quantity totalizer.
REFERENCES:
patent: 3683691 (1972-08-01), Kivenson
patent: 4005604 (1977-02-01), Herzl
patent: 5021619 (1991-06-01), Hutchinson
patent: 5056373 (1991-10-01), Gray
patent: 5767419 (1998-06-01), Hutchinson
Dombroske George
Harwil Corporation
O'Reilly David
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