Hall effect fluid flow switch and flow meter

Details Hall effect fluid flow switch and flow meter Hall effect fluid flow switch and flow meter

1996-10-22

1998-06-16

Biegel, Ronald L.

Measuring and testing

Volume or rate of flow

By measuring thrust or drag forces

7386175, H01H 3540

Patent

active

057674191

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 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: 3971253 (1976-07-01), Hini et al.
patent: 5002090 (1991-03-01), Ichikawa et al.
patent: 5021619 (1991-06-01), Hutchinson
patent: 5056373 (1991-10-01), Gray
patent: 5277195 (1994-01-01), Williams

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