Method and apparatus for measuring fluid flow

Details Method and apparatus for measuring fluid flow Method and apparatus for measuring fluid flow

1984-07-12

1986-07-15

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

045998957

ABSTRACT:
An apparatus for the measurement of fluid flow through a conduit comprises at least one thermally sensitive element capable of producing a measurement value related to temperature located within the conduit. This element is exposed to the flow of fluid through the conduit. A second thermally sensitive element is capable of producing a reference value related to temperature of fluid ambient to the conduit. The reference value is substantially unaffected by heat generated by the second thermally sensitive element. An electrical circuit is provided for determining the measurement and reference values and for using the same to produce an indication which substantially eliminates errors due to changes in the ambient temperature and caused by velocity cooling of the first thermally sensitive element. This indication is representative of fluid flow through the conduit.

REFERENCES:
patent: 2859617 (1958-11-01), Adams
patent: 3800592 (1975-04-01), Jones, Jr.
patent: 3891391 (1975-06-01), Boone
patent: 3951113 (1976-04-01), Wessel et al.
patent: 4159638 (1979-07-01), Potter
patent: 4196622 (1980-04-01), Peter
patent: 4214478 (1980-07-01), Lauterbach
patent: 4280360 (1981-07-01), Kobayashi
patent: 4413514 (1983-11-01), Bowman
patent: 4494406 (1985-01-01), Komons et al.
Pollack "An Electronic Anemometer" in Electronics, 2/57 pp. 51-54.

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