Hot film anemometer

Details Hot film anemometer Hot film anemometer

1988-10-03

1990-03-27

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Proportional

7320421, G01F 168

Patent

active

049110080

ABSTRACT:
An anemometer comprising: orifice plate adapted to be disposed within a flow stream, including an orifice; a thin film bridge, spaced from and disposed downstream of the orifice plate for directing the stream exiting the orifice in a direction perpendicular to the flow direction and for insulatingly suspending a plurality of resistive elements within a portion of the flow stream exiting the orifice. The plurality resistive elements comprising a first resistive element conformally shaped to the orifice, and a second resistive element substantially circumferentially disposed about the first resistive element, the second resistive element comprising a sense resistor having a resistance which changes with flow and a circuit formed in part by the plurality of resistive elements, forming a sensing network therewith for generating a signal indicative of the flow stream.

REFERENCES:
patent: 4083244 (1978-04-01), Agar et al.
patent: 4571996 (1986-02-01), Wakeman et al.
patent: 4637251 (1987-01-01), Carp

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