Method and apparatus for improving the reliability of an airflow

Details Method and apparatus for improving the reliability of an airflow Method and apparatus for improving the reliability of an airflow

1978-09-21

1980-04-08

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

041966228

ABSTRACT:
Undesired deposits accummulating on the surface of a temperature-varying airflow sensing resistor are burned off periodically by increasing the current through it. To eliminate errors caused by a reversal in the direction of airflow, a temperature independent resistor is placed downstream of the temperature-varying resistor and is maintained at the same operating temperature as the latter.

REFERENCES:
patent: 2726546 (1955-12-01), King, Jr.
patent: 3363462 (1968-01-01), Sabin
patent: 3464269 (1969-09-01), Froger
patent: 3577785 (1971-05-01), Guevrekian
Grant et al., "Fundamentals of Hot Wire Anemometry", in Symp. on Measurement in Unsteady Flow, 1962, pp. 44, 48 and 51.

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