Direct-heated gas-flow measuring apparatus

Details Direct-heated gas-flow measuring apparatus Direct-heated gas-flow measuring apparatus

1985-05-02

1986-12-09

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

System

73204, G01F 168

Patent

active

046272798

ABSTRACT:
A direct-heated gas-flow measuring apparatus for a passage including a plurality of film resistors, disposed within the passage, for generating heat and measuring the temperature thereof, and a feedback control circuit for controlling the heat generated by the film resistors so that the temperature of each of the film resistors is a predetermined value. The feedback control circuit generates a plurality of output signals corresponding to voltages applied to the film resistors. A mean value for the plurality of output signals is calculated as the amount of gas-flow rate.

REFERENCES:
patent: 1902427 (1933-03-01), Sawyer
patent: 3979954 (1976-09-01), Ide et al.
patent: 4304130 (1981-12-01), Peter et al.
patent: 4317178 (1982-02-01), Head
patent: 4494406 (1985-01-01), Komons

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