Fan type mass airflow meter

Details Fan type mass airflow meter Fan type mass airflow meter

1980-06-09

1982-06-01

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using turbine

G01F 178

Patent

active

043321739

ABSTRACT:
A fan in a duct driven by a permanent magnet D.C. motor powered by a constant voltage source varies in speed according to the airflow through the duct. The current drawn by the motor is a direct function of the air speed and the density. The motor current is measured to provide a measure of mass airflow.

REFERENCES:
patent: 2591478 (1952-04-01), Turner, Jr.
patent: 2614417 (1952-10-01), Cockrell et al.
patent: 3037383 (1962-06-01), Ziniuk et al.
patent: 3044294 (1962-07-01), Wilhelm
patent: 3353406 (1967-11-01), Moss
patent: 3360989 (1968-01-01), Herrington
patent: 3364741 (1968-01-01), Hickox
patent: 3440877 (1969-04-01), Kovats

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