Ambient temperature compensated double bridge anemometer

Details Ambient temperature compensated double bridge anemometer Ambient temperature compensated double bridge anemometer

1984-03-13

1985-10-22

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

045480770

ABSTRACT:
A hot film bridge type flow measuring device having improved compensation for ambient temperature changes employs a chip on which two electrical bridges are situated. Each bridge has at least two of its arms formed by hot film temperature sensitive resistors. The resistors of the two bridges are disposed in parallel pairs on the chip but one bridge faces 90.degree. with respect to the other bridge. The output of each bridge is fed to the input of its own differential amplifier and the outputs of those differential amplifiers provide the inputs to a third differential amplifier.

REFERENCES:
patent: 3429178 (1969-02-01), Durbin
patent: 3996799 (1976-12-01), van Putten

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