Mass-flow sensor using aerodynamic damping

Details Mass-flow sensor using aerodynamic damping Mass-flow sensor using aerodynamic damping

1990-03-12

1991-03-19

Orsino, Joseph A.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

73704, 73702, 73 32A, G01N 300

Patent

active

050000500

ABSTRACT:
A fluid mass flow sensor uses the effect of aerodynamic drag on a vibrating object. The drag damps the resonance oscillations of the vibrator in an amount proportional to the mass flow. An electronic feedback circuit associated with the mass flow sensor has the effect of allowing for fast response time despite the use of a high Q vibrator and allows for electronic calibration of the device.

REFERENCES:
patent: 4024759 (1977-05-01), Klinger et al.
patent: 4488439 (1984-12-01), Gast et al.
patent: 4739664 (1988-04-01), Hetrick

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