Coriolis-type mass flowmeter

Details Coriolis-type mass flowmeter Coriolis-type mass flowmeter

1987-04-20

1988-07-12

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Mass flow by imparting angular or transverse momentum to the...

G01F 184

Patent

active

047561971

ABSTRACT:
A mass flowmeter of the Coriolis-type in which the fluid to be metered is conducted through a loop supported on a stationary frame, the loop having a natural resonance frequency. Mounted at the vertex of the loop is a ballistic vibrator which is electrically energized to cause the loop to vibrate at its natural frequency on either side of its static plane. The fluid passing through the loop is subjected to Coriolis forces, causing the vibrating loop to torsionally oscillate in accordance with the mass flow rate of the fluid. This torsional oscillation is sensed by a pair of strain gauge transducers mounted in balanced relation on opposite legs of the loop, whereby the signals yielded by the transducers have a difference in magnitude therebetween that depends on the amplitude of the torsional oscillation. These signals are applied to a differential amplifier whose output is proportional to the mass flow rate of the fluid.

REFERENCES:
patent: 4127028 (1978-11-01), Cox et al.
patent: 4187721 (1980-02-01), Smith
patent: 4660421 (1987-04-01), Dahlin et al.

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