Vortex flowmeter with dual sensors

Details Vortex flowmeter with dual sensors Vortex flowmeter with dual sensors

1990-10-29

1992-03-17

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 132

Patent

active

050957600

ABSTRACT:
A vortex shedding flowmeter includes a vortex sensor detecting lift force generated by vortices shed from the vortex generator and experienced thereby, and a noise sensor detecting mechanical vibrations experienced commonly thereby and by the vortex sensor, wherein two electrical signals respectively generated by the vortex and noise sensors are combined in such a way that noise associated with the mechanical vibrations is cancelled therebetween and a resultant electrical signal representing the vortex shedding from the vortex generator is obtained, which resultant electrical signal provides information on the frequency and amplitude of the lift force alternating in time experienced by the vortex sensor, wherein volume flow rate of the fluid is determined from the frequency of the alternating lift force, mass flow rate of the fluid is determined as a function of the frequency and amplitude of the alternating lift force, and the density of fluid is determined from the ratio of the mass flow rate to the volume flow rate of the fluid.

REFERENCES:
patent: 4526040 (1985-07-01), Matsubara
patent: 4716770 (1988-01-01), Herzog
patent: 4862750 (1989-09-01), Nice

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