Process for the measurement of weight flow-rates and related dev

Details Process for the measurement of weight flow-rates and related dev Process for the measurement of weight flow-rates and related dev

1987-12-22

1990-01-23

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

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

G01F 184

Patent

active

048950300

ABSTRACT:
A process is disclosed for the measurement of the mass flow-rate of fluid flowing inside a pipe made to oscillate at a certain frequency and at a constant and controlled amplitude by an impulse-generating unit. The process consists of making the pipe constantly oscillate at exactly at its twisting resonance frequency, counteracting the pipe's oscillations with a plurality of brakes, exerting a braking force on the pipe which is proportional to the pipe's shifting speed and which force has an amplitude larger than the amplitude of the Coriolis forces acting on the pipe, detecting the pipe's motion at two points along the pipe symmetrically disposed about its middle and where the greatest twisting deformation occurs, and measuring, after all distrubances have been eliminated, the differences in the amplitude of these two shifts, these differences being directly proportional to the flow-rate.

REFERENCES:
patent: Re31450 (1983-11-01), Smith
patent: 4711132 (1987-12-01), Dahlin

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