Coriolis-type fluid mass flow rate measurement device and method

Details Coriolis-type fluid mass flow rate measurement device and method Coriolis-type fluid mass flow rate measurement device and method

1994-05-11

1995-07-04

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

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

324 7682, 364481, 364510, G01F 184, G01R 2500

Patent

active

054290023

ABSTRACT:
A Coriolis-type fluid flow rate measuring system splits a fluid flow that is to be measured into two equal half flows and passes the same respectively through two physically similar conduits which are oscillated about respective parallel oscillation axes. Analog sinusoidal signals corresponding to relative velocity of motion between the two conduits are obtained at two locations, the analog signals a digitized, and a conventional microprocessor is used to apply a least-squares sine fit to the digitized data to determine to a very high degree of accuracy a phase shift between the signals. An empirical proportionality factor is determined for the system to relate phase shift to fluid flow rate and is used to determine the fluid flow rate. The least-squares sine fit provides an accurate, economically computed fluid flow rate, and the apparatus is highly insensitive to temperature induced effects, harmonic distortions, and the combined effects of noise and harmonic distortion.

REFERENCES:
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patent: 4582410 (1989-08-01), Corwon et al.
patent: 4934196 (1990-06-01), Romano
patent: 5052231 (1991-10-01), Christ et al.
patent: 5235287 (1993-08-01), Sanderson et al.

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