Method and apparatus for use with vortex flowmeters

A method and apparatus for increasing the resolution and accuracy of flow measurements made by vortex flowmeters. A signal conditioning circuit connected to a vortex sensor generates a vortex signal having a period that varies with the frequency of the vortex street. The period of this vortex signal...

Full description

Saved in:
Bibliographic Details
Main Authors NGUYEN; TUYEN Q, FOX; HOWARD G, WATSON; CHRISTOPHER A
Format Patent
LanguageEnglish
Published 07.03.1989
Edition4
Subjects
MEASURING
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PHYSICS
TESTING
Online AccessGet full text

Cover

More Information
Summary:A method and apparatus for increasing the resolution and accuracy of flow measurements made by vortex flowmeters. A signal conditioning circuit connected to a vortex sensor generates a vortex signal having a period that varies with the frequency of the vortex street. The period of this vortex signal is measured by a period sampling circuit, which generates a vortex period signal. When a programmable control circuit determines that the change in the frequency indicated by successive values of the vortex period signal is relatively small, the displayed flow value is based on the current frequency of the vortex signal; when the change in frequency indicated by successive values of the vortex period signal is relatively large, the displayed flow value is based on the running average frequency of the vortex signal.
Bibliography:Application Number: US19870019444