Software correction method and apparatus for a variable orifice flow meter
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United States of America Patent
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-
Aug 1, 2006
Grant Date -
Dec 29, 2005
app pub date -
Jun 25, 2004
filing date -
Jun 25, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of improving the accuracy of a variable orifice flow meter that includes characterizing the discharge coefficient of the flow meter orifice for different orifice openings and for different differential pressures. The method may be particularly useful with a flow metering and controlling device that includes a fluid flow conduit having at least one planar inner wall and an element having a linear edge configured to mate with the at least one planar inner wall of the fluid flow conduit. The element is movable relative to the conduit to define a flow orifice and vary a cross-sectional area of the orifice. The device also includes a processor configured to calculate the fluid flow based on the cross-sectional area of the orifice, the differential pressure, and the discharge coefficient.
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