Flow meter
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United States of America Patent
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-
Apr 25, 2006
Grant Date -
Apr 1, 2004
app pub date -
Jul 15, 2003
filing date -
Jul 16, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is a liquid volume-flow meter suitable for measuring extremely turbulent flow. The meter comprises a measuring chamber formed as a pipe having a wall of transparent material fitted inline with an existing pipe of similar diameter, whereby the detector has minimal effect upon the operation of an existing installation. The meter further comprises an optical velocity array for measuring the speed of liquid flowing within the measuring chamber and an optical area sensor for measuring the area within the measuring chamber occupied by liquid flowing. The optical area sensor comprises a plurality of arrays including a backscatter reflection array to estimate the height of liquid within the measuring chamber and at least one further correction array to correct the estimation made by the reflection array. Each array comprises an optical emitter and an optical detector that operate through the transparent wall of the measuring chamber.
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