Impulse analysis for flow sensor-based fluid control system
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United States of America Patent
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Nov 29, 2011
Grant Date -
Feb 24, 2011
app pub date -
Nov 5, 2010
filing date -
Mar 14, 2008
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Abstract
A fluid flow control system using flow rate changes to extract additional information from an in-line flow sensor. The system provides the ability to determine a position of a movable flow sensor element of a flow sensor by illuminating a photosensitive pixel array with a light source to create a first set of pixel intensity values introducing an abrupt change to the fluid driving pressure, illuminating the photosensitive pixel array with a light source to create a second set of pixel intensity values, and calculating the difference between the first and second sets of pixel intensity values as a function of pixel position.
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