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.
Type:
Grant
Filed:
November 5, 2010
Date of Patent:
November 29, 2011
Assignee:
Fluidnet Corporation
Inventors:
Jeffrey A. Carlisle, Charles E. Kramer, John M. Kirkman, Jr., Douglas E. Vincent