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Flow metering using a difference image for liquid parameter estimation

  • US 9,856,990 B2
  • Filed: 08/09/2017
  • Issued: 01/02/2018
  • Est. Priority Date: 12/21/2011
  • Status: Active Grant
First Claim
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1. A flow meter, comprising:

  • a coupler adapted to couple to a drip chamber;

    a support member operatively coupled to the coupler;

    a background pattern disposed behind the drip chamber;

    an image sensor having a field of view and operatively coupled to the support member, wherein the image sensor is positioned to view the drip chamber within the field of view; and

    at least one processor in communication with the image sensor to receive data from the image sensor, wherein the at least one processor is configured to;

    receive a first image from the image sensor,compare the first image to a second image, andgenerate a difference image based upon the comparison between the first and second images.

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