09746094 is referenced by 12 patents and cites 457 patents.

A flow meter includes a first image sensor, a background pattern, and at least one processor. The first image sensor has a first field of view and is positioned to view a drip chamber within the first field of view. The background pattern is positioned within the field of view of the first image sensor, and the background pattern includes first and second portions. The processor is operatively coupled to the first image sensor and configured to: receive a first image from the first image sensor, and estimate at least one parameter of liquid within the drip chamber in accordance with a distortion of the background pattern caused by the liquid as indicated by the first image.

Title
Flow meter having a background pattern with first and second portions
Application Number
14/938368
Publication Number
9746094 (B2)
Application Date
November 11, 2015
Publication Date
August 29, 2017
Inventor
John M Kerwin
Manchester
NH, US
Colin H Murphy
Cambridge
MA, US
Dean Kamen
Bedford
NH, US
Derek G Kane
Manchester
NH, US
Brian H Yoo
Cambridge
MA, US
Bob D Peret
Bedford
NH, US
Agent
James D Wyninegar Jr
Assignee
DEKA Products Partnership
NH, US
IPC
G06K 9/40
H04N 7/18
G06T 5/50
G06T 5/00
G06T 7/60
G06T 7/00
G06K 9/52
G01F 1/66
A61M 5/172
A61M 5/14
A61M 5/168
G06T 3/00
G06K 9/62
G05B 15/02
G05D 7/06
G06T 7/20
F16K 27/00
View Original Source