Bob D. Peret,Brian H. Yoo,Derek G. Kane,Dean Kamen,Colin H. Murphy,John M. Kerwin
申请号：
US14938368
公开号：
US09746094B2
申请日:
2015.11.11
申请国别(地区):
US
年份:
2017
代理人:
摘要：
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.
