Patent ID: 11951514
Assignee: HONEYWELL INTERNATIONAL INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A system for controlling a fume hood comprising:
a first camera configured to provide images from a first vantage point, the first camera having a field of view that includes at least part of a fume hood opening;
a second camera configured to provide images from a second vantage point that is different from the first vantage point, the second camera having a field of view that includes at least part of a fume hood opening;
a controller operatively coupled to the first camera and the second camera, the controller is configured to:
determine when at least part of the field of view of the first camera that includes at least part of the fume hood opening is at least partially blocked by an intervening object and at least part of the field of view of the second camera captures at least part of the fume hood opening that is at least partially blocked by the intervening object in the field of view of the first camera, and when so, determine one or more characteristics of the fume hood opening based at least part on the field of view of the second camera that captures at least part of the fume hood opening that is at least partially blocked by the intervening object in the field of view of the first camera, wherein determining the one or more characteristics of the fume hood opening includes operating an edge detection algorithm to detect one or more edges of the fume hood opening in at least part of one of the images of the second camera that captures at least part of the fume hood opening that is at least partially blocked by the intervening object in the field of view of the first camera; and

provide a control signal to a ventilation device to produce a desired airflow in the fume hood based at least in part upon the determined one or more characteristics of the fume hood opening.