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

Claim 18:
19. A method of controlling a fume hood, the method comprising:
obtaining a plurality of images from a plurality of image sensors, each of the plurality of images having a different vantage point and each having a field of view that includes at least part of a fume hood opening, wherein:
when a first one of the plurality of images has at least part of the field of view of the fume hood opening at least partially blocked by an intervening object, and a second one of the plurality of images captures at least part of the fume hood opening that is at least partially blocked by the intervening object in the first one of the plurality of images, determining a first control signal for a ventilation device associated with the fume hood to produce a desired airflow in the fume hood, wherein the first control signal is based at least in part upon the second one of the plurality of images that captures at least part of the fume hood opening that is at least partially blocked by the intervening object in the first one of the plurality of images, and providing the first control signal to control the ventilation device; and

when the second one of the plurality of images has at least part of the field of view of the fume hood opening at least partially blocked by an intervening object, and the first one of the plurality of images captures at least part of the fume hood opening that is at least partially blocked by the intervening object in the second one of the plurality of images, determining a second control signal for the ventilation device associated with the fume hood to produce a desired airflow in the fume hood, wherein the second control signal is based at least in part upon the first one of the plurality of images that captures at least part of the fume hood opening that is at least partially blocked by the intervening object in the second one of the plurality of images, and providing the second control signal to control the ventilation device.