US 11,657,692 B1
Smoke detector
Ronald Knox, Mount Eliza (AU); and Bhanusri Yellapragada, Mount Waverley (AU)
Assigned to Honeywell International Inc., Charlotte, NC (US)
Filed by Honeywell International Inc., Charlotte, NC (US)
Filed on Oct. 28, 2021, as Appl. No. 17/513,194.
Int. Cl. G08B 17/107 (2006.01); G01S 7/481 (2006.01)
CPC G08B 17/107 (2013.01) [G01S 7/4811 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A smoke detector, comprising:
a laser emitter configured to emit a laser beam that illuminates an object in an area;
a light receiver configured to receive light reflected from the illuminated object; and
a controller configured to:
determine, based on an intensity of the light reflected from the illuminated object, an amount of space in the area that is blocked from a field of view of the smoke detector by the object; and
provide an indication responsive to the determined amount of space being above a threshold amount of space.