US 11,669,981 B2
Occupant counting device
James P. Steiner, Royersford, PA (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Aug. 18, 2021, as Appl. No. 17/405,703.
Application 17/405,703 is a continuation of application No. 16/549,984, filed on Aug. 23, 2019, granted, now 11,127,144.
Claims priority of provisional application 62/783,525, filed on Dec. 21, 2018.
Claims priority of provisional application 62/722,555, filed on Aug. 24, 2018.
Prior Publication US 2021/0383556 A1, Dec. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 7/277 (2017.01); G06T 7/136 (2017.01); G06T 7/215 (2017.01); G01S 5/02 (2010.01); G01S 13/86 (2006.01)
CPC G06T 7/277 (2017.01) [G01S 5/0294 (2013.01); G01S 13/867 (2013.01); G06T 7/136 (2017.01); G06T 7/215 (2017.01)] 22 Claims
OG exemplary drawing
 
1. A device configured to detect an occupant entering or exiting a space, the device comprising:
a detection circuit configured to detect the occupant in a coverage area of the space, generate one or more signals indicating a location of the occupant in the coverage area, and generate an occupant map that indicates the location of the occupant; and
a control circuit comprising a tracking filter, wherein the control circuit is configured to:
receive the one or more signals from the detection circuit;
determine preliminary coordinates of the occupant in the occupant map based on the one or more signals received from the detection circuit;
adjust the preliminary coordinates using the tracking filter to determine the location of the occupant in the occupant map;
determine movements of the occupant through a plurality of zones of the coverage area; and
determine whether the occupant has entered or exited the space based on the movements of the occupant through the plurality of zones of the coverage area.