US 12,442,690 B2
Systems and methods for people counting using beam-forming passive infrared sensors having a dynamically configurable field of view
Eric Bertrand Shen, Bedford, MA (US); and Jin Yu, Lexington, MA (US)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 18/010,845
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Jul. 1, 2021, PCT No. PCT/EP2021/068181
§ 371(c)(1), (2) Date Dec. 16, 2022,
PCT Pub. No. WO2022/008340, PCT Pub. Date Jan. 13, 2022.
Claims priority of provisional application 63/050,376, filed on Jul. 10, 2020.
Claims priority of application No. 20186429 (EP), filed on Jul. 17, 2020.
Prior Publication US 2023/0228624 A1, Jul. 20, 2023
Int. Cl. G01J 5/0806 (2022.01); G01J 5/00 (2022.01); G01J 5/34 (2022.01); G02F 1/29 (2006.01); H05B 47/13 (2020.01)
CPC G01J 5/0025 (2013.01) [G01J 5/0806 (2013.01); G01J 5/34 (2013.01); G02F 1/29 (2013.01); H05B 47/13 (2020.01); G02F 2203/11 (2013.01); G02F 2203/28 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A detection method comprising the steps of:
providing a first motion sensor in an area comprising a plurality of sub-areas, wherein the first motion sensor comprises an optical element having a plurality of sub-lenses, each sub-lens of the plurality of sub-lenses having a field of view (FOV) corresponding to a sub-area of the plurality of sub-areas;
activating the plurality of sub-lenses to generate a total sensor FOV comprising each FOV of the sub-lenses;
receiving, at the plurality of sub-lenses, infrared energy emitted by an individual or an object present in the area;
focusing, by the plurality of sub-lenses, the received infrared energy onto at least two sensing elements comprising a pyroelectric element; and
dynamically controlling the plurality of sub-lenses to subdivide the total sensor FOV, wherein the subdivided sensor FOV is smaller than the total sensor FOV, and wherein at least one sub-lens of the plurality of sub-lenses comprises an electrochromic photothermal material.