Mark Thomas Johnson,Marieke Van Dooren,Giovanni Cennini
申请号：
US13879865
公开号：
US20130200254A1
申请日:
2011.10.20
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A presence detection system (1) for detecting a living being (10) within an area (12). The area (12) comprises at least two zones (12A12B). The system (1) in total comprises at least two light sources (2A2B) each of them having a different predefined spectrum and each of them radiating light in a different zone (12A12B). The system comprises at least two sensing means (4A4B) sensitive to light of the first predefined spectrum and the second predefined spectrum respectively. Each of the sensing means (4A4B) is arranged for detecting light reflected from the living being (10) if present in the zone (12A12B) of the area (12) and for generating a presence signal (14A14B) based on detected light. The system comprises a processor device (8) that concludes the presence of the living being (10) within the area (12) in a zone wise way based on the presence signals. Such presence detection system provides relatively precise presence detection. The invention also relates to a lighting system comprising the above mentioned presence detection system (1).
