- 专利标题： MOTION DETECTOR WITH MASKING DETECTION
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申请号： EP21204785.6申请日： 2021-10-26
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公开(公告)号： EP4174814A1公开(公告)日： 2023-05-03
- 发明人: MANSFELD, Sebastian , MILEK, Tadeusz , SULKOWSKI, Lukasz , MORUSIEWICZ, Marcin
- 申请人： Carrier Fire & Security EMEA BV
- 申请人地址： BE 1831 Diegem Kouterveldstraat, 2
- 代理机构： Dehns
- 主分类号： G08B29/04
- IPC分类号： G08B29/04 ; G08B13/193
摘要：
A motion detector (1) for a security system comprises a primary sensing system including a PIR sensor (5) configured to detect movement of a person within a monitored environment (2), and an ancillary sensing system including a first emitter (7), a second emitter (8) and a receiver (9) configured to detect masking of the primary sensing system.
Masking by an object (10) in the monitored environment (2) is determined using the first emitter (7) and the receiver (9) based on a time-of-flight of an optical signal emitted into the monitored environment (2) and reflected by the object (10). Masking by obscuring of a window (4) of the motion detector (1) is determined using the second emitter (8) and the receiver (9) based on the intensity of light transmission from the second emitter (8) through the window (4) to the receiver (9).
Masking by an object (10) in the monitored environment (2) is determined using the first emitter (7) and the receiver (9) based on a time-of-flight of an optical signal emitted into the monitored environment (2) and reflected by the object (10). Masking by obscuring of a window (4) of the motion detector (1) is determined using the second emitter (8) and the receiver (9) based on the intensity of light transmission from the second emitter (8) through the window (4) to the receiver (9).
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