Abstract
A security system has an alert function for a monitored area which, when active, responds to occupancy indicators for the monitored area by triggering intruder alerts. An initial occupancy indicator for the monitored area is received when the alert function for the monitored area is inactive. In response, illumination apparatus of the security system changes at least one characteristic of light in the monitored area, without triggering any intruder alert, and the alert function is activated for the monitored area. If a subsequent occupancy indicator for the monitored area is received from light sensing apparatus of the security system when the light in the monitored area is exhibiting the changed at least one characteristic, the active alert function responds by triggering an intruder alert. If no subsequent occupancy indicator is received for the monitored area from the light sensing apparatus, the change is reversed and the alert function is deactivated.
| Original language | English |
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| Patent number | WO2018158103 |
| IPC | G08B 25/ 00 A I |
| Priority date | 2/03/17 |
| Publication status | Published - 7 Sept 2018 |