Patent ID: 6111502
Filing Date: 2000-08-29
Classification: G07C,G08B

Abstract:
System (1) for surveillance of premises (10), comprising:means for controlling access to these premises (10), comprising personal identification means, means (LA-LE) for reading these personal identification means and means (CS) for processing and granting requests for access to said premises (10),means for detecting any intrusion or unauthorised presence in said premises (10), comprising perimeter detection means (P1-P8) for detecting any intrusion into a defined perimeter around said premises (10), volumetric detection means (V1-V3) for detecting any presence in predetermined areas of said premises,this system (1) further including a programming timetable defining working periods and surveillance periods corresponding to the intrusion detection means being put into service,characterised in that the access-control means and the intrusion-detection means co-operate to postpone the activation of volumetric detection means (V1-V3) by a predetermined derogation period (TD) whenever the said access-control means, during periods when surveillance is in force, validate the presence of, or a request for access from, an authorised person provided with personal identification means, characterized in that the means of perimeter detection (P1 to P8) are kept active during the postponements of activation of the volumetric detection means (V1-V3).