Brief description of the transmission of signals, intended in particular for the supervision of a set of areas a protect, between a central station and a plurality detection circuits connected to that - with a support and transmission system for the implementation of such a process

摘要

The present invention relates to a method and system for monitoring regions to be protected. According to the invention, each detection circuit 2 connected to the central set 1 via a transmission medium 11, 12 comprises a metering device 202 connected to a generator device 201 for modifying in a predetermined manner the response signal transmitted by the latter to the central set 1. The central processing unit 100 of the set 1 comprises a memory 107 and a register 108 for determining whether the detection of two distorted signals received consecutively by the same detection circuit actually occurs at a predetermined number of identification signal reception cycles. The present invention finds an application in the monitoring, in particular, of premises or installations to be protected. IMAGE