Patent ID: 7019648
Filing Date: 2006-03-28
Classification: G08B

Abstract:
1. A detection system for detecting intruders moving in the vicinity of a defined path comprises a distributed antenna extending along the path, and an array of discrete antennas extending alongside the distributed antenna and within a predetermined distance therefrom, the discrete antennas and the distributed antenna defining a plurality of detection zones, a radio frequency transmitter connected to each of the discrete antennas, a complementary receiver connected to the distributed antenna, and control means for controlling the transmitters, receiver and array of antennas to exchange radio frequency energy between the distributed antenna and the discrete antennas and to analyze the energy received from said the discrete antennas so as to detect perturbations caused by an intruder moving adjacent said path and adjacent a particular antenna, a plurality of cameras associated with the plurality of discrete antennas and coupled to the control means for transmission of video signals thereto, the control means further comprising means for selecting for display a signal from a particular camera in dependence upon the detection of a perturbation from an adjacent discrete antenna.