Intrusion detection method and apparatus

Details Intrusion detection method and apparatus Intrusion detection method and apparatus

G - Physics

08

B

349/30

G08B 13/16 (2006.01)

Patent

CA 1130908

6D-5173 ABSTRACT OF THE DISCLOSURE A pulse echo intrusion detection method and apparatus is described wherein a reference parameter is automatically established which is representative of an interval of time elapsed during initial projection and reflection of pulse energy between a source and a receiver. The reference parameter is periodically compared with successive pulse projection and reflection time measurements in order to sense variations indicative of a changed environ- ment such as might be caused by the presence of an intruding object.

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