초록 ▼

An apparatus for the detection of any intruder passing through an electronic fence is disclosed. The electronic fence is formed by a millimeter wave radar positioned at one end of the fence and a plurality of reflectors placed along the floor of the fence as well as on a structure at its far end. Th

An apparatus for the detection of any intruder passing through an electronic fence is disclosed. The electronic fence is formed by a millimeter wave radar positioned at one end of the fence and a plurality of reflectors placed along the floor of the fence as well as on a structure at its far end. The fence is formed of a plurality of electromagnetic beams traversing between the radar antenna or antennas and each of the reflectors. A sufficient number of beams inhabit the fence volume to make traversing the fence by an intruder without detection essentially impossible. The radar reflection from the intruder's person is used to report the location of an intruder attempting to traverse the electronic fence near the radar end and is the secondary means of detection at greater ranges where breaking of one or more electromagnetic beams constitutes the primary means of detection.

대표청구항 ▼

1. An apparatus for detection of any intruder passing through a protected volume, comprising:a generating means for generating and modulating electromagnetic wave energy; a focusing means coupled to said generating means for radiating said electromagnetic wave energy into said protected volume; a co

1. An apparatus for detection of any intruder passing through a protected volume, comprising:a generating means for generating and modulating electromagnetic wave energy; a focusing means coupled to said generating means for radiating said electromagnetic wave energy into said protected volume; a collecting means colocated with said focusing means for gathering a portion of said radiated electromagnetic energy; a plurality of reflectors positioned at separate ranges along the base and distal end of said protected volume for reflecting a portion of said radiated electromagnetic energy, thereby forming an electromagnetic beam between each said reflector and said collecting means, said electromagnetic beam comprising radiated and reflected electromagnetic energy and having a length unique to each said reflector; a structure located at the proximal end of said protected volume and coupled to both said focusing means and said collecting means for supporting said focusing means and said collecting means at a position or positions above said base of said protected volume for providing line-of-sight propagation of said electromagnetic beams between said focusing means and said collecting means and each of said plurality of reflectors; a signal processing means coupled to said collecting means and capable of determining the range to objects irradiated by said radiated electromagnetic energy, said signal processing means for monitoring the presence of said electromagnetic beams associated with each said reflector and detecting the physical presence of said intruders within said protected volume; and an alarm circuit coupled to said signal processing means for generating an alarm when any one or more of said electromagnetic beams are interrupted or when said physical presence of said intruder is detected within said protected volume.