Intrusion barrier and detection apparatus

Details Intrusion barrier and detection apparatus Intrusion barrier and detection apparatus

1984-06-06

1986-05-13

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

343 5PD, G08B 1318, G01S 1300

Patent

active

045889880

ABSTRACT:
A ported coaxial cable is positioned atop or wound around a coil of barbed wire and is coextensive therewith. Radio frequency energy applied to the cable is randomly dispersed about the exterior of the coil. Variations in the reflected energy caused by intrusion of the area adjacent the coil, including the areas above or beneath the coil, are processed by detection system signal processing equipment to determine the incidence and location of intrusion events.

REFERENCES:
patent: 3463455 (1969-08-01), Meckel
patent: 3560970 (1971-02-01), Kamimura et al.
patent: 3707709 (1972-12-01), Wolf et al.
patent: 4091367 (1978-05-01), Harman
patent: 4135185 (1979-01-01), Rotman et al.
patent: 4213122 (1980-07-01), Rotman et al.
patent: 4318102 (1982-03-01), Poirier
patent: 4327358 (1982-04-01), Karas
patent: 4503423 (1985-03-01), Mainiero et al.
patent: 4525701 (1985-06-01), Leih

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