Intrusion detector using a vibration-responsive cable

Details Intrusion detector using a vibration-responsive cable Intrusion detector using a vibration-responsive cable

1986-09-16

1988-08-16

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340524, G08B 1322

Patent

active

047647566

ABSTRACT:
A protective device includes a transmission line comprising two elongate co-extensive electrical conductors capable of sensing vibrations, converting these vibrations into electrical signals and transmitting the electrical signals. It also includes signal-processing means electrically connected to one pair of ends of the conductors. The signal-processing means includes normalizing means for normalizing the electrical signals, and a comparator for comparing the normalized signals with previously normalized known signals, thereby to identify the source of the signals transmitted along the cable, and hence an alarm
on-alarm condition.

REFERENCES:
patent: 3831162 (1974-08-01), Armstrong
patent: 3836899 (1974-09-01), Duvall et al.
patent: 3947835 (1976-03-01), Laymon
patent: 4097025 (1978-06-01), Dettmann et al.
patent: 4144530 (1979-03-01), Redfern
Bennett et al., "Bosworth Group Project 1978--Vehicle Recognition Radar," pp. 4/2, 4/3, 5/17, 6/15, 6/28-6/34, 6/43, 7/15-7/18, 7/21, and 7/22 with Appendix A, Master's Thesis published at Birmingham University, United Kingdom, 1978.
Article entitled "Development of Electric Transducer Line Sensors", by Dr. G. Kirby-Miller, GTE Sylvania Inc. (pp. 22 to 25).
Brochure entitled "Installation and Operating Instructions Fence Protection System FPS-2", Aug. 1978, GTE Sylvania Inc.
Brochure entitled "Installation Manual Model E-4/E.4 HR Control Unit E-Flex Perimeter Protection System", produced by Stellar Systems, Inc. (Aug. 1984).
Pamphlet entitled "Competitive Evaluation Fence-Mounted Sensors", produced by S. E. L. (Pty) Ltd., Feb. 1983.

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