Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-08-28
1989-05-09
Orsion, Jr., Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340550, 340548, G08B 1312
Patent
active
048292877
ABSTRACT:
In a taut wire type intrusion detection system, each parallel wire defining a section of security fence is tensioned between a pair of wire-supporting vertical anchor posts. Intermediate the anchor posts there is provided a row of regularly spaced vertical detector posts each presenting a plurality of individual sensors, each associated with one of the taut wires and operable to produce a sensor signal when the tension of the wires changes. With each detector post there is associated sensor signal processing means, operable to analyze the sensor signals produced by the sensors of the detector post in response to changes in tension of the taut wires, and to generate output signals correlatable with the sensor signals. Each sensor preferably includes a pressure transducer comprising a partially conductive compressible elastic sensing element whose resistance changes with applied pressure.
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Information Sheet Entitled: "Locator TW-3000 Taut Wire Fence Alarm", Vindicator Corporation, 1445 Oakland Rd., San Jose, CA 95112-1203, U.S.A., Aug. 1985.
Omega 1987, Complete Pressure, Strain and Force, Measurement Handbook and Encyclopedia, Omega Engineering, Inc. pp. A10-A15, E-35-E-62.
Kerr Reginald J.
Suo-Anttila Tapio
Chau Annie H.
Hitek-Proteck Systems Incorporated
Orsion, Jr. Joseph A.
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