GB2048536B - Intruder detection system - Google Patents

Intruder detection system

Info

Publication number
GB2048536B
GB2048536B GB8013259A GB8013259A GB2048536B GB 2048536 B GB2048536 B GB 2048536B GB 8013259 A GB8013259 A GB 8013259A GB 8013259 A GB8013259 A GB 8013259A GB 2048536 B GB2048536 B GB 2048536B
Authority
GB
United Kingdom
Prior art keywords
detection system
intruder detection
intruder
detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8013259A
Other versions
GB2048536A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB8013259A priority Critical patent/GB2048536B/en
Publication of GB2048536A publication Critical patent/GB2048536A/en
Application granted granted Critical
Publication of GB2048536B publication Critical patent/GB2048536B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
    • G08B13/2497—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field using transmission lines, e.g. cable
GB8013259A 1980-04-22 1980-04-22 Intruder detection system Expired GB2048536B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8013259A GB2048536B (en) 1980-04-22 1980-04-22 Intruder detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8013259A GB2048536B (en) 1980-04-22 1980-04-22 Intruder detection system

Publications (2)

Publication Number Publication Date
GB2048536A GB2048536A (en) 1980-12-10
GB2048536B true GB2048536B (en) 1983-12-21

Family

ID=10512938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8013259A Expired GB2048536B (en) 1980-04-22 1980-04-22 Intruder detection system

Country Status (1)

Country Link
GB (1) GB2048536B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL62589A (en) * 1981-04-05 1988-02-29 Israel Aircraft Ind Ltd Electromagnetic field perimeter detection apparatus
DE3533479A1 (en) * 1985-09-19 1987-03-26 Seba Mess Ortungstech METHOD FOR MONITORING AN OBJECT BY MEANS OF A SIGNAL LINE AND IMPULSE MEASURING DEVICE FOR IMPLEMENTING THIS METHOD
IT1218109B (en) * 1986-05-02 1990-04-12 Dei Dispositivi Elettronici In EQUIPMENT FOR DETECTION OF MOVING BODIES ON THE GROUND IN A PROTECTED AREA, IN PARTICULAR FOR MILITARY AND RELATED USES
FR2630238A1 (en) * 1988-04-15 1989-10-20 Thomson Csf Device for surveillance by cable
US5581256A (en) * 1994-09-06 1996-12-03 The Regents Of The University Of California Range gated strip proximity sensor
JP3703689B2 (en) * 2000-06-01 2005-10-05 三菱電機株式会社 Obstacle detection device and obstacle detection system
FR2868542B1 (en) * 2004-04-01 2006-05-26 Schneider Electric Ind Sas HYPERFREQUENCY PROXIMITY DEVICE
US7994912B2 (en) 2006-01-12 2011-08-09 Mitsubishi Electric Corporation Intrusion-object detection system, method of detecting intrusion-object and method of detecting malfunction
WO2009006646A1 (en) * 2007-07-02 2009-01-08 Nedsis Bv Electrical fence monitoring system

Also Published As

Publication number Publication date
GB2048536A (en) 1980-12-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee