GB984398A - Detection system - Google Patents

Detection system

Info

Publication number
GB984398A
GB984398A GB3707863A GB3707863A GB984398A GB 984398 A GB984398 A GB 984398A GB 3707863 A GB3707863 A GB 3707863A GB 3707863 A GB3707863 A GB 3707863A GB 984398 A GB984398 A GB 984398A
Authority
GB
United Kingdom
Prior art keywords
comparator
boundary
detector
intruder
beams
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
GB3707863A
Inventor
Arthur Edward Brewster
Raymond Harry Julian
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 GB3707863A priority Critical patent/GB984398A/en
Publication of GB984398A publication Critical patent/GB984398A/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
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

984, 398. Intruder alarms. STANDARD TELEPHONES & CABLES Ltd. Sept. 20, 1963, No. 37078/63. Heading G4N. [Also in Division H4] An intruder detection system includes two beams of radiation propagated in opposite directions along a boundary to be protected, each end of the boundary being provided with a detector 3, 4 and a comparator 7 for comparing the relative times at which interruption of the beam is detected. As shown in Fig. 1, two light beams are transmitted coaxially by transmitters 1, 2 and the difference in received times of an interruption denotes the position of the intruder along the boundary. The comparator 7 is positioned symmetrically with respect to the detectors to equalize time delays. In a second embodiment Fig. 2 (not shown) only one transmitter is used, the other being replaced by a reflector. The comparator is also situated adjacent one detector, and a delay equalizer is inserted into the connection between this detector and the comparator. In a further embodiment Fig. 3 (not shown) two closely spaced beams are used instead of coaxial ones. Other forms of radiation such as infra-red, ultra violet, microwave, or sonic waves may be used. The signal may be pulsed or continuous.
GB3707863A 1963-09-20 1963-09-20 Detection system Expired GB984398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3707863A GB984398A (en) 1963-09-20 1963-09-20 Detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3707863A GB984398A (en) 1963-09-20 1963-09-20 Detection system

Publications (1)

Publication Number Publication Date
GB984398A true GB984398A (en) 1965-02-24

Family

ID=10393550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3707863A Expired GB984398A (en) 1963-09-20 1963-09-20 Detection system

Country Status (1)

Country Link
GB (1) GB984398A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2424594A1 (en) * 1978-04-28 1979-11-23 Zellweger Uster Ag VIRTUAL PROTECTION OPTICAL SPEAKERS, USED FOR SPACE MONITORING AND CONTAINING ALERT AND PROTECTION ZONES
DE2854215A1 (en) * 1978-12-15 1980-06-19 Eltro Gmbh METHOD AND DEVICE FOR SHIP IDENTIFICATION
GB2128836A (en) * 1979-06-06 1984-05-02 Zellweger Uster Ag Method and apparatus for monitoring discrete surfaces
US4855717A (en) * 1987-02-27 1989-08-08 Jd-Technologie Ag Security device for conveying systems with unmanned vehicles
GB2282504A (en) * 1987-05-19 1995-04-05 British Aerospace Surveillance system
US5468963A (en) * 1987-05-19 1995-11-21 British Aerospace Public Limited Company Surveillance system
WO2006087124A1 (en) * 2005-02-17 2006-08-24 Atlas Elektronik Gmbh Device for monitoring a water-supplying inlet channel
WO2007039595A1 (en) * 2005-10-06 2007-04-12 Robert Bosch Gmbh High-frequency monitoring system
GB2514103A (en) * 2013-05-12 2014-11-19 Microsense Solutions Ltd Bidirectional bistatic radar perimeter intrusion detection system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2424594A1 (en) * 1978-04-28 1979-11-23 Zellweger Uster Ag VIRTUAL PROTECTION OPTICAL SPEAKERS, USED FOR SPACE MONITORING AND CONTAINING ALERT AND PROTECTION ZONES
DE2854215A1 (en) * 1978-12-15 1980-06-19 Eltro Gmbh METHOD AND DEVICE FOR SHIP IDENTIFICATION
GB2128836A (en) * 1979-06-06 1984-05-02 Zellweger Uster Ag Method and apparatus for monitoring discrete surfaces
US4855717A (en) * 1987-02-27 1989-08-08 Jd-Technologie Ag Security device for conveying systems with unmanned vehicles
GB2282504A (en) * 1987-05-19 1995-04-05 British Aerospace Surveillance system
GB2282504B (en) * 1987-05-19 1995-08-09 British Aerospace Surveillance system
US5468963A (en) * 1987-05-19 1995-11-21 British Aerospace Public Limited Company Surveillance system
WO2006087124A1 (en) * 2005-02-17 2006-08-24 Atlas Elektronik Gmbh Device for monitoring a water-supplying inlet channel
WO2007039595A1 (en) * 2005-10-06 2007-04-12 Robert Bosch Gmbh High-frequency monitoring system
GB2514103A (en) * 2013-05-12 2014-11-19 Microsense Solutions Ltd Bidirectional bistatic radar perimeter intrusion detection system
GB2514103B (en) * 2013-05-12 2017-08-02 Microsense Solutions Ltd Bidirectional bistatic radar perimeter intrusion detection system

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