GB1452499A - Electromagnetic intrustion detection system - Google Patents

Electromagnetic intrustion detection system

Info

Publication number
GB1452499A
GB1452499A GB5641773A GB5641773A GB1452499A GB 1452499 A GB1452499 A GB 1452499A GB 5641773 A GB5641773 A GB 5641773A GB 5641773 A GB5641773 A GB 5641773A GB 1452499 A GB1452499 A GB 1452499A
Authority
GB
United Kingdom
Prior art keywords
intruder
signal
alarm
dec
transmitter
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
GB5641773A
Other languages
English (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.)
AEROSPACE RES
Original Assignee
AEROSPACE RES
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 AEROSPACE RES filed Critical AEROSPACE RES
Publication of GB1452499A publication Critical patent/GB1452499A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
GB5641773A 1972-12-08 1973-12-05 Electromagnetic intrustion detection system Expired GB1452499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US313613A US3863240A (en) 1972-12-08 1972-12-08 Electromagnetic intrusion detection system

Publications (1)

Publication Number Publication Date
GB1452499A true GB1452499A (en) 1976-10-13

Family

ID=23216421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5641773A Expired GB1452499A (en) 1972-12-08 1973-12-05 Electromagnetic intrustion detection system

Country Status (5)

Country Link
US (1) US3863240A (US20110158925A1-20110630-C00042.png)
JP (1) JPS501700A (US20110158925A1-20110630-C00042.png)
DE (1) DE2361106A1 (US20110158925A1-20110630-C00042.png)
FR (1) FR2209963B1 (US20110158925A1-20110630-C00042.png)
GB (1) GB1452499A (US20110158925A1-20110630-C00042.png)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU8033275A (en) * 1974-04-23 1976-10-21 Cabili Electronics Pty. Ltd False alarm inhibitor
US3973250A (en) * 1974-11-12 1976-08-03 Uffelman Malcolm R Acoustically coupled burglar alarm system
US3922660A (en) * 1974-12-12 1975-11-25 American District Telegraph Co Volumetric intrusion alarm using both Doppler and net-change signal processing
US3949398A (en) * 1974-12-16 1976-04-06 International Telephone And Telegraph Corporation MTI performance enhancement device with instantaneous automatic gain control
US4023156A (en) * 1975-01-30 1977-05-10 American District Telegraph Company Alarm system for detecting disturbance of a solid medium
US4027303A (en) * 1975-05-22 1977-05-31 Neuwirth Karl R Apparatus for detecting the presence of objects by sensing reflected energy
US4144529A (en) * 1977-05-20 1979-03-13 George B. Miller Remotely responsive motion detector
ZA7994B (en) * 1978-01-11 1980-01-30 Tag Radionics Ltd Presence sensing system
US4481428A (en) * 1981-05-19 1984-11-06 Security Tag Systems, Inc. Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
JPS6023483A (ja) * 1983-07-16 1985-02-06 Res Assoc Petroleum Alternat Dev<Rapad> 重質油の処理方法
FR2628556A1 (fr) * 1988-03-11 1989-09-15 Milin Marcel Detection de modification d'un volume par un corps conducteur
SE9203904D0 (sv) * 1992-01-31 1992-12-23 Kenneth Gustavsson Anordning foer att oevervaka en zon samt positionering av objekt inom denna
US5576627A (en) * 1994-09-06 1996-11-19 The Regents Of The University Of California Narrow field electromagnetic sensor system and method
GB0202080D0 (en) * 2002-01-30 2002-03-13 Intelligent Sensors Ltd Detection of objects
RU2383033C2 (ru) * 2004-09-07 2010-02-27 РАЛЕН РЕСЕАРХ ЦЕНТРУМ, с.р.о. Электронный блок, предназначенный для обнаружения живых организмов
US8169356B2 (en) * 2007-12-31 2012-05-01 Honeywell International Inc. Anti-mask motion sensor
EP4285149A1 (de) * 2021-01-26 2023-12-06 Real-Cis GmbH Verfahren und einrichtung zur erkennung von veränderungen einer geometrischen anordnung, der beschaffenheit oder der menge von gegenständen oder körpern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE25100E (en) * 1954-04-13 1961-12-19 chapin
US3163861A (en) * 1962-05-02 1964-12-29 Suter Henry Electromagnetic field disturbance intruder detection apparatus
US3331065A (en) * 1962-05-31 1967-07-11 Sylvania Electric Prod Signal processing circuit for intrusion alarm system
US3343167A (en) * 1966-10-21 1967-09-19 Sperry Rand Corp Object detection system
US3665443A (en) * 1970-09-03 1972-05-23 Aerospace Res Ultrasonic intrusion alarm

Also Published As

Publication number Publication date
US3863240A (en) 1975-01-28
AU6327273A (en) 1975-06-05
JPS501700A (US20110158925A1-20110630-C00042.png) 1975-01-09
FR2209963B1 (US20110158925A1-20110630-C00042.png) 1978-07-13
FR2209963A1 (US20110158925A1-20110630-C00042.png) 1974-07-05
DE2361106A1 (de) 1974-06-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee