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GB1335410A - Infrared intrusion detector system - Google Patents

Infrared intrusion detector system

Info

Publication number
GB1335410A
GB1335410A GB2013271A GB2013271A GB1335410A GB 1335410 A GB1335410 A GB 1335410A GB 2013271 A GB2013271 A GB 2013271A GB 2013271 A GB2013271 A GB 2013271A GB 1335410 A GB1335410 A GB 1335410A
Authority
GB
United Kingdom
Prior art keywords
sensor
lens
pass
fields
optical system
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
GB2013271A
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.)
Optical Coating Laboratory Inc
Original Assignee
Optical Coating Laboratory Inc
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 Optical Coating Laboratory Inc filed Critical Optical Coating Laboratory Inc
Publication of GB1335410A publication Critical patent/GB1335410A/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
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

1335410 Intruder alarms OPTICAL COATING LABORATORY Inc 19 April 1971 [6 Feb 1970] 20132/71 Heading G4N [Also in Division G1] An intrusion detection system comprises a sensor 11 for detecting infra-red radiation from the body of an intruder, an optical system 12 arranged to focus a plurality of discrete fields on to the sensor 11 and a band-pass filter 14 arranged to pass frequencies resulting from an intruder walking through said discrete fields but to discriminate against gradual changes within said fields. As shown in Fig. 1, an optical system 12 focuses discrete fields on to a thermistor bolometer sensor 11 the output of which is amplified by a band-pass amplifier 14 comprising a field effect or a junction transistor 26 feeding an operational amplifier 27. Capacitor 28 determines the lower frequency limit of 0À2 Hz whilst the upper frequency limit is set to 3 Hz by capacitor 37. An output above a predetermined voltage will pass detector 16 to operate relay 17 and set off a visual or audible alarm 18. The discrimination is improved by focusing a plurality of sector-shaped discrete fields on to the sensor 11 by means of a concave mirror (Figs. 9, 10) cut into sections, each formed of plastics material coated with chromium or aluminium. In Fig. 6, an annular field 68 corresponding to the perimeter of an area to be protected is focused on to the sensor 11 by means of a conical mirror 61 and lens 63. In Fig. 7 (not shown) the conical mirror is replaced by a pair of plane mirrors and the lens 63 by a concave mirror. In Fig. 8 (not shown) the optical system consists of a lens having one plane surface and one concave conical surface. In Fig. 12 (not shown) the complete apparatus is contained in a cylindrical container comprising a segmented concave mirror, the sensor 11 being screened from direct radiation and including a filter passing wavelengths between 4 and 20 microns formed by a dielectric coating on germanium.
GB2013271A 1970-02-06 1971-04-19 Infrared intrusion detector system Expired GB1335410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US931570A 1970-02-06 1970-02-06

Publications (1)

Publication Number Publication Date
GB1335410A true GB1335410A (en) 1973-10-31

Family

ID=21736902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2013271A Expired GB1335410A (en) 1970-02-06 1971-04-19 Infrared intrusion detector system

Country Status (3)

Country Link
DE (1) DE2103909C3 (en)
FR (1) FR2080963B1 (en)
GB (1) GB1335410A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145813A (en) * 1983-08-26 1985-04-03 Matsushita Electric Works Ltd Infrared intrusion detector
GB2199659A (en) * 1986-12-01 1988-07-13 Floorplan Electrica Ltd Occupancy sensing device
US5073706A (en) * 1987-12-18 1991-12-17 Kone Elevator Gmbh Procedure and apparatus for detecting objects moving at varying speeds within a certain area
US5444431A (en) * 1992-11-19 1995-08-22 Kenny; Paul M. Intrusion monitoring device
GB2411469A (en) * 2004-02-27 2005-08-31 Optex Co Ltd Passive infrared sensor having sub-mirrors disposed on its corresponding main mirrors
US8044336B2 (en) 2005-03-10 2011-10-25 Pyronix Limited Detector and optical system
CN112728372A (en) * 2020-12-31 2021-04-30 安徽砺剑防务科技有限公司 Distributed anti-theft alarm device

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2734157A1 (en) * 1958-02-22 1979-02-01 Heimann Gmbh PASSIVE INFRARED ALARM
JPS4861100A (en) * 1971-12-01 1973-08-27
CH591733A5 (en) * 1976-05-17 1977-09-30 Cerberus Ag
CH596619A5 (en) * 1976-06-16 1978-03-15 Cerberus Ag
CH596620A5 (en) * 1976-06-21 1978-03-15 Cerberus Ag
CH596621A5 (en) * 1976-06-30 1978-03-15 Cerberus Ag
CH599642A5 (en) * 1976-11-15 1978-05-31 Cerberus Ag
JPS5845645B2 (en) * 1978-03-27 1983-10-12 株式会社東芝 core components
DE2904654A1 (en) * 1979-02-07 1980-08-14 Heimann Gmbh OPTICAL ARRANGEMENT FOR A PASSIVE INFRARED MOTION DETECTOR
DE2930632C2 (en) * 1979-07-27 1982-03-11 Siemens AG, 1000 Berlin und 8000 München Pyrodetector
CH651941A5 (en) * 1979-09-10 1985-10-15 Cerberus Ag Optical arrangement for a radiation detector.
DE2937923C2 (en) * 1979-09-19 1984-05-24 Heimann Gmbh, 6200 Wiesbaden Arrangement for preventing false alarms from a passive infrared motion detector
EP0063663A1 (en) * 1981-04-29 1982-11-03 COMPAGNIE CENTRALE SICLI (Société Anonyme) Method and device for the detection of bodies in motion, and sensor therefor
DE3119720C2 (en) * 1981-05-18 1985-07-11 Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen Motion detector responding to electromagnetic radiation
FR2527814A1 (en) * 1982-05-25 1983-12-02 Thomson Csf Intruder alarm less prone to false alarms - activated IR emissions and ultrasonic reflection pref. includes polymer etc. components
DE3407426A1 (en) * 1984-02-29 1985-08-29 Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen MOTION DETECTOR
DE3447074C1 (en) * 1984-12-22 1986-08-14 Klaus 8000 München Maresch Single-phase switching apparatus having a voltage supply for a movement signalling device
FR2614984A1 (en) * 1987-05-05 1988-11-10 Argamakoff Aleksy Automatic forest fire detector
DE4005169A1 (en) * 1990-02-17 1991-08-22 Bellmann B V MOvement detector using IR sensor - converts sensor signals into digitally processed signals handled by microprocessor
DE4236618A1 (en) * 1992-10-29 1994-05-05 Hirschmann Richard Gmbh Co False alarm prevention device for infrared movement detector - has processor which generates alarm control signal only with occurrence of signal from external light sensor, when path of electrical signals from infrared detector deviates from preset course
EP0825573B2 (en) * 1996-08-19 2005-03-23 Siemens Aktiengesellschaft Method and device for signal evaluation of a movement detector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2198725A (en) * 1937-12-09 1940-04-30 Hammond V Hayes Alarm system
US3056106A (en) * 1958-07-14 1962-09-25 Gamewell Co Infrared detectors
US3226557A (en) * 1963-01-18 1965-12-28 Robert M Goodman Photosensitive scanner for detecting radiation from any azimuthal angle
US3480775A (en) * 1964-08-17 1969-11-25 Gen Dynamics Corp Radiation sensitive omnidirectional motion detector system
US3524180A (en) * 1967-01-27 1970-08-11 Santa Barbara Res Center Passive intrusion detecting system
US3476948A (en) * 1968-02-19 1969-11-04 Sylvania Electric Prod Optical intrusion detection system using reflected dual beam peripheral scanning
GB1264809A (en) * 1968-05-29 1972-02-23

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145813A (en) * 1983-08-26 1985-04-03 Matsushita Electric Works Ltd Infrared intrusion detector
GB2199659A (en) * 1986-12-01 1988-07-13 Floorplan Electrica Ltd Occupancy sensing device
GB2199659B (en) * 1986-12-01 1991-08-14 Floorplan Electrica Ltd Occupancy detectors etc
US5073706A (en) * 1987-12-18 1991-12-17 Kone Elevator Gmbh Procedure and apparatus for detecting objects moving at varying speeds within a certain area
US5444431A (en) * 1992-11-19 1995-08-22 Kenny; Paul M. Intrusion monitoring device
GB2411469A (en) * 2004-02-27 2005-08-31 Optex Co Ltd Passive infrared sensor having sub-mirrors disposed on its corresponding main mirrors
GB2411469B (en) * 2004-02-27 2006-09-13 Optex Co Ltd Passive infrared sensor
US8044336B2 (en) 2005-03-10 2011-10-25 Pyronix Limited Detector and optical system
US8389924B2 (en) 2005-03-10 2013-03-05 Pyronix Limited Detector and optical system
CN112728372A (en) * 2020-12-31 2021-04-30 安徽砺剑防务科技有限公司 Distributed anti-theft alarm device

Also Published As

Publication number Publication date
DE2103909C3 (en) 1983-04-07
FR2080963A1 (en) 1971-11-26
DE2103909B2 (en) 1976-11-25
DE2103909A1 (en) 1971-08-19
FR2080963B1 (en) 1976-03-19

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years