EP1089244A1 - Disposition de miroirs dans un capteur passif d'infrarouge - Google Patents

Disposition de miroirs dans un capteur passif d'infrarouge Download PDF

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Publication number
EP1089244A1
EP1089244A1 EP00111473A EP00111473A EP1089244A1 EP 1089244 A1 EP1089244 A1 EP 1089244A1 EP 00111473 A EP00111473 A EP 00111473A EP 00111473 A EP00111473 A EP 00111473A EP 1089244 A1 EP1089244 A1 EP 1089244A1
Authority
EP
European Patent Office
Prior art keywords
mirror arrangement
reflector
detector
arrangement according
reflectors
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.)
Granted
Application number
EP00111473A
Other languages
German (de)
English (en)
Other versions
EP1089244B1 (fr
Inventor
Kurt Dr. Müller
René Lange
Martin Dr. Allemann
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.)
Siemens Building Technologies AG
Original Assignee
Siemens Building Technologies AG
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
Priority claimed from EP99119496A external-priority patent/EP1089245B1/fr
Application filed by Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to EP20000111473 priority Critical patent/EP1089244B1/fr
Publication of EP1089244A1 publication Critical patent/EP1089244A1/fr
Application granted granted Critical
Publication of EP1089244B1 publication Critical patent/EP1089244B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G08B13/193—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 using focusing means

Definitions

  • the present invention relates to a mirror arrangement for passive infrared detectors for monitoring elongated rooms, with several reflectors to bundle the one from a surveillance room heat rays falling on the detector are arranged on one arranged in the detector Sensor, with each reflector a monitoring area at a certain radial distance is assigned by the mirror arrangement and thus by the detector and the monitoring areas cover the interstitial space in a vertical direction.
  • the mirror arrangement 1 shown in FIG. 1 is a further development of that in EP-A-0 361 224 described mirror, through which this is improved so that it on the one hand immune to pets in its effective range and, on the other hand, less expensive to manufacture and is waiting.
  • a Fresnel lens arrangement can also be used instead of the mirror arrangement 1 are used, in which the individual Fresnel lenses in Partial lenses are divided, so that there is also a vertical split of the monitoring areas would result in subzones.
  • each reflector A, B, C, D forms a continuous, coherent surface, this can be for its own Manufacturing required injection molding tool can be made in one piece. In practice this injection molding tool is milled from a single workpiece. In contrast to the mirror arrangement described in EP-A-0 361 224, in which the 11 reflectors 11 Tool inserts are required, only 4 tool inserts are left for the mirror arrangement 1 required and you still get 14 subzones, 14 monitoring areas. The individual segments and subzones are weighted in this way, i.e. their optical The aperture and / or its area are selected so that they are transverse to the overlap pattern (Fig. 3) moving dog generates a signal for a distance from the dog to the detector is the same from about 5 meters.
  • the reflectors C and D for the near and the look-down zone are relatively bright to prevent that a fast-moving intruder has a relatively high-mounted detector (mounting height > 3m) in the close range. This would be the case with a high-mounted detector Cross only a few subzones, possibly only one, and therefore only a relatively small one Generate signal, which is compensated by the increased light intensity.
  • a detector with bright light Reflectors C and D for the near and the look-down zone is at a mounting height between about 1.6 and 4 meters for people absolutely reliable detection.
  • FIG. 3 shows the coverage pattern of the mirror arrangement 1 (FIG. 1) in a vertical section in its elevation plane, the course of the heat radiation from the individual subzones in the monitoring room to the mirror arrangement 1 being shown.
  • the subzones are identified by reference numerals A ' 1 to A' 5 for the far zone, B ' 1 to B' 3 , for the middle zone, C ' 1 to C' 4 for the near zone and D ' 1 and D' 2 for the look -down zone.
  • the subzones are stacked on top of one another. They touch each other, but at most overlap very little so that no areas of greater sensitivity arise.
  • each pair of sensor elements forms a channel, the two channels effectively corresponding to a vertical split of the monitoring areas. From these two channels "the lower one looks into the ground at a distance of about 20 m from the detector, so that the range is limited if a signal is requested in both channels for an alarm. On the other hand, even a large dog in the upper channel will never receive a signal above the detection threshold can deliver, so that even large dogs outside the detector effective range can not trigger a false alarm.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
EP20000111473 1999-10-01 2000-05-29 Disposition de miroirs dans un capteur passif d'infrarouge Expired - Lifetime EP1089244B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20000111473 EP1089244B1 (fr) 1999-10-01 2000-05-29 Disposition de miroirs dans un capteur passif d'infrarouge

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP99119496 1999-10-01
EP99119496A EP1089245B1 (fr) 1999-10-01 1999-10-01 Détecteur infrarouge passif
EP20000111473 EP1089244B1 (fr) 1999-10-01 2000-05-29 Disposition de miroirs dans un capteur passif d'infrarouge

Publications (2)

Publication Number Publication Date
EP1089244A1 true EP1089244A1 (fr) 2001-04-04
EP1089244B1 EP1089244B1 (fr) 2004-03-31

Family

ID=26070997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000111473 Expired - Lifetime EP1089244B1 (fr) 1999-10-01 2000-05-29 Disposition de miroirs dans un capteur passif d'infrarouge

Country Status (1)

Country Link
EP (1) EP1089244B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112529A1 (de) * 1981-03-30 1982-11-11 Fritz Fuss Kg, 7470 Albstadt Spiegelanordnung fuer eine meldeeinrichtung
US4990783A (en) * 1988-09-22 1991-02-05 Cerberus A.G. Range insensitive infrared intrusion detector
US5187360A (en) * 1990-11-30 1993-02-16 Combined Optical Industries Limited Aspheric lens having a plurality of lenslets disposed substantially contiguously in an array
US5923250A (en) * 1997-01-27 1999-07-13 Digital Security Controls Ltd. Size discriminating dual element PIR detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112529A1 (de) * 1981-03-30 1982-11-11 Fritz Fuss Kg, 7470 Albstadt Spiegelanordnung fuer eine meldeeinrichtung
US4990783A (en) * 1988-09-22 1991-02-05 Cerberus A.G. Range insensitive infrared intrusion detector
US5187360A (en) * 1990-11-30 1993-02-16 Combined Optical Industries Limited Aspheric lens having a plurality of lenslets disposed substantially contiguously in an array
US5923250A (en) * 1997-01-27 1999-07-13 Digital Security Controls Ltd. Size discriminating dual element PIR detector

Also Published As

Publication number Publication date
EP1089244B1 (fr) 2004-03-31

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