EP1612750B1 - Détecteur passif d'infrarouges - Google Patents

Détecteur passif d'infrarouges Download PDF

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Publication number
EP1612750B1
EP1612750B1 EP04015646A EP04015646A EP1612750B1 EP 1612750 B1 EP1612750 B1 EP 1612750B1 EP 04015646 A EP04015646 A EP 04015646A EP 04015646 A EP04015646 A EP 04015646A EP 1612750 B1 EP1612750 B1 EP 1612750B1
Authority
EP
European Patent Office
Prior art keywords
additional part
reflectors
mirror
sensor
reflector row
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.)
Not-in-force
Application number
EP04015646A
Other languages
German (de)
English (en)
Other versions
EP1612750A1 (fr
Inventor
Martin Dr. Allemann
Kurt Dr. Müller
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 AG
Original Assignee
Siemens 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
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP04015646A priority Critical patent/EP1612750B1/fr
Priority to AT04015646T priority patent/ATE414965T1/de
Priority to DE502004008486T priority patent/DE502004008486D1/de
Publication of EP1612750A1 publication Critical patent/EP1612750A1/fr
Application granted granted Critical
Publication of EP1612750B1 publication Critical patent/EP1612750B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 passive infrared detector with a heat-sensitive sensor and a mirror for bundling the falling from the interstitial space on the detector heat radiation to the sensor, wherein the mirror of reflectors existing reflector rows for monitoring areas with different location in the interstitial space and for a distinction between Man and animal is formed on the basis of the amplitude of the sensor signal.
  • Passive infrared detectors of this type are mainly used in the private sector and meet a market need there, because they largely suppress an alarm triggered by pets.
  • the latter is commonly referred to as "pet immunity”.
  • This can be achieved, in particular, with special optics which, together with the heat-sensitive sensor, prefer vertical objects, ie upright people, to horizontal objects, that is to say, pets running or crawling on the ground.
  • detector families consisting of a plurality of detectors for different applications are preferably offered today, which preferably all use the same optics, the optics here meaning the mirror or possibly a Fresnel lens arrangement. See for example the EP-A-1 089 245 ,
  • a passive infrared detector of the type mentioned with pet immunity should be specified, which can be made awakecreechicher with little effort.
  • an attachable to the mirror and selected reflectors or at least one reflector row covering additional part which has on its side facing the sensor an imaging optics with a different characteristic than the covered reflectors.
  • a first preferred embodiment of the detector according to the invention is characterized in that said additional part is formed by a plastic part in the manner of a clip.
  • the plastic part of dark-colored acrylonitrile-butadiene-styrene polymer (ABS).
  • a second preferred embodiment of the detector according to the invention is characterized in that the additional part is designed as an elastic clamping element.
  • a third preferred embodiment of the detector according to the invention in which the reflectors of at least one row of reflectors consist of a number of subelements, so that the monitoring areas of these at least one row of reflectors are vertically split into stacked subzones of slightly different elevation, characterized in that said Additional part for the cover of the at least one row of reflectors is provided and has on its side facing the sensor depending on a single, continuously curved surface existing reflectors.
  • the additional part can have on its side facing the sensor a refractive-optical relief structure on which the incident radiation experiences an additional refraction.
  • a fourth preferred embodiment is characterized in that the mirror and the additional part in shape and size are coordinated so that the additional part on the mirror can be fastened only in such a position that it completely covers the desired reflectors or the desired at least one row of reflectors ,
  • the erfindungsmässe detector has the advantage that it can be easily and inexpensively adapted to different applications by the additional part, in particular can be made hypocritical.
  • the latter is achieved by covering reflector rows of the mirror for certain zones, for example the reflector row for the near zone and / or middle zone, with the additional part, whereby the PET immunity is omitted for these zones, but the detector also crawls on the floor, cowering or lying on a skateboard people appeals.
  • the elimination of PET immunity is not serious, because in high-security rooms usually no pets are kept.
  • the trained as an elastic clamping element attachment can be plugged with a simple handle on the mirror. You can attach the additional part of the detector as an accessory, so that a possible adaptation of the detector can even be made by the customer.
  • the invention further relates to an additional part for the optics of a passive infrared detector, which has a heat-sensitive sensor and a mirror for bundling the falling from the interstitial space on the detector heat radiation to the sensor.
  • This additional part is characterized in that it is placed on the mirror and this at least partially covers in the attached state, and at its the sensor facing side has an imaging optics with a different characteristic than the covered surface of the mirror.
  • the refractive-political relief structure is formed by strips with wedge-shaped cross-section.
  • the additional part is preferably made of polyethylene.
  • a preferred embodiment of the inventive additional part for a passive infrared detector with a mirror which has a first reflector row for a remote zone, a second row of reflectors for a central zone, a third row of reflectors for a near zone and a fourth row of reflectors for a look-down zone whose Reflectors are split into faces, is characterized in that the additional part for the cover of the reflector row for the middle zone and / or the reflector row for the near zone and / or the reflector row is provided for the look-down zone.
  • the in the Figures 1 and 2 illustrated mirror assembly 1 is a further development of in the EP-A-0 303 913 described mirror, by which this level is improved so that it is immune to pets in its effective range.
  • the mirror assembly 1 consists of a number of reflectors, which are designed so that the space to be monitored is fan-shaped covered with outgoing by the detector monitoring areas, wherein corresponding to different distances from the detector more "such fan areas" or surveillance zones are provided.
  • a distinction is made, for example, four monitoring zones, a remote zone, a central zone, a near zone and a so-called look-down zone, which are covered by four rows of reflectors offset in the vertical direction.
  • These rows are in the mirror assembly 1 the row R 1 for the remote zone, the row R 2 for the middle zone, the row R 3 for the near zone and the row R 4 for the look-down zone, the latter row only a single reflector having.
  • the fan-shaped coverage is achieved by mutually displacing the reflectors of each row in the horizontal direction, and to achieve an approximately uniform coverage pattern, the number of reflectors per row increases with the distance of the respective surveillance zone from the detector.
  • Each reflector "looks" into a specific solid angle of a certain zone, receives the heat radiation incident from this solid angle and focuses it onto a heat-sensitive sensor S (FIG. Fig. 2 ), which is formed for example by a pyrosensor.
  • the pyrosensor is preferably a so-called standard dual-pyrosensor, as used for example in the passive infrared detectors of Siemens Building Technologies AG, formerly Cerberus AG (see also EP-A-0 303 913 ).
  • the sensor detects the heat radiation emitted by this object, whereupon the detector emits an alarm signal. This alarm signal indicates that an object, such as an intruder, is in the interstitial space.
  • the reflector row R 1 for the remote zone consists of seven paraboloidal strip-like reflectors 2 to 8, the reflector row R 2 for the central zone of five reflectors 9 to 13, the row of reflectors R 3 for the near zone of three reflectors 14 to 16 and the reflector row R 4 for the near zone of a single reflector 17.
  • This arrangement is identical to that in the EP-A-0 303 913 described.
  • the individual reflectors do not consist of a single, continuously curved surface, but each have a plurality of partial surfaces of different vertical orientation, whereby the associated monitoring areas are correspondingly split into subzones.
  • the transitions between the faces are in the Fig. 1 and 2 indicated by dashed horizontal lines or curves.
  • Fig. 1 it can be seen, consist of the reflectors 2 to 8 for the remote zone and the reflectors 9 to 13 for the central zone of three, the reflectors 14 to 16 for the near zone of four and the reflector 17 for the look-down zone of five faces ,
  • the individual partial surfaces are so weighted, ie their optical aperture and their surface are chosen so that a transversely to the cover pattern moving dog of a certain size (for example haired dog, 80 cm long and 60 cm high) generates a signal for each distance from the dog to the detector is about the same size.
  • a transversely to the cover pattern moving dog of a certain size for example haired dog, 80 cm long and 60 cm high
  • a detector with PET immunity and sub-creep safety in the critical mid zone is characterized by the in Fig. 3 illustrated additional part Z created.
  • the additional part Z is provided for the cover of the reflector row R 2 for the central zone and generally has on its side facing the S an imaging optics with the desired characteristics.
  • the imaging optics having the desired characteristic are formed in that each focusing element of the reflector row R 2 is formed by a single, continuously curved reflector surface 9 ', 10', 11 ', 12' 13 'is formed, which has a constant elevation.
  • the additional part Z consists of black-colored acrylonitrile-butadiene-styrene polymer (ABS), which is the material used for the support layer of the mirror 1. See the EP-A-0 707 294 , Of course, the near zone R 3 could be covered by an additional part of the type shown.
  • the additional part consists of a material permeable to infrared radiation, such as polyethylene, and at its end the sensor S (FIG. Fig. 2 ) facing side has a kind of Fresnel structure.
  • This is to be understood as a refractive optical relief structure at which the incident radiation undergoes an additional refraction.
  • the Fresnel structure consists of strips of wedge-shaped cross section; the radiation passing through these strips is refracted as it enters and exits the strip, resulting in a change in the angle of incidence of the infrared radiation on the additional part Z.
  • This effect can be used to cancel the splitting of the focusing elements of the row of reflectors or rows of reflectors into sub-elements or to deliberately move the monitoring areas of a row of reflectors.
  • the angle of incidence of the infrared radiation impinging on the look-down zone can be made steeper and thereby the surveillance area of the look-down zone lay directly under the detector. Because by the fact that twice the refraction of the angle of incidence of the incident on the detector infrared radiation steepens, the monitoring range of the look-down zone R 4 moves closer to the detector.

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

Claims (12)

  1. Détecteur infrarouge passif comprenant un capteur (S) sensible à la chaleur et un miroir (1) pour la concentration du rayonnement thermique, arrivant de l'espace de surveillance sur le détecteur (S), le miroir (1) présente des rangées de réflecteurs (R1-R4) constituées de réflecteurs (2-17) pour des zones de surveillance avec une position différente dans l'espace de surveillance et étant conçus pour une différenciation entre l'homme et l'animal à l'aide de l'amplitude du signal de capteur, caractérisé par une partie supplémentaire (Z) pouvant être posée sur le miroir (1) et recouvrant des réflecteurs sélectionnés ou au moins une rangée de réflecteurs, laquelle partie supplémentaire présente sur son côté tourné vers le capteur (S) une optique de représentation avec une autre caractéristique que les réflecteurs recouverts.
  2. Détecteur infrarouge passif selon la revendication 1, caractérisé en ce que ladite partie supplémentaire (Z) est formée par une partie plastique à la façon d'un clips.
  3. Détecteur infrarouge passif selon la revendication 2, caractérisé en ce que la partie supplémentaire (Z) est à base de polymérisat d'acrylonitrile-butadiène-styrène (ABS) teinté en sombre.
  4. Détecteur infrarouge passif selon la revendication 2, caractérisé en ce que la partie supplémentaire (Z) est conçue comme une pince élastique.
  5. Détecteur infrarouge passif selon la revendication 2, sur lequel les réflecteurs (9-13) d'au moins une rangée de réflecteurs (R2) sont constitués d'un certain nombre d'éléments partiels, de sorte que les zones de surveillance de cette au moins une rangée de réflecteurs (R2) sont dissociées verticalement en sous-zones empilées les unes sur les autres avec une élévation légèrement différente, caractérisé en ce que ladite partie supplémentaire (Z) est prévue pour le recouvrement de la au moins une rangée de réflecteurs (R2) et présente sur son côté tourné vers le capteur (S) des réflecteurs (9'-10', 11', 12', 13') constitués chacun d'une unique surface toujours incurvée.
  6. Infrarouge passif selon la revendication 2, selon laquelle les réflecteurs (2-8 ; 9-13 ; 14-16 ; 17) comprennent au moins une rangée de réflecteurs (R1, R2, R3, R4) constituée d'un certain nombre d'éléments partiels, de sorte que les zones de surveillance de cette au moins une rangée de réflecteurs (R1, R2, R3, R4) sont dissociées verticalement en sous-zones empilées les unes sur les autres avec une élévation légèrement différente, caractérisé en ce que ladite partie supplémentaire (Z) est prévue pour le recouvrement de la au moins une rangée de réflecteurs et présente sur son côté tourné vers le capteur (S) une structure en relief d'optique de réfraction, sur laquelle le rayonnement arrivant subit une réfraction supplémentaire.
  7. Détecteur infrarouge passif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le miroir (1) et la partie supplémentaire (Z) sont adaptés l'un à l'autre au niveau de la forme et de la grandeur de telle sorte que la partie supplémentaire (Z) peut être fixée sur le miroir (1) uniquement dans une position telle qu'elle recouvre complètement les réflecteurs souhaités ou la rangée de réflecteurs souhaitée au nombre minimum de un.
  8. Partie supplémentaire pour l'optique d'un capteur infrarouge passif selon la revendication 1, qui présente un capteur (S) sensible à la chaleur et un miroir (1) pour la concentration du rayonnement de chaleur, provenant de la zone de surveillance et tombant sur le détecteur sur le capteur (S), caractérisée en ce que la partie supplémentaire (Z) peut être posée sur le miroir (1) et recouvre au moins partiellement celui-ci lorsqu'elle est posée dessus et présente sur son côté tourné vers le capteur (S) une optique de représentation avec une autre surface caractéristique que la surface recouverte du miroir (1).
  9. Partie supplémentaire selon la revendication 8, caractérisée en ce que ladite optique de représentation est formée par des réflecteurs (9', 10', 11', 12', 13') constitués chacun d'une unique surface toujours incurvée ou par une structure en relief d'optique de réfraction.
  10. Partie supplémentaire selon la revendication 9, caractérisée en ce que la structure en relief d'optique de réfraction est formée par des bandes présentant une section cunéiforme.
  11. Partie supplémentaire selon la revendication 10, caractérisée en ce qu'elle est à base de polyéthylène.
  12. Partie supplémentaire selon l'une quelconque des revendications 8 à 11, pour un détecteur infrarouge passif comprenant un miroir (1), qui présente une première rangée de réflecteurs (R1) pour une zone éloignée, une seconde rangée de réflecteurs (R2) pour une zone centrale, une troisième rangée de réflecteurs (R3) pour une zone rapprochée et une quatrième rangée de réflecteurs (R4) pour une zone Look-down, dont les réflecteurs (2-8 ; 9-13 ; 14-16 ; 17) sont dissociés en surfaces partielles, caractérisée en ce que la partie supplémentaire (Z) est prévue pour le recouvrement de la rangée de réflecteurs (R2) pour la zone centrale et/ou de la rangée de réflecteurs (R3) pour la zone rapprochée et/ou de la rangée de réflecteurs (R4) pour la zone Look-down.
EP04015646A 2004-07-02 2004-07-02 Détecteur passif d'infrarouges Not-in-force EP1612750B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04015646A EP1612750B1 (fr) 2004-07-02 2004-07-02 Détecteur passif d'infrarouges
AT04015646T ATE414965T1 (de) 2004-07-02 2004-07-02 Passiv infrarotmelder
DE502004008486T DE502004008486D1 (de) 2004-07-02 2004-07-02 Passiv Infrarotmelder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04015646A EP1612750B1 (fr) 2004-07-02 2004-07-02 Détecteur passif d'infrarouges

Publications (2)

Publication Number Publication Date
EP1612750A1 EP1612750A1 (fr) 2006-01-04
EP1612750B1 true EP1612750B1 (fr) 2008-11-19

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EP04015646A Not-in-force EP1612750B1 (fr) 2004-07-02 2004-07-02 Détecteur passif d'infrarouges

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EP (1) EP1612750B1 (fr)
AT (1) ATE414965T1 (fr)
DE (1) DE502004008486D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2507818B (en) 2012-11-13 2015-09-09 Pyronix Ltd Infrared detection device and masking section
EP2765563A1 (fr) * 2013-02-08 2014-08-13 Siemens AB Détecteur
NL2012327B1 (en) 2013-12-13 2016-06-21 Utc Fire & Security B V Selective intrusion detection systems.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU560866B2 (en) * 1984-09-25 1987-04-16 Matsushita Electric Works Ltd. Passive infrared detector
CH676642A5 (fr) * 1988-09-22 1991-02-15 Cerberus Ag
JP3865516B2 (ja) * 1998-10-23 2007-01-10 ソニー株式会社 全方位撮像装置
US6479823B1 (en) * 1999-08-11 2002-11-12 Hubbell Incorporated Apparatus and method for lens adjustment

Also Published As

Publication number Publication date
ATE414965T1 (de) 2008-12-15
DE502004008486D1 (de) 2009-01-02
EP1612750A1 (fr) 2006-01-04

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