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EP0617389B1 - Détecteur d'intrusion - Google Patents

Détecteur d'intrusion Download PDF

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Publication number
EP0617389B1
EP0617389B1 EP94104158A EP94104158A EP0617389B1 EP 0617389 B1 EP0617389 B1 EP 0617389B1 EP 94104158 A EP94104158 A EP 94104158A EP 94104158 A EP94104158 A EP 94104158A EP 0617389 B1 EP0617389 B1 EP 0617389B1
Authority
EP
European Patent Office
Prior art keywords
infrared
radiation
micrometres
wavelength range
mirror surfaces
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 - Lifetime
Application number
EP94104158A
Other languages
German (de)
English (en)
Other versions
EP0617389A1 (fr
Inventor
Kurt Mueller
Martin Allemann
René Lange
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.)
Cerberus AG
Original Assignee
Cerberus 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 Cerberus AG filed Critical Cerberus AG
Publication of EP0617389A1 publication Critical patent/EP0617389A1/fr
Application granted granted Critical
Publication of EP0617389B1 publication Critical patent/EP0617389B1/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S250/00—Radiant energy
    • Y10S250/01—Passive intrusion detectors

Definitions

  • the invention relates to an infrared intrusion detector according to the preamble of patent claim 1.
  • Infrared intrusion detectors are well known; they are used to detect movements of people and objects within a given space by the infrared radiation emanating from them is detected.
  • Such infrared intrusion detectors contain one or more infrared sensitive sensors, each with two or more pyroelectric sensor elements, which change when the incident infrared radiation changes give an electrical signal.
  • the infrared radiation from the room to be monitored enters through Infrared-transparent entry window into the detector housing and is focused by optical Elements focused on the infrared sensor elements.
  • These optical elements are generally made of several concave mirrors or a number of Fresnel lenses, which on Entry windows are attached. As a rule, the sensor elements are switched in pairs in order to the thermal effects of air currents which sweep over the sensors or the entrance window, to compensate.
  • infrared intrusion detectors To the infrared radiation emanating from warm bodies from the radiation of other optical To distinguish wavelength ranges, i.e. from stray light (such as the light from Car headlights), and thus to prevent false alarms of the detector, infrared intrusion detectors are included various optical filters.
  • the insensitivity of an infrared intrusion detector Incident light is also from official inspection authorities such as the Association of property insurers in the Federal Republic of Germany.
  • An entry window of an infrared intrusion detector is mentioned here, which also acts as an infrared filter serves.
  • This infrared filter consists of a polyethylene film in which zinc sulfide particles with a Particle sizes of 0.5 to 50 microns are evenly distributed.
  • This filter has a high optical Transmission in the wavelength range from 4 to 15 micrometers.
  • the stray light in the visible and nearby The infrared range is scattered on the zinc sulfide particles, so that it is only in a low intensity on the Infrared sensor elements falls.
  • these infrared intrusion detectors that through Secondary radiation, which emanates from filters or protective windows on the sensor housing, or also through Thermal conduction from the sensor housing to the sensor elements triggers false alarms.
  • the object of the invention is to overcome the above-mentioned disadvantages of infrared intrusion detectors avoid and create a detector that optimizes increased false alarm security through a Noise immunity.
  • the intensity of the radiation in the useful band (6-15 micrometers Wavelength) which falls on the infrared sensor elements, in an enlarged ratio to the intensity of the stray light falling on the sensor elements.
  • Next are said to be through secondary radiation as well False signals caused by heat conduction can be reduced.
  • the infrared intrusion detector according to the invention has an am to filter out the stray light Detector housing attached entry window, which allows the stray light to pass through reduced, and a optical transmission filter, which is attached to the sensor housing.
  • the spectral transmission of a Entry window and an optical transmission filter are shown in Fig. 1 and are marked with (E) or (OT) marked.
  • the infrared intrusion detector has Mirror surfaces that focus the radiation in the useful band on the sensor elements, but at the same time also serve as diffusers in the area of the stray light. This spread causes a reduction the intensity of the stray light that falls on the filter and the sensor housing, and thus also one Reduction of the heat conduction and secondary radiation emanating from them.
  • the surface of the focusing mirror surfaces has a roughness, the structure sizes of which distributed that it causes infrared red selectivity.
  • the infrared radiation is in the wavelength range specularly reflected from 6 to 15 micrometers according to the geometric optical function of the mirror, respectively focused; the radiation in the visible and near infrared range up to 3 micrometers, that is Stray light, on the other hand, is diffusely scattered.
  • a typical specular reflection of a mirror surface with a rough one Surface is based on the example of an ELAMET layer from the Deutschen für heatntechnik mbH in Dependence of the wavelength of the incident radiation in, marked with SR, Fig. 1 shown.
  • the stray light diffusely scattered on the rough mirror surfaces strikes the optical at low intensity Transmission filter so that the secondary radiation resulting from the absorption of the stray light is strong is reduced. If some secondary radiation is emitted anyway, it strikes with a more uniform one Intensity distribution on the sensor elements, since the stray light also has a uniform intensity distribution hits the filter. The resulting difference signal of the two sensor elements is then almost the same Zero.
  • the sensor elements are heated by heat conduction from the sensor housing also equally, so that the signals caused by the heating on both sensor elements equivalent and these are compensated for by the differential circuit of the sensor elements.
  • the surface structure of the focusing mirror is preferably such that the specular Reflectivity at wavelengths below 3 micrometers is significantly less than 50% and at wavelengths between 6 and 15 micrometers is more than 80%.
  • the preferred mirror materials are on Plastic-coated layers of aluminum, nickel or chrome.
  • a random surface structure can be created by various methods.
  • One method is the treatment of injection molding tools by etching, in which the steel matrix is approximately one micrometer is etched away.
  • ABS acrylonitrile-butadiene-styrene copolymer
  • the resulting rough textured surface is then electroplated or coated with a metal layer.
  • Evaporation replicates the etched surface accurately, in the case of galvanic application, the Surface structure slightly leveled again.
  • Another method of producing randomly structured surfaces is pearlescent chrome plating according to standard process.
  • the production is also by vapor deposition with aluminum at a rapid vapor deposition rate possible, as practiced by the Deutschen fürmaschinentechnik mbH.
  • the resulting Surface structure has the desired spectral property.
  • Another embodiment consists of a mirror which is randomly rough instead of one Surface structure has a regular structure.
  • a regular structure is one for the spraying process certain use of tools according to the photolithographic method and a laser beam writing process created a regular structure.
  • This structure is then sputtered with nickel or chrome. in the Injection mold is used to replicate the regular structure in the injection molding process.

Landscapes

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

Claims (7)

  1. Détecteur d'intrusion à infrarouge, constitué d'un boítier non transparent au rayonnement, comportant une fenêtre d'entrée transparente au rayonnement et au moins un capteur d'infrarouge qui est monté dans le boítier, qui comporte au moins deux éléments capteurs pyroélectriques, sensibles au rayonnement, au-dessus duquel est monté un filtre optique transparent au rayonnement infrarouge et sur lequel le rayonnement provenant de la zone à surveiller est concentré sur les éléments capteurs par plusieurs surfaces réfléchissantes, caractérisé en ce que les surfaces réfléchissantes de concentration ont une rugosité de surface telle que le rayonnement dans le domaine de longueur d'onde de 6 à 15 micromètres est concentré par les surfaces réfléchissantes sur les éléments capteurs d'infrarouge et que le rayonnement ayant des longueurs d'onde inférieure à 3 micromètres est dispersé de manière diffuse par les surfaces réfléchissantes.
  2. Détecteur d'intrusion à infrarouge suivant la revendication 1, caractérisé en ce que les surfaces réfléchissantes de concentration ont une rugosité de surface telle que la réflexion spéculaire dans le domaine de longueur d'onde de 6 à 15 micromètres est supérieure à 50% et inférieure à 90% dans le domaine de longueur d'onde allant de 0,4 à 3 micromètre.
  3. Détecteur d'intrusion à infrarouge suivant les revendications 1 et 2 , caractérisé en ce que le rapport du coefficient de réflexion spéculaire dans le domaine de longueur d'onde de 6 à 15 micromètre au coefficient de réflexion spéculaire dans le domaine de longueur d'onde de 0,4 à 3 micromètre est supérieure à 1, 1.
  4. Détecteur d'intrusion à infrarouge suivant les revendications 1 et 2, caractérisé en ce que les surfaces réfléchissantes de concentration ont une structure de surface uniforme.
  5. Détecteur d'intrusion à infrarouge suivant l'une des revendications 1 à 4, caractérisé en ce que la structure de surface uniforme a été produite par un procédé directe de gravure au rayon laser sur un outil de moulage par injection prévu pour la fabrication du miroir.
  6. Détecteur d'intrusion à infrarouge suivant l'une des revendications 1 à 5, caractérisé en ce que les surfaces réfléchissantes sont en aluminium, en nickel ou en chrome.
  7. Détecteur d'intrusion à infrarouge suivant la revendication 1, caractérisé en ce que la fenêtre d'entrée transparente au rayonnement a sur au moins l'une de ces surfaces une rugosité de surface telle que le rayonnement dans le domaine de longueur d'onde de 6 à 15 micromètres passe sans être gêné et que le rayonnement dans le domaine de longueur d'onde de 0,4 à 3 micromètres est dispersé de manière diffuse sur la surface rugueuse.
EP94104158A 1993-03-26 1994-03-17 Détecteur d'intrusion Expired - Lifetime EP0617389B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH936/93A CH684717A5 (de) 1993-03-26 1993-03-26 Infraroteindringdetektor.
CH936/93 1993-03-26

Publications (2)

Publication Number Publication Date
EP0617389A1 EP0617389A1 (fr) 1994-09-28
EP0617389B1 true EP0617389B1 (fr) 1998-05-27

Family

ID=4198628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104158A Expired - Lifetime EP0617389B1 (fr) 1993-03-26 1994-03-17 Détecteur d'intrusion

Country Status (5)

Country Link
US (1) US5424718A (fr)
EP (1) EP0617389B1 (fr)
AT (1) ATE166737T1 (fr)
CH (1) CH684717A5 (fr)
DE (1) DE59406066D1 (fr)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430778C2 (de) * 1994-08-30 2000-01-27 Sick Ag Tubus
EP0707294A1 (fr) * 1994-10-10 1996-04-17 Cerberus Ag Miroir pour un détecteur d'intrusion à infrarouge et détecteur d'intrusion à infrarouge avec un agencement de miroirs
US5554068A (en) * 1994-12-13 1996-09-10 Minnesota Mining And Manufacturing Company Abrasive flap brush and method and apparatus for making same
DE19502521A1 (de) * 1995-01-27 1996-08-01 Abb Patent Gmbh Passiv-Infrarot-Melder mit einer Optik, die von einem Strahlungsobjekt emittierte Wärmestrahlung auf einen Infrarotsensor fokussiert
IL119372A (en) * 1995-11-03 2000-02-17 Siemens Building Tech Ag Passive infrared intruder detector
US6166625A (en) 1996-09-26 2000-12-26 Donnelly Corporation Pyroelectric intrusion detection in motor vehicles
US6121876A (en) * 1998-03-24 2000-09-19 C & K Systems, Inc. System for absorbing and or scattering superfluous radiation in an optical motion sensor
CA2236813C (fr) * 1997-11-25 2005-12-27 C & K Systems, Inc. Systeme pour l'absorption et/ou la dispersion de l'irradiation superflue dans un capteur de mouvement optique
US6783167B2 (en) 1999-03-24 2004-08-31 Donnelly Corporation Safety system for a closed compartment of a vehicle
US6086131A (en) * 1999-03-24 2000-07-11 Donnelly Corporation Safety handle for trunk of vehicle
US6485081B1 (en) 1999-03-24 2002-11-26 Donnelly Corporation Safety system for a closed compartment of a vehicle
US6390529B1 (en) 1999-03-24 2002-05-21 Donnelly Corporation Safety release for a trunk of a vehicle
WO2002047942A2 (fr) 2000-11-16 2002-06-20 Donnelly Corporation Systeme de detection d'occupation d'un compartiment de vehicule
NL1019039C2 (nl) * 2001-09-26 2003-03-27 Interlogix B V Bewakingsdetector.
US7079028B2 (en) * 2004-03-11 2006-07-18 Robert Bosch Gmbh Modular intrusion detection system
US7218222B2 (en) * 2004-08-18 2007-05-15 Honeywell International, Inc. MEMS based space safety infrared sensor apparatus and method for detecting a gas or vapor
US7145455B2 (en) * 2004-08-18 2006-12-05 Honeywell International, Inc. MEMS based space safety infrared sensor apparatus and method
WO2006058098A2 (fr) 2004-11-22 2006-06-01 Donnelly Corporation Systeme de detection de l'occupant pour vehicule
US9189934B2 (en) 2005-09-22 2015-11-17 Rsi Video Technologies, Inc. Security monitoring with programmable mapping
JP4699285B2 (ja) 2006-05-29 2011-06-08 株式会社 長谷川電気工業所 空調設備における冷温水ポンプの運転制御方法
GB2453484B (en) * 2006-07-27 2009-12-02 Visonic Ltd Passive infrared detectors
US7876056B2 (en) 2007-02-16 2011-01-25 Heathco Llc Multiple sensor variable illumination level lighting system
US7750804B2 (en) * 2007-02-16 2010-07-06 Heathco Llc Multiple sensor lighting system
EP2017526A1 (fr) * 2007-06-13 2009-01-21 Royal College Of Art Eclairage orientable
US20090020703A1 (en) * 2007-07-17 2009-01-22 Honeywell International, Inc Optical filter for improved white light immunity in an intrusion detector
US20090179759A1 (en) * 2008-01-11 2009-07-16 Koury Richard H Animal deterrent system
US9449504B2 (en) 2013-03-21 2016-09-20 Microsoft Technology Licensing, Llc Code sequence control of infrared blaster
USD711272S1 (en) 2013-04-09 2014-08-19 Rsi Video Technologies, Inc. Mountable security detector
US9472067B1 (en) 2013-07-23 2016-10-18 Rsi Video Technologies, Inc. Security devices and related features
WO2015070223A1 (fr) * 2013-11-11 2015-05-14 General Electric Company Capteur de gaz optique
US9804084B2 (en) 2013-11-11 2017-10-31 Amphenol Thermometrics, Inc. Optical gas sensor
CN104627030A (zh) 2013-11-13 2015-05-20 光宝科技股份有限公司 载具安全系统及应用于其上的安全侦测与处理方法
US9405120B2 (en) 2014-11-19 2016-08-02 Magna Electronics Solutions Gmbh Head-up display and vehicle using the same
EP3078951A1 (fr) * 2015-04-10 2016-10-12 Silverlight AG Dispositif doté de capteur pir
CN118318259A (zh) * 2022-01-17 2024-07-09 简化安全有限公司 动作检测

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703718A (en) * 1971-01-07 1972-11-21 Optical Coating Laboratory Inc Infrared intrusion detector system
US4342987A (en) * 1979-09-10 1982-08-03 Rossin Corporation Intruder detection system
DE2937923C2 (de) * 1979-09-19 1984-05-24 Heimann Gmbh, 6200 Wiesbaden Anordnung zum Verhindern von Fehlalarmen eines passiven Infrarot-Bewegungsmelders
US4321594A (en) * 1979-11-01 1982-03-23 American District Telegraph Company Passive infrared detector
US5055685A (en) * 1989-12-01 1991-10-08 Optex Co., Ltd. Infrared detecting apparatus
CH680687A5 (fr) * 1990-01-26 1992-10-15 Cerberus Ag

Also Published As

Publication number Publication date
DE59406066D1 (de) 1998-07-02
US5424718A (en) 1995-06-13
ATE166737T1 (de) 1998-06-15
EP0617389A1 (fr) 1994-09-28
CH684717A5 (de) 1994-11-30

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