EP0218056B1 - Pyrodetektor zur Detektion eines in seinen Detektionsbereich eintretenden Körpers - Google Patents

Pyrodetektor zur Detektion eines in seinen Detektionsbereich eintretenden Körpers Download PDF

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Publication number
EP0218056B1
EP0218056B1 EP86111437A EP86111437A EP0218056B1 EP 0218056 B1 EP0218056 B1 EP 0218056B1 EP 86111437 A EP86111437 A EP 86111437A EP 86111437 A EP86111437 A EP 86111437A EP 0218056 B1 EP0218056 B1 EP 0218056B1
Authority
EP
European Patent Office
Prior art keywords
concave mirror
pyrodetector
film
sensor elements
circuit board
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
EP86111437A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0218056A1 (de
Inventor
Felix Dipl.-Ing. Pettke
Hans Siwon
Hans Dr. Dipl.-Phys. Meixner
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 AT86111437T priority Critical patent/ATE50374T1/de
Publication of EP0218056A1 publication Critical patent/EP0218056A1/de
Application granted granted Critical
Publication of EP0218056B1 publication Critical patent/EP0218056B1/de
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
    • G08B13/191—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 pyroelectric sensor means
    • 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 a pyrodetector for the detection of a body entering its detection area, which has a temperature deviating from its surroundings, containing a concave mirror for focusing the heat radiation emanating from this body, a first sensor element attached in the focus of the concave mirror, and at least one further sensor element for compensation environmental influences, a film made of one and the same electrically non-conductive material, in particular polyvinylidene difluoride, with the same permanent orientation polarization and electrodes located thereon for the first and the further sensor elements, and this arrangement is fastened in a holder, also containing one for the incident radiation-permeable cover of the mirror cavity and an electronic evaluation device, the film with the sensor elements being arranged in the concave mirror so that the i In the concave mirror, reflected radiation is present on both surface sides of the film, the concave mirror being a parabolic mirror that is dimensioned such that its focus lies in the inner half of the concave mirror, the film with the sensor elements also lying
  • EP-A-0 023 354 A pyrodetector with these features is described in detail in EP-A-0 023 354 with regard to its structural design and in particular its mode of operation.
  • the European patent mentioned corresponds to DE-A-2 930 632 together with DE-A-3 028 252 and US-A-4 404 468.
  • the present invention has for its object to provide an embodiment for the pyrodetector of the type specified, which is particularly space-saving due to a compact design and construction and can therefore have particularly small external dimensions.
  • the ratio between the small axis and the large axis of the body of the concave mirror is preferably in the range from 1: 1.3 to 1: 1.7.
  • Preferred dimensions for the minor axis are 24.0 mm and for the major axis 36.0 mm or for the minor axis 13.6 mm and for the major axis 18 mm.
  • the length of the pyrodetector is 36 mm, measured from the front front given by the honeycomb grid to the outside of the housing base, while in the second case this length is 52 mm, because here the evaluation device can be arranged differently.
  • the two parts of the holder preferably protrude into the cavity of the concave mirror or they are integrated in the two side walls of the concave mirror, which are parallel to the major axis of the body of the concave mirror.
  • the circuit board of the electronic evaluation device is preferably perpendicular to the optical axis of the concave mirror, and the connector pins of the holding frame are fastened in holes in the circuit board. These holes and thus the connector pins are electrical over the printed Lei railways connected with the overall economy.
  • the circuit board of the electronic evaluation device is arranged in the direction of the optical axis and parallel to the major axis of the concave mirror, and if the connector pins are mechanically connected to the circuit board and to the overall circuit via the printed conductor tracks.
  • the circuit board can preferably be arranged perpendicular to the plane of the film with the sensor elements.
  • the body of the concave mirror is preferably made of plastic and is mirrored at least on the surface of its cavity by a metal coating forming the reflector part.
  • At least the housing consists of electrically conductive plastic, but the body of the concave mirror can also consist of electrically conductive plastic.
  • the housing can be made of metal.
  • the shielding against external interference is completed if the honeycomb grille itself contains a metal coating or is also made of conductive plastic or metal. This is explained in detail in the European patent mentioned at the beginning.
  • the invention ensures a particularly space-saving possibility of constructing a pyrodetector since external dimensions can be achieved which are at least five to ten times smaller than previously known pyrodetectors.
  • the concave mirror 1 consists of a body 25 which has a rectangular cross section with a large axis 16 and a small axis 17.
  • the concave mirror 1 contains a reflector part 26 which is curved to form a curved surface 18 in two planes.
  • the hollow spine 1 also contains perpendicular side walls 27 and 28, the side walls 27 being arranged parallel to the minor axis 17 and the side walls 28 being arranged parallel to the major axis 16.
  • the concave mirror 1 contains barbs 8 on its front part (left in FIG. 1), behind which the honeycomb grid 7 is fastened by barbs 9.
  • a cover 5 made of a polyethylene film is stretched over the honeycomb grid 7.
  • the concave mirror 1 has an opening 15 in the optical axis 6 - 6, from which the two parts of the holder 12 protrude into the cavity of the concave mirror 1. These two parts are U-shaped.
  • a holding frame 14 is inserted through the opening 15 and carries the film 13 with the sensor elements 2, 3 and 4.
  • sensor elements 2, 3 and 4 are formed by electrodes, as described in detail, for example, in the aforementioned European patent specification or also in the aforementioned priority German patent application.
  • the two electrodes are separated from one another by a quasi-meandering metal-free strip 30.
  • the sensor element arrangement is connected to the evaluation device 11 via lines which merge into plug pins 22 of the holding frame 14.
  • the electronic evaluation device 11 which, as is known per se in the other context, is preferably provided with a layer of, for example, polyimide, polyethylene terephthalate or zappon lacquer for protection against environmental influences, is held by resilient clamps 24 which are provided with barbs 23.
  • resilient clamps 24 which are provided with barbs 23.
  • spacers 31 which are preferably also integrally connected to the body 25 of the concave mirror 1, as are the resilient clamps 24.
  • the spacers 31 effectively represent an extension of the side walls 28 of the body 25.
  • the length of the spacers 31 is dimensioned such that active and passive electrical components located on the circuit board 19, which are not shown here for reasons of clarity, between the board 19 and the reflector part 26 ha sufficient space ben if the printed conductor tracks are present on the side of the board 19 facing away from the reflector part 26.
  • FIG. 8, 9 and 10 show another embodiment of the pyrodetector, in which the circuit board 19 of the evaluation device 11 is arranged in the direction of the optical axis 6 - 6 and parallel to the major axis 16. Active and passive electrical components are shown on the side of the circuit board 19 that is visible in plan view, which ensure the functioning of the evaluation device 11 by means of appropriate circuitry, namely in that a corresponding signal is generated from the respective detection situation, which signal is then sent to a switch to be actuated, for example is passed on via the connection contacts 32.
  • the opening 15 has a corresponding width which almost - except for the wall thicknesses - extends to the side walls 28.
  • the plane of the board 19 of the evaluation device 11 is perpendicular to the plane of the film 13, so that it is necessary to deform the connector pins 22 accordingly.
  • FIG. 10 shows the housing 10 with the honeycomb grating 7 mounted in front thereof and a dashed side view of the pyrodetector according to arrow C in FIG. 8.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Burglar Alarm Systems (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Radiation Pyrometers (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
EP86111437A 1985-09-11 1986-08-19 Pyrodetektor zur Detektion eines in seinen Detektionsbereich eintretenden Körpers Expired - Lifetime EP0218056B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86111437T ATE50374T1 (de) 1985-09-11 1986-08-19 Pyrodetektor zur detektion eines in seinen detektionsbereich eintretenden koerpers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3532476 1985-09-11
DE19853532476 DE3532476A1 (de) 1985-09-11 1985-09-11 Pyrodetektor zur detektion eines in seinen detektionsbereich eintretenden koerpers

Publications (2)

Publication Number Publication Date
EP0218056A1 EP0218056A1 (de) 1987-04-15
EP0218056B1 true EP0218056B1 (de) 1990-02-07

Family

ID=6280719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111437A Expired - Lifetime EP0218056B1 (de) 1985-09-11 1986-08-19 Pyrodetektor zur Detektion eines in seinen Detektionsbereich eintretenden Körpers

Country Status (7)

Country Link
US (1) US4716294A (es)
EP (1) EP0218056B1 (es)
JP (1) JPS6262235A (es)
AT (1) ATE50374T1 (es)
CA (1) CA1261025A (es)
DE (2) DE3532476A1 (es)
ES (1) ES2002319A6 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616374A1 (de) * 1986-05-15 1987-11-19 Siemens Ag Pyrodetektor, vorzugsweise geeignet fuer bewegungs- und richtungsselektives detektieren
EP0270331B1 (en) * 1986-12-01 1995-05-03 LEGRAND ELECTRIC LIMITED (Reg. no. 2769820) Occupancy detectors etc.
GB2213927A (en) * 1987-12-18 1989-08-23 Philips Electronic Associated Pyroelectric infrared sensors
US5209570A (en) * 1989-05-30 1993-05-11 Deutsche Forschungsanstalt Fur Luft- Und Raumfahrt E.V. Device for measuring the radiation temperature of a melt in vacuum
US5525802A (en) * 1994-08-09 1996-06-11 Texas Instruments Incorporated Low cost infrared window and method of manufacture
DE202006008329U1 (de) * 2006-03-30 2006-08-10 Leica Microsystems Nussloch Gmbh Mikrotom
AT509515B1 (de) 2010-06-23 2012-10-15 Chemiefaser Lenzing Ag Verwendung von cellulose in tabletten

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2152372C3 (de) * 1971-10-21 1978-05-18 Atmos Fritzsching & Co. Gmbh Zweigniederlassung Lenzkirch Im Schwarzwald, 7825 Lenzkirch Teilstrahlungsbolometer
CH596620A5 (es) * 1976-06-21 1978-03-15 Cerberus Ag
DE2930632C2 (de) * 1979-07-27 1982-03-11 Siemens AG, 1000 Berlin und 8000 München Pyrodetektor
DE3028252A1 (de) * 1979-07-27 1982-03-04 Siemens AG, 1000 Berlin und 8000 München Verbesserung eines pyrodetektors
US4379971A (en) * 1980-11-10 1983-04-12 Statitrol, Inc. Pyroelectric sensor
JPS57104826A (en) * 1980-12-20 1982-06-30 Horiba Ltd Condensing type compound infrared rays detector
US4447726A (en) * 1982-04-16 1984-05-08 Cerberus Ag Passive infrared intrusion detector
US4486661A (en) * 1982-06-21 1984-12-04 American District Telegraph Company Wall mountable modular snap-together passive infrared detector assembly
JPS6047977A (ja) * 1983-08-26 1985-03-15 Matsushita Electric Works Ltd 赤外線人体検知装置
GB2150747B (en) * 1983-12-02 1987-04-23 Philips Electronic Associated Pyroelectric infra-red radiation detector

Also Published As

Publication number Publication date
US4716294A (en) 1987-12-29
ATE50374T1 (de) 1990-02-15
DE3669001D1 (de) 1990-03-15
CA1261025A (en) 1989-09-26
DE3532476A1 (de) 1987-03-19
EP0218056A1 (de) 1987-04-15
JPS6262235A (ja) 1987-03-18
ES2002319A6 (es) 1988-08-01

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