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EP0226694A2 - Procédé et disposition pour surveiller un espace - Google Patents

Procédé et disposition pour surveiller un espace Download PDF

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Publication number
EP0226694A2
EP0226694A2 EP86106425A EP86106425A EP0226694A2 EP 0226694 A2 EP0226694 A2 EP 0226694A2 EP 86106425 A EP86106425 A EP 86106425A EP 86106425 A EP86106425 A EP 86106425A EP 0226694 A2 EP0226694 A2 EP 0226694A2
Authority
EP
European Patent Office
Prior art keywords
radiation
receiver
room
alarm
reference value
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.)
Withdrawn
Application number
EP86106425A
Other languages
German (de)
English (en)
Other versions
EP0226694A3 (fr
Inventor
Hans Dr. Kolb
Harald 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.)
f+g megamos Sicherheitselektronik GmbH
F&G Megamos Sicherheitselektronik GmbH
Original Assignee
f+g megamos Sicherheitselektronik GmbH
F&G Megamos Sicherheitselektronik GmbH
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 f+g megamos Sicherheitselektronik GmbH, F&G Megamos Sicherheitselektronik GmbH filed Critical f+g megamos Sicherheitselektronik GmbH
Publication of EP0226694A2 publication Critical patent/EP0226694A2/fr
Publication of EP0226694A3 publication Critical patent/EP0226694A3/fr
Withdrawn legal-status Critical Current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
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors
    • 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
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/187—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interference of a radiation field

Definitions

  • the invention relates to a method for monitoring a room for determining the penetration of people or objects with radiation of electromagnetic radiation into the room from at least one location, possibly reflecting the radiation at at least one other location, measuring those arriving at another location Radiation and triggering an alarm if the incoming radiation deviates from a setpoint.
  • the invention further relates to an arrangement for performing this method with at least one radiation source, at least one receiver and, if appropriate, at least one reflection surface located in between.
  • An early form of monitoring a room is to monitor it with a light barrier.
  • the light runs in a bundle or as a beam from the light source to the receiver. It is not difficult for a skillful thief to avoid penetrating the light rays. This applies to operation with both visible and invisible light, such as infrared radiation.
  • infrared radiation is radiated unbundled into the room to be monitored.
  • the receiver is located at a location remote from the radiation source. Through reflections on the walls of the room and on the counter in it a certain proportion of the radiation emitted by the source always hits the receiver. This means that practically the entire room is filled with infrared radiation. At every point in the room, a thief penetrating into it enters the radiation.
  • this alarm can also be triggered without the intrusion of a person or an object into the room to be monitored by exposing the room to be monitored to intense radiation from the outside. This triggers a false alarm.
  • the invention has for its object to provide a method and an arrangement for monitoring a room so that the above-mentioned false alarm no longer occurs.
  • the system should have a high sensitivity, false alarms should be practically excluded and even a physically and practically highly experienced thief should not be able to outsmart the system.
  • the solution to this problem is achieved according to the invention in that an electromagnetic wave field with a spatial structuring of the intensity and / or frequency is emitted into the room, this radiation immediately or after at least one reflection at the passed further to a receiver, a relative intensity minimum and a relative intensity maximum determined at the receiver, the difference of which is formed, stored as a reference value and the alarm is triggered if the instantaneous difference deviates from the reference value by more than a desired value.
  • the minimum and maximum intensity are determined at different frequencies.
  • the radiation arriving at the further point is measured there at several neighboring points and from these measurements maxima and minima be averaged. This makes you independent of coincidences.
  • the reference value is formed as the mean value from the differences between a plurality of maxima and minima determined in succession. This also makes you independent of coincidences.
  • An increase or decrease in the temperature in the room to be monitored means a slight change in the geometric dimensions of the outer surfaces. This could lead to a felative change in the situation between source and recipient.
  • the light reflected on the other point is measured periodically at several neighboring points and an alarm is suppressed when the maximum or minimum shift synchronously from one point to an adjacent point.
  • the thief will, for example, push a window in, move objects and / or make other changes in the room.
  • distances and angles are changed and shading is carried out.
  • the true reference value after a break-in will thus differ from the reference value stored before the break-in. In a further embodiment it is therefore provided that the reference value is newly formed and stored after each alarm is triggered.
  • the method according to the invention can be used in rooms of various types. It can be used to monitor living and office spaces. The monitored room need not be closed. It can also be used to monitor aisles, halls, gate entrances, etc. It is only necessary to monitor the side or end of a room through which the thief will enter the room. However, the method according to the invention is to be used in particular for monitoring the interior of motor vehicles. Depending on the desired level of perfection, it is sufficient to monitor the driver's side or both sides of the interior, since it can be assumed that the thief enters the interior via a door or a side window. At the same time, the front and rear windows are secured because the radiation is reflected on them.
  • the invention works with spatially intensity and / or frequency modulated, single or multi-colored light or other electromagnetic radiation in the wavelength range from 200 nm to 50 ⁇ m.
  • each receiver contains a plurality of diodes arranged in close proximity to one another and an intelligent electronics connected to them, and a structure generating a spatial intensity or frequency pattern of the radiation is arranged in the radiation path of the radiation source and the receiver lies in the radiation path of the direct radiation or the radiation reflected by this structure.
  • the structure can lie directly behind the radiation source in the radiation path. It can also form a reflective surface.
  • the structure itself is a film that is transparent in the visible optical range with location-dependent reflection or transmission properties.
  • a practical configuration for monitoring, for example a vehicle interior consists of; that a dashed line grid is projected from a radiation source as a slide onto the side areas of the windshield. Part of the incident radiation is reflected on the glass surfaces.
  • the radiation source can be placed relative to the windshield so that the reflection creates a radiation or light curtain in front of the side windows, which has the above-mentioned structure, a dashed line pattern, and which in turn is reflected on the rear window to the parcel shelf.
  • the beam path can also run in the opposite direction.
  • a light-dark grid includes.
  • the intensity ratio of the light-dark grid can be determined with suitable electronics, stored and queried in predeterminable cycle times and compared with the earlier values.
  • an alarm is triggered; that is, when the difference between intensity minimum and maximum is zero.
  • partial shading for example by reaching in with an arm or other objects, the same effect as described above will occur at one or more adjacent locations of the strip grid shown.
  • the triggering of the alarm can be recognized by integral electronics, depending on the size of the penetrating object and the duration of the penetration. Values can be specified here. In this way, false alarms are caused by flying around inside sect avoided.
  • the side areas of the windshield and rear window can additionally be provided with reflecting or reflection-enhancing foils or can be vapor-coated, coated, printed or otherwise provided in the factory with such suitable layers.
  • the possible intrusions to be protected Thieves are provided with a light curtain.
  • the light or radiation curtain is spatially structured either by switching on a grid or diagram in the beam path or by reflection on suitable materials that impart a spatial structuring to the reflected wave field. This makes arbitrary influence or outsmarting practically impossible.
  • Real, three-dimensional room surveillance that is, not just through curtains in front of windows or doors, can be set up using a hologram.
  • the hologram emitted into the room creates a stripe pattern similar to that on the rear parcel shelf of the vehicle when a line grid is imaged over the windshield and the rear window, for example on a ground glass.
  • the advantage of a hologram compared to a pure line raster is that a change in the difference between maxima and minima also occurs in the detector when the hologram is switched off not in the direct beam path between the radiation source and receiver, but on the side thereof. The reason for this is due to the fact that in the case of a hologram, the entire image information is present in every partial area of the hologram. Thus, each spatial area in which the radiation field generated by the hologram exists also contains all of the information stored in the hologram.
  • Shadowing any part of the radiation field therefore also causes a reduction in the intensity of the maximum and minimum of the focusing screen image.
  • This change can also be detected by suitable intelligent electronics.
  • it can be prevented by means of adjustable specifications that, for example, a field of the hologram flying around insect alarm is triggered.
  • A describes the idle state and B a fault, for example caused by the intrusion of a thief.
  • the intensity of the radiation incident on the receiver is shown on the ordinate.
  • the minimum is 1 and the maximum is 2.
  • the minimum is on the ordinate far below and the maximum is high.
  • wave trains are hidden.
  • the minimum rises and the maximum falls. This is shown at B.
  • the difference between maximum and minimum is different here than in A. This is recognized and an alarm is triggered.
  • FIG. 2 A again describes an idle state and B again describes a fault.
  • the problem is that extraneous light shines in with the intensity st.
  • FIG. 3 schematically shows a light source 12, a modulation grating or hologram 14, an optics 16, the windshield 18 of a motor vehicle, a reflective layer mounted thereon and a receiver 22.
  • the source with the modulation grating or hologram 14 and the optics 16 is for Example on the top of a dashboard or in the shelf.
  • the receiver 22 can be located in a side rail. It contains a diode arrangement as essential components. This contains a large number of light-sensitive diodes arranged at a short distance from one another.
  • a so-called intelligent electronic also belongs to the receiver. tronics. Components are switched and linked here in such a way that they independently select a maximum and minimum, form and save the difference and compare the subsequently incoming values with the stored reference value according to a specific program and, if necessary, trigger an alarm.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
EP86106425A 1985-12-21 1986-05-12 Procédé et disposition pour surveiller un espace Withdrawn EP0226694A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3545643 1985-12-21
DE3545643 1985-12-21
DE3612653 1986-04-15
DE19863612653 DE3612653A1 (de) 1985-12-21 1986-04-15 Verfahren und anordnung zum ueberwachen eines raumes

Publications (2)

Publication Number Publication Date
EP0226694A2 true EP0226694A2 (fr) 1987-07-01
EP0226694A3 EP0226694A3 (fr) 1988-08-31

Family

ID=25839237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106425A Withdrawn EP0226694A3 (fr) 1985-12-21 1986-05-12 Procédé et disposition pour surveiller un espace

Country Status (2)

Country Link
EP (1) EP0226694A3 (fr)
DE (1) DE3612653A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0647856A1 (fr) * 1993-10-07 1995-04-12 TEMIC TELEFUNKEN microelectronic GmbH Procédé de surveillance des ouvertures d'un espace fermé
EP1914129A3 (fr) * 2006-10-19 2008-09-24 Toyota Jidosha Kabushiki Kaisha Système de détection d'intrusions

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3734703A1 (de) * 1987-10-14 1989-04-27 Trans Signal Gilewsky Gmbh & C Verfahren zur ueberwachung von innenraeumen durch reflexionen lichtelektrischer strahlen
DE3916500A1 (de) * 1989-05-20 1990-11-22 Eberhard Zech Verfahren zur ermittlung des bewegungsablaufes eines gegenstandes, insbesondere eines gegenstandes in einem raum
DE3932659C1 (en) * 1989-09-29 1991-03-28 Richard Hirschmann Gmbh & Co, 7300 Esslingen, De Room e.g. vehicle interior and-or object monitoring method - examining changes in EM field beam from transmitter and activating alarm when amplitude of detected signals exceeds set level
DE19520891A1 (de) * 1995-06-08 1996-12-12 Abb Patent Gmbh Anordnung mit Emissionsgradstruktur im Infrarotbereich
DE29705580U1 (de) * 1997-03-27 1997-05-22 Bayerische Motoren Werke AG, 80809 München Vorrichtung zur Innenraumüberwachung eines Fahrzeugs
DE10012028A1 (de) * 2000-03-11 2001-09-27 Daimler Chrysler Ag Verfahren zum Überwachen eines Innenraums
DE10050083A1 (de) * 2000-10-10 2002-04-18 Sick Ag Vorrichtung und Verfahren zur Erfassung von Objekten

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1264809A (fr) * 1968-05-29 1972-02-23
DE2923433C2 (de) * 1979-06-09 1984-12-20 Günter Dipl.-Phys. Dr. 7000 Stuttgart Haag Einbruchsicherung für Flächen
AU6594080A (en) * 1980-01-19 1981-07-30 W. Vinten Ltd. Intruder alarm systems
DE3045217C2 (de) * 1980-12-01 1986-08-07 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren und Vorrichtung zur optischen Überwachung und Sicherung von Räumen gegen Eindringlinge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0647856A1 (fr) * 1993-10-07 1995-04-12 TEMIC TELEFUNKEN microelectronic GmbH Procédé de surveillance des ouvertures d'un espace fermé
US5506567A (en) * 1993-10-07 1996-04-09 Temic Telefunken Microelectronic Gmbh Process for monitoring the openings to an enclosed space
EP1914129A3 (fr) * 2006-10-19 2008-09-24 Toyota Jidosha Kabushiki Kaisha Système de détection d'intrusions

Also Published As

Publication number Publication date
DE3612653A1 (de) 1987-07-02
EP0226694A3 (fr) 1988-08-31
DE3612653C2 (fr) 1988-03-10

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Inventor name: KOLB, HANS, DR.