EP0402829A2 - Procédé et dispositif de détection d'intrus utilisant un détecteur de mouvement passif à infrarouge - Google Patents

Procédé et dispositif de détection d'intrus utilisant un détecteur de mouvement passif à infrarouge Download PDF

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Publication number
EP0402829A2
EP0402829A2 EP90111007A EP90111007A EP0402829A2 EP 0402829 A2 EP0402829 A2 EP 0402829A2 EP 90111007 A EP90111007 A EP 90111007A EP 90111007 A EP90111007 A EP 90111007A EP 0402829 A2 EP0402829 A2 EP 0402829A2
Authority
EP
European Patent Office
Prior art keywords
heat source
sensor
signals
intruder
sensor elements
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Withdrawn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
EP90111007A
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German (de)
English (en)
Other versions
EP0402829A3 (fr
Inventor
Bernhard Dr. Hering
Konrad Kraus
Harald Dipl.-Ing. Schermann
Karlheinz Dipl.-Ing. Schreyer (Fh)
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
Publication of EP0402829A2 publication Critical patent/EP0402829A2/fr
Publication of EP0402829A3 publication Critical patent/EP0402829A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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

Definitions

  • the invention relates to a method for detecting an intruder, which is a moving heat source, by means of a passive infrared motion detector with a sensor head which has a plurality of sensor elements, each of which detects a lobe-shaped area and emits a signal when the heat source enters, and an apparatus for performing this method.
  • Passive infrared motion detectors or sensors are known per se; they generally have facet mirrors or facet lenses so that they can be used as motion detectors.
  • the facet optic creates several narrow zones in the field of view of the sensor and maps them to a differential element that is sensitive to infrared radiation. If a heat source crosses one of the zones, a typical signal pattern results, with positive and negative signal pulses which are used for evaluation.
  • these known infrared sensors which have a very different design, have certain disadvantages.
  • the evaluation strategies for avoiding false alarms are usually based on the selection of certain signal patterns for triggering the alarm.
  • EP-A-0 107 042 In order to reduce false alarms, it has already been proposed in EP-A-0 107 042 to provide two sensor elements.
  • the current signal obtained from a first sensor element is continuously compared in a correlator with reference signals which are stored in a read-only memory and with the current signals obtained from a second sensor element monitoring the close range.
  • the correlator emits an output signal which corresponds to the correlation of the two signals compared with one another.
  • An alarm signal is triggered when the correlation exceeds a predetermined value and the amplitude reaches the threshold.
  • the second sensor is here used for reference only. Spatial imaging is not possible with the known infrared detector. It is also not possible to determine the typical course of a measured value curve caused by an intruder.
  • the object of the invention is to avoid the disadvantages mentioned above and to provide a method and a device which ensures precise spatial monitoring of the area to be protected and permits reliable alarming, false alarms and tampering being largely excluded.
  • the area to be protected is monitored by two angle-selective passive infrared sensor heads with different locations.
  • two pyrodectors can be used as angle-sensitive sensor heads, as are known from EP-A-0 245 842.
  • a PVDF film with a row of sensor elements is attached in the focal plane of a spherical or spherical-parabolic mirror. This mirror optic assigns a corresponding lobe in the detection range to each individual sensor element, so that angle-selective detection of an infrared radiation source is possible.
  • Such a heat source is aimed from two different directions and its location can be continuously determined by triangulation.
  • the movement path of the heat source and thus the track of the intruder can be recorded in the common detection area of both sensor heads and a reliable alarm criterion for a movement detector can be derived from this movement path or track.
  • false alarms such as can be caused, for example, by radiators switching on, air movement or solar radiation, are virtually excluded. Due to the spatial resolution is advantageously clearly recognized whether the intruder has actually traveled a certain distance in the surveillance area.
  • a radial movement ie a movement directly towards one of the sensor heads, is also clearly identified, such as a small animal which cannot be detected and which is in the immediate vicinity of a sensor, is recognized as a non-intruder and does not give rise to an alarm.
  • signals of different heights are generated in the individual sensor elements, which are separately amplified and digitized for each sensor element.
  • the signals obtained in this way are expediently processed further in a microprocessor, a direction vector to the heat source being calculated for each sensor head by geometrically correct weighting of the individual digitized signals. From the intersection of two corresponding direction vectors, the current position of the heat source is continuously determined and from this the track that the intruder travels is formed. In this case, an alarm criterion is advantageously derived from the shape and length of the track and an alarm signal is emitted.
  • the direction of movement or position of the intruder can also be displayed as additional information.
  • a conventional facet detector is shown as a drawing in plan view.
  • Such a detector is e.g. known from DE-OS 2 103 909.
  • a new type of infrared sensor is shown schematically, which is designed as an angle-selective passive sensor head SK, an optical arrangement being used in which an array of electrically and thermally separated sensor elements SE lies in the focal plane of a spherical mirror KS, as it is is known from the above-mentioned European patent application 0 245 842.
  • Each sensor element SE is assigned a club-shaped detection area KB by the mirror optics (KS).
  • the geometry of the individual beam lobes KB is determined by the focal length of the spherical mirror KS and the number, shape and size of the selective zones.
  • a sensor head SK1 has at least four sensor elements (SE) which form four lobe-shaped monitoring areas KB.
  • a heat source in the present case an intruder EN
  • enters the detection area EB of the sensor heads SK1 and SK2 signals of different heights occur in the individual sensor elements SE depending on the position and extent of the heat source.
  • a direction vector RV1, RV2 to the heat source EN is calculated with a computer by geometrically correct weighting of the individual signals for each sensor head SK1, SK2.
  • the current position of the heat source EN results from the intersection of the two direction detectors RV1, RV2. By continuously calculating this position, the trace of the object is traced in the computer and the alarm trigger is derived from it. In addition, the.
  • the display device Trajectory or the position of the intruder can be graphed or otherwise displayed.
  • Each sensor head SK1 and SK2 here has, for example, four sensor elements SE, the signals of which are each fed to an analog-digital converter AD via an amplifier VER.
  • the digitized signals of both sensor heads SK1, SK2 and all sensor elements SE are fed to a microcomputer ⁇ R, which carries out the corresponding processing of these signals.
  • the microcomputer ⁇ R has a control panel BF and a display device ANZ, via which an alarm signal is displayed, which can be output optically or acoustically as alarm AL.
  • the movement path or position of the intruder can also be displayed on a colored screen BS connected to the display device ANZ.
  • the invention not only has the advantage that fixed temperature changes do not lead to a false alarm, it also has the advantage that false alarms are reduced by better delimitation of the monitoring area. Small animals in the close range of the sensor cannot trigger false alarms either, because the distance information enables a better estimate of the intensity of the heat source and can thus be recognized whether it is an actual intruder or a fly.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
EP19900111007 1989-06-14 1990-06-11 Procédé et dispositif de détection d'intrus utilisant un détecteur de mouvement passif à infrarouge Withdrawn EP0402829A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919488 1989-06-14
DE3919488 1989-06-14

Publications (2)

Publication Number Publication Date
EP0402829A2 true EP0402829A2 (fr) 1990-12-19
EP0402829A3 EP0402829A3 (fr) 1991-06-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900111007 Withdrawn EP0402829A3 (fr) 1989-06-14 1990-06-11 Procédé et dispositif de détection d'intrus utilisant un détecteur de mouvement passif à infrarouge

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EP (1) EP0402829A3 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693011A1 (fr) * 1992-06-29 1993-12-31 Matra Sep Imagerie Inf Procédé et dispositif de surveillance d'une scène tridimensionnelle, mettant en Óoeuvre des capteurs d'imagerie.
GB2286074A (en) * 1994-01-31 1995-08-02 C & K Systems Inc Location independent intrusion detection system
NL9400670A (nl) * 1994-04-26 1995-12-01 Marinus Bernardus De Goeij Alarmstelsel en een hiervoor geschikte bewegingsdetector.
WO1995034056A1 (fr) * 1994-06-09 1995-12-14 Edouard Menoud Dispositif de surveillance et d'alerte de la presomption de corps en danger dans une piscine
EP0747868A1 (fr) * 1995-06-08 1996-12-11 ABBPATENT GmbH Arrangement avec structure graduée d'émission dans l'infrarouge
EP0747865A2 (fr) * 1995-06-08 1996-12-11 ABBPATENT GmbH Dispositif de détermination du sens de déplacement d'une personne
DE19548578C2 (de) * 1995-12-27 2001-02-08 Elbau Elektronik Bauelemente G Positionsselektiver passiver Infrarot-Intrusion-Sensor
GB2375251A (en) * 2001-04-30 2002-11-06 Infrared Integrated Syst Ltd Monitoring a region using PIR detectors
EP1361553A1 (fr) * 2002-05-08 2003-11-12 Infrared Integrated Systems Ltd. Système de surveillance pour la localisation d'évenements dans un espace à trois dimensions
WO2016016900A1 (fr) * 2014-07-30 2016-02-04 Tyco Fire & Security Gmbh Procédé et système pour le suivi passif d'objets mobiles

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2402204A1 (de) * 1974-01-17 1975-07-24 Ficht Reinhold Verfahren zur bestimmung der lage eines punktes innerhalb eines virtuellen messraumes und einrichtung zur durchfuehrung des verfahrens
DE3023290A1 (de) * 1980-06-21 1982-03-04 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Einrichtung zur zielerfassung von bewegten und stationaeren bodenzielen von tieffliegenden flugzeugen aus
DE3404402C1 (de) * 1984-02-08 1985-04-25 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Einrichtung zur optischen winkelmäßigen Erkennung eines beweglichen Zieles
DE3642196A1 (de) * 1986-12-10 1988-06-23 Mel Mikro Elektronik Gmbh Optoelektronische kollisionsschutzvorrichtung fuer fahrzeuge
WO1989006806A1 (fr) * 1988-01-19 1989-07-27 Peter Frederick Bradbeer Appareil de detection d'energie sensible a la direction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2402204A1 (de) * 1974-01-17 1975-07-24 Ficht Reinhold Verfahren zur bestimmung der lage eines punktes innerhalb eines virtuellen messraumes und einrichtung zur durchfuehrung des verfahrens
DE3023290A1 (de) * 1980-06-21 1982-03-04 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Einrichtung zur zielerfassung von bewegten und stationaeren bodenzielen von tieffliegenden flugzeugen aus
DE3404402C1 (de) * 1984-02-08 1985-04-25 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Einrichtung zur optischen winkelmäßigen Erkennung eines beweglichen Zieles
DE3642196A1 (de) * 1986-12-10 1988-06-23 Mel Mikro Elektronik Gmbh Optoelektronische kollisionsschutzvorrichtung fuer fahrzeuge
WO1989006806A1 (fr) * 1988-01-19 1989-07-27 Peter Frederick Bradbeer Appareil de detection d'energie sensible a la direction

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693011A1 (fr) * 1992-06-29 1993-12-31 Matra Sep Imagerie Inf Procédé et dispositif de surveillance d'une scène tridimensionnelle, mettant en Óoeuvre des capteurs d'imagerie.
EP0577491A1 (fr) * 1992-06-29 1994-01-05 Matra Cap Systemes Procédé et dispositif de surveillance d'une scène tridimensionnelle, mettant en oeuvre des capteurs d'imagerie
GB2286074A (en) * 1994-01-31 1995-08-02 C & K Systems Inc Location independent intrusion detection system
NL9400670A (nl) * 1994-04-26 1995-12-01 Marinus Bernardus De Goeij Alarmstelsel en een hiervoor geschikte bewegingsdetector.
US5886630A (en) * 1994-06-09 1999-03-23 Menoud; Edouard Alarm and monitoring device for the presumption of bodies in danger in a swimming pool
WO1995034056A1 (fr) * 1994-06-09 1995-12-14 Edouard Menoud Dispositif de surveillance et d'alerte de la presomption de corps en danger dans une piscine
CH691151A5 (fr) * 1994-06-09 2001-04-30 Edouard Menoud Dispositif de surveillance et d'alerte de la présence de corps en danger dans une piscine.
EP0747868A1 (fr) * 1995-06-08 1996-12-11 ABBPATENT GmbH Arrangement avec structure graduée d'émission dans l'infrarouge
EP0747865A2 (fr) * 1995-06-08 1996-12-11 ABBPATENT GmbH Dispositif de détermination du sens de déplacement d'une personne
EP0747865A3 (fr) * 1995-06-08 1998-09-30 ABBPATENT GmbH Dispositif de détermination du sens de déplacement d'une personne
DE19548578C2 (de) * 1995-12-27 2001-02-08 Elbau Elektronik Bauelemente G Positionsselektiver passiver Infrarot-Intrusion-Sensor
GB2375251A (en) * 2001-04-30 2002-11-06 Infrared Integrated Syst Ltd Monitoring a region using PIR detectors
GB2375251B (en) * 2001-04-30 2003-03-05 Infrared Integrated Syst Ltd The location of events in a three dimensional space under surveillance
US7355626B2 (en) 2001-04-30 2008-04-08 Infrared Integrated Systems Limited Location of events in a three dimensional space under surveillance
EP1361553A1 (fr) * 2002-05-08 2003-11-12 Infrared Integrated Systems Ltd. Système de surveillance pour la localisation d'évenements dans un espace à trois dimensions
WO2016016900A1 (fr) * 2014-07-30 2016-02-04 Tyco Fire & Security Gmbh Procédé et système pour le suivi passif d'objets mobiles
GB2542087A (en) * 2014-07-30 2017-03-08 Tyco Fire & Security Gmbh Method and system for passive tracking of moving objects
US9726544B2 (en) 2014-07-30 2017-08-08 Tyco Fire & Security Gmbh Method and system for passive tracking of moving objects
GB2542087B (en) * 2014-07-30 2019-03-27 Tyco Fire & Security Gmbh Method and system for passive tracking of moving objects

Also Published As

Publication number Publication date
EP0402829A3 (fr) 1991-06-12

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