EP1381005A1 - Détecteur d'événement avec une caméra - Google Patents

Détecteur d'événement avec une caméra Download PDF

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Publication number
EP1381005A1
EP1381005A1 EP02015173A EP02015173A EP1381005A1 EP 1381005 A1 EP1381005 A1 EP 1381005A1 EP 02015173 A EP02015173 A EP 02015173A EP 02015173 A EP02015173 A EP 02015173A EP 1381005 A1 EP1381005 A1 EP 1381005A1
Authority
EP
European Patent Office
Prior art keywords
camera
event detector
detector according
housing
room
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Withdrawn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
EP02015173A
Other languages
German (de)
English (en)
Inventor
Kurt Dr. Müller
Thomas Dr. Brupbacher
Markus Dr. Loepfe
Walter Vollenweider
Dieter Wieser
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 Building Technologies 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 Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to EP02015173A priority Critical patent/EP1381005A1/fr
Publication of EP1381005A1 publication Critical patent/EP1381005A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical 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
    • G08B13/194—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 image scanning and comparing systems
    • G08B13/196—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 image scanning and comparing systems using television cameras
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
    • G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Definitions

  • the present invention relates to an event detector for ceiling mounting, with a camera for the observation of a surveillance room and with an evaluation level in which the Images taken by the camera for the occurrence of events to be monitored characteristic parameters are examined.
  • Event alarms of this type exist from a video or infrared camera, the evaluation level and a communication level for communication with a head office.
  • the arrangement of the elements mentioned is like this chosen that either the camera or the evaluation and communication level in are arranged in a housing (whereby it remains open whether it is a common housing acts), or the camera is used separately from the evaluation and communication level becomes.
  • the camera type is not described in detail, but it can be assumed be that it is a common camera that is clearly recognizable as such in a room frequented by people where the use of surveillance cameras is not common as would be perceived as disturbing. That is to say that it is people doesn't bother in a bank branch or museum from a surveillance camera being observed, but doing such surveillance in an office or in a Rather refuse restaurant.
  • the event detector described in the document mentioned is primarily a fire detector, which can however be used as an intruder detector. For this use it is only stated that people through object analysis and image sequence analysis using spatial frequencies can be easily recognized.
  • the extraction of fire and intrusion information from the monitor images one and the same camera is known from US-A-5 289 275.
  • EP-A-1 124 210 there is a known type of fire detector described, in which an activity sensor for detecting movement activities is integrated. This activity sensor is used for adaptive adaptation of the fire detector (e.g. adjustment from its detection thresholds) to the movement activities in the concerned Room and / or for the central display of the locations of a building with movement activities.
  • This first class is designed for use in a "private" environment rather unsuitable for the reasons given and therefore mainly for use in Banks, museums and the like are provided.
  • a conventional one Fire and a conventional motion sensor e.g. a scattered light sensor for smoke and a passive infrared sensor for movement
  • the latter means two sensors, two evaluation levels and possibly even separate wiring for each of the two sensors.
  • An event detector of the type mentioned at the outset is now to be specified by the invention, which is characterized by the smallest possible dimensions and therefore also in one private interior is not perceived as disturbing. In particular, people who are are in the room in question, do not have the impression of being constantly from a video camera to be monitored.
  • this object is achieved in that the camera is provided by a CMOS camera is formed.
  • a second preferred embodiment is characterized in that the camera in a housing intended for surface or flush mounting is arranged.
  • This embodiment has the advantage that the camera is extremely discreet can be assembled and is usually not perceived as such.
  • the lens of the camera can be vertical or slanted downwards from the housing and the camera rigidly mounted in the housing respectively rotatable about a vertical axis and / or in different rotational angle positions be fixable.
  • Means are provided for illuminating the monitoring room. These means are preferred for the continuous or intermittent emission of visible light or infrared Radiation trained.
  • Another preferred embodiment is characterized in that a measurement of the Luminous intensity in the monitoring room and when the luminous intensity falls below a threshold an increase in sensitivity to the different fire parameters, in particular Smoke, clouds of smoke and heat streaks occur.
  • This preferred embodiment of the event detector used as a fire detector serves
  • the detector is less sensitive when people are present in the monitoring room and more sensitive in an empty surveillance room. This is because in People present in a room can do something that can trigger a false alarm can and on the other hand detect the smallest smoldering fire much earlier (smell) as the best smoke detector. Since it can be assumed that in the presence of a person in a room there is a certain minimal lighting measurement of the light intensity is a good criterion whether there are people in the surveillance room stop or not. And this measurement is much cheaper than that Use of a special presence detector. In the dark in the surveillance room, if For example, people sleeping in this, the sensitivity is increased.
  • a further preferred embodiment of the event detector according to the invention is thereby characterized in that the detector for the detection of movements of an object in the Monitoring room is formed, which can be recognized by changes in the image sequences are.
  • Another preferred embodiment is characterized in that the detector as People counter is trained.
  • Another preferred embodiment is characterized in that the processing the image signals of the camera decentrally in the detectors and their evaluation in a control center is carried out, with the detectors only transmitting brightness information to the control center become.
  • the 1 and 2 each show an event detector mounted on the ceiling of a monitoring room M, which essentially consists of a housing 1, a camera 2 mounted therein and a processing level 3.
  • the camera 2 is the CMOS micro-camera module for Use intended in mobile phones, with optics and a single chip, which performs the functions of image sensor and processor.
  • the dimensions of the complete Camera modules are below 10 by 10 by 5 mm; the image sensor is a pixel by pixel addressable sensor, which is characterized by a very low power consumption and accessibility on individual pixels.
  • the output signal from camera 2 is a pixel image of the monitoring room, which in processing stage 3 for brightness information the rows and rows of pixels are processed.
  • Processing level 3 also serves Control and is according to FIG. 3 with a communication level 4 for communication with a control center (not shown) connected.
  • the signal from camera 2 is therefore processed in detector M, but is not evaluated.
  • the detector Does not transmit images to the head office, but data that is evaluated centrally.
  • the Evaluation of this data consists, for example, of the data supplied by the camera 2 Brightness information corresponding to images with reference images or with each other compare and thereby recognize changes in image sequences and the occurrence of Derive hazard parameters.
  • the transfer of data to the head office has the advantage that the requirements for the capacity of the transmission to the headquarters are significantly reduced and practically no restrictions on wired or wireless communication consist. In addition, no complex data compressions are required.
  • the camera 2 makes at intervals of A picture of the surveillance room in a fraction of a second. This is through the intermediate stage the acquisition of the brightness information in the control center compared with reference images, which are characteristic of the occurrence of certain hazard parameters.
  • reference pictures can, for example, pictures of flames, objects, states or movements his.
  • the image is compared with one or more subsequent images to form one To be able to recognize changes in the image sequence.
  • Such a change can, for example is that the structure of the surveillance room becomes blurred, which is an indication of the Smoke would occur.
  • a determination of the Brightness of the individual pixels or groups of pixels of the images of the camera 2 is made.
  • the brightness of the pixels is determined by a process in which one for the Brightness representative value is obtained, the temporal course of which is based on the occurrence characteristic change is examined by Rauch.
  • the determination is made the brightness of the pixels through an edge extraction process in which each pixel an edge value is assigned and compared with an average value.
  • the edge extraction process is not explained in more detail here; in this context it will refer to the international Application No. PCT / CH 01/00731, in which a method of this type is described in detail is.
  • Another possibility of smoke detection is that the camera 2 does this through the Scattered light caused by smoke.
  • This procedure corresponds to that of the Scattered light smoke detectors widely used today, only that the Measuring room in which the scattered light is measured, not one provided inside the detector Measuring chamber but the monitoring room itself.
  • To increase the scattered light can on or on the detector M or next to this light sources 5, for example LEDs or IREDs can be provided which intermittently or continuously illuminate the monitoring room.
  • the detector M can also be operated in such a way that there is sufficient lighting monitors the structure of the surveillance room according to the procedure just described and the scattered light is measured in the dark.
  • the brightness in the monitoring room is determined from the image of the camera 2 and the detector M is switched to the corresponding mode based on the brightness.
  • the brightness determination can also be used as a criterion for the presence or absence of people in the surveillance room and make the detector M more sensitive or set less sensitive. This is based on the following consideration: if staying in a room and being active, i.e. not sleeping, then in the room certain light conditions prevail, so that a light intensity above a certain threshold on the presence and below this threshold on the Indicates the absence of active persons in the room in question.
  • a sensitivity switchover is not only the case with a camera 2 equipped smoke detectors advantageous, but also with other smoke detectors, such as for example, scattered-light smoke detectors or thermal detectors. These detectors would then have to be equipped with an appropriate measuring device for the ambient light, for example with a photo transistor or a photosensitive resistor that detects the ambient light receives somewhat unhindered.
  • Another important hazard parameter that can be monitored with detector M is the movement of people in the surveillance room.
  • By comparing the images from the camera 2 with a reference image representing the monitoring room without foreign objects can locate foreign objects and their movement can be compared based on one another following pictures are tracked.
  • a closer examination of the image area with the foreign object enables a classification of the object and in particular the differentiation between humans and animals.
  • the camera 2 is permanently installed in the housing 1 and their lens is directed vertically downwards.
  • the housing 1 has in the area of its top a transparent window 6 through which the camera 2 "sees". From a given Opening angle ⁇ of the lens results in a defined conical monitoring space with a certain volume, which at a certain installation height of the detector M is proportional to the square of the radius of the cone. 2 can be an essential Achieve an increase in the volume of the surveillance room if you have the camera 2 not fixed in the housing 1 but rotatable about a vertical axis, the optical The axis of the lens is not vertical but sloping downwards.
  • the interstitial space also has the shape of a cone but with a multiple volume 1.
  • the transparent window 6 is correspondingly larger chosen as in the embodiment of FIG. 1.
  • the mounting type of the detector M shown in FIGS. 1 and 2 is referred to as surface mounting.
  • Another possibility is the so-called flush mounting, in which the housing 1 is sunk into the ceiling.
  • the housing 1 has the shape of a flat box, whose cover directed towards the surveillance room practically closes with the ceiling.
  • the M detector is extremely discreet and hardly used as a detector detect. detect.
  • the light sources 5 could also be flush-mounted when the detector M is flush-mounted mounted and sunk into the ceiling.
  • detector M In addition to the applications mentioned as fire and / or motion detectors, detector M also used to also be used as a people counter and the number of count people passing through the surveillance room. This function is important for Detection of congestion in escape routes and / or for constant monitoring of the number of people in a room or building as information for possible evacuations.
  • the Detector M can also take over the function of a presence detector and to control the Air conditioning / ventilation / heating and or the lighting of a room can be used.
  • the detector M can also be used to detect abnormal movements detect and from this in a learning process based on these movements behavior patterns to close and, for example, countermeasures against possible crimes or to initiate accidents.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
EP02015173A 2002-07-08 2002-07-08 Détecteur d'événement avec une caméra Withdrawn EP1381005A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02015173A EP1381005A1 (fr) 2002-07-08 2002-07-08 Détecteur d'événement avec une caméra

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02015173A EP1381005A1 (fr) 2002-07-08 2002-07-08 Détecteur d'événement avec une caméra

Publications (1)

Publication Number Publication Date
EP1381005A1 true EP1381005A1 (fr) 2004-01-14

Family

ID=29724406

Family Applications (1)

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EP02015173A Withdrawn EP1381005A1 (fr) 2002-07-08 2002-07-08 Détecteur d'événement avec une caméra

Country Status (1)

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EP (1) EP1381005A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034908A1 (de) * 2004-07-19 2006-03-16 Airbus Deutschland Gmbh Rauchmeldesystem
EP1818884A1 (fr) * 2006-02-13 2007-08-15 Gerhard Dzubiel Dispositif de détection de fumée
EP2077538A1 (fr) * 2008-01-07 2009-07-08 Pal Tate Industrial Co., Ltd. Caméra de surveillance
WO2009129870A1 (fr) * 2008-04-25 2009-10-29 Robert Bosch Gmbh Dispositif et procédé de détection d'incendie et/ou de signes caractéristiques d'incendie
US7651281B2 (en) 2008-01-07 2010-01-26 Pal Tate Industrial Co., Ltd. Surveillance camera
WO2013041483A3 (fr) * 2011-09-21 2013-05-23 Robert Bosch Gmbh Détecteur d'incendie avec ensemble de capteurs
DE102014224557A1 (de) * 2014-12-01 2016-06-02 Osram Gmbh Bildverarbeitung mittels Kreuzkorrelation

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435007A2 (fr) * 1989-12-28 1991-07-03 Emo-Elektronik Gmbh Dispositif de surveillance avec un écran de matériau synthétique, en particulier noir non transparent à la lumière visible
EP0591585A1 (fr) * 1991-07-31 1994-04-13 Mutuo Tanaka Unité de surveillance à distance
WO1995034988A2 (fr) 1994-06-14 1995-12-21 Telepresence Systems Limited Cameras miniatures
FR2740245A1 (fr) * 1995-10-24 1997-04-25 Saubade Jacques Dispositif pour capter et transmettre des images, et installation de telesurveillance comportant un tel dispositif
WO1998030989A1 (fr) * 1997-01-08 1998-07-16 Texecom Limited Dispositif de surveillance
WO2000022588A1 (fr) * 1998-10-15 2000-04-20 Acbond Limited Perfectionnements relatifs a des accessoires electriques
US6064430A (en) * 1995-12-11 2000-05-16 Slc Technologies Inc. Discrete surveillance camera devices
EP1059621A1 (fr) * 1999-06-09 2000-12-13 Colebrand Limited Transmetteur de lumière
EP1109141A1 (fr) * 1999-12-17 2001-06-20 Siemens Building Technologies AG Détecteur de présence et son utilisation
WO2001067415A1 (fr) 2000-03-09 2001-09-13 Robert Bosch Gmbh Detecteur d'incendie imageur

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435007A2 (fr) * 1989-12-28 1991-07-03 Emo-Elektronik Gmbh Dispositif de surveillance avec un écran de matériau synthétique, en particulier noir non transparent à la lumière visible
EP0591585A1 (fr) * 1991-07-31 1994-04-13 Mutuo Tanaka Unité de surveillance à distance
WO1995034988A2 (fr) 1994-06-14 1995-12-21 Telepresence Systems Limited Cameras miniatures
FR2740245A1 (fr) * 1995-10-24 1997-04-25 Saubade Jacques Dispositif pour capter et transmettre des images, et installation de telesurveillance comportant un tel dispositif
US6064430A (en) * 1995-12-11 2000-05-16 Slc Technologies Inc. Discrete surveillance camera devices
WO1998030989A1 (fr) * 1997-01-08 1998-07-16 Texecom Limited Dispositif de surveillance
WO2000022588A1 (fr) * 1998-10-15 2000-04-20 Acbond Limited Perfectionnements relatifs a des accessoires electriques
EP1059621A1 (fr) * 1999-06-09 2000-12-13 Colebrand Limited Transmetteur de lumière
EP1109141A1 (fr) * 1999-12-17 2001-06-20 Siemens Building Technologies AG Détecteur de présence et son utilisation
WO2001067415A1 (fr) 2000-03-09 2001-09-13 Robert Bosch Gmbh Detecteur d'incendie imageur

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034908A1 (de) * 2004-07-19 2006-03-16 Airbus Deutschland Gmbh Rauchmeldesystem
US7724151B2 (en) 2004-07-19 2010-05-25 Airbus Deutschland Gmbh Smoke alarm system
EP1818884A1 (fr) * 2006-02-13 2007-08-15 Gerhard Dzubiel Dispositif de détection de fumée
EP2077538A1 (fr) * 2008-01-07 2009-07-08 Pal Tate Industrial Co., Ltd. Caméra de surveillance
US7651281B2 (en) 2008-01-07 2010-01-26 Pal Tate Industrial Co., Ltd. Surveillance camera
WO2009129870A1 (fr) * 2008-04-25 2009-10-29 Robert Bosch Gmbh Dispositif et procédé de détection d'incendie et/ou de signes caractéristiques d'incendie
US8754942B2 (en) 2008-04-25 2014-06-17 Robert Bosch Gmbh Detection device and method for detecting fires and/or signs of fire
CN102016944B (zh) * 2008-04-25 2014-12-03 罗伯特·博世有限公司 用于探测火灾和/或火灾特征的探测装置以及方法
WO2013041483A3 (fr) * 2011-09-21 2013-05-23 Robert Bosch Gmbh Détecteur d'incendie avec ensemble de capteurs
DE102014224557A1 (de) * 2014-12-01 2016-06-02 Osram Gmbh Bildverarbeitung mittels Kreuzkorrelation
US10268922B2 (en) 2014-12-01 2019-04-23 Osram Gmbh Image processing by means of cross-correlation

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