EP1087352A1 - Détecteur optique de fumée - Google Patents

Détecteur optique de fumée Download PDF

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Publication number
EP1087352A1
EP1087352A1 EP99118727A EP99118727A EP1087352A1 EP 1087352 A1 EP1087352 A1 EP 1087352A1 EP 99118727 A EP99118727 A EP 99118727A EP 99118727 A EP99118727 A EP 99118727A EP 1087352 A1 EP1087352 A1 EP 1087352A1
Authority
EP
European Patent Office
Prior art keywords
light
light source
smoke detector
receiver
measuring chamber
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Withdrawn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
EP99118727A
Other languages
German (de)
English (en)
Inventor
Peter Kunz
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 Building Technologies 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 EP99118727A priority Critical patent/EP1087352A1/fr
Publication of EP1087352A1 publication Critical patent/EP1087352A1/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Withdrawn legal-status Critical Current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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to 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 optical smoke detector with an optical module, which a light source, a measuring chamber, a light receiver and one connected to it Has evaluation circuit, the light receiver in the presence of smoke particles in forward and backward scattered light is applied to the measuring chamber.
  • EP-A-0 926 646 describes an optical smoke detector whose optical module has two Has light receivers, one with forward and the other with backward scattered light is acted upon. This arrangement has the advantage that the forward scattered light is applied to it Light receiver particularly well on smoldering fires and the one with backscattered light Light receiver responds particularly well to open fires, so that overall gives a good response to different types of fires.
  • This known smoke detector is now intended to compensate for aging and pollution and the temperature coefficient of the individual components as well as tolerances of the critical ones Components are improved. It should be a high-quality and universally applicable smoke detector be specified, which responds equally well to all types of fire and is nevertheless inexpensive can be manufactured.
  • This object is achieved according to the invention in that the direct light of the light source Reference receiver is arranged, through which a monitoring of the intensity of the Radiation emitted by the light source.
  • a third preferred embodiment of the smoke detector according to the invention is thereby characterized in that the evaluation circuit zero compensation of the received signal of the light receiver.
  • the zero compensation has the advantage that always the maximum Sensitivity is retained.
  • These means are preferably formed by a concave mirror, in the center of which is the reference receiver is arranged.
  • the optics module 1 essentially consists of a light source 2, a light receiver 3, and a light-tightly sealed by a side wall 4 and a cover (not shown) Measuring chamber 5 with a so-called labyrinth (not shown).
  • IRED infrared light emitting diode
  • LED visible light
  • the evaluation of forward and backward scattered light is essential for the smoke detector described and the reference receiver 7 for tracking the light source 2, but not the way in which the forward and backward scattered light is generated. So can on Mirror 8 dispenses and an arrangement with a light source and two light receivers or with two light sources and one light receiver (each in addition to the reference receiver 7) can be used (see EP-A-0 926 646).
  • Another important feature of the presented Smoke detector is the zero compensation, through which the receiver signal a compensation signal is superimposed, which is selected so that a regulation of the useful signal to zero. The zero compensation should now be based on that shown in FIG. 2 Evaluation circuit are explained.
  • the output signal designated by Im of the light receiver 3 becomes a current / voltage converter 16 supplied and converted by this into a voltage.
  • This tension is in a filter 17 freed of DC voltage components and unwanted frequencies. That largely interference-free output signal of the filter 17 is connected to the control line 12 Switch 18 alternately fed to one of two memories 19, 19 '. It is the switch 18 controlled by the control stage 11 so that the signal supplied by the filter 17 during the duration of the pulses of the radiation emitted by the light source 2 to one Memory, for example to the memory 19, and to the during the pulse pauses other memory, for example to the memory 19 '.
  • the output signal l r of the reference receiver 7 is processed via an analog chain of current / voltage converter 22, filter 23, switch or controlled switch 24, memories 25 and 25 'and subtraction stage 26.
  • the output signal of the subtracting stage 26 reaches the control stage 11 on the one hand and the modulator 13, on the other hand, which adjusts the light source 2 in such a way that the radiation emitted by it has a constant intensity.
  • the tracking voltage of the light source 2 is monitored in the control stage 11, so that continuously a diagnosis of the current detector status is available. Based on this diagnosis, the Control level 11 via an output SE to the operator notes on required maintenance work deliver.
  • the tracking voltage of the light source 2 increase sharply, which can be used for a measurement range extension.
  • Such The extension of the measuring range has the advantage that not only the usual and generally very small smoke concentrations that indicate the outbreak of a fire can be monitored, but also much larger, life-threatening Concentrations. With one for monitoring such life-threatening smoke concentrations suitable detectors can monitor the safety of escape routes and an escape route display system to be controlled. Such an escape route display system with the associated Escape route detectors are described in WO application PCT / CH 99/00413.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP99118727A 1999-09-22 1999-09-22 Détecteur optique de fumée Withdrawn EP1087352A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99118727A EP1087352A1 (fr) 1999-09-22 1999-09-22 Détecteur optique de fumée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99118727A EP1087352A1 (fr) 1999-09-22 1999-09-22 Détecteur optique de fumée

Publications (1)

Publication Number Publication Date
EP1087352A1 true EP1087352A1 (fr) 2001-03-28

Family

ID=8239040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118727A Withdrawn EP1087352A1 (fr) 1999-09-22 1999-09-22 Détecteur optique de fumée

Country Status (1)

Country Link
EP (1) EP1087352A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1732049A1 (fr) 2005-06-10 2006-12-13 Siemens S.A.S. Détecteur de feux ou de fumée à haute rejection de fausses alarmes
EP1881319A1 (fr) * 2006-07-20 2008-01-23 SICK Engineering GmbH Procédé et dispositif destinés à mesurer la diffusion de la lumière
US7365846B2 (en) 2002-06-20 2008-04-29 Siemens Aktiengesellschaft Scattered light smoke detector
DE102007013295A1 (de) 2007-03-16 2008-09-18 Aoa Apparatebau Gauting Gmbh Rauchmelder
US7463159B2 (en) 2002-06-20 2008-12-09 Siemens Building Technologies Ag Fire detector
DE102015004458A1 (de) 2014-06-26 2015-12-31 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren für einen klassifizierenden, rauchkammerlosen Luftzustandssensor
DE102014019172A1 (de) 2014-12-17 2016-06-23 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem
DE102014019773A1 (de) 2014-12-17 2016-06-23 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons
EP3457369A1 (fr) 2017-09-19 2019-03-20 ELMOS Semiconductor Aktiengesellschaft Circuit pour capteur de fumée
CN111006979A (zh) * 2019-11-05 2020-04-14 天津航空机电有限公司 一种用于烟雾探测器环境补偿的电路及补偿方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199150A1 (fr) * 1972-09-13 1974-04-05 Anglo Amer Corp South Africa
EP0122489A1 (fr) * 1983-04-08 1984-10-24 Nohmi Bosai Kogyo Co., Ltd. Dispositif pour tester le fonctionnement d'un détecteur de fumée photo-électrique
US4678921A (en) * 1984-02-13 1987-07-07 Nippondenso Co., Ltd. Photo-electric smoke detector with light shielding electrode
EP0530723A1 (fr) * 1991-09-06 1993-03-10 Cerberus Ag Détecteur optique de fumée avec surveillance active
EP0567791A1 (fr) * 1992-04-27 1993-11-03 Whirlpool Europe B.V. Détecteur de la fumée et de la vapeur pour le four à micro-ondes
EP0926646A1 (fr) * 1997-12-24 1999-06-30 Siemens Building Technologies AG Détecteur de fumée optique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199150A1 (fr) * 1972-09-13 1974-04-05 Anglo Amer Corp South Africa
EP0122489A1 (fr) * 1983-04-08 1984-10-24 Nohmi Bosai Kogyo Co., Ltd. Dispositif pour tester le fonctionnement d'un détecteur de fumée photo-électrique
US4678921A (en) * 1984-02-13 1987-07-07 Nippondenso Co., Ltd. Photo-electric smoke detector with light shielding electrode
EP0530723A1 (fr) * 1991-09-06 1993-03-10 Cerberus Ag Détecteur optique de fumée avec surveillance active
EP0567791A1 (fr) * 1992-04-27 1993-11-03 Whirlpool Europe B.V. Détecteur de la fumée et de la vapeur pour le four à micro-ondes
EP0926646A1 (fr) * 1997-12-24 1999-06-30 Siemens Building Technologies AG Détecteur de fumée optique

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7365846B2 (en) 2002-06-20 2008-04-29 Siemens Aktiengesellschaft Scattered light smoke detector
US7463159B2 (en) 2002-06-20 2008-12-09 Siemens Building Technologies Ag Fire detector
EP1732049A1 (fr) 2005-06-10 2006-12-13 Siemens S.A.S. Détecteur de feux ou de fumée à haute rejection de fausses alarmes
US7760102B2 (en) 2005-06-10 2010-07-20 Siemens Ag Fire or smoke detector with high false alarm rejection performance
EP1881319A1 (fr) * 2006-07-20 2008-01-23 SICK Engineering GmbH Procédé et dispositif destinés à mesurer la diffusion de la lumière
DE102007013295A1 (de) 2007-03-16 2008-09-18 Aoa Apparatebau Gauting Gmbh Rauchmelder
DE102015004458A1 (de) 2014-06-26 2015-12-31 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren für einen klassifizierenden, rauchkammerlosen Luftzustandssensor
DE102014019172A1 (de) 2014-12-17 2016-06-23 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem
DE102014019773A1 (de) 2014-12-17 2016-06-23 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons
EP3457369A1 (fr) 2017-09-19 2019-03-20 ELMOS Semiconductor Aktiengesellschaft Circuit pour capteur de fumée
CN111006979A (zh) * 2019-11-05 2020-04-14 天津航空机电有限公司 一种用于烟雾探测器环境补偿的电路及补偿方法
CN111006979B (zh) * 2019-11-05 2023-06-23 天津航空机电有限公司 一种用于烟雾探测器环境补偿的电路及补偿方法

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