EP1887536A1 - Détecteur de fumée à lumière diffusée - Google Patents

Détecteur de fumée à lumière diffusée Download PDF

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Publication number
EP1887536A1
EP1887536A1 EP06118673A EP06118673A EP1887536A1 EP 1887536 A1 EP1887536 A1 EP 1887536A1 EP 06118673 A EP06118673 A EP 06118673A EP 06118673 A EP06118673 A EP 06118673A EP 1887536 A1 EP1887536 A1 EP 1887536A1
Authority
EP
European Patent Office
Prior art keywords
light
scattered light
smoke detector
detector according
filter
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Withdrawn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
EP06118673A
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German (de)
English (en)
Inventor
Martin Forster
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 Schweiz AG
Original Assignee
Siemens Schweiz 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 Schweiz AG filed Critical Siemens Schweiz AG
Priority to EP06118673A priority Critical patent/EP1887536A1/fr
Priority to PCT/EP2007/058255 priority patent/WO2008017698A1/fr
Publication of EP1887536A1 publication Critical patent/EP1887536A1/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a scattered light smoke detector with a transmitting device for the emission of light of two different wavelengths in a scattering volume and with a receiving device for the selective reception of scattered light of the two wavelengths mentioned.
  • Scattered light smoke detector with light sources which emit different colored light in the scattering volume, are known and, for example in the EP-A-0 926 646 and 1 408 469 described.
  • EP-A 0 926 646 It can be seen that scattered light smoke detectors with a red transmitter diode have a much better and those with a blue transmitter diode a significantly better response to open fires. The response of such detectors is improved to such an extent that the detection properties for open fires come close to ionization detectors or so-called backward scatterers.
  • Backward scatterers are known to be scattered light smoke detectors with a spread angle of over 90 °, the open fires recognize better than forward scatterers, but where the receiver signal is only a fraction of the receiver signal of forward scatterers. The reason for this improved detection of open fires is probably that at shorter wavelengths, smaller aerosols, such as those that occur in open fires, can be detected much better.
  • Both known stray-light smoke detectors are relatively sensitive to ambient light, resulting in a high fundamental pulse, which in turn causes small differences in stray light to be unambiguously measured in forward and backward scattering, and thus, for example, smoke from fire and water mist or smoke from fire and welding can not be differentiated with certainty.
  • the receiving device is formed by at least one photocell with a wavelength-selective filter having at least two passbands for the wavelengths mentioned.
  • the wavelength-selective filter according to the invention makes it possible to apply light of more than one wavelength to the scattering volume and nevertheless to completely eliminate the ambient light.
  • a first preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that the one transmission range in the infrared range is 850 nm to 1050 nm and is preferably 880 nm and the other transmission range in the blue range is 330 nm to 430 nm and preferably 430 nm is.
  • a second preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that the transmitting device is formed by two light emitting diodes of different wavelengths, which light under two send different angles in the scattering volume, and that the receiving means is formed by a photocell with a dual-band optical filter which receives the scattered light from the scattering volume at a forward and a backward scattering angle.
  • a third preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that the transmitting device is formed by a diode emitting light of different wavelengths and the receiving device is formed by a photocell with an optical dual-passband filter.
  • a fourth preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that the transmitting device is formed by two light emitting diodes of different wavelengths and the receiving device by a photocell with an optical quadruple bandpass filter which the scattered light from the scattering volume under a forward and a Reverse scatter angle receives.
  • a fifth preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that the two diodes of the transmitting device each emit light in different infrared and blue ranges.
  • a sixth preferred embodiment of the scattered light smoke detector according to the invention is characterized in that the passbands of the quadruple passband filter or filters in a first infrared range of 760 nm to 850 nm, preferably 820 nm, and a second infrared range of 850 nm to 1050 nm, preferably 900 nm and in a first blue range from 330 nm to 430 nm, preferably 380 nm, and a second blue range from 430 nm to 450 nm, preferably 430 nm.
  • the reference numeral 1 denotes the side wall of the optical measuring chamber of a scattered light smoke detector, which is formed for example by a so-called labyrinth.
  • a scattering volume 2 which is shielded from external light by the said labyrinth is formed from the outside.
  • Stray light smoke detectors and their optical measuring chamber are set as known advance, it is in this context on the EP-A-0 772 170 . 1 017 034 and 1 376 504 referenced, the disclosure of which is hereby incorporated by reference.
  • two light sources 3 and 4 are arranged at the periphery of the measuring chamber, which are preferably formed by light emitting diodes (LED), of which the light source 3 blue light in the near ultraviolet to the beginning blue wavelength range of preferably approximately 430 nm and the light source 4 emits light in the near infrared region of preferably about 880 nm in the scattering volume 2.
  • LED light emitting diodes
  • Also located at the periphery of the measuring chamber is a photoreceptor 5 in front of which a wavelength-selective optical filter 6 is placed.
  • this only transmits radiation with the wavelengths emitted by the two light sources 3 and 4, and on the other hand makes no or only very little radiation pass in the region of the ambient light from the blue to the near-infrared wavelength range.
  • the wavelength-selective filter 6 is referred to below as a dual-passband filter, the term passband denoting that wavelength range of the optical spectrum in which the filter allows the light to pass unhindered or almost unhindered.
  • a dual-passband filter instead of two light sources and one dual-passband filter, three light sources with a triple-passband optical filter or four light sources with a quadruple-passband optical filter and so on can also be combined.
  • the dual-passband filter 6 not only saves a second photoreceiver but has the particular advantage that the shielding of light unwanted wavelengths such as ambient light, the basic pulse is very small and the electronic gain can be very high. Even the smallest smoke densities can be detected reliably and their origin can be clearly divided into fire or non-fire. Due to the sensitive smoke detection, the light sources require less energy, which is a significant advantage for battery operated smoke detectors.
  • the photoreceiver 5 is arranged relative to the light sources 3 and 4 so that no light emitted by these reaches the photoreceptor 5 as long as there is no aerosol in the scattering volume 2. As soon as aerosol is in the scattering volume 2, the light emitted by the light sources 3, 4 is scattered on the aerosol particles, so that scattered light reaches the photoreceptor 5. The amount of this scattered light is a measure of the number of particles in the scattering volume 2 or in other words, the smoke density.
  • Fig. 1 is located between the light emitted by the light source 3 and dashed blue radiation and received by the photoreceptor 5 and also shown in dashed blue light scattered an acute and emitted from the light source 4 infrared radiation and the photoreceptor. 5 received corresponding stray light an obtuse angle.
  • the blue radiation of the light source 3 is thus scattered backwards on the photoreceptor 5 and the infrared radiation of the light source 4 is scattered forward on the photoreceiver 5.
  • the evaluation of the backward scattering and the use of blue light both significantly increase the response of the detector to open fires.
  • Fig. 2 two variants of another embodiment of a scattered light smoke detector are shown.
  • two 2-color light sources 7 and 8 ie actually four light sources, are provided.
  • Each of the two 2-color light sources 7 and 8 emits light in the infrared and in the blue range, but in the two light sources 7 and 8, the wavelengths are not equal.
  • the light source 7 emits blue light of wavelength 430 nm and infrared radiation of wavelength 880 nm and the light source 8 blue light of wavelength 370 nm and infrared radiation of wavelength 980 nm.
  • the front of the photoreceptor 5 arranged optical filter is in the embodiment of FIG no longer a dualpassband but a quadruple passband filter 9.
  • a second photoreceiver 10 is provided with an upstream optical quadruple passband filter 11, which is also provided by that of the two 2-color light sources 7 and 8 received light emitted stray light receives.
  • the scattered light smoke detector of this second variant thus uses two 2-color light sources 7 and 8 which emit light of different wavelengths, which corresponds to four light sources with different light sources and two photoreceivers 5 and 10 with optical quadruple passband filters 9 and 11, respectively
  • two polarizing filters 12 and 13 are provided, which are arranged either between light source 7, 8 and scattering space 2 or, as shown, between scattering space 2 and the photoreceptors 5 and 10, respectively.
  • the polarizing filters 12 and 13 which of the light emitted from the light sources 7 and 8 and scattered on the particles present in the scattering space 2, pass only that portion which vibrates in a certain direction of polarization.
  • the polarizing filters 12 and 13 are wavelength independent and thus allow all light to pass whose wavelength is in the range of ultraviolet to near infrared.
  • the polarization filters allow an even more accurate determination of the type of smoke.
  • FIG. 3 shows an optical scattered-light smoke detector with a 2-color light source 7 which emits blue light of wavelength 430 nm and infrared radiation of wavelength 880 nm, and with a photoreceiver 5 with upstream dual-passband filter 6.
EP06118673A 2006-08-09 2006-08-09 Détecteur de fumée à lumière diffusée Withdrawn EP1887536A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06118673A EP1887536A1 (fr) 2006-08-09 2006-08-09 Détecteur de fumée à lumière diffusée
PCT/EP2007/058255 WO2008017698A1 (fr) 2006-08-09 2007-08-09 Détecteur de fumée à lumière diffuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06118673A EP1887536A1 (fr) 2006-08-09 2006-08-09 Détecteur de fumée à lumière diffusée

Publications (1)

Publication Number Publication Date
EP1887536A1 true EP1887536A1 (fr) 2008-02-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06118673A Withdrawn EP1887536A1 (fr) 2006-08-09 2006-08-09 Détecteur de fumée à lumière diffusée

Country Status (2)

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EP (1) EP1887536A1 (fr)
WO (1) WO2008017698A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2227068A1 (fr) * 2009-03-06 2010-09-08 Siemens Aktiengesellschaft Emission variable de rayonnements électromagnétiques à l'aide de sources de rayonnement doubles
WO2018027104A1 (fr) * 2016-08-04 2018-02-08 Carrier Corporation Détecteur de fumée
EP2759994A3 (fr) * 2013-01-23 2018-04-11 Robert Bosch Gmbh Dispositif d'alerte d'incendie
EP3321906A1 (fr) * 2016-11-11 2018-05-16 Kidde Technologies, Inc. Détection à base de fibres optiques à haute sensibilité
EP3321905A1 (fr) * 2016-11-11 2018-05-16 Kidde Technologies, Inc. Détection à base de fibres optiques à haute sensibilité
EP3321907A1 (fr) * 2016-11-11 2018-05-16 Kidde Technologies, Inc. Détection et surveillance de fumée et/ou de surchauffe à base de fibre optique pour aéronef
WO2018089474A1 (fr) * 2016-11-11 2018-05-17 Carrier Corporation Détection à base de fibres optiques à haute sensibilité
WO2018089668A3 (fr) * 2016-11-11 2018-06-14 Carrier Corporation Détection à base de fibres optiques à haute sensibilité
EP3547278A3 (fr) * 2018-03-26 2019-11-20 Kidde Technologies, Inc. Couvercle de protection pour capteur de point sans chambre
WO2020010599A1 (fr) * 2018-07-13 2020-01-16 Carrier Corporation Détection reposant sur des fibres optiques à haute sensibilité
WO2020064935A1 (fr) * 2018-09-28 2020-04-02 Siemens Schweiz Ag Détecteur de fumée à lumière diffusée comportant une led bicolore, un photocapteur et un polariseur sélectif en longueur d'onde, connecté en amont du photocapteur ou en aval de la led bicolore, et utilisation appropriée d'un tel polariseur
US11067457B2 (en) 2016-11-11 2021-07-20 Kidde Technologies, Inc. Fiber optic based smoke and/or overheat detection and monitoring for aircraft
US11127270B2 (en) 2016-11-11 2021-09-21 Carrier Corporation High sensitivity fiber optic based detection
US11132883B2 (en) 2016-11-11 2021-09-28 Carrier Corporation High sensitivity fiber optic based detection
US11145177B2 (en) 2016-11-11 2021-10-12 Carrier Corporation High sensitivity fiber optic based detection
US11151853B2 (en) 2016-11-11 2021-10-19 Carrier Corporation High sensitivity fiber optic based detection
US11176796B2 (en) 2018-07-13 2021-11-16 Carrier Corporation High sensitivity fiber optic based detection

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Publication number Priority date Publication date Assignee Title
DE102011108389A1 (de) 2011-07-22 2013-01-24 PPP "KB Pribor" Ltd. Rauchdetektor
DE102011108390B4 (de) 2011-07-22 2019-07-11 PPP "KB Pribor" Ltd. Verfahren zur Herstellung eines Rauchdetektors vom offenen Typ
JP6315641B2 (ja) * 2015-06-23 2018-04-25 華中科技大学 ２波長の散乱光信号に基づくエアロゾルの特徴パラメータの取得方法及びその使用
CN113670786B (zh) * 2021-10-21 2022-02-18 中国民航大学 一种基于锁相放大的双波长火灾烟雾探测系统及方法
CN114758469B (zh) * 2022-06-13 2022-09-02 深圳市派安科技有限公司 一种抗环境光干扰的火灾烟雾探测报警器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2108707A1 (de) * 1971-02-24 1972-09-07 Portscht R Rauchdetektor nach dem Streulichtprinzip bei zwei Wellenlängen
GB2319605A (en) * 1996-11-25 1998-05-27 Kidde Fire Protection Ltd Detector for distinguishing between smoke and other suspended particles
WO2000007161A1 (fr) * 1998-07-31 2000-02-10 Gsbs Development Corporation Detecteur de fumee
EP1408469A2 (fr) * 2002-10-07 2004-04-14 Novar GmbH Méthode de détection de feux, ainsi que détecteur pour son implémentation
US20050068527A1 (en) * 2003-09-29 2005-03-31 Nuspliger Robert J. Particulate monitor
WO2006049613A1 (fr) * 2004-10-29 2006-05-11 Simplexgrinnell Lp Detecteur de fumee multilongueur d'onde utilisant une del a lumiere blanche
US20060164241A1 (en) * 2005-01-10 2006-07-27 Nokia Corporation Electronic device having a proximity detector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2108707A1 (de) * 1971-02-24 1972-09-07 Portscht R Rauchdetektor nach dem Streulichtprinzip bei zwei Wellenlängen
GB2319605A (en) * 1996-11-25 1998-05-27 Kidde Fire Protection Ltd Detector for distinguishing between smoke and other suspended particles
WO2000007161A1 (fr) * 1998-07-31 2000-02-10 Gsbs Development Corporation Detecteur de fumee
EP1408469A2 (fr) * 2002-10-07 2004-04-14 Novar GmbH Méthode de détection de feux, ainsi que détecteur pour son implémentation
US20050068527A1 (en) * 2003-09-29 2005-03-31 Nuspliger Robert J. Particulate monitor
WO2006049613A1 (fr) * 2004-10-29 2006-05-11 Simplexgrinnell Lp Detecteur de fumee multilongueur d'onde utilisant une del a lumiere blanche
US20060164241A1 (en) * 2005-01-10 2006-07-27 Nokia Corporation Electronic device having a proximity detector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GOODMAN D S: "METHOD FOR LOCALIZING LIGHT-SCATTERED PARTICLES", IBM TECHNICAL DISCLOSURE BULLETIN, IBM CORP. NEW YORK, US, vol. 27, no. 5, October 1984 (1984-10-01), pages 3164, XP002066860, ISSN: 0018-8689 *

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2227068A1 (fr) * 2009-03-06 2010-09-08 Siemens Aktiengesellschaft Emission variable de rayonnements électromagnétiques à l'aide de sources de rayonnement doubles
WO2010100288A1 (fr) * 2009-03-06 2010-09-10 Siemens Aktiengesellschaft Dispositif détecteur pour la détection optique d'un objet, en particulier détecteur de fumées
EP2759994A3 (fr) * 2013-01-23 2018-04-11 Robert Bosch Gmbh Dispositif d'alerte d'incendie
WO2018027104A1 (fr) * 2016-08-04 2018-02-08 Carrier Corporation Détecteur de fumée
US10769921B2 (en) 2016-08-04 2020-09-08 Carrier Corporation Smoke detector
WO2018089474A1 (fr) * 2016-11-11 2018-05-17 Carrier Corporation Détection à base de fibres optiques à haute sensibilité
US11145177B2 (en) 2016-11-11 2021-10-12 Carrier Corporation High sensitivity fiber optic based detection
EP3321905A1 (fr) * 2016-11-11 2018-05-16 Kidde Technologies, Inc. Détection à base de fibres optiques à haute sensibilité
CN108072505A (zh) * 2016-11-11 2018-05-25 基德科技公司 基于高灵敏度光纤的检测
CN108072596A (zh) * 2016-11-11 2018-05-25 基德科技公司 基于高灵敏度光纤的检测
WO2018089668A3 (fr) * 2016-11-11 2018-06-14 Carrier Corporation Détection à base de fibres optiques à haute sensibilité
EP4300457A3 (fr) * 2016-11-11 2024-03-13 Carrier Corporation Détection à base de fibre optique à haute sensibilité
CN108072505B (zh) * 2016-11-11 2022-06-14 基德科技公司 基于高灵敏度光纤的检测
US11151853B2 (en) 2016-11-11 2021-10-19 Carrier Corporation High sensitivity fiber optic based detection
EP3321906A1 (fr) * 2016-11-11 2018-05-16 Kidde Technologies, Inc. Détection à base de fibres optiques à haute sensibilité
US10852202B2 (en) 2016-11-11 2020-12-01 Kidde Technologies, Inc. High sensitivity fiber optic based detection
US10943449B2 (en) 2016-11-11 2021-03-09 Carrier Corporation High sensitivity fiber optic based detection
US10957176B2 (en) 2016-11-11 2021-03-23 Carrier Corporation High sensitivity fiber optic based detection
US11067457B2 (en) 2016-11-11 2021-07-20 Kidde Technologies, Inc. Fiber optic based smoke and/or overheat detection and monitoring for aircraft
US11127270B2 (en) 2016-11-11 2021-09-21 Carrier Corporation High sensitivity fiber optic based detection
US11132883B2 (en) 2016-11-11 2021-09-28 Carrier Corporation High sensitivity fiber optic based detection
EP3321907A1 (fr) * 2016-11-11 2018-05-16 Kidde Technologies, Inc. Détection et surveillance de fumée et/ou de surchauffe à base de fibre optique pour aéronef
US11860092B2 (en) 2018-03-26 2024-01-02 Kidde Technologies, Inc. Protective cover for chamberless point sensor
EP3547278A3 (fr) * 2018-03-26 2019-11-20 Kidde Technologies, Inc. Couvercle de protection pour capteur de point sans chambre
US11176796B2 (en) 2018-07-13 2021-11-16 Carrier Corporation High sensitivity fiber optic based detection
WO2020010599A1 (fr) * 2018-07-13 2020-01-16 Carrier Corporation Détection reposant sur des fibres optiques à haute sensibilité
US11948439B2 (en) 2018-07-13 2024-04-02 Carrier Corporation High sensitivity fiber optic based detection
WO2020064935A1 (fr) * 2018-09-28 2020-04-02 Siemens Schweiz Ag Détecteur de fumée à lumière diffusée comportant une led bicolore, un photocapteur et un polariseur sélectif en longueur d'onde, connecté en amont du photocapteur ou en aval de la led bicolore, et utilisation appropriée d'un tel polariseur
US11506590B2 (en) 2018-09-28 2022-11-22 Siemens Schweiz Ag Scattered light smoke detector having a two-color LED, a photosensor, and a wavelength-selective polarizer connected upstream of the photosensor or connected downstream of the two-color LED, and suitable use of such a polarizer

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