EP0926646B1 - Détecteur de fumée optique - Google Patents

Détecteur de fumée optique Download PDF

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Publication number
EP0926646B1
EP0926646B1 EP97122894A EP97122894A EP0926646B1 EP 0926646 B1 EP0926646 B1 EP 0926646B1 EP 97122894 A EP97122894 A EP 97122894A EP 97122894 A EP97122894 A EP 97122894A EP 0926646 B1 EP0926646 B1 EP 0926646B1
Authority
EP
European Patent Office
Prior art keywords
light
receiver
smoke alarm
light source
alarm according
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.)
Expired - Lifetime
Application number
EP97122894A
Other languages
German (de)
English (en)
Other versions
EP0926646B8 (fr
EP0926646A1 (fr
Inventor
Kurt Dr. Hess
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 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
Priority to EP97122894A priority Critical patent/EP0926646B8/fr
Priority to DK97122894T priority patent/DK0926646T3/da
Priority to AT97122894T priority patent/ATE284603T1/de
Priority to PT97122894T priority patent/PT926646E/pt
Priority to ES97122894T priority patent/ES2221946T3/es
Application filed by Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to DE59711621T priority patent/DE59711621D1/de
Publication of EP0926646A1 publication Critical patent/EP0926646A1/fr
Application granted granted Critical
Publication of EP0926646B1 publication Critical patent/EP0926646B1/fr
Publication of EP0926646B8 publication Critical patent/EP0926646B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 a detector insert, an optics module and an evaluation circuit, the optics module being a light source, a Measuring chamber and a light receiver connected to the evaluation circuit.
  • the invention is now intended to provide a stray light detector with a significantly improved Response behavior to open fires can be specified.
  • the wavelength of the radiation emitted by the light source in the range of blue or red light and is preferably 460 nm or 660 nm.
  • Backscatter is known to be scattered light detectors with a scattering angle of over 90 °, which better recognize open fires, but where the receiver signal only one Fraction of the receiver signal from forward spreaders is.
  • the reason for this improved Detection of open fires is likely to be due to the shorter wavelengths Smaller aerosols, such as those that arise especially in the case of open fires, very much can be better detected.
  • the optics module is designed so that it goes from the light receiver to the evaluation circuit emitted signal a function of the impinging on it, in a Plane is polarized stray light.
  • the light source and the light receiver are arranged such that their optical axes lie in a common horizontal plane and to each other are kinked.
  • labyrinth parts serve the radiation of the light source and the Limit the field of view of the light receiver and light coming from outside at the entrance in the measuring chamber. The better the labyrinth fulfills these functions, the more it hinders the penetration of smoke into the measuring chamber, thereby the detector may only respond after a certain delay.
  • the invention should now also the smoke penetration behavior in the measuring chamber can be significantly improved.
  • Smoke detector solved that the arrangement of light source and light receiver is selected so that the optical axes of the transmitter and the receiver Beam path spanned plane runs obliquely to the horizontal plane.
  • the axis of the beam path on the receiver side preferably runs vertically to that of the beam path on the transmitter side.
  • the field of view of the receiver depends on the "line of sight” the bottom or the cover of the measuring chamber or the detector can be limited to the labyrinth can be almost completely dispensed with, so that a practically unhindered Smoke entry into the measuring chamber is made possible.
  • a polarization filter is arranged in front of the light receiver 5, which only contains the polarization component perpendicular to the scattering plane (this is the plane in which the optical axes of light source 4 and light receiver 5) passes, or if the measuring chamber 3 is exposed to polarized light.
  • polarization filters and polarized light is applied to CH-A-682 428 directed.
  • the switch 14 is controlled by the control stage 10 in such a way that the received signal U e is transmitted to one integrator, for example to the integrator 15, during the duration of the pulses and to the other integrator, for example to the integrator 15 ', during the pulse pauses. is directed. During any pauses in transmission between the pulse trains or pulse packets, the switch 14 remains in a neutral position in which neither of the two integrators 15 or 15 'is acted upon by the received signal.
  • the switch 14 is preferably formed by a controlled switch.
  • the useful signal U n is fed on the one hand to a comparator 18 and on the other hand to the one input of a second modulator 19, the second input of which is connected to the control stage 10 and the output of which is led via a resistor 20 to the input of the current / voltage converter 12.
  • This control loop can be compared to a self-balancing bridge circuit. If properly set up, this circuit allows the resolution of photo currents down to the picoampere range.
  • the comparator 18 compares the useful signal U n with at least one threshold value and delivers a corresponding signal to an alarm output 21 when it
  • a measuring channel it is also possible instead of a measuring channel to provide two measuring channels, one of which, for example, has a conventional design is and an infrared transmitter diode 4 and a receive diode 5 and the other one contains colored LED and / or a polarization filter 22.
  • the polarization filter 22 can also be arranged between transmitter diode 4 and measuring chamber 3.
  • the optical axis of the beam path on the receiver side runs vertically from top to bottom, but it could also run in the opposite direction and their angle of inclination to the optical axis of the beam path could also be be smaller or larger than 90 °. It is essential that the optical axis of the receiver Ray goose is oriented so that the recipient's field of vision is not through one component that inhibits the entry of smoke into the measuring chamber must be limited.
  • the detector insert 2 has essentially the shape of a flat, open at the top round box, in the interior of a circuit board (not shown) with the evaluation electronics is arranged.
  • a detector hood 23 is put over the detector insert 2, which is provided with smoke entry slots 24.
  • the cover 27 carries an upwardly projecting against the bottom of the detector insert 2 Light barrier 28.
  • the measuring chamber is between the light source 4 and the light barrier 28 3 formed.
  • the side wall 8 of the lid 27 is largely except for the light barrier 28 open, which ensures that smoke can enter the measuring chamber as freely as possible 3 is guaranteed.
  • the light receiver 5, the aperture 30 and optionally the lens 31 define the optical axis of the beam path on the receiver side, which runs in the vertical direction and perpendicularly crosses the horizontal optical axis on the transmitter side.
  • the light receiver 5 thus looks, as it were, from above onto the beam of rays emitted by the light source 4.
  • the spreading space forming the actual measuring range in the cutting area of the senderund of the radiation beam on the receiver side is designated by reference numeral 32.
  • the field of view of the light receiver 5 is through the bottom of the cover 27 and through the detector hood 23 limits and direct irradiation of the light receiver 5 with External light is prevented by the aperture 30.
  • the side wall 27 loses their previous functions and can be omitted, reducing the penetration behavior of smoke and aerosols in the measuring chamber 3 is markedly improved.
  • the above a short area of the side wall of the cover 27 still existing and from the Functionally not necessarily necessary light barrier 28 has the penetration behavior practically no influence from smoke.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Claims (10)

  1. Détecteur de fumée optique, comportant une pièce (2) rapportée de détecteur, un module (1) optique et un circuit d'exploitation, le module (1) optique comportant une source (4, 4') de lumière, une chambre (3) de mesure et un récepteur (5, 5') de lumière relié au circuit d'exploitation, caractérisé en ce que la source (4) de lumière est réalisée pour l'émission d'un rayonnement dans le domaine de longueur d'onde de la lumière visible.
  2. Détecteur de fumée suivant la revendication 1, caractérisé en ce que la longueur d'onde du faisceau émis par la source (4) de lumière est dans le domaine de la lumière bleue ou rouge et est égale de préférence à 460 nm, respectivement 660 nm.
  3. Détecteur de fumée suivant la revendication 1 ou 2, caractérisé en ce que le module (1) optique est réalisé de manière que le signal fourni par le récepteur (5') de lumière au circuit d'exploitation soit une fonction de la lumière dispersée qui y arrive, polarisée dans un plan.
  4. Détecteur de fumée suivant l'une des revendications 1 à 3, caractérisé en ce qu'il est prévu deux canaux de mesure ayant un émetteur (4) de lumière et deux récepteurs (5, 5', 5") de lumière ou deux émetteurs (4) de lumière et un récepteur (5) de lumière, un filtre de polarisation étant monté dans l'un des canaux de mesure.
  5. Détecteur de fumée suivant la revendication 4, caractérisé en ce que, pour un dispositif à deux émetteurs (4) de lumière et un récepteur (5) de lumière, l'un des émetteurs (4) de lumière est formé d'une diode émettant de la lumière de couleur.
  6. Détecteur de fumée suivant la revendication 4, caractérisé en ce que, pour un dispositif à deux récepteurs (5, 5', 5") de lumière, l'un des récepteurs (5") de lumière est alimenté en lumière dispersée en arrière.
  7. Détecteur de fumée suivant l'une des revendications 1 à 6, caractérisé en ce qu'il s'effectue dans le circuit d'exploitation une superposition du signal le du récepteur (5, 5') de lumière à un signal Ik de compensation, qui est choisi de manière que le signal du récepteur (5, 5') de lumière soit réglé à la valeur zéro.
  8. Détecteur de fumée suivant l'une des revendications 1 à 7, caractérisé en ce que la disposition de la source (4, 4') de lumière et du récepteur (5, 5') de lumière est choisie de telle manière que le plan s'étendant entre les axes optiques de la marche des rayons du côté de l'émetteur et du côté du récepteur s'étend en biais par rapport au plan horizontal.
  9. Détecteur de fumée suivant la revendication 8, caractérisé en ce que l'axe de la marche des rayons du côté du récepteur s'étend verticalement par rapport à celui de la marche des rayons du côté de l'émetteur.
  10. Détecteur de fumée suivant la revendication 9, caractérisé en ce que la pièce 2 rapportée de détecteur comporte sur son fond un boítier (25) comportant la source (4) de lumière et des moyens (26) de maintien pour un couvercle (27) limitant la chambre (3) de mesure vers le bas et ayant une paroi (8) latérale ouverte dans une grande mesure, et en ce que le récepteur (5) de lumière est monté dans la région du fond de la pièce (2) rapportée de détecteur.
EP97122894A 1997-12-24 1997-12-24 Détecteur de fumée optique Expired - Lifetime EP0926646B8 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DK97122894T DK0926646T3 (da) 1997-12-24 1997-12-24 Optisk rögdetektor
AT97122894T ATE284603T1 (de) 1997-12-24 1997-12-24 Optischer rauchmelder
PT97122894T PT926646E (pt) 1997-12-24 1997-12-24 Detector optico de fumo
ES97122894T ES2221946T3 (es) 1997-12-24 1997-12-24 Detector de humo optico.
EP97122894A EP0926646B8 (fr) 1997-12-24 1997-12-24 Détecteur de fumée optique
DE59711621T DE59711621D1 (de) 1997-12-24 1997-12-24 Optischer Rauchmelder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97122894A EP0926646B8 (fr) 1997-12-24 1997-12-24 Détecteur de fumée optique

Publications (3)

Publication Number Publication Date
EP0926646A1 EP0926646A1 (fr) 1999-06-30
EP0926646B1 true EP0926646B1 (fr) 2004-05-12
EP0926646B8 EP0926646B8 (fr) 2004-09-22

Family

ID=8227883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97122894A Expired - Lifetime EP0926646B8 (fr) 1997-12-24 1997-12-24 Détecteur de fumée optique

Country Status (6)

Country Link
EP (1) EP0926646B8 (fr)
AT (1) ATE284603T1 (fr)
DE (1) DE59711621D1 (fr)
DK (1) DK0926646T3 (fr)
ES (1) ES2221946T3 (fr)
PT (1) PT926646E (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19902319B4 (de) * 1999-01-21 2011-06-30 Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 Streulichtbrandmelder
EP1087352A1 (fr) * 1999-09-22 2001-03-28 Siemens Building Technologies AG Détecteur optique de fumée
PT1103937E (pt) * 1999-11-19 2005-09-30 Siemens Building Tech Ag Detector de incendios
CA2293830C (fr) * 1999-12-31 2008-07-29 Digital Security Controls Ltd. Detecteur de fumee photo-electrique et chambre connexe
EP1376504B1 (fr) 2002-06-20 2006-02-22 Siemens Schweiz AG Capteur de fumée par diffusion de lumière
ATE318000T1 (de) 2002-06-20 2006-03-15 Siemens Schweiz Ag Brandmelder
DE102005010454A1 (de) 2005-03-08 2006-09-21 Robert Bosch Gmbh Gassensor
EP1732049A1 (fr) 2005-06-10 2006-12-13 Siemens S.A.S. Détecteur de feux ou de fumée à haute rejection de fausses alarmes
EP3096130B1 (fr) 2014-10-13 2021-05-26 Universität Duisburg-Essen Dispositif destine a l'identification d'aerosols
EP3029647B1 (fr) * 2014-12-04 2017-05-31 Siemens Schweiz AG Détecteur de fumée à écran diffusant ouvert, notamment équipé d'une LED Side-looker
US11151853B2 (en) 2016-11-11 2021-10-19 Carrier Corporation High sensitivity fiber optic based detection
EP3539108B1 (fr) 2016-11-11 2020-08-12 Carrier Corporation Détection reposant sur des fibres optiques à haute sensibilité
ES2919300T3 (es) 2016-11-11 2022-07-22 Carrier Corp Detección basada en fibra óptica de alta sensibilidad
US11127270B2 (en) 2016-11-11 2021-09-21 Carrier Corporation High sensitivity fiber optic based detection
US10957176B2 (en) 2016-11-11 2021-03-23 Carrier Corporation High sensitivity fiber optic based detection
EP3857207B1 (fr) 2018-09-28 2023-10-25 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
CN111795951A (zh) * 2020-05-28 2020-10-20 南京颗粒光电科技有限公司 一种新能源电池热失控检测用一体化传感器及预警方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951459C2 (de) * 1979-12-20 1984-03-29 Heimann Gmbh, 6200 Wiesbaden Optische Anordnung für einen Rauchmelder nach dem Lichtstreuungsprinzip
CH683464A5 (de) * 1991-09-06 1994-03-15 Cerberus Ag Optischer Rauchmelder mit aktiver Ueberwachung.
CH682428A5 (de) * 1991-09-13 1993-09-15 Cerberus Ag Optischer Rauchmelder.

Also Published As

Publication number Publication date
DE59711621D1 (de) 2004-06-17
DK0926646T3 (da) 2004-09-20
ES2221946T3 (es) 2005-01-16
ATE284603T1 (de) 2004-05-15
EP0926646B8 (fr) 2004-09-22
PT926646E (pt) 2004-10-29
EP0926646A1 (fr) 1999-06-30

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