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EP0142672A1 - Optical smoke detector - Google Patents

Optical smoke detector Download PDF

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Publication number
EP0142672A1
EP0142672A1 EP84111255A EP84111255A EP0142672A1 EP 0142672 A1 EP0142672 A1 EP 0142672A1 EP 84111255 A EP84111255 A EP 84111255A EP 84111255 A EP84111255 A EP 84111255A EP 0142672 A1 EP0142672 A1 EP 0142672A1
Authority
EP
European Patent Office
Prior art keywords
light
smoke detector
receiver
optical smoke
detector
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.)
Granted
Application number
EP84111255A
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German (de)
French (fr)
Other versions
EP0142672B1 (en
Inventor
Peer Dr.-Ing. Thilo
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to AT84111255T priority Critical patent/ATE28008T1/en
Publication of EP0142672A1 publication Critical patent/EP0142672A1/en
Application granted granted Critical
Publication of EP0142672B1 publication Critical patent/EP0142672B1/en
Expired 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
    • 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 invention relates to an optical smoke detector with a light transmitter and a light receiver arranged at an acute angle thereto, the overlapping zones of the transmitting and receiving lobes forming a measuring space in which existing smoke particles cause light scattering, which is received as reverse radiation.
  • EP-A1-031096 describes an optical arrangement for a smoke detector based on the light scattering principle. It is proposed there to arrange the transmitter and receiver at an acute angle to one another in order to achieve a small overall length, so that the largest possible overlap zone of the transmitting and receiving lobe is formed in order to be able to use the backward scattering cheaply. But this is in addition to the optical systems quite a complicated labyrinth consisting of a large number of diaphragms. To avoid reflections in the interior of the detector and to form an optical sump, these diaphragms must be arranged in a very specific way with respect to the respective axes of the transmitting and receiving lobes.
  • the object of the invention is to avoid the disadvantage of the complicated and large labyrinth and to create an optical smoke detector of the type described at the outset, which allows a simple construction without a lot of glare, the scattered light of the backward radiation being able to be used optimally.
  • a smoke detector constructed in this way has the advantage that no labyrinth with a large number of diaphragms is required to form a light sump.
  • the light outlet opening of the detector can also serve as a smoke inlet opening, so that the smoke can enter immediately and reach the measuring room if the arrangement is appropriately favorable. There is therefore no delay for the entry of smoke, as is very often the case with existing complicated labyrinths. This enables the detector to react more quickly.
  • the receiving lobe of the receiver is oriented in such a way that no extraneous light entering the detector interferes with the light receiver.
  • a plurality of light transmitters are arranged concentrically around a light receiver.
  • a plurality of light receivers can be arranged concentrically around a light transmitter. This also has the advantage that the relatively weak scattered light can be received better due to the plurality of light receivers.
  • the light reflected by smoke particles is received by several receivers and from several sides, the received signals add up, so that the signal intensity is increased.
  • the optical smoke detector it is expedient to design the receiving lobe or lobes of the receiver or the receiver almost parallel, the housing wall opposite the receiver having no opening.
  • it is not necessary there to form a light sump with the aid of diaphragms because the light emitted by the transmitter or by the transmitters comes out tightly bundled and cannot cause any disturbing reflection inside the housing, which, if there is no smoke, on the receiver could hit.
  • the arrangement of transmitter and receiver according to the invention it is possible to achieve an angle of the optical axes which can be substantially smaller than 45 * .
  • the one with it sufficient large-volume measuring room, especially when arranging several light transmitters, ensures a very high scattered light intensity compared to conventional smoke detectors with backward scattering.
  • the transmitters and the receiver (s) are arranged in such a way that the transmitting or receiving lobes are aligned approximately perpendicular to the detector base.
  • the transmission beam enters the room downwards.
  • the light outlet openings which can expediently be the same as the smoke inlet openings, are then on the front of the detector, so that a smoke which arises can penetrate directly into the interior of the detector housing.
  • the smoke detector shown schematically has a base SOK with base contacts K, a subrack BGT on which, among other things, a receiver E and two light transmitters S1 and S2 are arranged close to the lens L of the receiver E.
  • the detector M has a housing G, which has an opening oil and oil 2 opposite each of the light transmitters S1 and S2.
  • the receiving lobe EK of the light receiver E is directed in parallel so that incoming extraneous light cannot get into the light receiver.
  • the transmission lobes SKI and SK2 have a relatively narrow beam angle ⁇ .
  • the size of the light exit openings oil and ⁇ 2 is formed, so that the transmission beam in The interior of the housing cannot be reflected.
  • This arrangement allows a very acute angle ⁇ between the optical axis OAE of the receiver E and the optical axes OA1 and 0A2 of the transmitters S1 and S2. As a result, large overlap zones are formed, which result in a large-volume measurement space MR. As long as no smoke gets into the interior of the detector and thus into the measuring room, the light emitted by the light transmitters is not reflected; it can emerge unhindered. If smoke occurs, the light is scattered in the measuring room and received with the receiver on the back.
  • This arrangement represents only a simple exemplary embodiment. As already mentioned above, several transmitters can be arranged concentrically around a receiver in order to increase the efficiency of the optical smoke detector. A reverse arrangement is also possible, namely to arrange a plurality of receivers around a transmitter, the light beam of the transmitter exiting to the outside through a correspondingly arranged opening in the detector housing without causing reflections in the interior of the detector.

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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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

1. An optical smoke sensor comprising a light source (S) and a light detector (E) arranged at an acute angle (beta) in relation thereto, where the overlap zones of the transmitting lobe (SK) and the receiving lobe (EK) form a measurement zone (MR) in which smoke particles present produce a scattering of light to be received as reflected radiation, wherein the detector (E) is assigned at least one light source (S1, S2) in its direct vicinity, characterised in that a non-scattered light beam (SK1, SK2) which emanates from the light source emerges through an opening (O1, O2) in the housing (G) of the sensor (M), where the angle (alpha) of the transmitting lobe (SK) is at least sufficiently small to correspond to the outlet opening (O), and where the housing has no opening at the point to which the receiving lobe (EK) extends.

Description

Die Erfindung bezieht sich auf einen optischen Rauchmelder mit einem Lichtsender und einem im spitzen Winkel dazu angeordneten Lichtempfänger, wobei die Überlappungszonen von Sende- und Empfangskeule einen Meßraum bilden, in dem vorhandene Rauchpartikeln eine Lichtstreuung verursachen, die als Rückwärtsstrahlung empfangen wird.The invention relates to an optical smoke detector with a light transmitter and a light receiver arranged at an acute angle thereto, the overlapping zones of the transmitting and receiving lobes forming a measuring space in which existing smoke particles cause light scattering, which is received as reverse radiation.

Die meisten optischen Rauchmelder, die nach dem Lichtstreuungsprinzip arbeiten, nützen die Vorwärtsstreuung aus. Hier verursachen große Rauchaerosole einen starken Effekt, während kleine Aerosole nur wenig Streulicht verursachen. Rauchmelder, die die Rückwärtsstreuung ausnutzen, haben eine gleichmäßigere Empfindlichkeit, was einen universelleren Einsatz ermöglicht. Die schwächere Streulichtintensität erfordert jedoch einen höheren elektronischen Aufwand. Insbesondere ist bei Streulichtmeldern nach dem Prinzip der Rückwärtsstreuung der optische Aufbau recht kompliziert und aufwendig, da sonst Licht vom Sender in den Empfänger über das Meldergehäuse reflektiert wird, auch wenn kein Rauch vorhanden ist.Most optical smoke detectors, which work according to the light scattering principle, use forward scattering. Large smoke aerosols have a strong effect here, while small aerosols cause little scattered light. Smoke detectors that take advantage of backward scattering have a more uniform sensitivity, which enables them to be used more universally. The weaker scattered light intensity, however, requires more electronic effort. In particular, in the case of scattered light detectors based on the principle of backward scattering, the optical structure is quite complicated and expensive, since otherwise light is reflected from the transmitter into the receiver via the detector housing, even if there is no smoke.

In der EP-A1-031096 ist eine optische Anordnung für einen Rauchmelder nach dem Lichtstreuungsprinzip beschrieben. Es wird dort vorgeschlagen, zur Erzielung einer geringen Baulänge Sender und Empfänger in einem spitzen Winkel zueinander anzuordnen, so daß eine möglichst großvolumige Überlappungszone von Sende- und Empfangskeule gebildet wird, um die Rückwärtsstreuung günstig ausnutzen zu können. Dazu ist aber neben den optischen Systemen ein recht kompliziertes Labyrinth notwendig, das aus einer Vielzahl von Blenden besteht. Zur Vermeidung von Reflektionen im Melderinneren und zur Bildung eines optischen Sumpfes müssen diese Blenden in ganz bestimmter Weise zu den jeweiligen Achsen der Sende- und Empfangskeulen angeordnet werden.EP-A1-031096 describes an optical arrangement for a smoke detector based on the light scattering principle. It is proposed there to arrange the transmitter and receiver at an acute angle to one another in order to achieve a small overall length, so that the largest possible overlap zone of the transmitting and receiving lobe is formed in order to be able to use the backward scattering cheaply. But this is in addition to the optical systems quite a complicated labyrinth consisting of a large number of diaphragms. To avoid reflections in the interior of the detector and to form an optical sump, these diaphragms must be arranged in a very specific way with respect to the respective axes of the transmitting and receiving lobes.

Aufgabe der Erfindung ist es, den Nachteil des komplizierten und großen Labyrinths zu vermeiden und einen optischen Rauchmelder der eingangs beschriebenen Art zu schaffen, der einen einfachen Aufbau ohne viel Blenden erlaubt, wobei das Streulicht der Rückwärtsstrahlung optimal genutzt werden kann.The object of the invention is to avoid the disadvantage of the complicated and large labyrinth and to create an optical smoke detector of the type described at the outset, which allows a simple construction without a lot of glare, the scattered light of the backward radiation being able to be used optimally.

Diese Aufgabe wird bei einem eingangs beschriebenen optischen Rauchmelder erfindungsgemäß dadurch gelöst, daß dem Empfänger in unmittelbarer Nähe mindestens ein Lichtsender zugeordnet ist, dessen nicht gestreuter Lichtstrahl durch eine im Gehäuse des Melders angebrachte Öffnung austritt, wobei der Winkel der Sendekeule zumindest so klein ist, daß er der Austrittsöffnung entspricht.This object is achieved according to the invention in an optical smoke detector described in the introduction in that at least one light transmitter is assigned in the immediate vicinity of the receiver, the light beam of which is not scattered exiting through an opening made in the housing of the detector, the angle of the transmitting lobe being at least so small that it corresponds to the outlet opening.

Ein derartig aufgebauter Rauchmelder hat den Vorteil, daß kein Labyrinth mit einer Vielzahl von Blenden zur Bildung eines Lichtsumpfes erforderlich ist. Die Lichtaustrittsöffnung des Melders kann gleichzeitig als Raucheintrittsöffnung dienen, so daß bei entsprechend günstiger Anordnung der Rauch unmittelbar eintreten und zum Meßraum gelangen kann. Es tritt also für den Raucheintritt keine Verzögerung ein, wie dies sehr häufig bei vorhandenen komplizierten Labyrinths der Fall ist. Dadurch kann der Melder schneller reagieren. Bei der erfindungsgemäßen Anordnung ist die Empfangskeule des Empfängers so ausgerichtet, daß kein in das Melderinnere eindringende Fremdlicht den Lichtempfänger stört. In einer zweckmäßigen Weiterbildung der Erfindung sind mehrere Lichtsender konzentrisch um einen Lichtempfänger angeordnet. Dies hat den Vorteil, daß der Meßraum wesentlich größer wird. Ein weiterer Vorteil besteht darin, daß durch das Ausleuchten des Meßraums mit mehreren Sendern die Streulichtintensität der Rückwärtsstrahlung wesentlich erhöht wird. Ferner erlaubt dieser Aufbau eine sehr dichte Anordnung der Lichtsender um den Lichtempfänger, so daß dadurch die optischen Achsen der Lichtsender in einem sehr spitzen Winkel zur optischen Achse des Lichtempfängers angeordnet sind. Dadurch wird ein sehr großvolumiger Meßraum gebildet.A smoke detector constructed in this way has the advantage that no labyrinth with a large number of diaphragms is required to form a light sump. The light outlet opening of the detector can also serve as a smoke inlet opening, so that the smoke can enter immediately and reach the measuring room if the arrangement is appropriately favorable. There is therefore no delay for the entry of smoke, as is very often the case with existing complicated labyrinths. This enables the detector to react more quickly. In the arrangement according to the invention, the receiving lobe of the receiver is oriented in such a way that no extraneous light entering the detector interferes with the light receiver. In an expedient development of the invention, a plurality of light transmitters are arranged concentrically around a light receiver. This has the advantage that the measuring space becomes significantly larger. Another advantage is that by illuminating the measuring room with several transmitters, the scattered light intensity of the reverse radiation is significantly increased. Furthermore, this structure permits a very dense arrangement of the light transmitters around the light receiver, so that the optical axes of the light transmitters are thereby arranged at a very acute angle to the optical axis of the light receiver. This creates a very large-volume measuring room.

In einer weiteren Ausgestaltung der Erfindung können mehrere Lichtempfänger konzentrisch um einen Lichtsender angeordnet werden. Dabei ergibt sich ebenfalls der Vorteil, daß aufgrund der Mehrzahl von Lichtempfängern das relativ schwache Streulicht besser empfangen werden kann. Das von Rauchpartikeln reflektierte Licht wird mit mehreren Empfängern und von mehreren Seiten empfangen, die Empfangssignale addieren sich, so daß dadurch die Signalintensität vergrößert wird.In a further embodiment of the invention, a plurality of light receivers can be arranged concentrically around a light transmitter. This also has the advantage that the relatively weak scattered light can be received better due to the plurality of light receivers. The light reflected by smoke particles is received by several receivers and from several sides, the received signals add up, so that the signal intensity is increased.

Bei dem erfindungsgemäßen optischen Rauchmelder ist es zweckmäßig die Empfangskeule bzw. -keulen des Empfängers bzw. der Empfänger nahezu parallel auszubilden, wobei die dem Empfänger gegenüberliegende Gehäusewand keine Öffnung aufweist. Es ist dort jedoch nicht erforderlich, mit Hilfe von Blenden einen Lichtsumpf auszubilden, weil das vom Sender bzw. von den Sendern abgestrahlte Licht eng gebündelt nach außen tritt und im Gehäuseinneren keine störende Reflektion verursachen kann, die bei nicht νorhan÷ denen Rauch auf dem Empfänger treffen könnte. Mit der erfindungsgemäßen Anordnung von Sender und Empfänger ist es möglich, einen Winkel der optischen Achsen zu erzielen, der wesentlich kleiner als 45* sein kann. Der damit erreichte großvolumige Meßraum, insbesondere bei Anordnung von mehreren Lichtsendern, gewährleistet eine sehr hohe Streulichtintensität gegenüber herkömmlichen Rauchmeldern mit Rückwärtsstreuung.In the optical smoke detector according to the invention, it is expedient to design the receiving lobe or lobes of the receiver or the receiver almost parallel, the housing wall opposite the receiver having no opening. However, it is not necessary there to form a light sump with the aid of diaphragms, because the light emitted by the transmitter or by the transmitters comes out tightly bundled and cannot cause any disturbing reflection inside the housing, which, if there is no smoke, on the receiver could hit. With the arrangement of transmitter and receiver according to the invention, it is possible to achieve an angle of the optical axes which can be substantially smaller than 45 * . The one with it sufficient large-volume measuring room, especially when arranging several light transmitters, ensures a very high scattered light intensity compared to conventional smoke detectors with backward scattering.

Bei dem erfindungsgemäßen Rauchmelder ist es vorteilhaft, die Sender und den bzw. die Empfänger so anzuordnen, daß die Sende- bzw. Empfangskeulen in etwa senkrecht zum Meldersockel ausgerichtet sind. Bei einem an einer Raumdecke montierten Rauchmelder tritt der Sendestrahl nach unten in den Raum. Die Lichtaustrittsöffnungen, die zweckmäßigerweise gleich die Raucheintrittsöffnungen sein können, sind dann an der Melderfrontseite, so daß ein entstehender Rauch unmittelbar in das Innere des Meldergehäuses eindringen kann.In the smoke detector according to the invention, it is advantageous to arrange the transmitters and the receiver (s) in such a way that the transmitting or receiving lobes are aligned approximately perpendicular to the detector base. With a smoke detector mounted on a ceiling, the transmission beam enters the room downwards. The light outlet openings, which can expediently be the same as the smoke inlet openings, are then on the front of the detector, so that a smoke which arises can penetrate directly into the interior of the detector housing.

Anhand eines Ausführungsbeispiels und der Zeichnung wird der erfindungsgemäße Rauchmelder im folgenden erläutert. Dabei zeigt die

  • Fig. 1 eine Prinzipdarstellung des Rauchmelders und
  • Fig. 2 entsprechend dazu die Draufsicht.
The smoke detector according to the invention is explained below using an exemplary embodiment and the drawing. The shows
  • Fig. 1 is a schematic diagram of the smoke detector and
  • Fig. 2 corresponding to the top view.

Der schematisch dargestellte Rauchmelder besitzt einen Sockel SOK mit Sockelkontakten K einen Baugruppenträger BGT auf dem u.a. ein Empfänger E und entsprechend dicht bei der Linse L des Empfängers E zwei Lichtsender Sl und S2 angeordnet sind. Der Melder M weist ein Gehäuse G auf, das gegenüber von den Lichtsendern Sl und S2 jeweils eine Öffnung Öl und Ö2 besitzt. Mit Hilfe der Linse wird die Empfangskeule EK des Lichtempfängers E parallel gerichtet, so daß eintretendes Fremdlicht nicht in den Lichtempfänger gelangen kann. Die Sendekeulen SKI und SK2 besitzen einen verhältnismäßig schmalen Bündelungswinkelα . Entsprechend diesem Winkelα ist die Größe der Lichtaustrittsöffnungen Öl und Ö2 ausgebildet, so daß der Sendestrahl im Gehäuseinneren nicht reflektiert werden kann. Diese Anordnung erlaubt einen sehr spitzen Winkelβ zwischen der optischen Achse OAE des Empfängers E und den optischen Achsen OA1 und 0A2 der Sender S1 und S2. Dadurch werden große Überlappungszonen gebildet, die einen großvolumigen Meßraum MR ergeben. Solange kein Rauch in das Melderinnere und damit in den Meßraum gelangt, wird das von den Lichtsendern abgestrahlte Licht nicht reflektiert; es kann ungehindert austreten. Tritt Rauch ein, so wird in dem Meßraum das Licht gestreut und mit dem rückseitig angeordneten Empfänger empfangen. Diese Anordnung stellt lediglich ein einfaches Ausführungsbeispiel dar. Wie oben schon erwähnt können um einen Empfänger mehrere Sender konzentrisch angeordnet werden um den Wirkungsgrad des optisches Rauchmelders zu erhöhen. Es ist ebenso eine umgekehrte Anordnung möglich, nämlich um einen Sender mehrere Empfänger herum anzuordnen, wobei der Lichtstrahl des Senders durch eine entsprechend angeordnete Öffnung im Meldergehäuse nach außen austritt ohne Reflektionen im Melderinneren zu verursachen.The smoke detector shown schematically has a base SOK with base contacts K, a subrack BGT on which, among other things, a receiver E and two light transmitters S1 and S2 are arranged close to the lens L of the receiver E. The detector M has a housing G, which has an opening oil and oil 2 opposite each of the light transmitters S1 and S2. With the help of the lens, the receiving lobe EK of the light receiver E is directed in parallel so that incoming extraneous light cannot get into the light receiver. The transmission lobes SKI and SK2 have a relatively narrow beam angle α. Corresponding to this angle α, the size of the light exit openings oil and Ö2 is formed, so that the transmission beam in The interior of the housing cannot be reflected. This arrangement allows a very acute angle β between the optical axis OAE of the receiver E and the optical axes OA1 and 0A2 of the transmitters S1 and S2. As a result, large overlap zones are formed, which result in a large-volume measurement space MR. As long as no smoke gets into the interior of the detector and thus into the measuring room, the light emitted by the light transmitters is not reflected; it can emerge unhindered. If smoke occurs, the light is scattered in the measuring room and received with the receiver on the back. This arrangement represents only a simple exemplary embodiment. As already mentioned above, several transmitters can be arranged concentrically around a receiver in order to increase the efficiency of the optical smoke detector. A reverse arrangement is also possible, namely to arrange a plurality of receivers around a transmitter, the light beam of the transmitter exiting to the outside through a correspondingly arranged opening in the detector housing without causing reflections in the interior of the detector.

Claims (6)

1. Optischer Rauchmelder mit einem Lichtsender (S) und einem im spitzen Winkel (ß) dazu angeordneten Lichtempfänger (E), wobei die Überlappungszonen von Sende- (SK) und Empfangskeule (EK) einen Meßraum (MR) bilden, in dem vorhandene Rauchpartikeln eine Lichtstreuung verursachen, die als Rückwärtsstrahlung empfangen wird, dadurch gekennzeichnet, daß dem Empfänger (E) in unmittelbarer Nähe mindestens ein Lichtsender (Sl, S2) zugeordnet ist, dessen nicht gestreuter Lichtstrahl (SK1, SK2) durch eine im Gehäuse (G) des Melders (M) angebrachte Öffnung (Öl, Ö2) austritt, wobei der Winkel (α) der Sendekeule (SK) zumindest so klein ist, daß er der Austrittsöffnung (Ö) entspricht.1. Optical smoke detector with a light transmitter (S) and a light receiver (E) arranged at an acute angle (β) thereto, the overlapping zones of the transmitting (SK) and receiving lobes (EK) forming a measuring space (MR) in which smoke particles are present cause light scattering, which is received as backward radiation, characterized in that the receiver (E) is assigned in the immediate vicinity at least one light transmitter (Sl, S2), the non-scattered light beam (SK1, SK2) by a in the housing (G) of the Detector (M) opening (oil, Ö2) exits, the angle (α) of the transmitting lobe (SK) is at least so small that it corresponds to the outlet opening (Ö). 2. Optischer Rauchmelder nach Anspruch 1, dadurch gekennzeichnet, daß mehrere Lichtsender (Sl, S2 ...) konzentrisch um einen Lichtempfänger (E) angeordnet sind.2. Optical smoke detector according to claim 1, characterized in that a plurality of light transmitters (Sl, S2 ...) are arranged concentrically around a light receiver (E). 3. Optischer Rauchmelder nach Anspruch 1, dadurch gekennzeichnet , daß mehrere Lichtempfänger (El, E2 ...) vorgesehen sind, die konzentrisch um einen Lichtsender (S) angeordnet sind.3. Optical smoke detector according to claim 1, characterized in that a plurality of light receivers (El, E2 ...) are provided, which are arranged concentrically around a light transmitter (S). 4. Optischer Rauchmelder nach Anspruch 1 oder 2, dadurch ggekennzeichnet,, daß die Empfangskeule (EK) nahezu parallel ist.4. Optical smoke detector according to claim 1 or 2, characterized in that the receiving lobe (EK) is almost parallel. 5. Optischer Rauchmelder mit einem Lichtsender (S) und einem im spitzen Winkel (ß) dazu angeordnetem Lichtempfänger (E), dadurch gekennzeichnet , daß der spitze Winkel (β) wesentlich kleiner als 45° ist.5. Optical smoke detector with a light transmitter (S) and a light receiver (E) arranged at an acute angle (β) thereto, characterized in that the acute angle (β) is substantially less than 45 °. 6. Optischer Rauchmelder nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die Sende- und Empfangskeulen (SK, EK) im wesentlichen senkrecht zum Meldersockel (SOK) ausgerichtet sind.6. Optical smoke detector according to one of the preceding claims, characterized in that the transmitting and receiving lobes (SK, EK) are aligned substantially perpendicular to the detector base (SOK).
EP84111255A 1983-09-23 1984-09-20 Optical smoke detector Expired EP0142672B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111255T ATE28008T1 (en) 1983-09-23 1984-09-20 OPTICAL SMOKE DETECTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833334545 DE3334545A1 (en) 1983-09-23 1983-09-23 OPTICAL SMOKE DETECTOR
DE3334545 1983-09-23

Publications (2)

Publication Number Publication Date
EP0142672A1 true EP0142672A1 (en) 1985-05-29
EP0142672B1 EP0142672B1 (en) 1987-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111255A Expired EP0142672B1 (en) 1983-09-23 1984-09-20 Optical smoke detector

Country Status (3)

Country Link
EP (1) EP0142672B1 (en)
AT (1) ATE28008T1 (en)
DE (2) DE3334545A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
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RU2141133C1 (en) * 1998-10-14 1999-11-10 Закрытое акционерное общество "Инновационная фирма "ИРСЭТ - Центр" Smoke detector
EP1017034A3 (en) * 1998-09-14 2000-08-02 Siemens Building Technologies AG Optical smoke detector according to the extinguish principle and method for compensating the temperature drift
AU763116B2 (en) * 1998-09-14 2003-07-10 Siemens Building Technologies Ag Light absorption smoke detector
RU2231238C1 (en) * 2002-11-05 2004-06-20 Закрытое акционерное общество "АРГУС-СПЕКТР" Overhead fire-alarm smoke detector housing for horizontally mounted smoke chamber
RU2417450C2 (en) * 2009-07-27 2011-04-27 Общество с ограниченной ответственностью "Электротехника и Автоматика" (ООО "Электротехника и Автоматика") Fire smoke detector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3831654A1 (en) * 1988-09-17 1990-03-22 Hartwig Beyersdorf OPTICAL SMOKE DETECTOR
DE4414166C1 (en) * 1994-04-22 1995-12-07 Lorenz Mesgeraetebau Method and device for measuring light scattering on particles
ATE223604T1 (en) * 1996-07-22 2002-09-15 Siemens Building Tech Ag SMOKE DETECTOR
ES2185728T3 (en) * 1996-07-22 2003-05-01 Siemens Building Tech Ag SMOKE DETECTOR.
RU2258259C2 (en) * 2003-06-05 2005-08-10 Общество с ограниченной ответственностью "Конструкторское бюро пожарной автоматики" (ООО "КБПА") Smoke alarm
RU2301455C2 (en) * 2005-06-10 2007-06-20 Закрытое Акционерное общество "НТЦ "Теко" Horizontally ventilated smoke chamber
RU2324235C1 (en) * 2006-09-12 2008-05-10 Александр Васильевич Гвоздырев Dust detector for gaseous medium
RU2438185C1 (en) * 2010-10-20 2011-12-27 Александр Васильевич Гвоздырев Addressable detector with external smoke chamber
RU2450361C1 (en) * 2010-12-28 2012-05-10 Общество с ограниченной ответственностью "Группа компаний "РУБЕЖ" Optical electric fire-smoke detector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB729140A (en) * 1952-04-04 1955-05-04 Pyrene Co Ltd Improvements relating to smoke indicators
DE2632876A1 (en) * 1975-07-21 1977-01-27 Gen Signal Corp Smoke detector using LED - light is reflected by smoke particles onto adjacent photodetector with rectifier layer for threshold device
US4103997A (en) * 1975-07-15 1978-08-01 Matsushita Electric Works, Ltd. Light scattering type smoke detector
EP0031096A1 (en) * 1979-12-20 1981-07-01 Heimann GmbH Optical arrangement for a smoke detector using the light scattering principle
GB1592475A (en) * 1977-09-06 1981-07-08 Cheung King Fung Smoke detectors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB729140A (en) * 1952-04-04 1955-05-04 Pyrene Co Ltd Improvements relating to smoke indicators
US4103997A (en) * 1975-07-15 1978-08-01 Matsushita Electric Works, Ltd. Light scattering type smoke detector
DE2632876A1 (en) * 1975-07-21 1977-01-27 Gen Signal Corp Smoke detector using LED - light is reflected by smoke particles onto adjacent photodetector with rectifier layer for threshold device
GB1592475A (en) * 1977-09-06 1981-07-08 Cheung King Fung Smoke detectors
EP0031096A1 (en) * 1979-12-20 1981-07-01 Heimann GmbH Optical arrangement for a smoke detector using the light scattering principle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1017034A3 (en) * 1998-09-14 2000-08-02 Siemens Building Technologies AG Optical smoke detector according to the extinguish principle and method for compensating the temperature drift
AU763116B2 (en) * 1998-09-14 2003-07-10 Siemens Building Technologies Ag Light absorption smoke detector
RU2141133C1 (en) * 1998-10-14 1999-11-10 Закрытое акционерное общество "Инновационная фирма "ИРСЭТ - Центр" Smoke detector
RU2231238C1 (en) * 2002-11-05 2004-06-20 Закрытое акционерное общество "АРГУС-СПЕКТР" Overhead fire-alarm smoke detector housing for horizontally mounted smoke chamber
RU2417450C2 (en) * 2009-07-27 2011-04-27 Общество с ограниченной ответственностью "Электротехника и Автоматика" (ООО "Электротехника и Автоматика") Fire smoke detector

Also Published As

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DE3464424D1 (en) 1987-07-30
ATE28008T1 (en) 1987-07-15
DE3334545A1 (en) 1985-04-04
EP0142672B1 (en) 1987-06-24

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