[go: up one dir, main page]

EP1012805B1 - Smoke detector - Google Patents

Smoke detector Download PDF

Info

Publication number
EP1012805B1
EP1012805B1 EP98928058A EP98928058A EP1012805B1 EP 1012805 B1 EP1012805 B1 EP 1012805B1 EP 98928058 A EP98928058 A EP 98928058A EP 98928058 A EP98928058 A EP 98928058A EP 1012805 B1 EP1012805 B1 EP 1012805B1
Authority
EP
European Patent Office
Prior art keywords
radiation
smoke
smoke detector
detector according
hollow ellipsoid
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
EP98928058A
Other languages
German (de)
French (fr)
Other versions
EP1012805A1 (en
Inventor
Ulrich Oppelt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1012805A1 publication Critical patent/EP1012805A1/en
Application granted granted Critical
Publication of EP1012805B1 publication Critical patent/EP1012805B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 invention is based on the genus, as in the independent Claim 1 specified.
  • Smoke detectors are generally used for early fire detection used.
  • One method is to detect smoke particles in the measurement of radiation scattered on smoke particles.
  • Such smoke detectors based on the scattered radiation principle usually use the forward scattering method, because it means bigger signals at the radiation receiver can be achieved.
  • Such a smoke detector consists of one Radiation transmitter (usually pulsed), a lens for Bundling the rays and a radiation receiver to Example of a photodiode, possibly with a lens to capture the scattering cone of the scattered radiation.
  • Radiation receivers and radiation transmitters have no direct Line of sight, but are by appropriate mechanical Measures optically separated. Between the Radiation transmission direction and the reception direction lies obtuse angle, and the scattering angle at the detected Smoke particles are also dull.
  • a disadvantage of the known methods is that only a small proportion of the scattered radiation on the radiation receiver falls while the remaining scattered radiation for the measurement is lost. Furthermore, only each one of the preferred measurement effects, forward or backward scattering, exploited.
  • WO-A-8909392 is based on the scattered radiation principle based pollution detector known, the measuring chamber from a inside mirrored tube with an elliptical cross section and where the Radiation transmitter emits along a focal point and the radiation receiver is attached to the second focal point at the end of the tube.
  • the invention allows almost all of the smoke particles Scattered radiation as a radiation receiver Feed measurement signal. This includes both the forward scattered Radiation, the backscattered radiation, as also the scattered radiation from all intermediate areas. In order to the measurement becomes more sensitive overall since there is almost no loss caused by radiation not captured.
  • Smoke detectors continue to take into account that caused by different particle diameters give rise to scattering properties.
  • a light-emitting diode can be used as the radiation transmitter Semiconductor laser or a flash lamp may be provided.
  • Figure 1 shows the basic arrangement with a by Focal points 1 and 2 of a hollow ellipsoid 3 guided Cut.
  • the hollow ellipsoid 3 is mirrored on the inside and with Provided openings 4 which are in relation to the inner surface of the Hollow ellipsoids 3 are small, for example max. 10% make up the inner surface.
  • the first focus 1 and its The immediate vicinity form the measuring field 5, where smoke particles irradiated at the same time by a radiation transmitter 6 and by a radiation receiver 7 can be detected in the focal point 2 can.
  • a radiation collector belongs to the radiation receiver 7, which is attached in the second focus 2. It the radiation receiver can also be used there instead be appropriate.
  • As a radiation collector one hemisphere lens each for the below the drawing plane or half-shell lying above the drawing plane of the hollow ellipsoid 3 serve.
  • the radiation receiver can consist of one or more photodiodes or an equivalent component.
  • the photodiodes can be arranged so that one is preferred Radiation from the backscatter and the other preferred receives the radiation from the forward scatter as in Figure 2 indicated, so the range of backward scattering through the reception angle 8 is designated. This makes it possible the scattered radiation received from the different scattering angles separated from each other in a single evaluation unit to evaluate and draw conclusions about the respective type of fire to draw that is typical of the respective particle size is. Other useful evaluations of angular ranges are possible.
  • the mirror formed by the hollow ellipsoid 3 can, as in Figure 1 shown, provided with a number of openings 4 into the measuring field 5 to penetrate.
  • the openings 4 are in terms of surface consumption small compared to the total surface, so that no significant loss in the proportion of that of the hollow ellipsoid 3 reflected radiation occurs.
  • All of the described embodiments can, as with optical Smoke detectors usual, provided with a labyrinth to prevent the entry of extraneous light into the hollow ellipsoid 3 to prevent.

Landscapes

  • 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)

Abstract

A smoke alarm on the scattered radiation principle. Having a measuring field (5), accessible to smoke particles, in a measuring chamber, at which field the radiation direction of a radiation transmitter (6) is aimed, and scattered radiation occurring in the measuring field (5) can be received by a radiation receiver (7); the measuring chamber includes a portion of the hollow ellipsoid (3) which is mirror-coated on the inside; the measuring field (5) is disposed at the first focal point (1) of the hollow ellipsoid; the radiation receiver (7) is disposed at the second focal point (2) of the hollow ellipsoid (3).

Description

Stand der TechnikState of the art

Die Erfindung geht von der Gattung aus, wie im unabhängigen Anspruch 1 angegeben.The invention is based on the genus, as in the independent Claim 1 specified.

Zur Brandfrüherkennung werden im allgemeinen Rauchmelder eingesetzt. Ein Verfahren, Rauchpartikel zu detektieren, besteht in der Messung von an Rauchpartikeln gestreuter Strahlung. Solche auf dem Streustrahlungsprinzip beruhende Rauchmelder benutzen üblicherweise das Verfahren der Vorwärtsstreuung, weil damit größere Signale am Strahlungsempfänger zu erzielen sind. Ein solcher Rauchmelder besteht aus einem Strahlungssender (normalerweise gepulst), einer Linse zur Bündelung der Strahlen und einem Strahlungsempfänger, zum Beispiel einer Photodiode, gegebenenfalls mit einer Linse zum Einfangen des Streukegels der gestreuten Strahlung. Strahlungsempfänger und Strahlungssender haben keine direkte Sichtverbindung, sondern sind durch entsprechende mechanische Maßnahmen optisch voneinander getrennt. Zwischen der Strahlungssenderichtung und der Empfangsrichtung liegt ein stumpfer Winkel, und der Streuwinkel an den zu detektierenden Rauchpartikeln ist ebenfalls stumpf. Smoke detectors are generally used for early fire detection used. One method is to detect smoke particles in the measurement of radiation scattered on smoke particles. Such smoke detectors based on the scattered radiation principle usually use the forward scattering method, because it means bigger signals at the radiation receiver can be achieved. Such a smoke detector consists of one Radiation transmitter (usually pulsed), a lens for Bundling the rays and a radiation receiver to Example of a photodiode, possibly with a lens to capture the scattering cone of the scattered radiation. Radiation receivers and radiation transmitters have no direct Line of sight, but are by appropriate mechanical Measures optically separated. Between the Radiation transmission direction and the reception direction lies obtuse angle, and the scattering angle at the detected Smoke particles are also dull.

Neben diesen vorwärtsstreuenden Rauchmeldern gibt es Ausführungen mit Rückwärtsstreuung. Hierbei sind Strahlungssender und Strahlungsempfänger nebeneinander angeordnet, der Streuwinkel, ist spitz (Patentschrift DE 38 31 654 C2).In addition to these forward-scattering smoke detectors, there are versions with backward scattering. Here are radiation transmitters and radiation receiver arranged side by side, the scattering angle, is pointed (patent DE 38 31 654 C2).

Nachteilig an den bekannten Verfahren ist jeweils, daß nur ein kleiner Anteil der gestreuten Strahlung auf den Strahlungsempfänger fällt, während die verbleibende Streustrahlung für die Messung verloren ist. Weiterhin wird nur jeweils einer der bevorzugten Meßeffekte, Vorwärts- bzw. Rückwärtsstreuung, ausgenutzt.A disadvantage of the known methods is that only a small proportion of the scattered radiation on the radiation receiver falls while the remaining scattered radiation for the measurement is lost. Furthermore, only each one of the preferred measurement effects, forward or backward scattering, exploited.

Aus dem Dokument WO-A-8909392 ist ein auf dem Streustrahlungsprinzip beruhender Verschmutzungsdetektor bekannt, wobei die Meßkammer aus einem innen verspiegelten Rohr mit elliptischem Querschnitt besteht und wobei der Strahlungssender entlang eines Brennpunkts ausstrahlt und der Strahlungsempfänger auf dem zweitem Brennpunkt am Ende des Rohres angebracht ist.From document WO-A-8909392 is based on the scattered radiation principle based pollution detector known, the measuring chamber from a inside mirrored tube with an elliptical cross section and where the Radiation transmitter emits along a focal point and the radiation receiver is attached to the second focal point at the end of the tube.

Vorteile der ErfindungAdvantages of the invention

Der Anmeldungsgegenstand mit den Merkmalen des Anspruches 1 hat folgenden Vorteil:The subject of the application with the features of claim 1 has the following advantage:

Die Erfindung ermöglicht es, fast die gesamte an den Rauchpartikeln gestreute Strahlung einem Strahlungsempfänger als Meßsignal zuzuführen. Dies beinhaltet sowohl die vorwärtsgestreute Strahlung, die rückwärtsgestreute Strahlung, als auch die gestreute Strahlung aller Zwischenbereiche. Damit wird die Messung insgesamt empfindlicher, da fast kein Verlust durch nicht eingefangene Strahlung entsteht. Der erfindungsgemäße Rauchmelder berücksichtigt weiterhin, die durch unterschiedliche Partikeldurchmesser begründeten Streuungseigenschaften.The invention allows almost all of the smoke particles Scattered radiation as a radiation receiver Feed measurement signal. This includes both the forward scattered Radiation, the backscattered radiation, as also the scattered radiation from all intermediate areas. In order to the measurement becomes more sensitive overall since there is almost no loss caused by radiation not captured. The invention Smoke detectors continue to take into account that caused by different particle diameters give rise to scattering properties.

Vorteilhafte Weiterbildungen sind in den abhängigen Ansprüchen angegeben, deren Merkmale auch, soweit sinnvoll, miteinander kombiniert werden können. Advantageous further developments are in the dependent claims specified, their characteristics also, as far as reasonable, with each other can be combined.

Als Strahlungssender kann eine lichtemittierende Diode, ein Halbleiterlaser oder eine Blitzlampe vorgesehen sein.A light-emitting diode can be used as the radiation transmitter Semiconductor laser or a flash lamp may be provided.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung gezeigt und in der nachfolgenden Beschreibung näher erläutert. Es ist dargestellt in

  • Figuren 1 bis 3: schematische Längsschnitte durch unterschiedliche Rauchmelder nach der Erfindung,
  • Figur 4: eine schematische, perspektivische Darstellung eines weiteren Ausführungsbeispiels nach der Erfindung.
    • Embodiments of the invention are shown in the drawing and explained in more detail in the following description. It is shown in
  • FIGS. 1 to 3: schematic longitudinal sections through different smoke detectors according to the invention,
  • Figure 4 is a schematic, perspective view of another embodiment according to the invention.

    • Im wesentlichen gleiche Teile in unterschiedlichen Figuren sind mit gleichen Bezugszeichen versehen.Essentially the same parts in different figures are provided with the same reference numerals.

    Beschreibung der AusführungsbeispieleDescription of the embodiments

    Figur 1 zeigt die prinzipielle Anordnung mit einem durch die Brennpunkte 1 und 2 eines Hohlellipsoids 3 geführten Schnitt. Das Hohlellipsoid 3 ist innen verspiegelt und mit Öffnungen 4 versehen, die im Verhältnis zur Innenfläche des Hohlellipsoids 3 klein sind, also beispielsweise max. 10% der Innenfläche ausmachen. Der erste Brennpunkt 1 und seine unmittelbare Umgebung bilden das Meßfeld 5, wo Rauchpartikel zugleich durch einen Strahlungssender 6 bestrahlt und durch einen Strahlungsempfänger 7 im Brennpunkt 2 detektiert werden können. Zu dem Strahlungsempfänger 7 gehört ein Strahlungssammler, der im zweiten Brennpunkt 2 angebracht ist. Es kann dort aber auch stattdessen der Strahlungsempfänger selbst angebracht sein. Als Strahlungssammler kann beispielsweise jeweils eine Halbkugellinse für die unterhalb der Zeichenebe bzw. oberhalb der Zeichenebene liegende Halbschale des Hohlellipsoids 3 dienen.Figure 1 shows the basic arrangement with a by Focal points 1 and 2 of a hollow ellipsoid 3 guided Cut. The hollow ellipsoid 3 is mirrored on the inside and with Provided openings 4 which are in relation to the inner surface of the Hollow ellipsoids 3 are small, for example max. 10% make up the inner surface. The first focus 1 and its The immediate vicinity form the measuring field 5, where smoke particles irradiated at the same time by a radiation transmitter 6 and by a radiation receiver 7 can be detected in the focal point 2 can. A radiation collector belongs to the radiation receiver 7, which is attached in the second focus 2. It the radiation receiver can also be used there instead be appropriate. For example, as a radiation collector one hemisphere lens each for the below the drawing plane or half-shell lying above the drawing plane of the hollow ellipsoid 3 serve.

    Der Strahlungsempfänger kann aus einer oder mehreren Photodioden oder einem äquivalenten Bauelement bestehen. Die Photodioden können so angeordnet sein, daß eine bevorzugt die Strahlung aus der Rückwärtsstreuung und die andere bevorzugt die Strahlung aus der Vorwärtsstreuung empfängt, wie in Figur 2 angedeutet, so der Bereich der Rückwärtsstreuung durch den Empfangswinkel 8 bezeichnet ist. Damit wird es möglich, die aus den verschiedenen Streuwinkeln empfangene Streustrahlung in einer einzigen Auswerteeinheit getrennt voneinander zu bewerten und Rückschlüsse auf die jeweilige Brandart zu ziehen, die typisch für die jeweilige Partikelgröße ist. Andere sinnvolle Bewertungen von Winkelbereichen sind möglich.The radiation receiver can consist of one or more photodiodes or an equivalent component. The photodiodes can be arranged so that one is preferred Radiation from the backscatter and the other preferred receives the radiation from the forward scatter as in Figure 2 indicated, so the range of backward scattering through the reception angle 8 is designated. This makes it possible the scattered radiation received from the different scattering angles separated from each other in a single evaluation unit to evaluate and draw conclusions about the respective type of fire to draw that is typical of the respective particle size is. Other useful evaluations of angular ranges are possible.

    Der durch das Hohlellipsoid 3 gebildete Spiegel kann, wie in Figur 1 gezeigt, mit einer Anzahl von Öffnungen 4 versehen sein, die es den Rauchpartikeln ermöglichen, in das Meßfeld 5 vorzudringen. Die Öffnungen 4 sind bezüglich des Oberflächenverbrauches klein gegenüber der Gesamtoberfläche, so daß kein nennenswerter Verlust an dem Anteil der vom Hohlellipsoid 3 reflektierten Strahlung auftritt.The mirror formed by the hollow ellipsoid 3 can, as in Figure 1 shown, provided with a number of openings 4 into the measuring field 5 to penetrate. The openings 4 are in terms of surface consumption small compared to the total surface, so that no significant loss in the proportion of that of the hollow ellipsoid 3 reflected radiation occurs.

    Wie Figur 3 zeigt, ist es auch möglich, eine Kuppe oder beide Kuppen an den Enden der Längsachse des Hohlellipsoids 3 anzuschneiden, um einen Raucheintritt durch eine Öffnung 4a zu ermöglichen. As Figure 3 shows, it is also possible to use a crest or both Peaks at the ends of the longitudinal axis of the hollow ellipsoid 3 cut to a smoke entry through an opening 4a to enable.

    Schließlich ist es gemäß Fig. 4 möglich, nur eine Teilschale 9 eines Hohlellipsoids zu verwenden, um freien Zugang der Rauchpartikel zum Messen zu ermöglichen. Diese Lösung zeichnet sich durch einen einfachen konstruktiven Aufbau aus. Hier ist ersichtlich, daß - wie auch in den anderen Figuren - in der Verlängerung der Strecke vom Strahlungssender 6 zum Meßfeld 5 eine Lichtfalle 10 angeordnet ist. Halteelemente 11 für den Strahlungsempfänger 7 sind schematisch dargestellt.Finally, it is possible according to FIG. 4, only a partial shell 9 of a hollow ellipsoid to allow free access to the To enable smoke particles to measure. This solution draws is characterized by a simple constructive structure. Here it can be seen that - as in the other figures - In the extension of the route from radiation transmitter 6 to Measuring field 5, a light trap 10 is arranged. retaining elements 11 for the radiation receiver 7 are shown schematically.

    Alle beschriebenen Ausführungsbeispiele können, wie bei optischen Rauchmeldern üblich, mit einem Labyrinth versehen sein, um den Eintritt von Fremdlicht in das Hohlellipsoid 3 zu verhindern.All of the described embodiments can, as with optical Smoke detectors usual, provided with a labyrinth to prevent the entry of extraneous light into the hollow ellipsoid 3 to prevent.

    Claims (8)

    1. Smoke detector based on the scattered radiation principle, having a measuring field (5) which is accessible to smoke particles, is arranged in a measuring chamber and at which the radiation direction of a radiation emitter (6) is aimed, it being possible for scattered radiation that occurs in the measuring field (5) to be received by a radiation receiver (7), characterized in that
      the measuring chamber comprises part of an internally reflective hollow ellipsoid (3),
      the measuring field (5) is arranged at the first focus (1) of the hollow ellipsoid (3),
      the radiation receiver (7) is arranged at the second focus (2) of the hollow ellipsoid (3).
    2. Smoke detector according to Claim 1, characterized in that the hollow ellipsoid (3) is virtually completely closed and is provided with openings (4) which are small but sufficiently large for smoke to enter.
    3. Smoke detector according to Claim 1, characterized in that an opening (4a) for smoke to enter the measuring chamber is in each case provided at the rounded sections around the longitudinal axis of the hollow ellipsoid (3).
    4. Smoke detector according to Claim 1, characterized in that only a partial shell (9) of the hollow ellipsoid is used as a reflector, and the remaining opening is used for smoke to enter the measuring chamber.
    5. Smoke detector according to one of the preceding claims, characterized in that in order to register the backscatter, a first radiation receiver (7a) is provided, and in order to register the forward scatter, a second radiation receiver (7b) is provided.
    6. Smoke detector according to one of the preceding claims, characterized in that the radiation emitter (6) provided is a light-emitting diode.
    7. Smoke detector according to one of Claims 1 to 5, characterized in that the radiation emitter (6) provided is a semiconductor laser.
    8. Smoke detector according to one of Claims 1 to 5, characterized in that the radiation emitter (6) provided is a flashlamp.
    EP98928058A 1997-09-23 1998-03-24 Smoke detector Expired - Lifetime EP1012805B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19741853A DE19741853A1 (en) 1997-09-23 1997-09-23 Hollow ellipse smoke alarm
    DE19741853 1997-09-23
    PCT/DE1998/000857 WO1999016033A1 (en) 1997-09-23 1998-03-24 Smoke detector

    Publications (2)

    Publication Number Publication Date
    EP1012805A1 EP1012805A1 (en) 2000-06-28
    EP1012805B1 true EP1012805B1 (en) 2002-06-19

    Family

    ID=7843273

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98928058A Expired - Lifetime EP1012805B1 (en) 1997-09-23 1998-03-24 Smoke detector

    Country Status (9)

    Country Link
    US (1) US6239710B1 (en)
    EP (1) EP1012805B1 (en)
    JP (1) JP2001517843A (en)
    CN (1) CN1111829C (en)
    AT (1) ATE219592T1 (en)
    AU (1) AU8007498A (en)
    DE (2) DE19741853A1 (en)
    ES (1) ES2178839T3 (en)
    WO (1) WO1999016033A1 (en)

    Families Citing this family (21)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19945856B4 (en) * 1999-09-24 2005-12-29 Robert Bosch Gmbh Sprinkler device with a valve for extinguishing liquid
    US6876305B2 (en) * 1999-12-08 2005-04-05 Gentex Corporation Compact particle sensor
    DE10012705B4 (en) * 2000-03-08 2006-09-14 Torsten Dipl.-Ing. Clauß Method and device for early detection and combat of fire in the interior and exterior, in particular residential, of houses and buildings
    DE10060044C2 (en) * 2000-12-02 2003-01-09 Rubitec Gesellschaft Fuer Innovation & Technologie Ruhr Univ Bochum Mbh Scattered light detector
    US7119899B2 (en) * 2003-07-23 2006-10-10 Lighthouse Worldwide Solutions, Inc Particle sensor system
    DE102004001699A1 (en) * 2004-01-13 2005-08-04 Robert Bosch Gmbh fire alarm
    CN100394456C (en) * 2004-04-06 2008-06-11 诺瓦尔有限公司 Fire identification method and fire alarm implementing the method
    US7502110B2 (en) * 2004-07-21 2009-03-10 Lighthouse Worldwide Solutions, Inc Design for particle sensor system
    US7847700B2 (en) * 2007-07-03 2010-12-07 Conforti Fred J System and method for an optical particle detector
    EP2336993B1 (en) * 2008-10-09 2020-06-24 Hochiki Corporation Smoke detector
    GB2484930B (en) * 2010-10-26 2017-04-26 Uh Ventures Ltd An improved low cost apparatus and method for the detection of a fluid-borne particle
    KR20120071453A (en) * 2010-12-23 2012-07-03 삼성전자주식회사 Apparatus for detection of microorganism
    DE102011108389A1 (en) 2011-07-22 2013-01-24 PPP "KB Pribor" Ltd. smoke detector
    DE102011108390B4 (en) 2011-07-22 2019-07-11 PPP "KB Pribor" Ltd. Method of making an open type smoke detector
    FR2995640B1 (en) * 2012-09-19 2015-03-20 Efs Sa DEVICE FOR MEASURING A QUANTITY OF FLUID INJECTED BY AN INJECTOR
    JP6438319B2 (en) * 2015-02-18 2018-12-12 アズビル株式会社 Particle detector
    JP6688966B2 (en) 2015-07-27 2020-04-28 パナソニックＩｐマネジメント株式会社 Particle detection sensor
    EP3128493A1 (en) * 2015-08-06 2017-02-08 Siemens Schweiz AG Scattered light smoke detector with optical measurement chamber in detector housing and with a mirror surface on the inside of a detector hood as part of the detector housing
    WO2017104533A1 (en) 2015-12-14 2017-06-22 三菱電機株式会社 Minute object detection device
    KR102380173B1 (en) * 2017-04-14 2022-03-29 엘지이노텍 주식회사 Apparatus for sensing particle
    CN112213245B (en) * 2020-11-26 2021-05-28 江西嘉德物联传感技术有限责任公司 Smog response alarm device based on thing networking

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2357888A1 (en) * 1976-04-01 1978-02-03 Cerberus Ag SMOKE DETECTOR
    CH660244A5 (en) * 1983-01-11 1987-03-31 Cerberus Ag PHOTOELECTRIC SMOKE DETECTOR AND THEIR USE.
    JPS617447A (en) * 1983-12-24 1986-01-14 イノテツク、アクチエンゲゼルシヤフト Optical guide condensing method and device thereof
    EP0175940B1 (en) * 1984-08-23 1990-12-05 Nohmi Bosai Kogyo Co., Ltd. Photoelectric smoke detector
    WO1989009392A1 (en) * 1988-03-30 1989-10-05 Martin Terence Cole Fluid pollution monitor
    CH684556A5 (en) * 1992-09-14 1994-10-14 Cerberus Ag Optical Smoke Detector.

    Also Published As

    Publication number Publication date
    ATE219592T1 (en) 2002-07-15
    WO1999016033A1 (en) 1999-04-01
    DE59804533D1 (en) 2002-07-25
    AU8007498A (en) 1999-04-12
    JP2001517843A (en) 2001-10-09
    CN1111829C (en) 2003-06-18
    EP1012805A1 (en) 2000-06-28
    US6239710B1 (en) 2001-05-29
    DE19741853A1 (en) 1999-03-25
    ES2178839T3 (en) 2003-01-01
    CN1261972A (en) 2000-08-02

    Similar Documents

    Publication Publication Date Title
    EP1012805B1 (en) Smoke detector
    DE60218074T2 (en) flow cytometer
    DE2101358C2 (en) Photo analysis device
    EP0761585B1 (en) Yarn sensor
    DE2754139C3 (en) Smoke detector
    DE102006013290A1 (en) Device for optical distance measurement and method for operating such a device
    DE2827704C3 (en) Optical device for determining the light exit angle
    DE2818674C3 (en) Device for measuring properties of optical fibers
    EP3521810A1 (en) Analyser for the determination of fine dust
    DE60126076T2 (en) GAS CELL
    DE202005018197U1 (en) Laser distance measurement device
    DE102014016515A1 (en) Optical gas sensor
    EP1160719A2 (en) Sensor for authentication of bookmarks on documents
    DE69334181T2 (en) IMPROVED PARTICLE SENSOR AND DEVICE FOR DETECTING A PARTICLE
    EP1695109B1 (en) Device for measuring the distance to far-off objects and close objects
    DE202006012038U1 (en) Optical distance measuring device
    DE69421649T2 (en) Optical testing device for the filling of cigarettes
    DD142648A5 (en) DEVICE FOR TESTING THE VOLUME OF CIGARETTE ENDS
    DE2827705C3 (en) Device for the detection of defects in web material
    DE3917571C2 (en)
    DE68902877T2 (en) METHOD AND DEVICE FOR MEASURING THE VISIBILITY THROUGH A MEDIA VARIABLE DENSITY.
    DE19816359A1 (en) Optical structural change detector for surface of moving part, especially adhesive layer
    WO2000020849A1 (en) Device for detecting foreign substances in a thread
    DE1957494A1 (en) Photoelectric scanning device
    DE2206126A1 (en) Device for detecting defects in a surface

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    17P Request for examination filed

    Effective date: 20000425

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE CH DE DK ES FI FR GB IT LI LU NL PT SE

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    17Q First examination report despatched

    Effective date: 20010905

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE CH DE DK ES FI FR GB IT LI LU NL PT SE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20020619

    Ref country code: FI

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20020619

    REF Corresponds to:

    Ref document number: 219592

    Country of ref document: AT

    Date of ref document: 20020715

    Kind code of ref document: T

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: NV

    Representative=s name: SCINTILLA AG, DIREKTION

    Ref country code: CH

    Ref legal event code: EP

    REF Corresponds to:

    Ref document number: 59804533

    Country of ref document: DE

    Date of ref document: 20020725

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20020827

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20020919

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20020919

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20020923

    ET Fr: translation filed
    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2178839

    Country of ref document: ES

    Kind code of ref document: T3

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: AT

    Payment date: 20030321

    Year of fee payment: 6

    Ref country code: BE

    Payment date: 20030321

    Year of fee payment: 6

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: LU

    Payment date: 20030325

    Year of fee payment: 6

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20030320

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: LU

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20040324

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20040324

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20040331

    BERE Be: lapsed

    Owner name: ROBERT *BOSCH G.M.B.H.

    Effective date: 20040331

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20130329

    Year of fee payment: 16

    Ref country code: GB

    Payment date: 20130318

    Year of fee payment: 16

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20140324

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20141128

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20140331

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20140324

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: CH

    Payment date: 20170327

    Year of fee payment: 20

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20170529

    Year of fee payment: 20

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: ES

    Payment date: 20170323

    Year of fee payment: 20

    Ref country code: IT

    Payment date: 20170323

    Year of fee payment: 20

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R071

    Ref document number: 59804533

    Country of ref document: DE

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: PL

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20200804

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

    Effective date: 20180325