EP2028631A2 - Détecteur de fumée doté d'une surveillance de l'encrassement - Google Patents

Détecteur de fumée doté d'une surveillance de l'encrassement Download PDF

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Publication number
EP2028631A2
EP2028631A2 EP08014521A EP08014521A EP2028631A2 EP 2028631 A2 EP2028631 A2 EP 2028631A2 EP 08014521 A EP08014521 A EP 08014521A EP 08014521 A EP08014521 A EP 08014521A EP 2028631 A2 EP2028631 A2 EP 2028631A2
Authority
EP
European Patent Office
Prior art keywords
light
detector
measuring
measuring chamber
housing
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
EP08014521A
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German (de)
English (en)
Other versions
EP2028631A3 (fr
EP2028631B1 (fr
Inventor
Manfred Mitreiter
David Baum
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.)
Hekatron Vertriebs GmbH
Original Assignee
Hekatron Vertriebs 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 Hekatron Vertriebs GmbH filed Critical Hekatron Vertriebs GmbH
Priority to EP11008071A priority Critical patent/EP2405412A1/fr
Priority to EP11008070.2A priority patent/EP2407949B1/fr
Publication of EP2028631A2 publication Critical patent/EP2028631A2/fr
Publication of EP2028631A3 publication Critical patent/EP2028631A3/fr
Application granted granted Critical
Publication of EP2028631B1 publication Critical patent/EP2028631B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
    • G08B29/145—Checking intermittently signalling or alarm systems checking the detection circuits of fire detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources

Definitions

  • the present invention relates to a smoke detector for detecting fires, comprising a device with which soiling of smoke inlet openings are detected, and a method for detecting the contamination of smoke inlet openings.
  • Fire and smoke alarms warn of dangers such as fire and smoke and must therefore be ready for use at all times.
  • the detectors must be regularly checked and serviced. A large part of the necessary functional tests, such as the testing of the sensors, the detectors can perform themselves in the context of conventional self-tests. The results of these self-tests can then be documented in the detector or in a central office. If an error is detected in such a self-test, this is indicated with display means as a fault of the detector. Depending on the configuration of the existing installation, this fault can either be displayed only at the detector, at a control panel or at other terminals. Besides, it is conceivable that service personnel is informed about the disturbance directly via a communication medium.
  • DIN 14676 prescribes a visual inspection for smoke detectors.
  • soiling of the smoke inlet openings should be detected. Since, in particular, when the regular checks are to be carried out by service personnel, high costs are incurred due to the necessary inspections of properties, solutions are sought by which the detection of soiling of smoke inlets can be carried out automatically by the detector itself.
  • a scattered light smoke detector which detects the pollution of an insect screen.
  • the insect screen protects the measuring chamber of a smoke detector against the ingress of insects, which could otherwise trigger false alarms, but lets smoke pass, which can then be detected in the measuring chamber.
  • an auxiliary light transmitter is mounted inside the housing. The light from the auxiliary light transmitter penetrates the insect screen and then enters the measuring chamber of the smoke detector. There it can be measured by the receiver, who otherwise only detects the light scattered by smoke. By comparing the current light intensity with the original one, the level of contamination of the detector can be used.
  • this solution has the following disadvantages: Since the auxiliary light source is located inside the housing, only a statement about the degree of contamination of the insect screen, but not about the pollution of the smoke inlet openings in the housing of the detector can be taken. In addition, the light of the auxiliary light source, after it has passed the insect screen, still penetrate through a labyrinth, which has just the task of light from outside the Keep the measuring chamber from entering the measuring chamber. The labyrinth thus also prevents the auxiliary light from entering the measuring chamber and thus reduces the measuring effect.
  • Another device for detecting contamination of the insect screen of a scattered light fire detector is in the JP 02227800 shown.
  • an auxiliary light source outside the insect screen attached.
  • this is so appropriate that the light emitted by it is directed directly in the direction of the measuring light receiver in the measuring chamber.
  • a labyrinth element that would lie between the auxiliary light transmitter and the measurement receiver is omitted and replaced by an external labyrinth element mounted outside the insect screen behind the auxiliary light transmitter.
  • the pollution of the insect screen can be monitored only at a single point, which is also protected by the external labyrinth element against the rest of the grid from contamination. Therefore, the contamination measurement at this point does not allow in most cases a reliable statement about the pollution of the rest of the grid.
  • a scattered light smoke detector with a switchable optical aperture between the scattered light measuring receiver and the measuring volume known.
  • the aperture serves to switch between two different measurement volumes in two different spatial areas.
  • the invention is therefore an object of the invention to provide a smoke detector of the type mentioned above, which eliminates the disadvantages of the prior art mentioned or at least improved and moreover offers further advantages.
  • a scattered light fire detector comprises a housing and a scattered light measuring volume in a measuring chamber with a labyrinth, in which at least one measuring light transmitter and a scattered light measuring receiver are mounted, the receiver receiving light of the measuring light transmitter scattered in the scattered light measuring volume of smoke or other aerosols.
  • the detector housing and / or the measuring chamber are at least partially made of a material whose optical properties are switchable. Since it is regarded as the main effect of the invention to deliberately let light from outside the detector into the measuring chamber, the switchable material is not between the measuring light transmitter or the scattered light measuring receiver and the measuring volume to fulfill there the function of a switchable diaphragm.
  • the transparency properties of this material may preferably be changed from transparent or translucent (translucent) to opaque (opaque). This makes it possible, on the one hand, to allow light from outside the detector to be deliberately let into the measuring chamber and detected there. On the other hand, extraneous light coming from outside the detector can be purposefully prevented from penetrating into the measuring chamber, so that a scattered light smoke measurement can be carried out in the usual way undisturbed.
  • the optically switchable material used is electrochromatic or photoelectrochromatic material.
  • Electrochromatic material changes its optical properties with respect to color, transparency, translucency or opacity when an electrical voltage is applied to the material. It is sufficient if the voltage is present only during the state change and is applied again for the renewed change with reversed polarity.
  • a voltage must be applied at least during the entire duration of a state.
  • charge carriers which are necessary for the state change and which are supplied by the applied voltage in the case of electrochromatic material are supplied by an internal solar cell.
  • Electrochromic material can be produced by coating a transparent support material, such as glass, with a substance which changes its optical properties, in particular the color and transparency, after the application or reversal of a voltage.
  • a transparent support material such as glass
  • Substances having such properties include, for example, tungsten oxide, molybdenum oxide, titanium dioxide, nickel dioxide, iridium dioxide, rhodium dioxide, polyanilines, polypyrrole and Prussian blue. These substances are preferably embedded between two transparent electrodes, via which the necessary voltage can be applied.
  • At least one window is provided in the housing and / or the measuring chamber, in particular the measuring chamber housing, which in its optical properties with respect to color, transparency, translucency or opacity is switchable.
  • At least one window is mounted in the measuring chamber and the housing. These two windows are arranged against each other so that in the transparent state of both windows, light from outside the detector falls on a receiver inside the measuring chamber.
  • at least one of the windows is designed as a switchable window in the mentioned optical properties.
  • At least one switchable window is mounted in the measuring chamber such that light passes through the smoke inlet openings of the housing onto a receiver in the measuring chamber in the light-permeable state of this window.
  • this can be designed so that at least one element of the optical labyrinth of the measuring chamber is designed as a switchable window.
  • auxiliary light source which radiates into the detector, is mounted in the outer area of the detector.
  • this auxiliary light source may also be modulated to distinguish between the light of the auxiliary light source and the foreign light components.
  • auxiliary light source may be guided as an annular light guide to the housing. This allows the light-emitting component can be inexpensively mounted inside the detector in SMD technology on a circuit board and yet light from outside the detector can be radiated through all the smoke inlet openings in the detector into it.
  • a scattered light fire detector comprises a unit for detecting soiling of the smoke inlet openings, comprising at least one auxiliary light source which is mounted outside of the detector and a light guide arranged annularly inside the detector, which collects light incident from the outside and to a receiver in the Interior of the detector directs.
  • auxiliary light source is guided as an annular light guide to the housing. It is also within the meaning of the invention, when the light guide itself has electrochromatic properties.
  • the invention relates to a method for operating a detector described above.
  • all switchable windows in the housing and / or in the measuring chamber are switched to opaque. This ensures that no light from outside the detector can penetrate into the measuring chamber.
  • the detector now corresponds to a standard scattered light smoke detector with a measuring chamber.
  • a scattered light measurement is performed, in which the light emitter in the measuring chamber is turned on and the light arriving at the receiver is converted into electrical signals, which are evaluated in a known manner to detect smoke.
  • at least one window in the housing and / or the measuring chamber is switched to a light-permeable state and the light incident in the measuring chamber is detected. After one or more measurements of a quantity of light which has penetrated into the measuring chamber, the previously translucently switched windows are again rendered opaque in order to again carry out a scattered light smoke measurement.
  • One of the selectable measuring tasks is the detection of fire and / or flames.
  • the light incident into the measuring chamber can be evaluated, for example, with regard to intensity and flicker frequency.
  • Another measuring task is the determination of the brightness state outside the detector, for which purpose the intensity of the light incident in the measuring chamber is detected and evaluated.
  • the brightness measurement is used for a contamination measurement described below.
  • Another measuring task is to watch the light entering the measuring chamber for information or commands contained therein which have been transmitted by a transmitter, for example a remote control.
  • the information contained is evaluated or executed commands for the respective detector.
  • the receiver present in the measuring chamber can also serve as a communication receiver.
  • a preferred measuring task is to be seen in that the amount of light incident in the measuring chamber for the detection of contamination of the smoke inlet openings and / or the insect screen of the detector is evaluated. This preferably takes place in that a first and / or second window in the measuring chamber and / or in the housing are switched translucent, a first light measurement is performed, the first and / or second window are switched opaque again, a third window is switched to translucent and a second light measurement is performed. The degree of contamination is then assessed on the basis of the measured values of the first and second light measurements. For the assessment, an attenuation value is determined from the measured values of the first and second light measurements.
  • the degree of soiling is determined based on the attenuation value and otherwise based on the measured value of the second measurement. Contamination is detected when the attenuation value or the second measured value exceeds or falls below a predetermined reference value.
  • a light source is activated, which is outside the detector or outside of the detector is mounted. This makes it possible to send a defined light intensity into the detector, which considerably simplifies the comparison with the reference value. It is particularly advantageous if at least one auxiliary light source is arranged annularly around the smoke inlet openings.
  • the light which has passed through the smoke inlet openings and / or the insect screen is collected by a light guide which is arranged annularly on the inside of the insect screen and directed onto a contamination measuring receiver. From the first and the second light measurement, the attenuation value that is used for the detection of contamination is then determined. Only if no usable brightness value is available, the use of the auxiliary light source is necessary.
  • the detectors described above are suitable for a method of coloring a detector.
  • the detectors must first be externally coated with electrochromatic or photoelectrochromatic material.
  • switches are opened or closed and / or a voltage is applied to the electrochromatic material.
  • the electrochromatic material colors and the detector assumes a different color. This can be useful, for example, in rooms that are darkened for photo lectures and in which reflexes on bright detectors then have a disturbing effect. It is also conceivable that an existing alarm or a malfunction of the detector are displayed via the color change.
  • the Fig. 1 shows in greatly simplified form a scattered light smoke detector (1) with a housing (2) and a measuring chamber (3).
  • a measuring light transmitter (4) which emits light into the measuring chamber (3)
  • a scattered light measuring receiver (5) which receives light emitted by the measuring light transmitter (4) and smoke in a scattered light measuring volume (19) or other aerosols was scattered.
  • Above the scattered light measuring receiver (5) is located in the measuring chamber (3) or the measuring chamber housing (3) a first window (6)
  • Above the first window (6) in the housing (2) of the detector (1) has a second window (7 ) appropriate.
  • a lens (8) is inserted here.
  • the lens (8) can also be part of the first and / or second window (6/7).
  • At least one of the windows (6/7) is made of electrochromic material, such as transparent electrodes and tungsten oxide coated glass or transparent plastic.
  • Line voltage can be applied to the first and / or second window (6/7). As a result, they become transparent or at least translucent and light can penetrate through both windows (6/7) into the measuring chamber (3) and be detected by the scattered light measuring receiver (5).
  • the signals supplied by the scattered light measuring receiver (5) are then, as in the scattered light measurement, evaluated in a known manner by an evaluation circuit, not shown. Depending on the measuring task, the signals are analyzed for intensity, flicker frequency or modulated information in the evaluation circuit.
  • the scattered light measuring receiver (5) is used as a flame sensor, it makes sense to install the lens (8) as a fisheye lens directly into the second window (7) so that the largest possible area can be monitored. It is within the meaning of the invention that the lens (8) is made of electrochromatic material.
  • the electrochromic material By re-applying a voltage of opposite polarity to the first and / or the second window (6/7), the electrochromic material again becomes opaque. As a result, the measuring chamber (3) again protected against the ingress of extraneous light and a scattered light smoke measurement can be carried out in a known manner.
  • the in Fig. 1 detector shown additionally has an auxiliary light source (9a) which is mounted outside the housing. Light emitted from this auxiliary light source (9a) penetrates through the smoke inlet openings (10) into the housing (2) of the detector (1) and through an insect screen (11). So that the light emitted by the auxiliary light source (9a) light, for the detection of contamination of the smoke inlet openings and the insect screen (11), can be detected by the scattered light measuring receiver (5), at least one labyrinth element (12) is provided, which is made of electrochromatic material.
  • the labyrinth element By applying a voltage to the labyrinth element it becomes transparent and the light emitted by the auxiliary light source (9a) can pass through the smoke inlet openings (10) in the housing (2), the insect screen (11) and the labyrinth element (12) onto the scattered light measuring receiver (5). fall and be detected there. In an evaluation circuit, not shown, the degree of attenuation of this light is used to assess the pollution of smoke inlet openings (10) and insect screens (11).
  • an auxiliary light source (9b) can also be mounted directly on the printed circuit board (14) within the housing (2).
  • a light guide (13) is provided, which leads the light emitted by the auxiliary light source (9b) to the outside.
  • the light guide (13) is designed so that the light is emitted through the smoke inlet openings (10) into the interior of the detector (1).
  • a detector (1) with another device for detecting contamination of the smoke inlet openings (10) and the insect screen (11) shown.
  • This embodiment has, as well as in Fig. 1 shown, via an auxiliary light source (9b) and a light guide (13) which receives the light emitted from the auxiliary light source light and radiates outside of the detector housing (2) in the direction of the smoke inlet openings.
  • the light guide (13) is as in Fig. 5 to see is outside the housing (2) annularly guided around the smoke inlet openings (10).
  • the attenuation of the light emitted by the auxiliary light transmitter (9b) and measured by the pollution measuring receiver (15) light as a measure of the degree of contamination of the smoke inlet openings (10) and the insect screen (11) is evaluated.
  • the Fig. 3 schematically shows a measuring chamber (3) of a scattered light smoke detector (1) with a measuring light transmitter (4), a scattered light measuring receiver (5), a scattered light measuring volume (19) and a labyrinth (17), which consists of several approximately L-shaped opaque labyrinth elements (18) and a labyrinth element (12), which is switchable in its optical properties and is preferably made of electrochromatic material.
  • an auxiliary light source (9a) is mounted, which is used for the detection of contamination of the insect screen (11) and the smoke inlet openings (10) not shown here.
  • An in Fig. 4 shown detector (1) differs from that in Fig. 3 shown in that in addition a part of the housing (2) is shown, on which a plurality of auxiliary light sources (9a) are mounted along the circumference.
  • Each of these auxiliary light sources (9a) is assigned a labyrinth element (12) which can be switched in its optical properties.
  • the scattered light measuring receiver (5) is here in the middle of the measuring chamber (3) and can receive light from each of the auxiliary light sources (9a) equally.
  • Fig. 5 are opposite to the representation in Fig. 4 the outside auxiliary light sources (9a) are replaced by at least one auxiliary light source (9b) located inside the detector housing (2), the light of which is led out through a first light guide (13) and from the latter through the smoke inlet openings (10) into the interior of the detector (1 ) is blasted.
  • the first light guide (13) surrounds the smoke inlet openings (10) annularly, whereby the contamination state of the smoke inlet openings (10) and the insect screen (11) over the full circumference of the measuring chamber (3) can be measured.
  • a second light guide (16) is arranged in a ring, which collects light which penetrates into the detector (1) and leads to a contamination measuring receiver (15).
  • the labyrinth (17) contains a plurality of switchable labyrinth elements (12) which can also be switched individually via separate voltage lines, not shown. As a result, individual smoke inlet openings (10) or segments can be specifically examined for contamination.
  • the detector (1) behaves like an ordinary scattered light smoke detector with a measuring chamber and a smoke measurement is carried out in a known manner.
  • both windows (6, 7) and the lens (8) are transparent and light from an observation area outside the detector (1) can penetrate through the measuring chamber housing (3) into the measuring chamber (3) and fall onto the scattered light measuring receiver (5) ,
  • the scattered light measuring receiver (5) converts the light incident on it into electrical signals which are examined by an evaluation circuit. To detect flames, the signal is examined for intensity and flicker frequency, as in known flame detectors. In addition, the intensity of the incident light can also be used to measure the brightness of the interstitial space.
  • the brightness information can now either be used inside the detector to deliver, for example, disturbance messages only from a certain brightness, because it can be expected that in dark rooms either no one is present and the fault message can not be perceived anyway, or people want to sleep, which should not be disturbed unnecessarily. As soon as a certain minimum brightness is detected, the fault messages, for example for a weak battery of a smoke detector, are emitted again.
  • the brightness information could also be passed through an interface to a building management system, which automatically closes shutters, for example, when too much sunlight falls into the room.
  • the signals can be examined for contained information such as commands for the detector itself.
  • commands can be sent to the detector via a remote control, which can perform a self-test on the detector (1) or mute a pending alarm.
  • the light attenuation caused by the smoke inlet openings (10) and the insect screen (11) can be determined directly from the brightness value and the "transvalue" Dark value for correcting both measured values is subtracted from these. Since a clogged insect screen (11) or even masked smoke inlet openings (10) have a significantly higher attenuation than clean smoke inlet openings (10) and insect screens (11), the value of the light attenuation serves as a measure of the pollution of the smoke inlet openings (10) and the insect screen ( 11).
  • the currently determined damping is compared with a stored initial value. In this case, if the difference between the two values exceeds a predetermined level, a fault message is issued and a fouling flag is set.
  • an auxiliary light source (9a / 9b) is switched on and a third measured value stored as "Hilfersranswert". Since the radiation intensity of the auxiliary light source (9a / 9b) can be assumed to be approximately constant, the difference between "auxiliary transmittance" and "transvalue” can serve as a measure for the contamination of the smoke inlet openings (10) and the insect screen (11). If in the detector (1) a circuit for extraneous light suppression is provided, as they are known from the light barrier technology or extinction fire detectors ago or in the dark in the surveillance area can already be used as a measure of pollution, the corrected "Hilfstranswert. In these cases, only the "auxiliary" value is compared with a predefined threshold and a fault is detected if it is exceeded.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
EP08014521A 2007-08-21 2008-08-14 Détecteur de fumée doté d'une surveillance de l'encrassement Not-in-force EP2028631B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11008071A EP2405412A1 (fr) 2007-08-21 2008-08-14 Procédé pour colorer un capteur.
EP11008070.2A EP2407949B1 (fr) 2007-08-21 2008-08-14 Source lumineuse auxiliaire en forme annulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007039401A DE102007039401B4 (de) 2007-08-21 2007-08-21 Rauchmelder mit Verschmutzungsüberwachung

Publications (3)

Publication Number Publication Date
EP2028631A2 true EP2028631A2 (fr) 2009-02-25
EP2028631A3 EP2028631A3 (fr) 2009-11-18
EP2028631B1 EP2028631B1 (fr) 2011-10-26

Family

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Family Applications (3)

Application Number Title Priority Date Filing Date
EP08014521A Not-in-force EP2028631B1 (fr) 2007-08-21 2008-08-14 Détecteur de fumée doté d'une surveillance de l'encrassement
EP11008070.2A Active EP2407949B1 (fr) 2007-08-21 2008-08-14 Source lumineuse auxiliaire en forme annulaire
EP11008071A Withdrawn EP2405412A1 (fr) 2007-08-21 2008-08-14 Procédé pour colorer un capteur.

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP11008070.2A Active EP2407949B1 (fr) 2007-08-21 2008-08-14 Source lumineuse auxiliaire en forme annulaire
EP11008071A Withdrawn EP2405412A1 (fr) 2007-08-21 2008-08-14 Procédé pour colorer un capteur.

Country Status (3)

Country Link
EP (3) EP2028631B1 (fr)
AT (1) ATE531018T1 (fr)
DE (1) DE102007039401B4 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2166521A1 (fr) 2008-09-19 2010-03-24 Nittan Company, Limited Détecteur de flamme
EP2330577A1 (fr) * 2009-12-04 2011-06-08 Atral-Secal GmbH Détecteur de fumée doté d'une surveillance du recouvrement infrarouge
EP2555176A1 (fr) * 2011-08-04 2013-02-06 Atral-Secal GmbH Dispositif de détection d'incendies
EP2747047A1 (fr) * 2012-12-19 2014-06-25 Schneider Electric Industries SAS Détecteur de fumée avec indicateur du niveau de charge de la batterie
WO2015162529A1 (fr) * 2014-04-21 2015-10-29 Tyco Fire & Security Gmbh Dispositif et appareil pour auto-esssai de système déflecteur de détecteur de fumée
EP2423895B1 (fr) 2010-08-26 2017-03-08 Siemens Schweiz AG Alarme incendie à lumière diffusée dotée de moyens de suppression d'une alerte acoustique en cas de faible tension d'alimentation
EP3113133A3 (fr) * 2015-06-29 2017-05-17 Atral-Secal GmbH Detecteur de fumee dote d'un dispositif combine de detection de particule et de recouvrement de l'orifice d'entree de fumee
CN110675591A (zh) * 2019-09-14 2020-01-10 杭州拓深科技有限公司 一种抗干扰光电烟雾检测方法及检测模块

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Publication number Priority date Publication date Assignee Title
DE102011088850B3 (de) * 2011-12-16 2013-04-04 Robert Bosch Gmbh Vorrichtung zur Detektion von Rauch und Verfahren zum Prüfen der Funktionsfähigkeit einer Vorrichtung zur Detektion von Rauch
DE102015221795A1 (de) 2015-11-06 2017-05-11 Robert Bosch Gmbh Gerät mit Batterieanschluss
DE102016121369B4 (de) * 2016-11-08 2018-12-13 Tq-Systems Gmbh Rauchmesszelle
DE102017217280A1 (de) * 2017-09-28 2019-03-28 Robert Bosch Gmbh Messeinrichtung zur Partikelmessung
DE102020111144B4 (de) 2020-04-23 2022-02-10 Agilent Technologies, Inc. - A Delaware Corporation - Analysegerät mit Gehäuseabschnitt mit zumindest abschnittsweise steuerbaren optischen Transmissionseigenschaften
DE102020206453A1 (de) * 2020-05-25 2021-11-25 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Verschmutzungserkennung eines Brandmelders, Brandmelder, Computerprogramm und maschinenlesbares Speichermedium
DE102021210728A1 (de) 2021-09-27 2023-03-30 Robert Bosch Gesellschaft mit beschränkter Haftung Partikelmessvorrichtung

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EP0503167B1 (fr) 1991-03-12 1995-06-14 Matsushita Electric Works, Ltd. Détecteur de fumée et procédé pour tester un tel détecteur
WO2000072282A1 (fr) 1999-05-19 2000-11-30 Rokonet Electronics Ltd. Detecteur de fumee autoreglable
DE10110231A1 (de) 2001-03-02 2002-09-26 Bosch Gmbh Robert Optische Blende

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
EP2166521A1 (fr) 2008-09-19 2010-03-24 Nittan Company, Limited Détecteur de flamme
US8201973B2 (en) 2008-09-19 2012-06-19 Lixil Nittan Company, Limited Flame detector
EP2330577A1 (fr) * 2009-12-04 2011-06-08 Atral-Secal GmbH Détecteur de fumée doté d'une surveillance du recouvrement infrarouge
EP2423895B1 (fr) 2010-08-26 2017-03-08 Siemens Schweiz AG Alarme incendie à lumière diffusée dotée de moyens de suppression d'une alerte acoustique en cas de faible tension d'alimentation
EP2555176A1 (fr) * 2011-08-04 2013-02-06 Atral-Secal GmbH Dispositif de détection d'incendies
EP2747047A1 (fr) * 2012-12-19 2014-06-25 Schneider Electric Industries SAS Détecteur de fumée avec indicateur du niveau de charge de la batterie
WO2015162529A1 (fr) * 2014-04-21 2015-10-29 Tyco Fire & Security Gmbh Dispositif et appareil pour auto-esssai de système déflecteur de détecteur de fumée
US9679468B2 (en) 2014-04-21 2017-06-13 Tyco Fire & Security Gmbh Device and apparatus for self-testing smoke detector baffle system
AU2015249510B2 (en) * 2014-04-21 2019-08-29 Tyco Fire & Security Gmbh Device and apparatus for self-testing smoke detector baffle system
EP3113133A3 (fr) * 2015-06-29 2017-05-17 Atral-Secal GmbH Detecteur de fumee dote d'un dispositif combine de detection de particule et de recouvrement de l'orifice d'entree de fumee
CN110675591A (zh) * 2019-09-14 2020-01-10 杭州拓深科技有限公司 一种抗干扰光电烟雾检测方法及检测模块

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EP2405412A1 (fr) 2012-01-11
EP2407949B1 (fr) 2013-05-22
DE102007039401A1 (de) 2009-02-26
EP2407949A1 (fr) 2012-01-18
EP2028631A3 (fr) 2009-11-18
EP2028631B1 (fr) 2011-10-26
ATE531018T1 (de) 2011-11-15
DE102007039401B4 (de) 2012-07-12

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