EP2624229B1 - Mesure du flux d'air permettant de contrôler l'état de bon fonctionnement d'un détecteur de type chambre à fumée. - Google Patents

Mesure du flux d'air permettant de contrôler l'état de bon fonctionnement d'un détecteur de type chambre à fumée. Download PDF

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Publication number
EP2624229B1
EP2624229B1 EP12197665.8A EP12197665A EP2624229B1 EP 2624229 B1 EP2624229 B1 EP 2624229B1 EP 12197665 A EP12197665 A EP 12197665A EP 2624229 B1 EP2624229 B1 EP 2624229B1
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EP
European Patent Office
Prior art keywords
fire detector
flow
flow sensor
automatic fire
measuring chamber
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EP12197665.8A
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German (de)
English (en)
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EP2624229A1 (fr
Inventor
Muhammed Ali Narin
Ulrich Oppelt
Bernd Siber
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP2624229A1 publication Critical patent/EP2624229A1/fr
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    • 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
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/043—Monitoring of the detection circuits of fire detection circuits
    • 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 automatic fire detector for the detection of fires, with a housing, which comprises a measuring chamber for the detection of smoke particles, with a sensor for detecting a measured variable for evaluating the operational capability of the automatic fire detector and with an evaluation device for evaluating the operational capability of the automatic fire detector Basis of the measured variable.
  • Automatic fire alarms are used to detect fires and to trigger an alarm in the event of a detected fire. For the detection of the fire certain parameters, such as temperature or density of smoke particles, are measured. The measured data acquired by sensors are transmitted to a control device. The control device determines based on the transmitted measurement data an alarm triggering. Automatic fire detection systems are used in rooms or areas where protection of persons and property is sensible or regulated by law.
  • the DE 10 2009 046 556 A1 describes a fire alarm device with a verification device for checking the operational capability of the fire alarm device.
  • the fire alarm device comprises a sensor system for detecting at least one fire-specific environmental variable and a test device.
  • the checking device has a gas storage tank with a test gas, which is to simulate a fire by ejecting and checks in this way the operability of the fire alarm device.
  • a smoke detector which comprises a smoke sensor and an aspiration unit.
  • the aspiration unit causes ambient air of the smoke detector to flow into a sensor region of a sensor.
  • the publication EP 227 0762 A2 which represents the closest prior art, describes a smoke alarm device with a housing which has smoke passage openings and comprises a smoke detector and an alarm signaling device.
  • the interior of the housing is divided by a partition into two chambers. It is provided a sensor element with which the strength of a secondary air flow is measured, which depends on the degree of throttling of the smoke passage openings .
  • the invention thus relates to a fire detector for the detection of fires, in particular an automatic fire detector for the detection of fires.
  • the arrangement of the fire detector takes place, for example, in closed rooms, but also semi-closed spaces, such as warehouses or areas such as a train station are conceivable.
  • the fire detector has a housing which comprises a measuring chamber for the detection of smoke particles.
  • the measuring chamber may be, for example, an optical measuring chamber.
  • Optical measuring chambers comprise a diode which generates a light beam. The light beam of the diode is scattered in the case of smoke particles in the ambient air in the measuring chamber, wherein the scattered light strikes a sensor and this detects an increased particle concentration due to the scattered light.
  • the optical measuring chamber forms a scattered light sensor.
  • the measuring chamber has an inlet opening, so that a flow of ambient air can reach the measuring chamber. Furthermore, the measuring chamber comprises an outlet opening, from which the flow of ambient air from the inlet opening can emerge again via a flow area.
  • the flow rate of the ambient air which comprises particles and in particular smoke particles, makes it possible to detect the particle concentration in the ambient air in the measuring chamber.
  • the fire detector comprises a sensor system which serves for detecting a measured variable for evaluating the operational capability of the fire detector, and an evaluation device which evaluates, in particular evaluates, the operational capability of the fire detector on the basis of the measured variable.
  • the operational capability of the fire detector can be impaired, for example, by a closure of the measuring chamber, in particular the inlet opening of the measuring chamber, for example by dust. Also, objects that are positioned in the vicinity of the fire detector, affect a smoke inflow into the measuring chamber of the fire alarm.
  • the sensor system is coupled to the evaluation device in order to transmit the measured variables detected by the sensor system.
  • the evaluation device can carry out an evaluation of the operational capability of the fire detector.
  • the evaluation As a result of the evaluation of a lack of operational capability of the fire detector, the evaluation generates a fault message, which is transmitted for example to a fire alarm panel. Also, an optical signaling, such as a glowing LED, or an acoustic signaling can be arranged on the fire detector to give an indication of the lack of operational capability of the fire alarm.
  • the fault message can be transmitted for example via an electrical connection or via a wireless radio.
  • the sensor system comprises at least one flow sensor for detecting a flow of the ambient air as the measured variable for evaluating the operational capability of the fire detector.
  • An advantage of the invention is therefore the detection of the operational capability of the fire detector by measuring the flow state of the ambient air through the flow sensor.
  • fire alarms are to be positioned so that no objects are present in their environment which ensure a proper operational capability, ie. prevent the smoke from entering the measuring chamber of the fire detector.
  • a further advantage of the invention is consequently the reduction of the cost and time required for the visual check as to whether the arrangement of the fire detectors complies with the application standard requirements. Maintenance inspections for checking the closure of the measuring chamber can also be reduced.
  • the flow sensor is in particular designed to measure either the flow velocity directly from the flow or based on other parameters such.
  • the flow sensor may be designed as a flow sensor, in particular as an air mass meter or as an ultrasonic sensor. Also other parameters, such as temperature, which suggest the flow, are possible.
  • the advantage of flow sensors is that even the smallest flows can be detected reliably.
  • the flow sensor is designed as a micromechanical sensor, so that it can be integrated into the automatic fire detector due to the comparatively small size of the fire alarm.
  • the flow sensor is designed as a hot wire flow sensor whose operating principle is based on that cools a hot wire due to the flow.
  • the degree of cooling is a function of the flow velocity and air temperature.
  • the flow sensor is designed as an impeller anemometer, in which an impeller due to the Flow rotates, wherein the rotational speed is dependent on the flow velocity.
  • the flow sensor is designed as an internal flow sensor, which detects the internal chamber flow of ambient air in the measuring chamber as a measured variable. Since the measuring chamber has at least or exactly one inlet opening and at least or exactly one outlet opening of the measuring chamber, a constant flow of the ambient air, i. an internal chamber flow, guaranteed. If the internal flow sensor detects a flow state which indicates an insufficient flow of ambient air in the measuring chamber, the evaluation device can therefore conclude that the fire detector is unusable.
  • the internal flow sensor is particularly preferred to arrange the internal flow sensor at the inlet opening or at the outlet opening of the measuring chamber, since elements, for example for the detection of smoke particles, are already arranged in the flow area of the measuring chamber. However, it is also conceivable to arrange the internal flow sensor in the flow area of the measuring chamber.
  • the flow sensor is designed as an external flow sensor, which is arranged on the housing outside the measuring chamber or in the vicinity of the measuring chamber and / or detects the flow of ambient air outside the measuring chamber as a measured variable.
  • the external flow sensor is arranged so close to the measuring chamber in particular so that the flow measurement allows a conclusion on the internal chamber flow of the measuring chamber.
  • the housing additionally has a flow chamber with an inlet and outlet opening in which the external flow sensor is arranged in order to be able to carry out the flow measurement.
  • the evaluation device is configured to derive from the measured variable of the external flow sensor a disturbance of the air supply to the measuring chamber, to the inlet opening of the measuring chamber, to the outlet opening of the measuring chamber or evaluate in the fire detector and close to a concealment of the fire alarm.
  • the flow sensor comprises the internal and the external flow sensor.
  • the internal and external flow sensors perform flow measurements parallel to each other and transmit them to the evaluation device.
  • both a closure of the measuring chamber, as well as a covering of the fire detector can be concluded.
  • the evaluation device can have at least one parameter for evaluating the operational capability of the automatic fire detector for the evaluation device.
  • the evaluation device comprises a learning device.
  • the learning device is designed to detect flows from the internal and / or the external flow sensor over a time interval as flow data and to form at least one statistical parameter from the acquired flow data.
  • the statistical parameter here represents the at least one parameter for evaluating the operational capability of the automatic fire detector for the evaluation device.
  • the statistical parameter is formed from an average value, a frequency distribution, a maximum, a minimum or from a standard deviation of the flow data. The detection of the statistical characteristic can be done for example during the initial installation of fire detectors.
  • the evaluation device has an evaluation mode for the internal and / or external flow sensor, wherein the evaluation device is designed, in the measurement mode, the measured variable of the flow of the internal and / or the external flow sensor with a predefinable limit value or with a statistic based on the statistical characteristic Limit as the at least one parameter to compare. In case of violation of the limit, the flow rate is so low that it is concluded that the automatic fire detector is not suitable for use.
  • the state in which the flow is lower than the limit value indicates a closure of the measuring chamber.
  • the evaluation device has an evaluation mode for the internal and external flow sensor, wherein the evaluation device is designed to compare the measured variable of the flow of the internal flow sensor with the measured variable of the flow of the external flow sensor in the evaluation mode. Based on the comparison of the two measured variables, the evaluation device concludes that the automatic fire detector is unusable and generates a fault message. The comparison is based, for example, on a quotient of the two measured variables. For example, the measured variable of the external flow sensor can be divided with the measured variable of the internal flow sensor or vice versa.
  • An advantage of the combination is the common evaluation of the flow outside and inside the measuring chamber. This makes it possible to distinguish whether the flow rate through a closure of the measuring chamber due to the measured quantities is disturbed by the internal flow sensor or the flow rate is blocked by obscuring objects in the vicinity of the fire detector due to the measured quantities from the external flow sensor.
  • the evaluation device registers a change in the ratio of the two measured variables of the flow sensors on the basis of the comparison, for example based on the quotient of the two measured variables, a fault in the air supply to the measuring chamber of the fire detector can be evaluated.
  • the flow velocity is used as a measure of the flow of the internal and / or external flow sensor as an indicator of a fire.
  • the flow in or around the fire detector is affected not only by obstacles but also by temperature changes or heat sources in the vicinity of the fire detector.
  • a fire ensteht by the energetic material conversion at the fire source one Temperature increase, which is significant for an increase in convection depending on the fire.
  • An increase in the flow velocity in or at the fire detector can therefore be interpreted as a fire parameter if it exceeds a threshold value.
  • a fire situation can be inferred if the time course of the increase in the flow velocity corresponds to the development speed of typical fires.
  • the use of the measured variable of the flow sensor thus serves not only the fault detection, but in the case of a fire also the hedge against a false alarm or the more reliable or earlier decision for a fire.
  • the automatic fire detector is preferably arranged as a wall fire detector on a wall of a room or area. Particularly preferably, the automatic fire detector is arranged as a ceiling fire detector on a ceiling of a room or area to ensure a timely detection of a fire. It is also conceivable that the automatic fire detector is flush with a wall or a ceiling.
  • the measured variables are averaged over time or, in particular, filtered via a low-pass filter. This can prove to be advantageous if the flow changes significantly for short periods of time due to the environment, for example by opening a window to ventilate the environment.
  • FIG. 1 shows an automatic fire detector 1, which is designed for the detection of fires, in a two-dimensional representation as an embodiment of the invention.
  • the automatic fire detector 1 is based on the scattered light principle for the detection of particles of the ambient air in order to detect a fire.
  • the automatic fire detector 1 comprises a housing 10 which is circular in plan view of the housing 10 and on the back has a flat housing wall 17, wherein the fire detector 1 is formed as a ceiling housing.
  • the housing 10 comprises an optical measuring chamber 11.
  • the optical measuring chamber 11 comprises a diode which generates a light beam. The light beam of the diode is scattered in the case of smoke particles in the measuring chamber, wherein the scattered light hits a sensor and this detects an increased particle concentration due to the scattered light.
  • the optical measuring chamber 11 has an inlet opening 12, an outlet opening 13 and a flow area 14, the flow area 14 being arranged between the inlet opening 12 and the outlet opening 13.
  • the ambient air flows from the inlet opening 12 via the flow area 14 to the outlet opening 13 of the measuring chamber 11 or in the opposite direction.
  • an internal flow sensor 2 is arranged, which performs a measurement of the flow of ambient air in the measuring chamber 11 as a measured variable S 1 . If the internal flow sensor 2 detects a flow state which indicates an insufficient flow of the ambient air in the measuring chamber 11, it can therefore be concluded that the fire detector 1 is unsuitable for use.
  • the housing 10 has an external flow sensor 3, which is arranged outside the measuring chamber 11 in an edge region of the housing 10 and which is designed to carry out a measurement of the ambient air and to output it as a measured variable S 2 .
  • the housing 10 has an inlet opening 15 and an outlet opening 16, between which the flow sensor 3 is arranged.
  • the internal and / or external flow sensor may be configured as a hot wire flow sensor or as an impeller anemometer.
  • FIG. 2 shows a block diagram of the automatic fire detector 1 in the FIG. 1 ,
  • the automatic fire detector 1 has the internal and the external flow sensor 2, 3 as well as an evaluation device 20, wherein the flow sensors 2, 3 for the transmission of the measured variables S 1 and S 2 are coupled to the evaluation device 20.
  • the evaluation device 20 evaluates the operational capability of the fire detector 1 on the basis of the detected measured variables S 1 , S 2 and can be arranged, for example, inside or outside the housing 10. As a result of the evaluation of the lack of operational capability of the fire detector 1, the evaluation device 20 generates a fault message and outputs it to a fire alarm control panel 25.
  • the evaluation device 20 comprises a learning device 21, which is designed to provide one or more limit values S soll for evaluating the operational capability of the automatic fire detector 1. Will the Limit value S should be violated by the measured variables S 1 , S 2 or a characteristic derived therefrom, ie, exceeded or fallen short of, it is concluded that the automatic fire detector is not suitable for use.
  • the learning device 21 is configured either to provide one or more programmed limit values S soll or to form the limit value S soll from one or more statistical parameters.
  • the statistical characteristic or parameters can be determined, for example, during an initial installation of the fire detector 1 in a trial operation.
  • measurements of the measured quantities S 1 and S 2 are carried out as flow data in a time learning interval of, for example, 24 hours or even several days or weeks and fed into the learning device 21 so that the at least one statistical parameter is formed based on the acquired flow data can.
  • the statistical characteristic may be designed, for example, as an average, a minimum, a maximum or a standard deviation of the flow data. Also, a frequency distribution, i. the description of the frequency of specific events of the measured variables as a statistical parameter is conceivable.
  • the evaluation device 20 comprises according to the embodiment of FIG. 2 three measurement modes 22, 23, 24 for evaluating the operational capability of the automatic fire detector 1.
  • FIG. 3 1 shows a diagram for illustrating the first measurement mode 22 for evaluating the operational capability of the automatic fire detector 1.
  • the time in the x-axis and the flow velocity in the y-axis are plotted as a measured value and shows a signal curve 30 of the internal and / or or external flow sensor 2, 3 from the transmitted measured quantities S 1 , S 2 from the flow sensors 2, 3.
  • the evaluation means 20 is adapted to the transmitted measured values S 1, S 2 of the internal and / or external flow sensor 2.3 with a predetermined limit by the learning means 21 is to compare S.
  • the signal curve 30 is above the threshold value S soll , so that there is a flow rate, which can be inferred to an operational capability of the automatic fire detector 1.
  • the waveform 30 the limit value S to below that suggests a shutter of the measuring chamber 11 or to an occlusion of the fire detector. 1 Since it may happen that the flow is only temporarily affected, the interval is a delay interval. If the delay interval t 1 to t 2 expired, the evaluation device 20 generates a fault message and outputs it to a fire alarm panel 25. The delay interval t 1 to t 2 is set via the learning device 21.
  • FIG. 4 11 shows a diagram of the second measurement mode 23 for evaluating the operational capability of the automatic fire detector 1.
  • a closure of the measurement chamber 11 is determined on the basis of the frequency of flow peaks as events that are transmitted by the internal flow sensor 2.
  • Flow peaks are measured flows which are significantly above the average measured flow velocity and thus exceed the threshold S soll .
  • flow peaks can be caused by opening a window in a room.
  • the learning device 21 predefines the frequency of the flow peaks in a measuring interval T 1 , which is either programmed in or detected by the described test operation.
  • this state indicates a closure of the measuring chamber 11 and thus a lack of operational capability of the automatic fire detector 1.
  • FIG. 5 shows a third measurement mode 24 for evaluating the operational capability of the automatic fire detector 1 with a diagram according to FIG. 3 or 4 .
  • the measured quantities S 1 and S 2 of the internal and external flow sensors 2, 3 are evaluated by the evaluation device 20 compared. Based on the comparison, it can be concluded that the automatic fire detector 1 can be used.
  • the flow sensors 2 , 3 transmit an approximately identical signal course 30 of the measured quantities S 1 , S 2 .
  • the flow sensors 2 , 3 transmit an approximately identical signal course 30 of the measured quantities S 1 , S 2 .
  • the ratio of the two measured variables S 1 , S 2 changes .
  • the internal flow sensor 2 transmits a smaller measured variable S 1 as of the time t 1 than the external flow sensor 3, so that a closure of the measuring chamber 11 can be assumed.
  • the evaluation device 20 could conclude a closure of the measuring chamber 11 and generate a fault message.
  • a delay interval t 1 to t 2 is provided, since only a temporary impairment of the measuring chamber 11 is conceivable. If the internal flow sensor 2 continues to transmit a smaller measured variable than the external flow sensor 3 after the time t 2 , it is possible to conclude that the flow flow in the measuring chamber 11 is blocked.
  • the measured variable S 2 is divided by the measured variable S 1 .
  • This signal profile 31 is shown in the diagram for the measurement mode 24.
  • the measured variable S 1 for the measured variable S 2 decreases from the time t 1 , so that the quotient increases increasingly. If the quotient reaches the limit S soll , an error message is generated by the evaluation device 20.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)

Claims (11)

  1. Détecteur automatique d'incendie (1) destiné à détecter des incendies,
    comportant un boîtier (10), dans lequel le boîtier (10) comprend une chambre de mesure (11) destinée à détecter des particules de fumée,
    comportant un système de capteur destiné à détecter une grandeur de mesure afin d'estimer l'aptitude au fonctionnement du détecteur automatique d'incendie (1), comportant un dispositif d'évaluation (20) destiné à évaluer l'aptitude au fonctionnement du détecteur automatique d'incendie (1) sur la base de la grandeur de mesure,
    dans lequel le système de capteur comprend au moins un capteur d'écoulement destiné à détecter un écoulement en tant que grandeur de mesure afin d'estimer l'aptitude au fonctionnement du détecteur automatique d'incendie (1),
    caractérisé en ce que le capteur d'écoulement est réalisé sous la forme d'un capteur d'écoulement externe (3) qui est disposé sur le boîtier (10) à l'extérieur de la chambre de mesure (11) ou dans l'environnement de la chambre de mesure (11) pour mesurer en tant que grandeur de mesure l'écoulement de l'air ambiant à l'extérieur de la chambre de mesure.
  2. Détecteur automatique d'incendie (1) selon la revendication 1, caractérisé en ce que ledit au moins un capteur d'écoulement comprend un capteur
    d'écoulement interne (2) en tant qu'autre capteur d'écoulement, qui détecte en tant que grandeur de mesure l'écoulement interne à la chambre de la chambre de mesure (11).
  3. Détecteur automatique d'incendie (1) selon la revendication 2, caractérisé en ce que le capteur d'écoulement interne (2) est disposé sur une ouverture d'entrée de la chambre de mesure (12), sur une ouverture de sortie de la chambre de mesure (13) et/ou dans la chambre de mesure (14) pour détecter l'écoulement interne à la chambre de mesure.
  4. Détecteur automatique d'incendie (1) selon l'une quelconque des revendications 2 ou 3 précédentes,
    caractérisé en ce que le dispositif d'évaluation (20) est conçu pour évaluer, à partir de l'écoulement détecté à l'intérieur de la chambre du capteur d'écoulement interne (2), une perturbation de la chambre de mesure (11), à savoir un bouchon de la chambre de mesure et des objets qui sont positionnés dans l'environnement du détecteur d'incendie.
  5. Détecteur automatique d'incendie (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le dispositif dévaluation (20) est conçu pour évaluer, à partir de l'écoulement détecté du capteur d'écoulement externe (3), une perturbation de l'amenée d'air vers la chambre de mesure (11) du détecteur d'incendie (1).
  6. Détecteur automatique d'incendie (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le dispositif d'évaluation (20) comprend un dispositif d'apprentissage (21), dans lequel le dispositif d'apprentissage (21) est conçu pour détecter des écoulements du capteur d'écoulement interne (2) et/ou du capteur d'écoulement externe (3) au cours d'un intervalle de temps en tant que données d'écoulement et pour établir à partir des données d'écoulement détectées au moins une grandeur caractéristique statistique, dans lequel la grandeur caractéristique statistique représente un paramètre permettant d'estimer l'aptitude au fonctionnement du détecteur automatique d'incendie pour le dispositif d'évaluation (20).
  7. Détecteur automatique d'incendie (1) selon la revendication 6, caractérisé en ce que le dispositif d'évaluation (20) présente un mode d'évaluation pour le capteur d'écoulement interne et/ou externe (2, 3), dans lequel le dispositif d'évaluation (20) est conçu pour comparer la grandeur de mesure de l'écoulement du capteur d'écoulement interne et/ou externe (2, 3) à une valeur limite pouvant être prédéterminée ou à une valeur limite basée sur la grandeur caractéristique statistique et pour en conclure qu'il se produit une absence d'aptitude au fonctionnement du détecteur automatique d'incendie (1) lorsque la valeur limite n'est pas respectée.
  8. Détecteur automatique d'incendie (1) selon l'une quelconque des revendications 2 à 7 précédentes,
    caractérisé en ce que le dispositif d'évaluation (20) présente un mode d'évaluation destiné aux capteurs d'écoulement interne et externe (2, 3), dans lequel le dispositif d'évaluation (20) est conçu pour comparer les grandeurs de mesure de l'écoulement du capteur d'écoulement interne (2) à la grandeur de mesure de l'écoulement du capteur d'écoulement externe (3) et pour conclure sur la base de la comparaison qu'il se produit une absence d'aptitude au fonctionnement du détecteur automatique d'incendie.
  9. Détecteur automatique d'incendie (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'un ou ledit dispositif d'évaluation (20) est conçu pour comparer le débit d'écoulement en tant que grandeur de mesure de l'écoulement du capteur d'écoulement interne et/ou externe (2, 3) à une valeur de seuil pouvant être prédéterminée et pour en conclure qu'il se produit un incendie dans l'environnement lorsque la valeur de seuil n'est pas respectée.
  10. Détecteur automatique d'incendie (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'un ou ledit dispositif d'évaluation (20) est conçu pour comparer la vitesse de croissance du débit d'écoulement en tant que grandeur de mesure de l'écoulement du capteur d'écoulement interne et/ou externe (2, 3) à une valeur de seuil pouvant être prédéterminée et pour en conclure qu'il se produit un incendie dans l'environnement lorsque la valeur de seuil n'est pas respectée.
  11. Détecteur automatique d'incendie (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le détecteur automatique d'incendie (1) est réalisé sous la forme d'un détecteur d'incendie mural ou d'un détecteur d'incendie de plafond destiné à être fixé à une paroi ou à un plafond d'une pièce.
EP12197665.8A 2012-02-06 2012-12-18 Mesure du flux d'air permettant de contrôler l'état de bon fonctionnement d'un détecteur de type chambre à fumée. Active EP2624229B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012201703A DE102012201703A1 (de) 2012-02-06 2012-02-06 Automatischer Brandmelder zur Detektion von Bränden

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EP2624229A1 EP2624229A1 (fr) 2013-08-07
EP2624229B1 true EP2624229B1 (fr) 2017-02-22

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US11609144B2 (en) 2020-05-08 2023-03-21 Carrier Corporation Detection of leakage in an aspirating fire detection system
WO2024079510A1 (fr) 2022-10-13 2024-04-18 Bosch Security Systems - Sistemas De Segurança, S.A Procédé et détecteur de fumée agencés pour identifier lorsqu'ils sont obstrués dans un environnement ambiant

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DE102015004458B4 (de) 2014-06-26 2016-05-12 Elmos Semiconductor Aktiengesellschaft Vorrichtung und Verfahren für einen klassifizierenden, rauchkammerlosen Luftzustandssensor zur Prognostizierung eines folgenden Betriebszustands
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