EP2595132A2 - Dispositif d'alarme - Google Patents

Dispositif d'alarme Download PDF

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Publication number
EP2595132A2
EP2595132A2 EP12007641.9A EP12007641A EP2595132A2 EP 2595132 A2 EP2595132 A2 EP 2595132A2 EP 12007641 A EP12007641 A EP 12007641A EP 2595132 A2 EP2595132 A2 EP 2595132A2
Authority
EP
European Patent Office
Prior art keywords
sensor
gas
detector
hazard
hazard detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12007641.9A
Other languages
German (de)
English (en)
Other versions
EP2595132A3 (fr
Inventor
Gerold Stauss
Martin Weidner
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
Publication of EP2595132A2 publication Critical patent/EP2595132A2/fr
Publication of EP2595132A3 publication Critical patent/EP2595132A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
    • 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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/183—Single detectors using dual technologies

Definitions

  • the invention relates to a hazard detector for monitoring the environment with respect to a hazard, with at least one sensor element having a gas sensor which measures a concentration of particles of a gas from the ambient air of the hazard alarm, wherein the sensor element in the interior of an at least partially for the Particles permeable element shell is arranged, through which the particles pass before their detection by the at least one gas sensor, wherein the sensor element is provided with at least one further sensor for common arrangement with the gas sensor within the element shell and the at least one further sensor one of the particle concentration the gas recorded different measure.
  • the invention relates to an operating method for such a detector.
  • Such danger detectors are known in principle and are used, for example, as fire detectors, the monitored hazard quantity then being the presence of a fire, and consequently the gas sensor detecting the concentration of particles of a gas occurring during the fire as a fire parameter.
  • the sensor element is involved in its protection provided an element shell, which must first be penetrated by the gas particles, so the molecules of the gas, in order to penetrate to the gas sensor and detected there, which is why the element shell is provided at least partially permeable.
  • the detector should switch to an error mode in which a notification to a control center or the like takes place.
  • a gas detector which also contains a pressure sensor in addition to a gas sensor.
  • a pressure difference arises between the pressure within the gas sensor and the surroundings of the gas detector.
  • the pressure sensor detects this differential pressure and detects a blockage of the filter.
  • a danger detector of the type mentioned in the introduction in which the danger detector assesses the permeability of the permeable region of the element casing on the basis of the fluctuation range of the measured variable different from the particle concentration of the gas.
  • the measured values, or more precisely the fluctuation range, of at least one further sensor of the sensor element which does not measure the fire characteristic of the first sensor, but another variable, such as an environmental variable are used Fluctuation can win the desired permeability information.
  • An advantageous embodiment of the danger detector can be provided, for example, with a further sensor, which is a temperature and / or moisture sensor, for determining environmental variables that can be used in the evaluation of the permeability of the permeable region of the element casing.
  • a fluctuation range of the humidity z. B. determines of at least 0.08 g / m 3 within a day, a sufficient permeability of the element shell is given. If the selected value is undershot, then a blockage of the element envelope is assumed. The hazard detector, which detects such a blockage, will issue a fault message. The error message, in turn, causes the hazard alarm to be checked more closely. If a blockage is confirmed during this check, the hazard alarm can be cleaned or replaced. On the other hand, if the blockage is not confirmed, the comparison value is too large, or the timeframe considered too short, and should be adjusted accordingly. It is conceivable, however, that the humidity sensor itself is defective, but this can also be determined in the context of the more detailed examination.
  • An expedient supplement to this embodiment of the danger detector can be provided with a sufficiently large fluctuation range with a further gas sensor for obtaining a further fire parameter or a present gas, which is arranged together with the first gas sensor on the sensor element. Furthermore, it is also conceivable that the second gas sensor has the same measured variable as the first one.
  • the permeable region of the element envelope is formed by a filter material, a grid or a membrane in a development of the danger detector.
  • this permeable region of the element casing can be provided with a Teflon membrane.
  • Another development of the danger detector according to the invention is provided in an area outside the element envelope with at least one further sensor, in particular a plurality of further sensors whose values can also be used in the permeability assessment.
  • a development of the danger detector can advantageously be provided with a heating device which can be arranged inside or outside the element casing, so that different Temperature and coupled with these humidity conditions in the environment of the sensors generated detectable by them and thus can be evaluated.
  • a heater may be disposed on the side of a membrane facing away from the at least one gas sensor and / or the further sensors, the operation of which dries the air on this membrane side, whereby the moisture measured by the associated sensor decreases when the membrane is permeable.
  • the temperature sensor on the other side of the membrane should show a rising signal next to it. It is also conceivable to accommodate the heater in the sensor housing. Heating would then dry the air in the sensor housing. If the membrane is still permeable enough, the moisture value should be restored after heating for a determinable time as before heating.
  • the entirety of components of the hazard detector may be provided for their protection in an embodiment with a detector housing which houses the components of the detector, wherein components sensor elements, sensors and their supports, heaters and sinkers and others for the operation the danger detector may be necessary or useful parts.
  • the detector components if appropriate accommodated in the detector housing, can be arranged on a circuit board and electrically connected, so that they can be easily connected to other devices, positioned or integrated into higher-level detector concepts.
  • control and / or evaluation device provided in an embodiment of the danger detector, it can be operated easily and the values detected by the sensors can be easily further processed, so that reliable information about the functionality and reliability of the detector can be obtained.
  • An advantageous embodiment of the hazard detector according to the invention can in this case have a time measuring device or it can be associated with one which is set up to detect at least one specific date and / or a specific time at a measuring time and / or the detection of at least one time interval to at least one previous measuring time.
  • the control and / or evaluation device may preferably classify the respective measurement time seasonal, weekly and / or daily time by means of the acquired data and times and adapting comparison values of at least one of the sensors to seasonal, weekly and / or daily time fluctuations make.
  • the time measuring device can thereby establish a calendar function in the danger detector, in order to adapt the comparison values to the seasonal fluctuations (see also the example Berlin above). This makes the detection of blockages of the membrane even more accurate.
  • the evaluation device uses an algorithm that is at least self-learning so that this optionally the flowing into the evaluation fluctuations in the measured variable over a predetermined period of time, at the beginning of the life, if the element shell certainly still permeable is determined by the detector itself, this optionally stored on a storage means and evaluated at predetermined times.
  • the algorithm may particularly preferably compare the values which have been determined themselves and optionally subjected to an evaluation procedure to stored or retrievable non-related comparison values.
  • the daily or even weekly fluctuations over a whole year in a table can be entered. For larger periods, eg. Months, mean values can also be set as comparison values.
  • the comparison value falls below the reference value in the relevant comparison period, for example, by half, the elemental envelope is regarded as clogged, whereby criteria or fixed, conservative, experience-based values can be specified for this purpose.
  • the relevant detector of a detector arrangement can be assigned to one or a plurality of further detectors in a predeterminable area of its environment, and exchange information with at least one of the further detectors.
  • the evaluation device may preferably take into account the measured values of one, a plurality or all other danger detectors of the given environment.
  • the consideration of the measured values of other danger detectors in the environment may be advantageous in that when the other hazard alarms have larger fluctuation ranges, the probability of constipation increases, while in a short-term similar decrease in the range of fluctuation in all detectors, a lower probability of clogging is present.
  • the object is also achieved by a method for operating a hazard detector, which monitors its environment with regard to at least one hazard by means of at least one sensor element, which sensor element has at least one gas sensor with which a concentration of particles of a gas from the ambient air of the danger detector measured becomes.
  • the sensor element is arranged in the interior of an element shell which is permeable to the particles at least in regions, through which the particles pass through the at least one gas sensor prior to their detection.
  • at least one of the particle concentration of the gas different measured variable is detected by at least one further sensor, with which the sensor element is provided with the at least one gas sensor for common arrangement within the element shell.
  • the method is characterized in that the permeability of the permeable region of the element envelope is assessed by the danger detector on the basis of the fluctuation of the different from the particle concentration of the gas measured, so thus the desired permeability information is obtained from the fluctuation of a measured variable, just not the fire characteristic is.
  • the element casing 7 has a permeable region 8, which in the illustration of Fig.1 is arranged on the upwardly turned edge of the element shell 7.
  • the sensors 3, 4, 5, 6 arranged in the element envelope 7 of the sensor element 2 are, on the one hand, gas sensors 3, 4 which detect two different flue gases, and sensors 5, 6 which detect two environmental variables, namely a humidity sensor 5 and a sensor Temperature sensor 6.
  • the sensor element 2 is accommodated with the sensors 3, 4, 5, 6 and a heater 9 arranged in front of the permeable region 8 in the detector housing 10, which in turn is arranged on a circuit board 11.
  • the extreme case is formed by the flat line 16 extending parallel to the time abscissa, which represents a vanishing moisture fluctuation, which means that no exchange takes place over the permeable region 8 of the element casing 7.
  • the hazard detector 1 must pass on at least one error message which allows to recognize that the gas sensors 3, 4 can no longer measure reasonable values and therefore the danger parameter can no longer be reliably determined.
  • the Figure 4 shows the time course of a test situation with respect to the permeability of the permeable region 8 of the element envelope 7 by means of a heater 9 disposed within the element envelope 7, in which at the time 17, the heater 9 is turned on and turned off at time 18, resulting in the curve of Curve 19 leads.
  • the temperature signal 20 increases, while the humidity signal 21 indicates a decreasing humidity.
  • both curves slowly return to their original value, indicating that there is an exchange with the environment through the permeable region 8 of the element shell 7, thus ensuring permeability.
  • the above invention thus relates to a hazard detector 1 for monitoring its environment with regard to a hazard, with at least one sensor element 2, which has at least one gas sensor 3, 4, which measures a concentration of particles of a gas in the ambient air of the hazard detector 1, wherein the sensor element 2 is arranged in the interior of an at least partially permeable to the particles element shell 7, through which the particles pass before their detection by the at least one gas sensor 3, 4.
  • the sensor element 2 is with at least one further sensor 5 , 6 for common arrangement with the at least one gas sensor 3, 4 provided within the element shell 7, the at least one further sensor 5, 6 detects a different from the particle concentration of the gas measured variable, based on their range of variation of the hazard detector 1, the permeability of the permeable

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Emergency Alarm Devices (AREA)
EP12007641.9A 2011-11-17 2012-11-12 Dispositif d'alarme Withdrawn EP2595132A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011118770A DE102011118770B3 (de) 2011-11-17 2011-11-17 Gefahrenmelder

Publications (2)

Publication Number Publication Date
EP2595132A2 true EP2595132A2 (fr) 2013-05-22
EP2595132A3 EP2595132A3 (fr) 2016-09-14

Family

ID=47594179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12007641.9A Withdrawn EP2595132A3 (fr) 2011-11-17 2012-11-12 Dispositif d'alarme

Country Status (2)

Country Link
EP (1) EP2595132A3 (fr)
DE (1) DE102011118770B3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115753527A (zh) * 2022-11-19 2023-03-07 北京思维实创科技有限公司 一种机电设备火灾预警方法、系统、终端设备及存储介质
EP4246483A1 (fr) 2022-03-18 2023-09-20 Siemens Schweiz AG Détecteurs d'incendie à thermistances non chauffées, en particulier ntcs, destinés à la détection des fluctuations thermiques dans la zone des ouvertures d'entrée, ainsi que procédé correspondant

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123451A1 (de) * 1981-06-12 1982-12-30 Siemens AG, 1000 Berlin und 8000 München Verfahren und anordnung zur stoerungserkennung in gefahren-, insbesondere brandmeldeanlagen
JPH09184799A (ja) * 1995-12-28 1997-07-15 Secom Co Ltd フィルター付き検出器
CA2291203A1 (fr) * 1998-12-04 2000-06-04 George A. Schoenfelder Detecteur aspirateur dote d'un capteur d'ecoulement
TWI235965B (en) * 2001-04-24 2005-07-11 Matsushita Electric Works Ltd Fire detector unit
CN102436712B (zh) * 2008-03-31 2014-10-15 能美防灾株式会社 热烟复合型火灾探测器
DE102009031099A1 (de) * 2009-06-29 2010-12-30 Ista International Gmbh Rauchwarnmelder und Verfahren zur Überprüfung der Verschmutzung der Rauchdurchtrittsöffnungen
EP2549453B1 (fr) * 2010-01-21 2016-11-09 Hochiki Corporation Détecteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4246483A1 (fr) 2022-03-18 2023-09-20 Siemens Schweiz AG Détecteurs d'incendie à thermistances non chauffées, en particulier ntcs, destinés à la détection des fluctuations thermiques dans la zone des ouvertures d'entrée, ainsi que procédé correspondant
CN115753527A (zh) * 2022-11-19 2023-03-07 北京思维实创科技有限公司 一种机电设备火灾预警方法、系统、终端设备及存储介质

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Publication number Publication date
DE102011118770B3 (de) 2013-04-04
EP2595132A3 (fr) 2016-09-14

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