EP2330577A1 - Détecteur de fumée doté d'une surveillance du recouvrement infrarouge - Google Patents

Détecteur de fumée doté d'une surveillance du recouvrement infrarouge Download PDF

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Publication number
EP2330577A1
EP2330577A1 EP10193674A EP10193674A EP2330577A1 EP 2330577 A1 EP2330577 A1 EP 2330577A1 EP 10193674 A EP10193674 A EP 10193674A EP 10193674 A EP10193674 A EP 10193674A EP 2330577 A1 EP2330577 A1 EP 2330577A1
Authority
EP
European Patent Office
Prior art keywords
smoke
diodes
transmission signals
inlet openings
receiving diode
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Withdrawn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
EP10193674A
Other languages
German (de)
English (en)
Inventor
Davon Petrovic
Norbert Schaaf
Frank Redlich
Christoph Kroh
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.)
Atral-Secal GmbH
Original Assignee
Atral-Secal 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 Atral-Secal GmbH filed Critical Atral-Secal GmbH
Publication of EP2330577A1 publication Critical patent/EP2330577A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • G08B29/20—Calibration, including self-calibrating arrangements

Definitions

  • Smoke detectors are used for the early detection of fires. There are various detection principles known as radioactive or optical scattered light, just to name two. Smoke detectors intended for use in commercial or industrial plants must comply with the properties and functions of, inter alia, DIN EN 54-ff.
  • the demand of the customer is a standalone smoke detector, which, in contrast to the industrial alarms, also has the alarm display function as well as an alarm that indicates the presence of a danger to the user present.
  • the smoke detector which is operated as a standalone smoke detector, must have its own power supply, since it is not supplied via a mains network from the fire alarm control panel, as in industrial alarms.
  • CEN / TC72 developed the European standard DIN EN 14604 "Smoke detectors" as a product standard for the residential sector at European level.
  • This European standard is mandated by the European Commission and the European Free Trade Association within the framework of the EU Construction Products Directive (CPD) and forms the basis for the review of the "Smoke Detector" construction product harmonized with the CPD. If such smoke detectors have been tested in accordance with the DIN EN 14604 standard, there is a presumption that the prospective customer or user is more confident about the performance and quality standards of the so-called home smoke detector receives.
  • the DIN EN 14604 is valid since 01.08.2008.
  • a smoke alarm in the private sector if it is then installed, is then no longer perceived by the private user as a waiting device.
  • a transmitter diode radiates into a smoke chamber.
  • Various apertures or aperture functions prevent direct light entry into a receiving diode. Are there however particles, z. As smoke particles, in the smoke chamber, then light is reflected by the particles and detected by the receiving diode. It is therefore of the utmost importance that smoke particles can enter the smoke chamber.
  • the aim of this invention is to determine the sweeping over of a smoke detector or pasting a smoke detector and to check whether a standard smoke detection is still guaranteed by it is determined by cyclic examination of the detector itself, whether there is a change in the degree of coverage of the smoke inlet openings.
  • the aim of the invention is in other words the determination of whether the smoke inlet openings are free and not closed by tape, dust or other causes so far that a standard smoke detection is prevented.
  • a smoke detector for closed rooms with a housing in which a separate smoke chamber with smoke inlets is arranged, in which a measuring electronics is arranged, which generates an evaluable measurement signal upon detection of smoke particles, achieved in that at least two IR arranged in the housing -Sendioden whose transmit signals through the not or only partially covered smoke inlet openings into the interior of the smoke chamber, and at least one of the interior of the smoke chamber associated IR receiving diode is provided, which is provided for receiving the transmission signals from the at least two IR transmitting diodes wherein it is concluded from an interruption or reduction of the received transmission signals at the IR receiving diode to an at least partially cover the smoke inlet openings.
  • the invention takes advantage of the physical fact that a light beam is either reflected or absorbed on its way through materials. In both cases, a light intensity will be detected at the receiving diode, which does not correspond to the expected light intensity. If the received light intensity at the receiving diode deviates by an amount previously determined by various tests and falls below a minimum set in the electronics or in the evaluation unit, in one embodiment a fault message is generated.
  • the measuring electronics in the smoke chamber are independent of the electronics with which the continuity of the smoke inlet openings of the smoke chamber is determined.
  • the patency or the degree of coverage of the smoke inlet openings is determined. If it is determined that the smoke detector can no longer work in accordance with the standards due to a certain degree of coverage, a corresponding warning signal can be generated, which provides information that in the event of fire, smoke can no longer penetrate sufficiently quickly into the smoke chamber in order to avoid the actual measuring electronics for the smoke detector Smoke particles to be recognized.
  • the IR transmitter diodes and the IR receiver diode together with the transmitter so an upstream system, by means of which the operational capability of the smoke detector itself can be checked.
  • IR transmitter diodes For the standard-compliant function of the smoke detector, at least two IR transmitter diodes are necessary to determine the degree of coverage of the smoke inlet openings. A diode alone would not be able to smoke the smoke inlets to irradiate all around. The number two is the minimum for this. The more IR emitters are used, the safer the testing, but also increase the production costs.
  • the IR transmitting diodes are arranged at equidistant intervals around the smoke inlet openings.
  • Four IR transmit diodes result in an equidistant angular distance of 90 °. This results in the possibility of checking the smoke inlet openings in sub-segments of 90 °.
  • only one IR receiving diode is provided, which is embedded centrally in the smoke chamber, preferably in the bottom of the smoke chamber.
  • the transmission signals of the IR transmitter diodes are coupled by means of reflections to mirror surfaces in the interior of the smoke chamber. This results in a particularly compact design of the smoke detector.
  • a method for operating a smoke detector as mentioned above provides that the IR transmitting diodes are switched on one after the other to output their transmission signals and that the at least one IR receiving diode receives the transmission signals in succession, after which the transmission signals received from all the IR transmitting diodes Smoke inlets is closed.
  • a measurement cycle is completed when all IR transmit diodes have delivered their transmit signals and the evaluation in the at least one IR receive diode has ended.
  • a measuring cycle is carried out cyclically, for example once a week.
  • this operating method it is provided that, after each measuring cycle, it is determined whether a change in a predeterminable degree has occurred as a reference value relative to the at least one preceding measurement result, and if the transmission power of the IR transmitting diodes is increased so far as the change in this measure is exceeded in that the reference value is restored at the IR receiving diode. If, for example, the changes amount to a maximum of 1%, the transmission power of the IR transmitting diodes is increased to such an extent that the same value is detected at the IR receiving diode as in the previous measurement. Compensation may be performed until the compensated amount has reached the value set for the maximum acceptable smoke detector coverage for standard smoke detection.
  • Fig. 1 shows a vertical section through a smoke detector.
  • the housing 10 is an electronic evaluation unit 3 and the smoke chamber, which consists in the embodiment of a lower part 6 and an upper part 7. Furthermore, there is a measuring electronics 13 and 15 from transmitting or receiving diode, etc. within the housing 10. This transmitting and receiving diode is used for the actual detection of smoke particles in the smoke chamber.
  • a power supply 4 and a sound generator 12 are located in the housing 10.
  • the upper part 7 of the smoke chamber has smoke inlet openings 11.
  • the insect screen commonly used to protect against insects.
  • IR transmitter diodes 1 which radiate vertically upwards.
  • the transmission signals are directed into the interior of the smoke chamber 6, 7 due to mirror surfaces 8 and 9.
  • the mirror surface 9 initially ensures that the transmission signals are deflected by 90 ° inwards into the smoke inlet openings 11. From there, the transmission signal reaches the mirror surface 8, wherein it is again deflected by 90 ° downwards, where it then encounters the only in this embodiment IR receiving diode 2, which is embedded in the bottom of the lower part 6 of the smoke chamber.
  • Fig. 2 shows in plan view the arrangement of the mirror surfaces 9, wherein each mirror surface 9 is associated with a transmitting diode 1.
  • Fig. 3 is the arrangement of four IR transmit diodes 1 shown in the present case.
  • the operation method can be carried out so that the four IR transmitting diodes 1 are turned on one after another and the IR receiving diode 2 is set to receive. After all four IR transmitter diodes 1 their Transmitted transmit signals and the IR receiving diode 2 has received all four signals, a measuring cycle is completed. Due to the special arrangement of the four IR-emitting diodes 1, it is possible to individually check sub-segments of the smoke detector of 90 ° or close from the sum of the four results on all-round contamination or gluing or sweeping.
  • the electronic evaluation unit 3 evaluates the incoming signal of the IR receiving diode 2 and compares this with a predetermined value, which has been determined on the basis of various fire tests.
  • the fire tests serve to determine the maximum acceptable degree of coverage.
  • various so-called standard test fires are used, which serve to determine the speed of detection of the smoke detector.
  • the maximum allowable value of coverage is determined by experiment, with the maximum coverage being that at which the test fire still results in detection of smoke within the standard.

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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)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP10193674A 2009-12-04 2010-12-03 Détecteur de fumée doté d'une surveillance du recouvrement infrarouge Withdrawn EP2330577A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009047533A DE102009047533A1 (de) 2009-12-04 2009-12-04 Rauchmelder mit Infrarot-Abdecküberwachung

Publications (1)

Publication Number Publication Date
EP2330577A1 true EP2330577A1 (fr) 2011-06-08

Family

ID=43567800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10193674A Withdrawn EP2330577A1 (fr) 2009-12-04 2010-12-03 Détecteur de fumée doté d'une surveillance du recouvrement infrarouge

Country Status (2)

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EP (1) EP2330577A1 (fr)
DE (1) DE102009047533A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP3073458A1 (fr) * 2015-03-23 2016-09-28 Siemens Schweiz AG Dispositif d'alerte d'incendie doté d'un agencement à écran diffusant dans la zone d'un orifice d'entrée de fumée destiné à la surveillance de l'encrassement
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
EP4242639A1 (fr) * 2022-03-07 2023-09-13 Carrier Corporation Systèmes et procédés de détection de blocage dans des détecteurs de gaz
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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112466084B (zh) * 2020-11-25 2022-02-15 江苏中实电子有限公司 一种电气火灾监控探测器及其报警方法
CN112542019B (zh) * 2020-12-02 2022-07-22 江苏新力科技实业有限公司 一种自带迷宫式报警系统的传感器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060007010A1 (en) * 2004-07-09 2006-01-12 Tyco Safety Products Canada Ltd. Smoke detector calibration
EP1857989A1 (fr) * 2006-05-17 2007-11-21 Techem Energy Services GmbH Alerte d'incendie et procédé de vérification de sa capacité de fonctionnement
EP2028631A2 (fr) * 2007-08-21 2009-02-25 Hekatron Vertriebs GmbH Détecteur de fumée doté d'une surveillance de l'encrassement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4333911C2 (de) * 1993-10-05 1998-10-22 Preussag Ag Minimax Optischer Rauchmelder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060007010A1 (en) * 2004-07-09 2006-01-12 Tyco Safety Products Canada Ltd. Smoke detector calibration
EP1857989A1 (fr) * 2006-05-17 2007-11-21 Techem Energy Services GmbH Alerte d'incendie et procédé de vérification de sa capacité de fonctionnement
EP2028631A2 (fr) * 2007-08-21 2009-02-25 Hekatron Vertriebs GmbH Détecteur de fumée doté d'une surveillance de l'encrassement

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP3073458A1 (fr) * 2015-03-23 2016-09-28 Siemens Schweiz AG Dispositif d'alerte d'incendie doté d'un agencement à écran diffusant dans la zone d'un orifice d'entrée de fumée destiné à la surveillance de l'encrassement
WO2016150613A1 (fr) * 2015-03-23 2016-09-29 Siemens Schweiz Ag Détecteur d'incendie présentant un dispositif de lumière diffusée au niveau d'une ouverture d'entrée de fumée en vue de la surveillance de l'encrassement
CN107646129A (zh) * 2015-03-23 2018-01-30 西门子瑞士有限公司 火灾报警器，有在烟雾进口区域中监控污染的散射光组件
CN107646129B (zh) * 2015-03-23 2019-12-24 西门子瑞士有限公司 火灾报警器，有在烟雾进口区域中监控污染的散射光组件
US10573167B2 (en) 2015-03-23 2020-02-25 Siemens Schweiz Ag Fire detector with a scattered light arrangement
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
EP4242639A1 (fr) * 2022-03-07 2023-09-13 Carrier Corporation Systèmes et procédés de détection de blocage dans des détecteurs de gaz
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
WO2023174641A1 (fr) 2022-03-18 2023-09-21 Siemens Schweiz Ag Détecteur d'incendie à thermistances non chauffées, en particulier ntc, pour la capture de fluctuations thermiques dans la région des ouvertures d'entrée, et procédé correspondant

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Publication number Publication date
DE102009047533A1 (de) 2011-06-09

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