EP2261873A1 - Système d'alarme en cas d'incendie - Google Patents

Système d'alarme en cas d'incendie Download PDF

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Publication number
EP2261873A1
EP2261873A1 EP09161609A EP09161609A EP2261873A1 EP 2261873 A1 EP2261873 A1 EP 2261873A1 EP 09161609 A EP09161609 A EP 09161609A EP 09161609 A EP09161609 A EP 09161609A EP 2261873 A1 EP2261873 A1 EP 2261873A1
Authority
EP
European Patent Office
Prior art keywords
detector
control panel
sensor
alarm system
fire alarm
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Withdrawn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
EP09161609A
Other languages
German (de)
English (en)
Inventor
Manhar Amlani
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.)
Red Dot Technologies Ltd
Original Assignee
Red Dot Technologies Ltd
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 Red Dot Technologies Ltd filed Critical Red Dot Technologies Ltd
Priority to EP09161609A priority Critical patent/EP2261873A1/fr
Publication of EP2261873A1 publication Critical patent/EP2261873A1/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Withdrawn legal-status Critical Current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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
    • 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

Definitions

  • This invention relates to a fire alarm system.
  • Fire alarm systems are well known which comprise a plurality of heat and/or smoke detectors connected across one or more pairs of wires extending from the control panel.
  • the detectors are able to sense the presence of heat and/or smoke when activated and to provide an indication to the control panel: this then triggers and alarm condition at the control panel which activates one or more audible warning devices or so-called sounders.
  • testing is carried out by setting the control panel into a test mode. An engineer then visits each detector in turn and applies heat or smoke to the detector using an artificial source. This then activates the detector: the detector may omit the visible indication when it is activated. Another engineer with a two-way radio can then examine the control panel to determine whether or not the detector has triggered an alarm condition. This process is then repeated for each detector.
  • a disadvantage of this process is that it is disruptive to the occupants of the building in which the detectors are located. Furthermore, some of the detectors may be inaccessible, for example because they are located in a locked rooms or apartments. Other detectors may be hidden from view or mounted in an out-of-reach location.
  • WO2006/064190 discloses a synthetic smoke generator which, in one embodiment, is mounted on a pole and can be used by an engineer in the aforementioned manner to activate each detector in turn.
  • the smoke generator could be mounted at a fixed location adjacent the detector.
  • the website of the company marketing this product discloses that the fixed generator could be activated remotely via wall-mounted socket positioned in the facility of the detector (see http://www.detectortesters.com/site/library/news/Scorpionnews.html ). This arrangement is complex in construction, costly to install and still does not solve the above-mentioned problems of disruption and inaccessibility.
  • a fire alarm system comprising a control panel and a plurality of detectors connected to the control panel, each detector comprising a sensor for activating the detector when heat and/or smoke is detected and test means for stimulating the sensor to activate the detector, the control panel for comprising means for actuating the test means of a detector and means for providing an indication of whether the detector has and/or has not been activated in response to stimulation by said test means.
  • control panel can thus remotely test each detector without the need for an engineer to locate or visit each detector. In this manner, the above-mentioned problems are alleviated.
  • the senor and the test means are mounted inside an external housing of the detector.
  • the test means may comprise a smoke generator or a heat generator mounted adjacent the sensor of the detector.
  • the test means may comprise means for increasing the amount of light incident on a photo sensor disposed inside an optical smoke-sensing chamber of the detector: This may be achieved by actuating a member to extend into the chamber, thereby increasing the amount of light which is reflected towards the photo sensor.
  • the member may be actuated by an electro-mechanical device such as a solenoid.
  • the actuating means of the control panel preferably actuates the test means of each detector either in turn or simultaneously in a test routine.
  • the actuating means of the control panel may be arranged to initiate the test routine periodically.
  • the control panel may comprise an actuator which performs the test routine when actuated by an engineer or other person.
  • the actuating means of the control panel is arranged to actuate the test means of successive detectors when the actuating means is successively actuated by an engineer or other person.
  • the actuating means may be arranged for remote actuation, for example via the internet or a wireless connection.
  • the indication means of the control panel may be arranged to provide an audible and/or visible indication only if all of the detectors are activated.
  • the indication may be provided by triggering with the control panel into an alarm condition.
  • the control panel is arranged to inhibit sounders of the alarm system whilst the detectors are tested, so as not to disturb the occupant
  • the indication means preferably provides an indication of which detectors have not been activated.
  • each detector preferably comprises an address code, the control panel being arranged to determine the address code of the detectors which have and/or not been activated by said stimulation.
  • the indication means is arranged to log whether the detectors have and/or not been activated in response to said stimulation by said test means.
  • the log may only show or highlight detectors which have not been activated.
  • the log can be stored or printed to provide evidence that the system has been tested.
  • a method of testing a fire alarm system comprising a control panel and a plurality of detectors connected to the control panel, each detector comprising a sensor for activating the detector when heat/or smoke is detected and test means for stimulating the sensor to activate the detector, the method comprising actuating the control panel to cause said test means to stimulate a detector and determining at the control panel whether the detector has and/or has not been activated.
  • the stimulation may be provided by applying heat or smoke to the sensor or by increasing the amount of light incident on a photo sensor disposed inside an optical smoke-sensing chamber of the detector.
  • a control panel 10 of a fire alarm system there is shown a control panel 10 of a fire alarm system.
  • a pair of wires 11, 12 extend from the control panel 10 and a plurality of detectors, e.g. 13, 14 and 15 are connected in parallel across the wires 11, 12.
  • the detector 13 comprises a heat sensor 16 such as a thermistor and a heat generating device 17 mounted below the sensor 16.
  • the heat generating device 17 may comprise a resistor or a coil.
  • the detector 14 comprises a smoke sensor 18 and a smoke generator 19 mounted below the sensor 18.
  • the smoke generator 19 may generate synthetic smoke or it may generate actual smoke, for example by heating or burning a material such as a hydrocarbon. Other kind of smoke generators may be used which will be readily apparent to those skilled in the art.
  • the detector 15 comprises an optical smoke-sensing chamber 20 which is provided with an optical emitter 21 and a photo sensor 22.
  • the detector 15 is activated when smoke particles inside the chamber 20 cause an increase in the amount of light emitted by the emitter 21 reaching the photo sensor 22.
  • a solenoid 23 or other electro-mechanical actuation device is mounted adjacent the optical smoke-sensing chamber 20.
  • the solenoid 23 comprises a moveable armature 24 which extends into the chamber 20 when the coil of the solenoid 23 is activated.
  • the movable armature 24 of the solenoid 23 is formed of an optically reflective material, which thus increases the amount of light reflected towards the photo sensor 22, thereby simulating the presence of smoke.
  • the control panel 10 comprises a test circuit 40 which sends a coded test signal to each detector e.g. 13, 14, 15 in turn.
  • the detector 13 Upon receipt of the signal, the detector 13 energises the heat generating device 17: the excess heat is sensed by the heat sensor 16 and the detector 17 activates into an alarm condition. The alarm condition is then registered in a logging circuit 41 of the control panel 10. In the event that the detector 13 is not activated in response to the test signal, then this is also recorded in the logging circuit 41.
  • a similar process is then carried out for each detector eg 14, 15 in turn.
  • the smoke generator 19 is actuated to cause smoke to be sensed by the sensor 18.
  • the solenoid 23 is actuated, in order to cause the moveable armature 24 to extend into the optical-smoke chamber 20.
  • test procedure may be initiated at regular intervals by a timer control device disposed inside the control panel 10. Alternatively, it may be initiated by actuating a manual control device, such as a button 43 disposed on the control panel 10.
  • the control panel 10 may also be connected to a communications network 42, so that the test routine can be initiated remotely.
  • the logging circuit 41 provides an indication of which detectors e.g 13, 14, 15 have and/or not been activated by the test routine. This indication may be provided by a visual display panel (not shown) provided on the control panel 10. Alternatively, the logging circuit 41 can be interrogated by an external device, such as a laptop computer connected directly to the control panel or connected via the network 42.
  • An alarm system in accordance with the present invention thus reliably enables detectors to be detected on a regular basis without the need to physically access each detector in turn. In this manner, the problems associated with causing disturbance and accessing the detectors is alleviated.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
EP09161609A 2009-05-29 2009-05-29 Système d'alarme en cas d'incendie Withdrawn EP2261873A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09161609A EP2261873A1 (fr) 2009-05-29 2009-05-29 Système d'alarme en cas d'incendie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09161609A EP2261873A1 (fr) 2009-05-29 2009-05-29 Système d'alarme en cas d'incendie

Publications (1)

Publication Number Publication Date
EP2261873A1 true EP2261873A1 (fr) 2010-12-15

Family

ID=41262143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09161609A Withdrawn EP2261873A1 (fr) 2009-05-29 2009-05-29 Système d'alarme en cas d'incendie

Country Status (1)

Country Link
EP (1) EP2261873A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104464231A (zh) * 2014-12-05 2015-03-25 国家电网公司 消防火灾报警探测器试验器
JP2015135584A (ja) * 2014-01-17 2015-07-27 ホーチキ株式会社 防災監視設備及びその遠隔操作方法
GB2539954A (en) * 2015-07-03 2017-01-04 Ramtech Electronics Ltd A test apparatus
JP2017204807A (ja) * 2016-05-13 2017-11-16 ホーチキ株式会社 管理システム
KR101853919B1 (ko) 2017-09-29 2018-05-02 주식회사 신원기술단 다목적 화재 경보기
DE102021207817A1 (de) 2021-07-21 2023-01-26 Robert Bosch Gesellschaft mit beschränkter Haftung Brandmeldeanordnung sowie Verfahren zur Selbstüberwachung der Brandmeldeanordnung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176600A (en) * 1985-06-21 1986-12-31 Francis Edward Mckenna Fire hazard detection system
US5105370A (en) * 1988-04-14 1992-04-14 Fike Corporation Environmental detection system useful for fire detection and suppression
US20040035179A1 (en) * 2000-09-29 2004-02-26 Hubert Koch Gas or heat detector, gas or heat generator, flue gas generator, method for testing a gas detector or a heat detector, and method for testing a flue gas detector
WO2006064190A1 (fr) 2004-12-13 2006-06-22 Sata Limited Generateur de fumee synthetique et testeur de detecteur de fumee utilisant un tel generateur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176600A (en) * 1985-06-21 1986-12-31 Francis Edward Mckenna Fire hazard detection system
US5105370A (en) * 1988-04-14 1992-04-14 Fike Corporation Environmental detection system useful for fire detection and suppression
US20040035179A1 (en) * 2000-09-29 2004-02-26 Hubert Koch Gas or heat detector, gas or heat generator, flue gas generator, method for testing a gas detector or a heat detector, and method for testing a flue gas detector
WO2006064190A1 (fr) 2004-12-13 2006-06-22 Sata Limited Generateur de fumee synthetique et testeur de detecteur de fumee utilisant un tel generateur

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015135584A (ja) * 2014-01-17 2015-07-27 ホーチキ株式会社 防災監視設備及びその遠隔操作方法
CN104464231A (zh) * 2014-12-05 2015-03-25 国家电网公司 消防火灾报警探测器试验器
GB2539954A (en) * 2015-07-03 2017-01-04 Ramtech Electronics Ltd A test apparatus
JP2017204807A (ja) * 2016-05-13 2017-11-16 ホーチキ株式会社 管理システム
KR101853919B1 (ko) 2017-09-29 2018-05-02 주식회사 신원기술단 다목적 화재 경보기
DE102021207817A1 (de) 2021-07-21 2023-01-26 Robert Bosch Gesellschaft mit beschränkter Haftung Brandmeldeanordnung sowie Verfahren zur Selbstüberwachung der Brandmeldeanordnung

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