EP0141987B1 - Verfahren zur Alarmsignalisation und Einrichtung zur Anwendung desselben - Google Patents

Verfahren zur Alarmsignalisation und Einrichtung zur Anwendung desselben Download PDF

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Publication number
EP0141987B1
EP0141987B1 EP84111528A EP84111528A EP0141987B1 EP 0141987 B1 EP0141987 B1 EP 0141987B1 EP 84111528 A EP84111528 A EP 84111528A EP 84111528 A EP84111528 A EP 84111528A EP 0141987 B1 EP0141987 B1 EP 0141987B1
Authority
EP
European Patent Office
Prior art keywords
detector
time
period
response
test
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.)
Expired
Application number
EP84111528A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0141987A3 (en
EP0141987A2 (de
Inventor
Jürg Dr. sc. nat. Muggli
Alfred Dr. Sc. Nat. Wuethrich
Andreas Dr. Rer. Nat. Scheidweiler
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.)
Cerberus AG
Original Assignee
Cerberus AG
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Filing date
Publication date
Application filed by Cerberus AG filed Critical Cerberus AG
Priority to AT84111528T priority Critical patent/ATE30646T1/de
Publication of EP0141987A2 publication Critical patent/EP0141987A2/de
Publication of EP0141987A3 publication Critical patent/EP0141987A3/de
Application granted granted Critical
Publication of EP0141987B1 publication Critical patent/EP0141987B1/de
Expired 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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
    • 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
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components

Definitions

  • the invention relates to a method for alarm signaling, in which after a first response of a detector connected to a signaling center, this is reset for the first time by the signaling center, in which, furthermore, two test times with predetermined different times in the signaling center after the detector has responded Running times are started and an alarm signal is only forwarded after the detector has responded again at least once, if the detector responds a second time after the test time has been shorter and before the test time has lasted longer, and a device for using this method.
  • Such methods and devices are suitable for signaling various types of dangerous states by means of suitable detectors which respond to the relevant state.
  • An important application is, for example, the signaling of a fire outbreak by means of a fire phenomenon, e.g. B. smoke, fire aerosol, fire gases, flame radiation, temperature variations etc., appealing fire detectors or the signaling of the presence of flammable and / or toxic gases.
  • fire alarm systems should signal a fire at the earliest possible stage and initiate appropriate control measures.
  • highly sensitive automatic fire detectors which already react to the phenomena occurring in the early stages of a fire, e.g. B. ionization smoke detectors or optical smoke detectors.
  • B. ionization smoke detectors or optical smoke detectors e.g. B. ionization smoke detectors or optical smoke detectors.
  • such fire detectors are operated with the highest possible sensitivity, there is a risk of an alarm signal being triggered by disturbance variables, even though there is no dangerous state, i.e. there is no fire, and that due to such a fault; or false alarms unnecessarily expensive fire-fighting measures are started, e.g. B. the fire brigade is deployed or an extinguishing system is put into operation.
  • Fire signaling methods such as those used in B. in CH 623 154 or in the Cerberus brochure FP 198: M. Ruggli / F. Datwyler's "Cerberus alarm concept" are described by involving people in the decision-making process.
  • An alarm signal triggered after a fire detector has responded one or more times is then only forwarded if no control personnel are available, or if the signal is not acknowledged within a certain control period, and if, within a longer period of time, there is no report of the real danger status from a transmitter Exploration team arrives.
  • DE-OS-2 816 192 for a fire alarm system which interrupts the detector voltage at least once for an adjustable time after the first alarm signal and which is immediately present when the detector operating voltage is switched on again Displays alarm signals as a fault and forwards alarm signals that arrive with a certain delay as real alarms.
  • the fire alarm control panel described here is therefore designed not to pass on a permanent response to a detector as a result of a defect as an alarm, and only secondarily to suppress false alarms as a result of brief edge effects, with signals from all detectors, in particular those with and without a time-delayed response, being the same are processed.
  • the object of the invention is to eliminate the disadvantages of the prior art mentioned, and in particular to further develop the method and the device of the type mentioned at the outset in such a way that the security of the Alarm signaling is improved, false or false alarms being largely avoided.
  • Another object of the invention is to design the alarm signaling method in such a way that when the system is occupied by control personnel, human error is eliminated as far as possible.
  • this object is achieved in a method for alarm signaling of the type defined at the outset in that the signal center resets the detector a second time if it responds a second time with the shorter duration before the test time has expired and in that case an alarm signal is triggered, if the detector responds a third time after a delay time that is shorter than the difference between the two test times before the test time has elapsed and that the signaling center returns to the initial state if there is no response of the detector before the test period with longer duration has elapsed.
  • FIG. 1 of a device for alarm signaling designed as a fire alarm system several alarm or fire detectors D are connected to a signal center S with a common line system L.
  • the fire detectors can be of the same type, e.g. B. to ionization fire detectors or optical smoke detectors, or to detectors reacting to other fire phenomena.
  • the fire detectors are expediently equipped with a self-holding circuit, so that the fire detectors respond when a threshold value is exceeded, e.g. B. the smoke concentration, remain in the alarmed state until a possible reset.
  • fire detectors of different types e.g. B. detectors with different response delays can be connected to the signal center at the same time, since their different properties are taken into account by the special design of the signal center, so that a special adaptation is unnecessary.
  • a practical exemplary embodiment of a device with commercially available ionization fire detectors as alarm detectors compared to known evaluation methods with reset and response repetition and two-stage classification (YES / NO ) achieve a surprising reduction in the frequency of false alarms in practical operation, up to a factor of 5.
  • the device according to the invention adjusts itself automatically to the response properties of the connected fire detectors, so that no adaptation measures are necessary.
  • FIG. 3 shows a timing diagram of such a device. After a first response (1.AL) of a fire detector, the corresponding detector group is reset and the time At until the next response (2.AL) is determined. If this time At is greater than a certain limit time t ', the second response (2.AL) is assessed as a new event and the entire cycle is started again. Otherwise, ie in the case of a shorter response time At, a control time V 1 ' which, for. B.
  • the control time V 1 can be interrupted by an acknowledgment signal Q, which signals the attention of the control personnel, and the exploration time V 2 can be interrupted by a reset signal E, or a manual alarm signal, which is triggered by a sent out exploration force. If these manual interruptions fail to occur, the detector group is automatically reset again at a time At before the control time V 1 or the exploration time V 2 has expired and the test times t and t 2 begin at these times t o and t oo to run. In the event of a repeated, ie the third response within the test time t 2 , an alarm signal AS is then triggered immediately, t, can be set to 0.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Emergency Alarm Devices (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Tumbler Switches (AREA)
  • Burglar Alarm Systems (AREA)
  • Electromechanical Clocks (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Sorption Type Refrigeration Machines (AREA)
EP84111528A 1983-10-17 1984-09-27 Verfahren zur Alarmsignalisation und Einrichtung zur Anwendung desselben Expired EP0141987B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111528T ATE30646T1 (de) 1983-10-17 1984-09-27 Verfahren zur alarmsignalisation und einrichtung zur anwendung desselben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH563383 1983-10-17
CH5633/83 1983-10-17

Publications (3)

Publication Number Publication Date
EP0141987A2 EP0141987A2 (de) 1985-05-22
EP0141987A3 EP0141987A3 (en) 1985-07-10
EP0141987B1 true EP0141987B1 (de) 1987-11-04

Family

ID=4296874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111528A Expired EP0141987B1 (de) 1983-10-17 1984-09-27 Verfahren zur Alarmsignalisation und Einrichtung zur Anwendung desselben

Country Status (11)

Country Link
US (1) US4568924A (es)
EP (1) EP0141987B1 (es)
JP (1) JPS60101696A (es)
AT (1) ATE30646T1 (es)
AU (1) AU561595B2 (es)
CA (1) CA1217541A (es)
DE (1) DE3467267D1 (es)
DK (1) DK494284A (es)
ES (1) ES8602280A1 (es)
FI (1) FI844052L (es)
NO (1) NO844149L (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115300A (ja) * 1984-06-29 1986-01-23 ホーチキ株式会社 火災警報装置
US4808972A (en) * 1986-05-29 1989-02-28 Cadin Electronics Pty. Ltd. Security system with false alarm inhibiting
US4792797A (en) * 1987-03-05 1988-12-20 Seatt Corporation Smoke detector having variable level sensitivity
USRE33920E (en) * 1987-03-05 1992-05-12 Seatt Corporation Smoke detector having variable level sensitivity
FR2618931B1 (fr) * 1987-07-28 1994-05-27 Morey Gilles Procede de fonctionnement d'une installation de surveillance
CA2113026A1 (en) * 1993-01-28 1994-07-29 Paul Michael Hoseit Methods and apparatus for intrusion detection having improved immunity to false alarms
JP3184429B2 (ja) * 1995-06-30 2001-07-09 ホーチキ株式会社 防災監視システムの端末感知装置
GB2308482B (en) * 1995-12-20 2000-03-29 Pyronix Ltd Event detection device with fault monitoring capability
US5786755A (en) * 1997-02-12 1998-07-28 At&T Corp Alarm escalation method
GB9820644D0 (en) * 1998-09-22 1998-11-18 Vimpex Limited Public address apparatus
GB2347772B (en) * 1999-03-12 2003-05-07 Manhar Amlani Fire alarm system
WO2000068906A1 (en) 1999-05-07 2000-11-16 C & K Systems, Inc. Glass-break detector and method of alarm discrimination
AU2001237589A1 (en) * 2000-03-31 2001-10-15 British Telecommunications Public Limited Company Alarm monitoring arrangement
US6856242B2 (en) * 2003-02-04 2005-02-15 Spiral Technologies Ltd. Automatic siren silencing device for false alarms
CN104992537B (zh) * 2015-06-26 2018-02-09 北京航天易联科技发展有限公司 一种信号处理方法和装置
CN106971521B (zh) * 2017-05-03 2018-09-21 山东科技大学 一种抖动报警和重复报警的在线消除方法与系统
US10600301B2 (en) * 2017-05-31 2020-03-24 Vistatech Labs Inc. Smoke device and smoke detection circuit
CN113313915B (zh) * 2021-02-19 2023-05-12 精英数智科技股份有限公司 一种基于瓦斯系统分级报警短信的处理方法及系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599195A (en) * 1968-05-31 1971-08-10 Pinkerton S Inc Dual alarm, coaxial line resonator, intrusion detection system
US3934145A (en) * 1973-10-25 1976-01-20 Emhart Corporation Ionization smoke detector and alarm system
JPS52153759A (en) * 1976-06-17 1977-12-21 Hochiki Co Storage type detector
CH623154A5 (en) * 1977-07-01 1981-05-15 Cerberus Ag Fire detection system
DE2732571A1 (de) * 1977-07-19 1979-02-01 Richter Axel Verfahren zum entstoeren von vorrichtungen, insbesondere von ueberwachungsanlagen
DE2816192C2 (de) * 1978-04-14 1986-02-20 Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München Brandmeldezentrale

Also Published As

Publication number Publication date
DE3467267D1 (en) 1987-12-10
ES536989A0 (es) 1985-11-16
JPH0430699B2 (es) 1992-05-22
US4568924A (en) 1986-02-04
DK494284A (da) 1985-04-18
AU3424884A (en) 1985-04-26
EP0141987A3 (en) 1985-07-10
DK494284D0 (da) 1984-10-16
ES8602280A1 (es) 1985-11-16
FI844052A0 (fi) 1984-10-15
AU561595B2 (en) 1987-05-14
NO844149L (no) 1985-04-18
CA1217541A (en) 1987-02-03
JPS60101696A (ja) 1985-06-05
ATE30646T1 (de) 1987-11-15
FI844052L (fi) 1985-04-18
EP0141987A2 (de) 1985-05-22

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