GB2376121A - Alarm monitoring arrangement - Google Patents

Alarm monitoring arrangement Download PDF

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Publication number
GB2376121A
GB2376121A GB0221943A GB0221943A GB2376121A GB 2376121 A GB2376121 A GB 2376121A GB 0221943 A GB0221943 A GB 0221943A GB 0221943 A GB0221943 A GB 0221943A GB 2376121 A GB2376121 A GB 2376121A
Authority
GB
United Kingdom
Prior art keywords
period
detector
time
alert
detectors
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.)
Granted
Application number
GB0221943A
Other versions
GB2376121B (en
GB0221943D0 (en
Inventor
Stephen Michael Reeder
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Publication of GB0221943D0 publication Critical patent/GB0221943D0/en
Publication of GB2376121A publication Critical patent/GB2376121A/en
Application granted granted Critical
Publication of GB2376121B publication Critical patent/GB2376121B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)
  • Alarm Systems (AREA)

Abstract

In an alarm monitoring arrangement, notification of an alert condition from a detector is deferred for a period of time determined in dependence on any history of false alerts from the detector. Thus in an environment having multiple detectors, any detector giving transmitting an alert and then clearing the alert prior to expiry of the allocated time period has its "time to respond" period increased in respect of subsequent activation. Periodically the time periods in respect of each detector may be reduced so that normally non-alerting detectors attain a shorter respond period than poorly positioned detectors which create most false alerts. The time period prior to response may be bounded by pre-determined maximum and minimum response periods.

Description

(57) In an alarm monitoring arrangement, notification of an alert
condition from a detector is deferred for a period of time determined in dependence on any history of false alerts from the detector. Thus in an environment having multiple detectors, any detector giving transmitting an alert and then clearing the alert prior to expiry of the allocated time period has its "time to respond" period increased in respect of subsequent activation. Periodically the time periods in respect of each detector may be reduced so that normally non-alerting detectors attain a shorter respond period than poorly positioned detectors which create most false alerts. The time period prior to response may be bounded by predetermined maximum and minimum response periods.
GB0221943A 2000-03-31 2001-03-07 Alarm monitoring arrangement Expired - Lifetime GB2376121B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00302713 2000-03-31
PCT/GB2001/000992 WO2001075835A1 (en) 2000-03-31 2001-03-07 Alarm monitoring arrangement

Publications (3)

Publication Number Publication Date
GB0221943D0 GB0221943D0 (en) 2002-10-30
GB2376121A true GB2376121A (en) 2002-12-04
GB2376121B GB2376121B (en) 2003-10-08

Family

ID=8172852

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0221943A Expired - Lifetime GB2376121B (en) 2000-03-31 2001-03-07 Alarm monitoring arrangement

Country Status (3)

Country Link
AU (1) AU2001237589A1 (en)
GB (1) GB2376121B (en)
WO (1) WO2001075835A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7693590B2 (en) * 2005-12-21 2010-04-06 Panasonic Electric Works Co., Ltd. Systems and methods for notifying of persistent states of monitored systems using distributed monitoring devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086574A (en) * 1975-07-25 1978-04-25 Hochiki Corporation Fire detection system
FR2395762A1 (en) * 1977-07-01 1979-01-26 Cerberus Ag FIRE WARNING
EP0141987A2 (en) * 1983-10-17 1985-05-22 Cerberus Ag Alarm signalling method and application device therefor
US4764755A (en) * 1987-07-27 1988-08-16 Detection Systems, Inc. Intruder detection system with false-alarm-minimizing circuitry
US4881060A (en) * 1988-11-16 1989-11-14 Honeywell Inc. Fire alarm system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086574A (en) * 1975-07-25 1978-04-25 Hochiki Corporation Fire detection system
FR2395762A1 (en) * 1977-07-01 1979-01-26 Cerberus Ag FIRE WARNING
EP0141987A2 (en) * 1983-10-17 1985-05-22 Cerberus Ag Alarm signalling method and application device therefor
US4764755A (en) * 1987-07-27 1988-08-16 Detection Systems, Inc. Intruder detection system with false-alarm-minimizing circuitry
US4881060A (en) * 1988-11-16 1989-11-14 Honeywell Inc. Fire alarm system

Also Published As

Publication number Publication date
AU2001237589A1 (en) 2001-10-15
WO2001075835A1 (en) 2001-10-11
GB2376121B (en) 2003-10-08
GB0221943D0 (en) 2002-10-30

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20210306