EP0917121A2 - Un système d'alarme addressable - Google Patents

Un système d'alarme addressable Download PDF

Info

Publication number
EP0917121A2
EP0917121A2 EP98308562A EP98308562A EP0917121A2 EP 0917121 A2 EP0917121 A2 EP 0917121A2 EP 98308562 A EP98308562 A EP 98308562A EP 98308562 A EP98308562 A EP 98308562A EP 0917121 A2 EP0917121 A2 EP 0917121A2
Authority
EP
European Patent Office
Prior art keywords
sensors
sensor
alarm system
alarm
activated
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
EP98308562A
Other languages
German (de)
English (en)
Other versions
EP0917121A3 (fr
EP0917121B8 (fr
EP0917121B1 (fr
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.)
RAFIKI HOLDINGS Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0917121A2 publication Critical patent/EP0917121A2/fr
Publication of EP0917121A3 publication Critical patent/EP0917121A3/fr
Application granted granted Critical
Publication of EP0917121B1 publication Critical patent/EP0917121B1/fr
Publication of EP0917121B8 publication Critical patent/EP0917121B8/fr
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
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/003—Address allocation methods and details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/001—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel

Definitions

  • This invention relates to an addressable alarm system.
  • Alarm systems which comprise a plurality of sensors connected to a cable which extends from a control panel.
  • the control panel is arranged to activate an alarm when one of the sensors detects an alarm condition.
  • European patent application No. 0 191 239 discloses an addressable alarm system in which each of the sensors has a unique address code, so that the control panel can address one or more of the sensors and so that the control panel can recognise which sensor has been activated.
  • each sensor comprises a plurality of switches which are set to give it a unique binary address code.
  • a disadvantage of this arrangement is that it is complicated for alarm engineers to understand and set these binary codes.
  • an addressable alarm system comprising a plurality of sensors arranged to transmit an alarm signal when activated by an alarm condition and a control circuit arranged to monitor the sensors in an ADDRESS mode and to transmit successive address codes to each sensor as they are successively activated, each sensor comprising means for receiving and storing its address code.
  • control circuit In use, the control circuit is set to its ADDRESS mode and the first sensor is activated.
  • the control circuit detects that a first sensor has been activated, whereupon it transmits a first address code to the activated sensor.
  • the activated sensor receives and stores the address code.
  • the second sensor is then activated whereupon the control circuit transmits the next address code to the activated sensor. This process is repeated until all of the sensors have been given an address code.
  • the sensors are cheap to manufacture since additional sensing circuitry and switches are not required.
  • the system merely relies on each sensor transmitting an alarm signal as a request for an alarm code, in the ADDRESS mode of the system.
  • each sensor is arranged to receive and store its address code within a predetermined time after an alarm condition has been detected.
  • each sensor is arranged to transmit its stored address code together with said alarm signal when an alarm condition is detected in a STANDBY mode of the circuit, so that the control circuit can determine which sensor has been activated.
  • each sensor is arranged to emit a signal to indicate that an address code has been received and stored: in this manner the alarm engineer knows that he can move onto the next sensor.
  • each sensor is arranged to transmit an acknowledgement signal to the control circuit to indicate that it has received and stored its address code, the control panel preferably being arranged to increment to the next address code upon receipt of said acknowledgement signal.
  • the alarm system comprises a fire alarm system, the sensors comprising heat and/or smoke sensors.
  • the engineer merely has to activate the sensors by applying heat or smoke as appropriate. It is well known to provide aerosol cans of smoke for testing fire alarms and it will be appreciated that these provide a convenient means for activating the sensors during setting of their address code.
  • a method of programming sensors of an addressable alarm system with address codes comprising successively activating the sensors whose addresses are to be set by creating an alarm condition at each sensor in succession, monitoring, at a control circuit, for an alarm signal transmitted by an activated sensor and transmitting successive address codes to respective sensors as they are successively activated and receiving and storing at the successively activated sensors, their respective address code received from the control circuit.
  • the sensors are activated by applying smoke or heat.
  • an addressable alarm system comprising a control panel 13 and a plurality of combined detector and sounder devices 10 connected in parallel across a pair of wires 11,12 having their opposite ends connected to the control panel.
  • a plurality of manual call points 14 are also connected in parallel across the wires 11,12.
  • the control panel 13 comprises a switch 15 which can be closed to place the control panel in an address mode.
  • Each detector/sounder device 10 comprises a memory for storing its address.
  • the devices 10 are preferably supplied with their addresses set to a default value, such as zero.
  • Each device 10 comprises a smoke sensor and a heat sensor mounted in an airway e.g. 16.
  • control panel 13 is set in the ADDRESS mode by closing the switch 15.
  • the engineer installing the alarm then moves to the location of the device 10 that he wants to be at address No. 1, whereupon he activates the device either by spraying smoke into the airway from an aerosol or by using a heat gun.
  • the activated device 10 then outputs a digital alarm signal onto the wires 11,12, the signal comprising an alarm code and the default address code of the device.
  • the control panel 13 detects the digital alarm signal and recognises the alarm code, whereupon it applies a digital address signal onto the wires 11,12.
  • the address signal comprises the first address code taken from an internal stack register.
  • the devices 10 are arranged to enter a PROGRAM mode for a short period after they have been activated. Accordingly, the activated device 10 receives and decodes the digital address signal transmitted by the control panel and applies the decoded address code to its memory, in place of the default code.
  • the device 10 Once the device 10 has received and stored its address code it preferably outputs an audible acknowledgement signal to the engineer, so that he knows that he can proceed to the next device 10 to be set. The device 10 also applies a digital acknowledgement signal onto the wires 11,12.
  • the control panel 13 detects the digital acknowledgement signal and increments to the next location in its stack register. The process is then repeated until all of the devices 10 have been assigned a unique address code from the stack register.
  • the control panel 13 is then returned to its STANDBY mode by closing the switch 15. If a digital alarm signal is detected by the circuit 13 in STANDBY mode, it applies a digital warning signal to the wires 11,12.
  • the control panel 13 is able to detect which device 10 has been activated, owing to digital alarm signal containing the address of the activated detector. Thus, the control panel 13 may apply a global or local warning signal to the wires 11,12 depending on how it is programmed to respond to the device 10 that is activated.
  • Each device 10 monitors the wires 11,12 and responds to digital signals that contain its address code or global digital signals. In this manner, a plurality of devices 10 on a single pair of wires can be individually controlled, activated, tested and inhibited etc.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
EP98308562A 1997-10-23 1998-10-20 Un système d'alarme addressable Expired - Lifetime EP0917121B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9722275A GB2330675B (en) 1997-10-23 1997-10-23 An addressable alarm system
GB9722275 1997-10-23

Publications (4)

Publication Number Publication Date
EP0917121A2 true EP0917121A2 (fr) 1999-05-19
EP0917121A3 EP0917121A3 (fr) 1999-09-15
EP0917121B1 EP0917121B1 (fr) 2003-07-23
EP0917121B8 EP0917121B8 (fr) 2007-10-17

Family

ID=10820893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98308562A Expired - Lifetime EP0917121B8 (fr) 1997-10-23 1998-10-20 Un système d'alarme addressable

Country Status (4)

Country Link
EP (1) EP0917121B8 (fr)
AT (1) ATE245843T1 (fr)
DE (1) DE69816565T2 (fr)
GB (1) GB2330675B (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2095014A (en) * 1981-03-18 1982-09-22 Casswell Peter Henry Alarm system
US4658243A (en) * 1983-11-08 1987-04-14 Nittan Company, Limited Surveillance control apparatus for security system
US4855713A (en) * 1988-10-07 1989-08-08 Interactive Technologies, Inc. Learn mode transmitter
EP0734005A1 (fr) * 1995-03-24 1996-09-25 Bticino S.P.A. Système de réception/gestion pour signaux numériques issus de dispositifs électroniques, et capables d'apprendre la configuration des capteurs, en particulier pour système d'alarme
GB2319373A (en) * 1996-11-15 1998-05-20 Menvier Allocating addresses to addressable devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2095014A (en) * 1981-03-18 1982-09-22 Casswell Peter Henry Alarm system
US4658243A (en) * 1983-11-08 1987-04-14 Nittan Company, Limited Surveillance control apparatus for security system
US4855713A (en) * 1988-10-07 1989-08-08 Interactive Technologies, Inc. Learn mode transmitter
EP0734005A1 (fr) * 1995-03-24 1996-09-25 Bticino S.P.A. Système de réception/gestion pour signaux numériques issus de dispositifs électroniques, et capables d'apprendre la configuration des capteurs, en particulier pour système d'alarme
GB2319373A (en) * 1996-11-15 1998-05-20 Menvier Allocating addresses to addressable devices

Also Published As

Publication number Publication date
GB9722275D0 (en) 1997-12-17
GB2330675B (en) 2001-06-20
EP0917121A3 (fr) 1999-09-15
ATE245843T1 (de) 2003-08-15
DE69816565T2 (de) 2004-04-15
DE69816565D1 (de) 2003-08-28
EP0917121B8 (fr) 2007-10-17
GB2330675A (en) 1999-04-28
EP0917121B1 (fr) 2003-07-23

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