EP0917121B1 - Un système d'alarme addressable - Google Patents

Un système d'alarme addressable Download PDF

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Publication number
EP0917121B1
EP0917121B1 EP98308562A EP98308562A EP0917121B1 EP 0917121 B1 EP0917121 B1 EP 0917121B1 EP 98308562 A EP98308562 A EP 98308562A EP 98308562 A EP98308562 A EP 98308562A EP 0917121 B1 EP0917121 B1 EP 0917121B1
Authority
EP
European Patent Office
Prior art keywords
sensor
sensors
activated
address code
address
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 - Lifetime
Application number
EP98308562A
Other languages
German (de)
English (en)
Other versions
EP0917121A3 (fr
EP0917121B8 (fr
EP0917121A2 (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 LIMITED
Original Assignee
RAFIKI HOLDINGS 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 RAFIKI HOLDINGS Ltd filed Critical RAFIKI HOLDINGS Ltd
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
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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 fire 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.
  • EP 0 734 005 discloses an addressable fire alarm system comprising a plurality of sensors arranged to transmit an alarm signal when activated by smoke or heat, and a control circuit arranged to monitor for a signal from the sensors in an address mode of the circuit and to transmit successive address codes to each sensor as they are successively activated, each activated sensor comprising means for receiving and storing said transmitted 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.
  • US 4 855 713 discloses an addressable security alarm system in which the control circuit will only respond to sensors having a recognised address code.
  • the control circuit is programmed with the address codes of the sensors to be recognised by causing a tamper alarm condition at each sensor in an address mode of the system.
  • 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.
  • the sensors are cheap to manufacture since additional sensing circuitry and switches of the type used in EP 0 734 005 are not required.
  • the system merely relies on each sensor transmitting an alarm signal caused by the application of heat or smoke 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.
  • 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)

Claims (7)

  1. Un système d'alarme au feu adressable comprenant une pluralité de capteurs (10) agencés pour transmettre un signal d'alarme lorsqu'ils sont activés par la fumée ou la chaleur et un circuit de commande (13) agencé pour surveiller un signal en provenance des capteurs (10) dans un mode adresse du circuit (13) et pour transmettre des codes d'adresse successifs à chaque capteur (10) à mesure qu'ils sont successivement activés, chaque capteur (10) activé comprenant des moyens de réception et de stockage dudit code d'adresse transmis,
    caractérisé en ce que le circuit de commande (13) est agencé pour transmettre un code d'adresse à un capteur (10) activé en réponse à un signal d'alarme généré par l'action de la chaleur ou de la fumée dessus.
  2. Un système d'alarme au feu adressable tel que revendiqué dans la revendication 1,
    caractérisé en ce que chaque capteur (10) est agencé pour recevoir et stocker son code d'adresse dans un laps de temps prédéterminé après que ladite condition d'alarme a été détectée.
  3. Un système d'alarme au feu adressable tel que revendiqué dans les revendications 1 ou 2,
    caractérisé en ce que chaque capteur (10) est agencé pour transmettre son code d'adresse stocké avec ledit signal d'alarme lorsqu'une condition d'alarme est détectée dans un mode en attente du circuit (13).
  4. Un système d'alarme au feu adressable tel que revendiqué dans l'une quelconque des revendications précédentes,
    caractérisé en ce que chaque capteur (10) est agencé pour émettre un signal pour indiquer qu'il a reçu et stocké un code d'adresse.
  5. Un système d'alarme au feu adressable tel que revendiqué dans l'une quelconque des revendications précédentes,
    caractérisé en ce que chaque capteur (10) est agencé pour transmettre un signal d'accusé de réception au circuit de commande (13) pour indiquer qu'il a reçu et stocké son code d'adresse.
  6. Un système d'alarme au feu adressable tel que revendiqué dans la revendication 5,
    caractérisé en ce que le circuit de commande (13) est agencé pour s'incrémenter à un code d'adresse suivant lors de la réception dudit signal d'accusé réception.
  7. Un procédé de programmation de capteurs (10) d'un système d'alarme au feu adressable avec des codes d'adresse, comprenant l'activation successive des capteurs (10) dont les adresses doivent être fixées, la surveillance, par un circuit de commande (13), d'un signal transmis par un capteur (10) activé et la transmission des codes d'adresse successifs aux capteurs respectifs (10) à mesure qu'ils sont successivement activés et la réception et le stockage aux capteurs (10) successivement activés, de leur code d'adresse respectif reçu du circuit de commande (13), caractérisé en ce que les capteurs (10) sont successivement activés par action de chaleur ou fumée dessus.
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 EP0917121A2 (fr) 1999-05-19
EP0917121A3 EP0917121A3 (fr) 1999-09-15
EP0917121B1 true 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)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2095014B (en) * 1981-03-18 1984-06-27 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
IT1277178B1 (it) * 1995-03-24 1997-11-05 Bticino Spa Sistema di ricezione e di gestione di segnali digitali provenienti da dispositivi elettronici atto all'apprendimento delle informazioni
GB9623764D0 (en) * 1996-11-15 1997-01-08 Menvier Electronic Eng Ltd 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
EP0917121A2 (fr) 1999-05-19

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