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WO2006087566A1 - Systeme de detection de fumee et d'alarme incendie commandable a distance sans fil - Google Patents

Systeme de detection de fumee et d'alarme incendie commandable a distance sans fil Download PDF

Info

Publication number
WO2006087566A1
WO2006087566A1 PCT/GB2006/000563 GB2006000563W WO2006087566A1 WO 2006087566 A1 WO2006087566 A1 WO 2006087566A1 GB 2006000563 W GB2006000563 W GB 2006000563W WO 2006087566 A1 WO2006087566 A1 WO 2006087566A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
smoke
test
message
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.)
Ceased
Application number
PCT/GB2006/000563
Other languages
English (en)
Inventor
Simon Mcgivern
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.)
LOCCA TECH Ltd
Original Assignee
LOCCA TECH 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
Priority claimed from GBGB0503452.5A external-priority patent/GB0503452D0/en
Priority claimed from GB0525247A external-priority patent/GB2423397A/en
Application filed by LOCCA TECH Ltd filed Critical LOCCA TECH Ltd
Priority to EP06709800A priority Critical patent/EP1851743A1/fr
Priority to US11/884,512 priority patent/US20090212961A1/en
Priority to CA002597090A priority patent/CA2597090A1/fr
Publication of WO2006087566A1 publication Critical patent/WO2006087566A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • 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
    • G08B25/001—Alarm cancelling procedures or alarm forwarding decisions, e.g. based on absence of alarm confirmation
    • 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
    • G08B25/007—Details of data content structure of message packets; data protocols
    • 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
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • 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
    • G08B25/12—Manually actuated calamity alarm transmitting arrangements emergency non-personal manually actuated alarm, activators, e.g. details of alarm push buttons mounted on an infrastructure
    • 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
    • G08B25/14—Central alarm receiver or annunciator arrangements
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
    • 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

  • the present invention relates to smoke alarm systems and more particularly to a wireless fire and smoke alarm system.
  • a smoke alarm system comprising: a plurality of units including at least one smoke alarm and at least one base station; wherein the or each base station includes: a transmitter within the housing for transmitting to the at least one smoke alarm; means for causing the transmitter to transmit a learn signal including a serial number of the base station; and means for causing the transmitter to transmit a test signal including the serial number; wherein the or each smoke alarm includes: a battery; a sounder for sounding an alarm; a receiver for receiving signals transmitted from the base station or stations; a test button arranged to operate the smoke alarm to sound when the test button is actuated; a learn button arranged to cause the smoke alarm to enter a learn mode when the button is pressed and in the learn mode to listen for a learn signal on the receiver, and to store the serial number transmitted in the learn signal when the smoke alarm receives a learn signal when in the learn mode; and a smoke detector for sounding an alarm when exposed to smoke.
  • the base station can control a number of units.
  • the invention makes it possible to simply add a new smoke alarm in a simple manner which in turn permits the device to have minimal complexity, hi particular, the approach is able to operate with messages transmitted only from base station to smoke detector, instead of multiple two way messages as required by Marman.
  • the base station unit is a plug in unit.
  • a plug-in base station unit i.e. a unit which is made up simply of a housing, with pins coming out of the housing, the unit may be supported by a conventional mains socket.
  • a simple convenient unit is provided that may be positioned by the user where required without the need for wiring.
  • the central unit being mains powered, does not require batteries, though in preferred embodiments rechargeable batteries are provided to allow the unit to operate in the event of a failure of mains power, which may for example occur during a fire.
  • such a unit may be conveniently positioned in the user's kitchen, which is often the location for false smoke alarms, at a position close to the hob or oven.
  • the smoke alarm may be conveniently controlled from the base unit.
  • Smoke alarms must be mounted either on the ceiling or typically within 15cm of it, so they are frequently not within convenient reach. Therefore, users may need to stand on a support, for example a chair, to reach the smoke alarm. This can be conveniently avoided by simply plugging in a base unit at a lower level in a convenient location, for example within the kitchen.
  • the base station may further include a panic button arranged to cause the base station to transmit a panic message to the other units to cause the other units to sound an alarm when the panic button is operated.
  • the invention thus adds the functionality of a panic alarm simply by using existing smoke detectors.
  • the panic alarm can conveniently be located and moved by the user simply by plugging the base station into a convenient location.
  • the units may each include a system address value unit setting a system address value in common for the system, the units being arranged to broadcast messages including the system address value and a message type value, the message type value indicating one of a plurality of messages including a smoke alarm mute message, a test message, and a smoke alarm message, the messages being broadcast to all other units of the system.
  • Preferred embodiments of the base station include a test/mute control, arranged to broadcast a message to all smoke alarms of the system on operation of the test control to mute the smoke alarms if any of the smoke alarms of the system are active and otherwise to test the smoke alarms of the system.
  • the system does not require complex protocols for communication between the base station and individual detectors.
  • the smoke alarm unit may be arranged to transmit a battery low message when a low battery condition is present in the respective smoke alarm; and the base unit is arranged to sound an audible warning sound when it receives a battery low message.
  • a particular benefit of the invention is that it can work with multiple base stations.
  • the base stations do not need to be separately programmed but each can simply be plugged in.
  • the invention provides a base station for use in a smoke alarm system including at least one smoke alarm including a battery, a smoke detector, a sounder, and a transmitter and receiver, the base station comprising: a housing; a receiver within the housing for communicating with the at least one smoke alarm; a plurality of pins extending from the housing, the pins and housing cooperating to define a unitary plug for connection to an electrical supply socket, so that the base station is supported by the pins when the plug is inserted into an electrical supply socket.
  • the base station may further include a rechargeable battery pack.
  • the invention also relates to a method of operating a smoke alarm system including a plurality of smoke alarm units, comprising: plugging at least one base unit into a respective electrical power socket to be supported by the socket; and controlling the smoke alarm units by silencing any sounding smoke alarms of the system when a control on the base unit is actuated; and testing the smoke alarm system when the control on the base unit is actuated.
  • Figure 1 shows a schematic drawing of a base station of an embodiment of the invention
  • Figure 2 is a schematic of a smoke alarm unit
  • Figure 3 shows a schematic drawing of a system including a base station and a number of smoke alarm units
  • Figure 4 illustrates a schematic of a smoke alarm unit according to an alternative embodiment of the invention.
  • a base station 10 includes a housing 12 and a plurality of pins 14 extending from the housing in a plug region 16 of the housing.
  • the embodiment of Figure 1 is intended to mate with a UK standard electrical power socket 18, shown dotted, in wall 20, and so the pins 14 are arranged as a standard UK power plug.
  • the pins may be arranged accordingly.
  • support is not just provided by pins 14 but by the shape of the housing in plug region 16, and accordingly the plug region 16 may be suitably shaped, for example to fit into a recessed power socket.
  • the size of the base station 10 is little bigger than a conventional plug, perhaps no more than 10cm high, 5cm thick and 5cm wide, and may preferably be a little smaller.
  • the base station 10 can be supported simply by pins 14 and plug region 16. This allows the user to locate the base station 10 in any room where required simply by inserting the base station 10 into a suitable free electrical socket.
  • the base station may thus be referred to as a "plug-in" base station.
  • the base station 10 also includes a power module 22 including a rectifier 24 for delivering a dc output voltage from that supplied from the mains on mains socket 18, and a battery back up 26.
  • the batteries may be rechargeable batteries charged by the output of rectifier 24 when the base station 10 is connected to the mains supply.
  • a microprocessor-based controller 28 provides the central control unit within the base station.
  • the base station also includes radio transceiver 30 connected to aerial 32.
  • User operable controls in the form of a test/mute button 34 and a panic button 36 are both mounted on the housing 12, as is an LED indicator light 38.
  • a sounder 40 is also provided within the housing.
  • the system address selector 42 is provided determining the system address, to avoid confusion with other installations.
  • the system address selector may be, for example, a small DIP switch with multiple switches that may be used to specify an binary address in the range 0-15.
  • a smoke alarm 50 includes a microprocessor controller 52, a transceiver 54, and aerial 56.
  • a system address selector 58 is used to select the system address of the smoke alarm.
  • the smoke alarm 50 is powered by a replaceable battery 60.
  • a smoke detector 62, test/mute button 64, sounder 66 and LED 68 complete the smoke alarm 50.
  • the test/mute button is mounted on the front face of the smoke alarm for accessibility.
  • a mounting means 51 for example a through hole for a screw, permits the smoke alarm to be mounted with its rear face against a surface, typically a ceiling.
  • a plurality of smoke alarm units 50 are mounted in various rooms with the rear face against the ceiling and the front face exposed. At least one base station 10 is provided. The address selector 42,58 of all the smoke alarms and the base station are set to the same address.
  • the microprocessors 28,52 are programmed using code included in the smoke alarm 50 and base unit 10 to carry out the following functions in use.
  • the unit detecting smoke sounds an aural "evacuate” alarm (a loud alarm) and an LED signal. It then transmits a message to other smoke alarms and the base unit of the system, which all sound an alert, a less intense sound than the "evacuate” alarm. If the test/mute control is operated on the base unit 10, all smoke alarms 50 are deactivated. If the test/mute control is operated on the smoke alarm unit that detected smoke, that unit deactivates. If no additional units detected smoke, the whole system resets.
  • test/mute control If no test/mute control is operated, then after a delay, for example of 2 minutes, all smoke alarms of the system sound the loud "evacuate" alarm. In this stage, the system can be reset by pressing the test/mute control on the base unit 10.
  • the second functionality offered by the system is the "test" functionality.
  • the test/mute control on the base station 10 is selected. This transmits a message to all smoke alarms 50, which give a quiet aural indication and LED signal except for faulty units which give a local "fault" indication, either with a louder aural tone, a different LED signal or other clear indication.
  • the user may then briefly operate the test/mute control 10 on the base station, at which time all smoke alarms 50 that were not faulty are reset, leaving only faulty units sounding.
  • the user may operate the test/mute control 10 for a longer period, at which point all smoke alarm units 50 operate the loud "evacuate” alarm, to test the full functionality of the system.
  • the test/mute control 10 is operated again which resets all non-faulty smoke alarm units 50 leaving only faulty units sounding.
  • the system has a third functionality of detecting a low battery condition.
  • the local smoke alarm unit 50 detects that its battery is running low, and gives a local aural and LED warning. A fault message is transmitted to the base unit 10 and a system fault is indicated. After the fault has been corrected, and the batteries replaced, the fault indication clears.
  • the local smoke alarm unit 50 can also detect other fault conditions and report them in the same way. For example, the microprocessor self-test may detect a fault on start up. Alternatively, the unit may determine that the detector needs cleaning. In these cases, a fault message is again transmitted to the base unit.
  • the final functionality occurs when the panic button 36 on the base unit 10 is actuated. If this is operated, all smoke alarms 50 and the base unit 10 sounds the loud "evacuate” (SOS/ Mayday) sound until the system is reset using the "test/mute” button 34 on the base unit 10.
  • the various alarm tones sounded may be those defined in international standards.
  • ISO 8201 defines a suitable "evacuate” alarm tone and ISO 7731 defines a suitable "Alert” alarm tone.
  • Messages may be sent in a format, for example using a carrier sense multiple access
  • the packets may be in the following format: a preamble (7bits); the system address value (4 bits) value 0 to 15; the message type (4 bits); and a parity bit (1 bit).
  • the message type may have the following values 1 - "panic”; 2 - “cancel panic” 3- “smoke alarm” 4- "smoke alarm mute” 5 - “fault” 6- “quiet test” 7- “loud test”.
  • the "cancel panic” and “smoke alarm mute” thus both operate as “silence” messages to prevent the sounders sounding.
  • the values 8-15 are initially undefined and allow for other messages to be transmitted if required. For example, in alternative embodiments they may allow the type of fault to be transmitted. Note that the messages are very short - a total of 16 bits in the embodiment, preferably no more than 64 bits or, even further preferably, no more than 32 bits.
  • a further benefit of the system is that the base unit 10 and smoke alarm 50 have a very similar functionality, with the panic button of the base unit replacing the smoke detector of the smoke alarm. For this reason, the system operates with more than one base unit without any change. Thus, if a user requires to be able to cancel the smoke alarm from multiple locations, the user simply installs multiple base units by plugging in base units 10 wherever required.
  • panic button may be eliminated.
  • the circuitry can be battery saving, reverting to standby mode except when signals are received.
  • the system is as described above with a number of differences, hi particular, the base station includes only a transmitter and the smoke alarms include only receivers 70 (Fig. 4) instead of transceivers 54 (Fig. 2).
  • Each base station has a build in serial number. There are a large number of possible serial numbers, preferably at least 64 000, to ensure that there is a negligible risk of two base stations with the same number. This reduces the risk of possible interference between two different base stations to a very low number.
  • the smoke alarm in this embodiment further includes a "learn" button 72 which is mounted on the rear of the smoke alarm on the opposite side from the test-mute button, so that when the smoke alarm is mounted to a ceiling the learn button is not accessible.
  • the learn button When the learn button is depressed, the smoke alarm enters a learn mode in which it listens for signals from base units 10.
  • the base unit 10 is arranged to be able to transmit a learn signal or an unlearn signal.
  • the smoke alarm can be set up to respond to only one or more preprogrammed base unit.
  • the smoke alarms are instead able to learn multiple base unit number thus allowing them to be controlled by multiple controllers.
  • the base station has separate "test” and “mute” buttons 34 36.
  • the test button 34 operates a system test and the mute button 36 mutes all units.
  • the panic alarm can only be cancelled by individually muting the smoke alarms with their own test/mute buttons.
  • the base unit 10 To allow the base unit 10 to operate the learn and unlearn mode without requiring additional buttons, the base unit is arranged to enter a learn mode and transmit a learn signal when plugged into mains power with the test button held down.
  • the base unit is arranged to enter the unlearn mode and transmit an unlearn signal when the base unit is plugged into the mains with the mute button held down.
  • a further feature is that the base unit transmits an extra digit each time it is caused to transmit a learn signal. The first time, it transmits the digit "1", the second time "2", the third time “3" and so on up to "7". The digit in the embodiment cycles again after 7, though this limit can of course be varied if required.
  • the point of the digit is to identify the sequence in which the smoke alarms are learnt.
  • the base unit transmits its serial number plus each extra digit in turn. In this way, the smoke alarms sound in the same order in which they were programmed with the base unit number, hi the embodiment, each digit sounds in turn for 5 seconds. This enables a tester to follow the smoke alarms round a building.
  • the smoke alarms are arranged to be able to receive from more than one base unit by enabling them to record more than one base station. This allows for multiple controllers.
  • the learn button is inaccessible this is in no way an essential feature and accessible learn buttons may be provided if required.

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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)
  • Computer Networks & Wireless Communication (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire Alarms (AREA)

Abstract

La présente invention concerne système avec des unités de base (10) et des détections de fumée avec alarme (50). Ces unités de base sont branchées dans des unités de base (10) qui possèdent une prise (14, 16) qui peut être branchées dans une prise électrique (18) principale classique et qui peuvent être prises en charge par celle-ci. Des messages de diffusion simples fournissent une fonctionnalité d'alarme de test, de discrétion et d'avertissement individuel.
PCT/GB2006/000563 2005-02-18 2006-02-17 Systeme de detection de fumee et d'alarme incendie commandable a distance sans fil Ceased WO2006087566A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP06709800A EP1851743A1 (fr) 2005-02-18 2006-02-17 Systeme de detection de fumee et d'alarme incendie commandable a distance sans fil
US11/884,512 US20090212961A1 (en) 2005-02-18 2006-02-17 Wireless remote controllable fire and smoke alarm system
CA002597090A CA2597090A1 (fr) 2005-02-18 2006-02-17 Systeme de detection de fumee et d'alarme incendie commandable a distance sans fil

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB0503452.5 2005-02-18
GBGB0503452.5A GB0503452D0 (en) 2005-02-18 2005-02-18 Wireless remote controllable fire and smoke alarm system
GBGB0519373.5A GB0519373D0 (en) 2005-02-18 2005-09-22 Wireless remote controllable fire and smoke alarm system
GB0519373.5 2005-09-22
GB0525247A GB2423397A (en) 2005-02-18 2005-12-12 Wireless smoke alarm system
GB0525247.3 2005-12-12

Publications (1)

Publication Number Publication Date
WO2006087566A1 true WO2006087566A1 (fr) 2006-08-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/000563 Ceased WO2006087566A1 (fr) 2005-02-18 2006-02-17 Systeme de detection de fumee et d'alarme incendie commandable a distance sans fil

Country Status (3)

Country Link
EP (1) EP1851743A1 (fr)
CA (1) CA2597090A1 (fr)
WO (1) WO2006087566A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2256708A4 (fr) * 2008-03-14 2012-04-18 Hochiki Co Système de terminaux de prévention de sinistre
EP2680244A3 (fr) * 2008-03-24 2014-05-21 Hochiki Corporation Dispositif d'alarme
GB2513733A (en) * 2013-05-01 2014-11-05 Ramtech Electronics Ltd Emergency system
WO2014202321A1 (fr) * 2013-06-21 2014-12-24 Intesa Sanpaolo Assicura S.P.A. Appareil pour détecter et indiquer des événements potentiellement nuisibles dans un environnement résidentiel
EP3040956A1 (fr) * 2014-12-29 2016-07-06 Honeywell International Inc. Annonce publique multicanal et architecture de système d'alarme vocale pour supporter des dispositifs adressables
CN117690273A (zh) * 2024-02-01 2024-03-12 领航技术股份有限公司 烟雾报警器的复位方法、装置、设备及存储介质

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0688929A2 (fr) 1994-06-21 1995-12-27 Microchip Technology Inc. Auto-apprentissage protégé
US6288639B1 (en) * 1995-08-17 2001-09-11 Pittway Corporation Low power installation of wireless security system devices
US20030052770A1 (en) * 1999-11-15 2003-03-20 Mansfield Amos R. Fire system implemented with power line communications
US6624750B1 (en) 1998-10-06 2003-09-23 Interlogix, Inc. Wireless home fire and security alarm system
WO2004070673A1 (fr) 2003-02-04 2004-08-19 Kidde Ip Holdings Limited Detection de dangers
EP1501060A1 (fr) * 2003-07-25 2005-01-26 E.I. Technology Limited Un dispositif d'alarm de fumée

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0688929A2 (fr) 1994-06-21 1995-12-27 Microchip Technology Inc. Auto-apprentissage protégé
US6288639B1 (en) * 1995-08-17 2001-09-11 Pittway Corporation Low power installation of wireless security system devices
US6624750B1 (en) 1998-10-06 2003-09-23 Interlogix, Inc. Wireless home fire and security alarm system
US20030052770A1 (en) * 1999-11-15 2003-03-20 Mansfield Amos R. Fire system implemented with power line communications
WO2004070673A1 (fr) 2003-02-04 2004-08-19 Kidde Ip Holdings Limited Detection de dangers
EP1501060A1 (fr) * 2003-07-25 2005-01-26 E.I. Technology Limited Un dispositif d'alarm de fumée

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2256708A4 (fr) * 2008-03-14 2012-04-18 Hochiki Co Système de terminaux de prévention de sinistre
EP2680244A3 (fr) * 2008-03-24 2014-05-21 Hochiki Corporation Dispositif d'alarme
GB2513733A (en) * 2013-05-01 2014-11-05 Ramtech Electronics Ltd Emergency system
GB2513733B (en) * 2013-05-01 2019-10-16 Ramtech Electronics Ltd Emergency system
WO2014202321A1 (fr) * 2013-06-21 2014-12-24 Intesa Sanpaolo Assicura S.P.A. Appareil pour détecter et indiquer des événements potentiellement nuisibles dans un environnement résidentiel
EP3040956A1 (fr) * 2014-12-29 2016-07-06 Honeywell International Inc. Annonce publique multicanal et architecture de système d'alarme vocale pour supporter des dispositifs adressables
US9704375B2 (en) 2014-12-29 2017-07-11 Honeywell International Inc. Multi-channel public announcement and voice alarm system architecture to support addressable devices, wireless expansion and intercom
CN117690273A (zh) * 2024-02-01 2024-03-12 领航技术股份有限公司 烟雾报警器的复位方法、装置、设备及存储介质

Also Published As

Publication number Publication date
CA2597090A1 (fr) 2006-08-24
EP1851743A1 (fr) 2007-11-07

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