EP0919972A2 - Système d'alarme sans fil avec transmission radiofréquence de signaux codés - Google Patents

Système d'alarme sans fil avec transmission radiofréquence de signaux codés Download PDF

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Publication number
EP0919972A2
EP0919972A2 EP98121617A EP98121617A EP0919972A2 EP 0919972 A2 EP0919972 A2 EP 0919972A2 EP 98121617 A EP98121617 A EP 98121617A EP 98121617 A EP98121617 A EP 98121617A EP 0919972 A2 EP0919972 A2 EP 0919972A2
Authority
EP
European Patent Office
Prior art keywords
case
alarm
gear
sensors
coded signals
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.)
Withdrawn
Application number
EP98121617A
Other languages
German (de)
English (en)
Other versions
EP0919972A3 (fr
Inventor
Giuseppe Simonazzi
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.)
Meta System SpA
Original Assignee
Meta System SpA
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 Meta System SpA filed Critical Meta System SpA
Publication of EP0919972A2 publication Critical patent/EP0919972A2/fr
Publication of EP0919972A3 publication Critical patent/EP0919972A3/fr
Withdrawn legal-status Critical Current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
    • G08B25/01—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

Definitions

  • the present invention relates to a wireless signal/alarm system with radiofrequency transmission of coded signals, whose sensors of possible intrusion, always switched on, sent their stimulations by means of coded radiofrequency to a monitored alarm gear-case designed to operate in two different conditions, namely with the alarm switched on or off.
  • the gear-case In switched on conditions, the gear-case operates in a substantially conventional manner, causing the intervention of acoustic/and or light alarm signals; in off conditions, the same gear-case emits a discreet acoustic and/or light signal suitable to signal only the presence of movement in the protected environment.
  • the alarm gear-case of the additional device may be sectionalised, so as to switch them on only following signals received from predetermined sensors and not from all those present in the alarm system.
  • sensors which are always switched on as the gear-case, being not directly connected to them, cannot switch them on or off. This means that, independently on the state of the gear-case, sensors send by radio their coded messages whenever they sense an event similar to an intrusion.
  • a magnetic sensor installed above a door sends to its gear-case an alarm signal each time the door is opened, independently on the gear-case being switched on or off.
  • Object of this invention is to utilise the always present signals emitted by said sensors and sent by radio to the gear case, to obtain not only an alarm indication when the gear-box is on, but also to obtain an event signal, without the necessity of switching on the alarm, in case of a switched off gear-case.
  • the invention intends in fact to point out any event, such as for instance: door openings, movement in the inside of rooms, and so on, utilising radiofrequency signals emitted by the always switched on sensors which are usually utilised only to cause the intervention of the alarm signal.
  • the alarm gear-case provided with a dedicated circuit which, even in switched off conditions, emits a discreet acoustic and/or light signal each time it receives a discreet acoustic or light signal from the remote sensors.
  • the same aim is obtained by using a dedicated control circuit, independent on the gear-case, possibly positioned also in another environment, able to discreetly signal the messages coming from the remote sensors.
  • a dedicated control circuit independent on the gear-case, possibly positioned also in another environment, able to discreetly signal the messages coming from the remote sensors.
  • the figure shows a wireless signal/alarm system with radiofrequency transmission of the coded signal installed in a shop (a) with back-shop (b).
  • the system is composed by an alarm gear-case (1), a volumetric sensor (2), a magnetic sensor (3), applied in the inside of a shop (a), and a siren (4) applied on the outside.
  • An additional control device (5) is located in the back-shop (b).
  • the control system (5) is so designed as to sense and signal both the codes received by the magnetic sensor (3), installed on the entry door (c) of the shop, and those coming from the volumetric sensor (2).
  • sensors (2, 3) remain on and transmit their radiofrequency signals: the magnetic one (c) in case of door opening, the volumetric one in the presence of movement in the inside of the protected room (a).
  • control device (5) When the shop-keeper has to pass to the back-shop (b), the control device (5) provides to signal, at any moment, the possible arrival of a new customer which enters the shop, opening the door and causing the intervention of sensor (3).
  • the alarm When, instead, the alarm is switched on, it is the gear-case (1) that, receiving the stimulations from the same sensors, signals the intrusion by causing the alarm to switch on and activate the siren (4).
  • control system (5) may also be sectionalised in such a way as to signal, for instance, only the opening of the door (c), receiving the signals emitted by the magnetic sensor (3) and ignoring the movement of other possible persons already present in the inside of the shop (a).
  • control device (5) may be incorporated, should one so wish, in the inside of the gear-case (1). So, as an alternative, also the number and type of sensors utilised may be any whatever.
  • the basic principle of the invention is that of utilising parts of a conventional alarm system, comprising remote sensors which send their findings to an alarm gear-case, through radiofrequency coded signals, to realise a function of environmental control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Transmitters (AREA)
EP98121617A 1997-11-26 1998-11-12 Système d'alarme sans fil avec transmission radiofréquence de signaux codés Withdrawn EP0919972A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE970058 1997-08-01
ITRE970058 IT238433Y1 (it) 1997-11-26 1997-11-26 Impianto senza fili di segnalazione/allarme, con trasmissione deisegnali codificati a radiofrequenza

Publications (2)

Publication Number Publication Date
EP0919972A2 true EP0919972A2 (fr) 1999-06-02
EP0919972A3 EP0919972A3 (fr) 1999-12-01

Family

ID=11399093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121617A Withdrawn EP0919972A3 (fr) 1997-11-26 1998-11-12 Système d'alarme sans fil avec transmission radiofréquence de signaux codés

Country Status (2)

Country Link
EP (1) EP0919972A3 (fr)
IT (1) IT238433Y1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4581606A (en) * 1982-08-30 1986-04-08 Isotec Industries Limited Central monitor for home security system
US5004999A (en) * 1989-12-21 1991-04-02 Honeywell, Inc. Extended RF range alarm system
FR2691274A1 (fr) * 1992-05-13 1993-11-19 Seb Sa Capteur, centre de surveillance et réseau domotique de surveillance.
US5543778A (en) * 1993-04-19 1996-08-06 Code-Alarm, Inc. Security system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4581606A (en) * 1982-08-30 1986-04-08 Isotec Industries Limited Central monitor for home security system
US5004999A (en) * 1989-12-21 1991-04-02 Honeywell, Inc. Extended RF range alarm system
FR2691274A1 (fr) * 1992-05-13 1993-11-19 Seb Sa Capteur, centre de surveillance et réseau domotique de surveillance.
US5543778A (en) * 1993-04-19 1996-08-06 Code-Alarm, Inc. Security system

Also Published As

Publication number Publication date
EP0919972A3 (fr) 1999-12-01
ITRE970058V0 (it) 1997-11-26
ITRE970058U1 (it) 1999-05-26
IT238433Y1 (it) 2000-11-13

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