EP0306692A1 - Working method and room monitoring arrangement - Google Patents

Working method and room monitoring arrangement Download PDF

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Publication number
EP0306692A1
EP0306692A1 EP88112226A EP88112226A EP0306692A1 EP 0306692 A1 EP0306692 A1 EP 0306692A1 EP 88112226 A EP88112226 A EP 88112226A EP 88112226 A EP88112226 A EP 88112226A EP 0306692 A1 EP0306692 A1 EP 0306692A1
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circuit
intrusion
alarm
signal
signals
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EP88112226A
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German (de)
French (fr)
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EP0306692B1 (en
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Gilles Morey
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    • 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

Definitions

  • the present invention relates to a method of operating an installation for monitoring a property, premises and possibly their environment and in general all other sites or areas, whether built or not.
  • the surveillance installations for properties such as dwellings are generally adapted to, in the event of intrusion, activate a siren installed on the premises.
  • a first siren is generally provided inside the room and a second siren outside the room.
  • the monitoring facilities are adapted to, in the event of an intrusion, transmit alarm signals outside the monitored property, in particular via telephone circuits.
  • the alarm signals transmitted by telephone link are intended for telesurveillance agencies which are in charge of the remote monitoring of several sites or premises.
  • the agency receives an alarm signal from a monitored room, it checks the validity of the alarm and, in the positive case or in case of doubt, its role is to cause the intervention.
  • Certain installations include an alarm circuit which supplies an alarm signal that after reception of two successive intrusion signals, within a determined period of time, coming from one or two different detection circuits, these circuits detection possibly being coded.
  • This solution is not very secure and does not prevent false alarms. Indeed, faulty detection circuits can very well transmit successive signals, without intrusion, as a result of which the alarm circuit generates an alarm signal.
  • the intrusion signals emanating from the detection circuits overload the transmission network and can lead to its saturation so that a real intrusion could not be detected and then confirmed.
  • Such installations are described in GB-A-1,592,773 and FR-A-2,575,571.
  • Another solution proposed consists in resolving a doubt by listening by installing different microphones distributed in the room to be monitored. An intrusion signal is then confirmed by a signal from one of the microphones but only in the event of suspicious noises.
  • a solution is also proposed which consists in placing in the room to be monitored different video cameras associated with image analyzers. In the event of an intrusion, the image analyzer detects variations in images taken by video cameras, alerts the image reception center which, by visualization, can confirm the intrusion.
  • the latter two solutions have the drawback of requiring additional devices whose hardware and installation costs are high.
  • the object of the present invention is to remedy in particular the abovementioned drawbacks and proposes a method of operating a monitoring installation making it possible, in a simple way, to limit false alarms, to reduce nuisances and to provide alarm signals correlated to the severity of the intrusion.
  • the operating method of a facility for monitoring a room with a view to providing alarm signals in the event of an intrusion comprises at least one group of detection circuits adapted to supply, when occurs detection, intrusion signals to an alarm circuit, in which the alarm circuit provides an alarm signal after successive reception of at least two intrusion signals separated by at most a delay (t) determined.
  • any new signal of intrusion which could be provided by this same detection circuit for a period which corresponds to the abovementioned period (t), is inhibited or blocked.
  • the method according to the present invention as set out above makes it possible to provide an alarm signal resulting from a confirmed intrusion, by using the intrusion detection circuits themselves and without it being necessary to individualize each detection circuit by a particular code to be recognized by the alarm circuit, two successive intrusion signals during the aforementioned delay necessarily coming from two different detection circuits.
  • These advantages are considerable, in particular when the intrusion signals pass through a single exchange channel.
  • certain detection circuits of the detection group or of the detection circuits outside this group can nevertheless be personalized or codified in a particular way with a view to being recognized by the alarm circuit, in order to provide specific instructions which can also be alarm signals.
  • the method according to the present invention is such that on reception of a first intrusion signal, the alarm circuit generates a first alarm signal and on reception of a second signal intrusion during the aforementioned delay, the alarm circuit generates a second alarm signal differentiated from said first alarm signal.
  • the first alarm signal and the second alarm signal respectively for specific purposes, possibly hierarchical.
  • the intrusion signals from at least some of said detection circuits are preferably transmitted by radio to an alarm circuit generating the alarm signals, their transmitter circuit being inhibited during the aforementioned delay .
  • the intrusion signals from at least some of said detection circuits (2a ... 2n) can be transmitted to the alarm circuit on at least one single exchange channel, in particular of the radioelectric type, wired or opto bus electronic, by carrier superimposed on the electrical network, or by infrared or other transmission.
  • the present invention also relates to an installation for monitoring a room with a view to providing alarm signals ( B ) in the event of an intrusion, which comprises at least one group of detection circuits suitable for supplying, when occurs a detection, intrusion signals to an alarm circuit, this alarm circuit comprising means for supplying an alarm signal (B) after successive reception of at least two intrusion signals separated by at most a specified period (t).
  • each detection circuit comprises means for momentarily inhibiting or blocking, after it has supplied an intrusion signal, any new intrusion signal which could be supplied by this detection circuit for a period which corresponds at the aforementioned time limit (t).
  • each detection circuit comprises a detector, a transmission circuit, this detection circuit further comprising a momentary inhibition means inhibiting or blocking its detector and / or its transmission circuit during the aforementioned delay (t ) after receiving an intrusion signal from the transmitting circuit.
  • each detection circuit comprises a circuit for transmitting radio intrusion signals and the alarm circuit comprises a circuit for receiving these intrusion signals.
  • the present invention will be better understood from the study of a monitoring installation in particular of a room and possibly of its environment with a view to providing alarm signals in the event of an intrusion, described by way of nonlimiting example and illustrated by the single figure attached.
  • the installation for monitoring a room shown in the figure and generally identified by the reference 1 comprises on the one hand a group of intrusion detection circuits generally identified by the references 2a, 2b, ... 2n and on the other hand an alarm circuit generally identified by the reference 3, the intrusion detection circuits 2a to 2n being connected, in the example, by radio to the circuit alarm 3.
  • the intrusion detection circuits 2a to 2n respectively comprise an intrusion detector 4 adapted to supply, in the event of an intrusion, a detection signal to a transmitter circuit 5 of radio waves, the output of which is connected to a transmitting antenna 6.
  • the intrusion detectors 4 can be of different types.
  • the intrusion detectors 4 can be peripheral detectors such as linear beam barriers, approach radars, seismic detectors, contact mats, perimeter detectors such as infrasonic detectors or constituted for example by the switches associated with the elements opening the room, vibration detectors, volumetric detectors, for example of presence or movement, heat detectors or any other detectors adapted to provide a signal; in the event of an approach, intrusion, presence, movement, or destruction, or surveillance of a physical quantity.
  • Each of the intrusion detection circuits 2a to 2n operates in the following manner.
  • the intrusion detector 4 When the intrusion detector 4 is activated, it supplies a signal to the transmission circuit 5 which transmits, via the antenna 6, an intrusion signal for a limited period, this intrusion signal being identical for all the detection circuits but which may constitute part of a message containing other information, in particular if detectors outside the premises are used.
  • the latter transmits a signal to a momentary inhibition circuit 7 which comes to block the transmission circuit 5 for a determined period t identical for all the detection circuits of said group, for example from a few seconds to a few minutes, so that, during this time t , any signal capable of being supplied by the intrusion detector 4 to the transmission circuit 5 is inhibited, the antenna 6 being unable to emit any intrusion signal during this time t .
  • the momentary inhibition circuit 7 unlocks the transmission circuit 5 and any new first signal supplied by the intrusion detector 4 is transmitted by the antenna 6.
  • the alarm circuit 3 comprises a radio reception circuit 8 connected to a receiving antenna 9.
  • the output of the reception circuit 8 is connected on the one hand to the input A of an alarm signal management circuit 10 and on the other hand at the input of a counting circuit by two 11 whose output is connected to an input B of the management circuit 10.
  • This reception circuit 8 is moreover at the input of a reset 12 connected to the reset input of the counting circuit 11 and resetting this counting circuit after a time at most equal to the inhibition delay t common to each of the detection circuits intrusion from 2a to 2n.
  • the alarm circuit 3 operates as follows. On receipt of an intrusion signal from any of the intrusion detection circuits 2a to 2n, the reception circuit 8 provides a signal of limited duration. This signal constitutes a first alarm signal which is supplied to the alarm signal management circuit 10. The output signal from the reception circuit 8 increments the counting circuit by one step and triggers the reset circuit. timed 12.
  • the reception circuit 8 If at the end of the delay time of the reset circuit 12 the reception circuit 8 has not received any other signal from the intrusion detection circuits 2a to 2n, no other signal appears on its output and the reset circuit 12 resets counting circuit 12 to zero.
  • the reception circuit 8 receives a signal from any of the intrusion detection circuits 2a to 2n, with the exception of a intrusion signal of the intrusion detection circuit having supplied the first intrusion signal since it is momentarily inhibited or blocked, the reception circuit a provides by its output a new signal at the input A of the management circuit of alarm signal 10 and, in addition, increments the counting circuit 11 by a second step, which therefore supplies a signal to input B of the alarm signal management circuit 10. As before, at the end of the delay time of the reset circuit 12, the latter resets the counting circuit 11 to zero.
  • the alarm circuit 10 could include other circuits for the interpretation of the complete messages transmitted by the detection circuits 2a to 2n or messages making it possible to process the intrusion detectors by group.
  • the alarm signal management circuit 10 has, in the example, outputs which are respectively connected to a first siren 13 installed in the room or in the property to be monitored, to a second siren 14 installed outside the room to be monitored, to a first telephone transmitter 15 and a long-range radio transmitter 16.
  • the latter activates the internal siren 13 and the telephone transmitter 15 which transmits simple intrusion information by telephone to a place outside the room, for example to a neighbor of the room or to another dwelling of the owner of this room.
  • this circuit 10 When the input B of the alarm signal management circuit 10 is activated, which corresponds as we have seen previously to a confirmation of the intrusion, this circuit 10 activates the outdoor siren 14, the long-range radio transmitter 16 and again the telephone transmitter 15, the latter allowing the transmission by telephone and radio of a signal for example to a remote monitoring agency which may, on the basis of a confirmed intrusion signal, dispatch intervention personnel to the premises monitored by the monitoring installation 1.
  • a remote monitoring agency which may, on the basis of a confirmed intrusion signal, dispatch intervention personnel to the premises monitored by the monitoring installation 1.
  • any other combination of alarm modes can be envisaged.
  • the radio transmission using the transmission circuit 5 and the reception circuit 8 can be replaced by a wired link or by a bus circuit, common to the detectors 2a to 2n.
  • the transmission circuit 5 would be replaced by a signal supply circuit corresponding to the output signal of the reception circuit 8, this signal supply circuit also being capable of being inhibited using a momentary inhibition circuit equivalent to inhibition circuit 7.
  • the inhibition circuit 7 could act on the detector 4 instead of acting on the emission circuit 5, or could act on both at the same time.
  • other groups equivalent to the group of detection circuits 2a to 2n could be associated with the alarm circuit 3.

Abstract

Method of working and arrangement for monitoring (1) a room with a view to delivering alarm signals (B) in the event of an intrusion, comprising at least one group of detection circuits (2a...2n) adapted to deliver, when a detection occurs, intrusion signals to an alarm circuit (3), the latter being adapted to deliver alarm signals. The alarm circuit (3) delivers an alarm signal (B) after successive receptions of at least two intrusion signals separated by at most a specified delay (t). After an intrusion signal is delivered to the alarm circuit by any one of the detection circuits, any new intrusion signal which might be delivered by this detection circuit during the abovementioned delay (t) is inhibited or blocked. <IMAGE>

Description

La présente invention concerne un procédé de fonction­nement d'une installation de surveillance d'une propriété, de locaux et éventuellement de leur environnement et d'une manière générale de tous autres sites ou zones, bâtis ou non.The present invention relates to a method of operating an installation for monitoring a property, premises and possibly their environment and in general all other sites or areas, whether built or not.

Les installations de surveillance de propriétés telles que des habitations sont en général adaptées pour, en cas d'intru­sion, mettre en route une sirène installée sur les lieux. On prévoit en général une première sirène à l'intérieur du local et une deuxième sirène à l'extérieur du local.The surveillance installations for properties such as dwellings are generally adapted to, in the event of intrusion, activate a siren installed on the premises. A first siren is generally provided inside the room and a second siren outside the room.

De plus en plus maintenant, les installations de surveillance sont adaptées pour, en cas d'intrusion, transmettre des signaux d'alarme à l'extérieur de la propriété surveillé notam­ment par l'intermédiaire des circuits téléphoniques. Dans certains cas de plus en plus fréquents, les signaux d'alarme transmis par liaison téléphonique sont destinés à des agences de télésurveillance qui ont en charge la surveillance à distance de plusieurs sites ou locaux. Lorsque l'agence reçoit un signal d'alarme en provenance d'un local surveillé, elle vérifie la validité de l'alarme et dans le cas positif ou en cas de doute, elle a pour rôle de provoquer l'intervention.Increasingly now, the monitoring facilities are adapted to, in the event of an intrusion, transmit alarm signals outside the monitored property, in particular via telephone circuits. In some more and more frequent cases, the alarm signals transmitted by telephone link are intended for telesurveillance agencies which are in charge of the remote monitoring of several sites or premises. When the agency receives an alarm signal from a monitored room, it checks the validity of the alarm and, in the positive case or in case of doubt, its role is to cause the intervention.

Notamment dans les cas de mise en route de la sirène extérieure de forte puissance ou de transmission de signaux d'alarme par voie téléphonique en particulier vers les agences de télésurveil­lance, les fausses alarmes posent des problèmes en particulier, dans le premier cas, de nuisances pour le voisinage et, dans le second cas, de déplacements inutiles engageant des frais inutiles.In particular in the case of switching on the high-power outdoor siren or the transmission of alarm signals by telephone, in particular to remote monitoring agencies, false alarms pose problems in particular, in the first case, nuisance for the neighborhood and, in the second case, for unnecessary trips incurring unnecessary costs.

Pour répondre à ces problèmes de fausses alarmes, on propose actuellement différentes solutions.To address these problems of false alarms, various solutions are currently proposed.

Certaines installations comprennent un circuit d'alarme qui fournit un signal d'alarme qu'après réception de deux signaux d'intrusion successifs, dans un laps de temps déterminé, en prove­nance d'un ou de deux circuits de détection différents, ces circuits de détection étant éventuellement codés. Cette solution n'est pas d'une grande sécurité et n'empêche pas les fausses alarmes. En effet, des circuits de détection défaillants peuvent très bien transmettre des signaux successifs, sans qu'il y ait intrusion, à la suite desquels le circuit d'alarme génère un signal d'alarme. De plus, les signaux d'intrusion émanant des circuits de détection surchargent le réseau de transmission et peuvent conduire à sa saturation de telle sorte qu'une véritable intrusion ne pourrait pas être détectée puis confirmée. De telles installations sont décrites dans les brevets GB-A-1 592 773 et FR-A-2 575 571.Certain installations include an alarm circuit which supplies an alarm signal that after reception of two successive intrusion signals, within a determined period of time, coming from one or two different detection circuits, these circuits detection possibly being coded. This solution is not very secure and does not prevent false alarms. Indeed, faulty detection circuits can very well transmit successive signals, without intrusion, as a result of which the alarm circuit generates an alarm signal. In addition, the intrusion signals emanating from the detection circuits overload the transmission network and can lead to its saturation so that a real intrusion could not be detected and then confirmed. Such installations are described in GB-A-1,592,773 and FR-A-2,575,571.

Une autre solution proposée consiste à procéder à un lever de doute par écoute en installant différents microphones répartis dans le local à surveiller. Un signal d'intrusion se trouve alors confirmé par un signal provenant de l'un des microphones mais uniquement en cas de bruits suspects. On propose également une solution qui consiste à placer dans le local à surveiller différentes caméras vidéo associées à des analyseurs d'images. En cas d'intrusion, l'analyseur d'images détecte les variations d'images prises par les caméras vidéo, alerte le centre de réception des images qui par visualisation peut confirmer l'intrusion. Ces deux dernières solutions présentent cependant l'inconvénient de nécessiter des appareils complémentaires dont les coûts de matériel et d'installation sont élevés.Another solution proposed consists in resolving a doubt by listening by installing different microphones distributed in the room to be monitored. An intrusion signal is then confirmed by a signal from one of the microphones but only in the event of suspicious noises. A solution is also proposed which consists in placing in the room to be monitored different video cameras associated with image analyzers. In the event of an intrusion, the image analyzer detects variations in images taken by video cameras, alerts the image reception center which, by visualization, can confirm the intrusion. The latter two solutions, however, have the drawback of requiring additional devices whose hardware and installation costs are high.

La présente invention a pour but de remédier notamment aux inconvénients susvisés et propose un procédé de fonctionnement d'une installation de surveillance permettant de façon simple de limiter les fausses alarmes, d'en réduire les nuisances et de fournier des signaux d'alarme corrélés à la gravité de l'intrusion.The object of the present invention is to remedy in particular the abovementioned drawbacks and proposes a method of operating a monitoring installation making it possible, in a simple way, to limit false alarms, to reduce nuisances and to provide alarm signals correlated to the severity of the intrusion.

Le procédé de fonctionnement d'une installation de surveillance d'un local en vue de fournir des signaux d'alarme en cas d'intrusion, selon l'invention, comprend au moins un groupe de circuits de détection adaptés pour fournir, quand se produit une détection, des signaux d'intrusion à un circuit d'alarme, dans lequel le circuit d'alarme fournit un signal d'alarme après réceptions successives d'au moins deux signaux d'intrusion séparés d'au plus un délai (t) déterminé.The operating method of a facility for monitoring a room with a view to providing alarm signals in the event of an intrusion, according to the invention, comprises at least one group of detection circuits adapted to supply, when occurs detection, intrusion signals to an alarm circuit, in which the alarm circuit provides an alarm signal after successive reception of at least two intrusion signals separated by at most a delay (t) determined.

Conformément à la présente invention, à la suite de la fourniture d'un signal d'intrusion par l'un quelconque des circuits de détection au circuit d'alarme, tout nouveau signal d'intrusion, qui pourrait être fourni par ce même circuit de détection pendant un délai qui correspond au délai précité (t), est inhibé ou bloqué.According to the present invention, following the supply of an intrusion signal by any of the detection circuits to the alarm circuit, any new signal of intrusion, which could be provided by this same detection circuit for a period which corresponds to the abovementioned period (t), is inhibited or blocked.

Le procédé selon la présente invention telle qu'exposée ci-dessus permet de fournir un signal d'alarme résultant d'une intru­sion confirmée, en utilisant les circuits de détection d'intrusion eux-mêmes et sans qu'il soit nécessaire d'individualiser chaque circuit de détection par un code particulier devant être reconnu par le circuit d'alarme, deux signaux successifs d'intrusion pendant le délai précité provenant nécessairement de deux circuits de détection différents. Ces avantages sont considérables notamment lorque les signaux d'intrusion transitent par un canal d'échange unique. Bien entendu, certains circuits de détection du groupe de détection ou des circuits de détection extérieurs à ce groupe peuvent néanmoins être personnalisés ou codifiés de manière parti­culière en vue d'être reconnus par le circuit d'alarme, afin de fournir des instructions particulières qui peuvent être également des signaux d'alarme.The method according to the present invention as set out above makes it possible to provide an alarm signal resulting from a confirmed intrusion, by using the intrusion detection circuits themselves and without it being necessary to individualize each detection circuit by a particular code to be recognized by the alarm circuit, two successive intrusion signals during the aforementioned delay necessarily coming from two different detection circuits. These advantages are considerable, in particular when the intrusion signals pass through a single exchange channel. Of course, certain detection circuits of the detection group or of the detection circuits outside this group can nevertheless be personalized or codified in a particular way with a view to being recognized by the alarm circuit, in order to provide specific instructions which can also be alarm signals.

Dans une variante possible, le procédé selon la présente invention est tel qu'à la réception d'un premier signal d'intrusion, le circuit d'alarme génère un premier signal d'alarme et à la réception d'un second signal d'intrusion pendant le délai précité, le circuit d'alarme génère un second signal d'alarme différencié par rapport audit premier signal d'alarme. Ainsi, il est possible d'utiliser le premier signal d'alarme et le second signal d'alarme respectivement à des fins particulières, éventuellement hiérar­chisées.In a possible variant, the method according to the present invention is such that on reception of a first intrusion signal, the alarm circuit generates a first alarm signal and on reception of a second signal intrusion during the aforementioned delay, the alarm circuit generates a second alarm signal differentiated from said first alarm signal. Thus, it is possible to use the first alarm signal and the second alarm signal respectively for specific purposes, possibly hierarchical.

Dans une variante de réalisation particulière, les signaux d'intrusion d'au moins certains desdits circuits de détection sont de préférence transmis par voie radioélectrique à un circuit d'alarme générant les signaux d'alarme, leur circuit émetteur étant inhibé pendant le délai précité.In a particular variant embodiment, the intrusion signals from at least some of said detection circuits are preferably transmitted by radio to an alarm circuit generating the alarm signals, their transmitter circuit being inhibited during the aforementioned delay .

Dans d'autres variantes, les signaux d'intrusion d'au moins certains desdits circuits de détection (2a...2n) peuvent être transmis au circuit d'alarme sur au moins un canal d'échange unique, notamment du type radioélectrique, bus filaire ou opto­ électronique, par porteuse superposée au réseau électrique, ou par transmission infrarouge ou autre.In other variants, the intrusion signals from at least some of said detection circuits (2a ... 2n) can be transmitted to the alarm circuit on at least one single exchange channel, in particular of the radioelectric type, wired or opto bus electronic, by carrier superimposed on the electrical network, or by infrared or other transmission.

La présente invention a également pour objet une instal­lation de surveillance d'un local en vue de fournir des signaux d'alarme (B) en cas d'intrusion, qui comprend au moins un groupe de circuits de détection adaptés pour fournir, quand se produit une détection, des signaux d'intrusion à un circuit d'alarme, ce circuit d'alarme comprenant des moyens pour fournir un signal d'alarme (B) après réceptions successives d'au moins deux signaux d'intrusion séparés d'au plus un délai (t) déterminé.The present invention also relates to an installation for monitoring a room with a view to providing alarm signals ( B ) in the event of an intrusion, which comprises at least one group of detection circuits suitable for supplying, when occurs a detection, intrusion signals to an alarm circuit, this alarm circuit comprising means for supplying an alarm signal (B) after successive reception of at least two intrusion signals separated by at most a specified period (t).

Selon l'invention, chaque circuit de détection comprend des moyens pour momentanément inhiber ou bloquer, après qu'il ait fourni un signal d'intrusion, tout nouveau signal d'intrusion qui pourrait être fourni par ce circuit de détection pendant un délai qui correspond au délai précité (t) .According to the invention, each detection circuit comprises means for momentarily inhibiting or blocking, after it has supplied an intrusion signal, any new intrusion signal which could be supplied by this detection circuit for a period which corresponds at the aforementioned time limit (t).

Dans une variante, chaque circuit de détection comprend un détecteur, un circuit d'émission, ce circuit de détection compre­nant en outre un moyen d'inhibition momentané inhibant ou bloquant son détecteur et/ou son circuit d'émission pendant le délai précité (t) après réception d'un signal d'intrusion du circuit d'émission.In a variant, each detection circuit comprises a detector, a transmission circuit, this detection circuit further comprising a momentary inhibition means inhibiting or blocking its detector and / or its transmission circuit during the aforementioned delay (t ) after receiving an intrusion signal from the transmitting circuit.

Dans une réalisation préférée, chaque circuit de détection comprend un circuit d'émission de signaux radioélectriques d'intrusion et que le circuit d'alarme comprend un circuit de réception de ces signaux d'intrusion.In a preferred embodiment, each detection circuit comprises a circuit for transmitting radio intrusion signals and the alarm circuit comprises a circuit for receiving these intrusion signals.

La présente invention sera mieux comprise à l'étude d'une installation de surveillance en particulier d'un local et éventuellement de son environnement en vue de fournir des signaux d'alarme en cas d'intrusion, décrite à titre d'exemple non limitatif et illustrée par la figure unique annexée.The present invention will be better understood from the study of a monitoring installation in particular of a room and possibly of its environment with a view to providing alarm signals in the event of an intrusion, described by way of nonlimiting example and illustrated by the single figure attached.

L'installation de surveillance d'un local représentée sur la figure et repérée d'une manière générale par la référence 1 comprend d'une part un groupe de circuits de détection d'intrusion repérés d'une manière générale respectivement par les références 2a, 2b, ... 2n et d'autre part un circuit d'alarme repéré d'une manière générale par la référence 3, les circuits de détection d'intrusion 2a à 2n étant reliés, dans l'exemple, par voie radio­électrique au circuit d'alarme 3.The installation for monitoring a room shown in the figure and generally identified by the reference 1 comprises on the one hand a group of intrusion detection circuits generally identified by the references 2a, 2b, ... 2n and on the other hand an alarm circuit generally identified by the reference 3, the intrusion detection circuits 2a to 2n being connected, in the example, by radio to the circuit alarm 3.

Les circuits de détection d'intrusion 2a à 2n compren­nent respectivement un détecteur d'intrusion 4 adapté pour fournir, en cas d'intrusion, un signal de détection à un circuit émetteur 5 d'ondes radioélectriques dont la sortie est branchée sur une antenne émettrice 6.The intrusion detection circuits 2a to 2n respectively comprise an intrusion detector 4 adapted to supply, in the event of an intrusion, a detection signal to a transmitter circuit 5 of radio waves, the output of which is connected to a transmitting antenna 6.

Les détecteurs d'intrusion 4 peuvent être de différents types. En particulier, les détecteurs d'intrusion 4 peuvent être des détecteurs périphériques tels que barrières à faisceaux linéaires, radars d'approche, détecteurs sismiques, tapis contacts, des détec­teurs périmétriques tels que des détecteurs infrasoniques ou constitués par exemple par les interrupteurs associés aux éléments ouvrant du local, des détecteurs de vibration, des détecteurs volumé­triques par exemple de présence ou de mouvement, des détecteurs de chaleur ou tous autres détecteurs adaptés pour fournir un signa; en cas d'approche, d'intrusion, de présence, de mouvement, ou de destruction, ou de surveillance d'une grandeur physique.The intrusion detectors 4 can be of different types. In particular, the intrusion detectors 4 can be peripheral detectors such as linear beam barriers, approach radars, seismic detectors, contact mats, perimeter detectors such as infrasonic detectors or constituted for example by the switches associated with the elements opening the room, vibration detectors, volumetric detectors, for example of presence or movement, heat detectors or any other detectors adapted to provide a signal; in the event of an approach, intrusion, presence, movement, or destruction, or surveillance of a physical quantity.

Chacun des circuits de détection d'intrusion 2a à 2n fonctionne de la manière suivante. Lorsque le détecteur d'intru­sion 4 est activé, il fournit un signal au circuit d'émission 5 qui émet par l'intermédiaire de l'antenne 6 un signal d'intrusion pendant une durée limitée, ce signal d'intrusion étant identique pour tous les circuits de détection mais pouvant constituer une partie d'un message contenant d'autres informations, en particulier si des détecteurs extérieurs au local sont utilisés. A la fin de l'émission du signal d'intrusion ou du message complet par le circuit d'émission 5, ce dernier transmet un signal à un circuit d'inhibition momentanée 7 qui vient bloquer le circuit d'émission 5 pendant un délai déterminé t identique pour tous les circuits de détection dudit groupe par exemple de quelques secondes à quelques minutes, de telle sorte que, pendant ce délai t, tout signal succeptible d'être fourni par le détecteur d'intrusion 4 au circuit d'émission 5 est inhibé, l'antenne 6 ne pouvant émettre aucun signal d'intrusion pendant ce délai t. Bien entendu, au bout du temps t, le circuit d'inhibition momentanée 7 débloque le circuit d'émission 5 et tout nouveau premier signal fourni par le détecteur d'intrusion 4 est transmis par l'antenne 6.Each of the intrusion detection circuits 2a to 2n operates in the following manner. When the intrusion detector 4 is activated, it supplies a signal to the transmission circuit 5 which transmits, via the antenna 6, an intrusion signal for a limited period, this intrusion signal being identical for all the detection circuits but which may constitute part of a message containing other information, in particular if detectors outside the premises are used. At the end of the transmission of the intrusion signal or of the complete message by the transmission circuit 5, the latter transmits a signal to a momentary inhibition circuit 7 which comes to block the transmission circuit 5 for a determined period t identical for all the detection circuits of said group, for example from a few seconds to a few minutes, so that, during this time t , any signal capable of being supplied by the intrusion detector 4 to the transmission circuit 5 is inhibited, the antenna 6 being unable to emit any intrusion signal during this time t . Of course, at the end of time t , the momentary inhibition circuit 7 unlocks the transmission circuit 5 and any new first signal supplied by the intrusion detector 4 is transmitted by the antenna 6.

Le circuit d'alarme 3 comprend un circuit de réception radioélectrique 8 relié à une antenne réceptrice 9. La sortie du circuit de réception 8 est reliée d'une part à l'entrée A d'un circuit de gestion de signal d'alarme 10 et d'autre part à l'entrée d'un circuit de comptage par deux 11 dont la sortie est reliée à une entrée B du circuit de gestion 10. Ce circuit de réception 8 est par ailleurs à l'entrée d'un circuit de remise à zero 12 relié à l'entrée de remise à zéro du circuit de comptage 11 et remettant à zéro ce circuit de comptage au bout d'un temps au plus égal au délai d'inhibition t commun à chacun des circuits de détection d'intrusion de 2a à 2n.The alarm circuit 3 comprises a radio reception circuit 8 connected to a receiving antenna 9. The output of the reception circuit 8 is connected on the one hand to the input A of an alarm signal management circuit 10 and on the other hand at the input of a counting circuit by two 11 whose output is connected to an input B of the management circuit 10. This reception circuit 8 is moreover at the input of a reset 12 connected to the reset input of the counting circuit 11 and resetting this counting circuit after a time at most equal to the inhibition delay t common to each of the detection circuits intrusion from 2a to 2n.

Le circuit d'alarme 3 fonctionne de la manière suivante. A la réception d'un signal d'intrusion provenant de l'un quelconque des circuits de détection d'intrusion de 2a à 2n, le circuit de réception 8 fournit un signal de durée limitée. Ce signal constitue un premier signal d'alarme qui est fourni au circuit de gestion de signal d'alarme 10. Le signal de sortie du circuit de réception 8 incrémente d'un pas le circuit de comptage 11 et déclenche le circuit de remise à zéro temporisé 12.The alarm circuit 3 operates as follows. On receipt of an intrusion signal from any of the intrusion detection circuits 2a to 2n, the reception circuit 8 provides a signal of limited duration. This signal constitutes a first alarm signal which is supplied to the alarm signal management circuit 10. The output signal from the reception circuit 8 increments the counting circuit by one step and triggers the reset circuit. timed 12.

Si au bout du temps de temporisation du circuit de remise à zéro 12 le circuit de réception 8 n'a reçu aucun autre signal en provenance des circuits de détection d'intrusion 2a à 2n, aucun autre signal n'apparaît sur sa sortie et le circuit de remise à zéro 12 remet à zéro le circuit de comptage 12.If at the end of the delay time of the reset circuit 12 the reception circuit 8 has not received any other signal from the intrusion detection circuits 2a to 2n, no other signal appears on its output and the reset circuit 12 resets counting circuit 12 to zero.

Si au contraire, pendant le délai de temporisation du circuit de remise à zéro 12, le circuit de réception 8 reçoit un signal en provenance de l'un quelconque des circuits de détection d'intrusion 2a à 2n, à l'exception d'un signal d'intrusion du circuit de détection d'intrusion ayant fourni le premier signal d'intrusion puisqu'il est momentanément inhibé ou bloqué, le circuit de réception a fournit par sa sortie un nouveau signal à l'entrée A du circuit de gestion de signal d'alarme 10 et, de plus, incrémente d'un second pas le circuit de comptage 11 qui, dès lors, fournit un signal à l'entrée B du circuit de gestion de signal d'alarme 10. Comme précédemment, au bout du temps de temporisation du circuit de remise à zéro 12, ce dernier remet à zéro le circuit de comptage 11.If, on the contrary, during the delay time of the reset circuit 12, the reception circuit 8 receives a signal from any of the intrusion detection circuits 2a to 2n, with the exception of a intrusion signal of the intrusion detection circuit having supplied the first intrusion signal since it is momentarily inhibited or blocked, the reception circuit a provides by its output a new signal at the input A of the management circuit of alarm signal 10 and, in addition, increments the counting circuit 11 by a second step, which therefore supplies a signal to input B of the alarm signal management circuit 10. As before, at the end of the delay time of the reset circuit 12, the latter resets the counting circuit 11 to zero.

Il ressort de la description qui précède qui, lorsque l'entrée A du circuit de gestion de signal d'alarme 10 est activée, celà résulte du fait que l'un quelconque des circuits de détection d'intrusion 2a à 2n a été activé.It appears from the foregoing description that, when the input A of the alarm signal management circuit 10 is activated, this results from the fact that any one of the intrusion detection circuits 2a to 2n has been activated.

Par contre, lorsque l'entrée B du circuit de gestion de signal d'alarme 10 est activée celà résulte du fait que l'un quelconque des circuits de détection d'intrusion 2a à 2n a été activé et que l'un quelconque des autres de ces circuits de détection d'intrusion a été également activé pendant le délai d'inhibition du premier de telle sorte que le signal apparaissant sur l'entrée B du circuit de gestion de signal d'alarme 10 signifie que l'intrusion détectée par l'un des circuits de détection d'intrusion est également détectée par un autre circuit d'intrusion et en conséquence est confirmée, ceci sans personnalisation individuelle des circuits de détection 2a à 2n.On the other hand, when the input B of the alarm signal management circuit 10 is activated, this results from the fact that any one of the intrusion detection circuits 2a to 2n has been activated and that any of the others of these intrusion detection circuits was also activated during the inhibition delay of the first so that the signal appearing on input B of the alarm signal management circuit 10 means that the intrusion detected by the one of the intrusion detection circuits is also detected by another intrusion circuit and consequently is confirmed, this without individual personalization of the detection circuits 2a to 2n.

Bien entendu, le circuit d'alarme 10 pourrait comprendre d'autres circuits en vue de l'interprétation des messages complets transmis par les circuits de détection 2a à 2n ou des messages permettant de traiter les détecteurs d'intrusion par groupe.Of course, the alarm circuit 10 could include other circuits for the interpretation of the complete messages transmitted by the detection circuits 2a to 2n or messages making it possible to process the intrusion detectors by group.

Comme on peut le voir sur la figure, le circuit de gestion de signal d'alarme 10 présente, dans l'exemple, des sorties qui sont respectivement reliées à une première sirène 13 installée dans le local ou dans la propriété à surveiller, à une seconde sirène 14 installée à l'extérieur du local à surveiller, à un premier transmetteur téléphonique 15 et un émetteur radioélectrique à longue portée 16.As can be seen in the figure, the alarm signal management circuit 10 has, in the example, outputs which are respectively connected to a first siren 13 installed in the room or in the property to be monitored, to a second siren 14 installed outside the room to be monitored, to a first telephone transmitter 15 and a long-range radio transmitter 16.

Dans un exemple particulier de fonctionnement, lorsque l'entrée A du circuit de gestion de signal d'alarme 10 est activée, ce dernier active la sirène intérieure 13 et le transmetteur télé­phonique 15 qui transmet une information d'intrusion simple par voie téléphonique à un endroit extérieur au local, par exemple à un voisin du local ou à une autre habitation du propriétaire de ce local.In a particular example of operation, when the input A of the alarm signal management circuit 10 is activated, the latter activates the internal siren 13 and the telephone transmitter 15 which transmits simple intrusion information by telephone to a place outside the room, for example to a neighbor of the room or to another dwelling of the owner of this room.

Lorsque l'entrée B du circuit de gestion de signal d'alarme 10 est activée, ce qui correspond comme on l'a vu précédem­ment à une confirmation de l'intrusion, ce circuit 10 active la sirène extérieure 14, l'émetteur radioélectrique à longue portée 16 ainsi que de nouveau le transmetteur téléphonique 15, ce dernier permettant la transmission par voies téléphonique et radioélectrique d'un signal par exemple à une agence de télésurveillance qui peut, sur la base d'un signal d'intrusion confirmé, dépêcher du personnel d'intervention au local surveillé par l'installation de surveil­lance 1. Bien entendu, toute autre combinaison de modes d'alarmes peut être envisagée.When the input B of the alarm signal management circuit 10 is activated, which corresponds as we have seen previously to a confirmation of the intrusion, this circuit 10 activates the outdoor siren 14, the long-range radio transmitter 16 and again the telephone transmitter 15, the latter allowing the transmission by telephone and radio of a signal for example to a remote monitoring agency which may, on the basis of a confirmed intrusion signal, dispatch intervention personnel to the premises monitored by the monitoring installation 1. Of course, any other combination of alarm modes can be envisaged.

La présente invention ne se limite pas à l'exemple ci-dessus décrit. En particulier, la transmission par voie radio­électrique à l'aide du circuit d'émission 5 et du circuit de récep­tion 8 peut être remplacée par une liaison filaire ou par un circuit bus, communs aux détecteurs 2a à 2n. Dans ce cas, le circuit d'émis­sion 5 serait remplacé par un circuit de fourniture de signal correspondant au signal de sortie du circuit de réception 8, ce circuit de fourniture de signal étant également susceptible d'être inhibé à l'aide d'un circuit d'inhibition momentanée équivalent au circuit d'inhibition 7. Le circuit d'inhibition 7 pourrait agir sur le détecteur 4 à la place d'agir sur le circuit d'émission 5, ou pourrait agir sur les deux à la fois. En outre, d'autres groupes équivalents au groupe de circuits de détection 2a à 2n pourraient être associés au circuit d'alarme 3.The present invention is not limited to the example described above. In particular, the radio transmission using the transmission circuit 5 and the reception circuit 8 can be replaced by a wired link or by a bus circuit, common to the detectors 2a to 2n. In this case, the transmission circuit 5 would be replaced by a signal supply circuit corresponding to the output signal of the reception circuit 8, this signal supply circuit also being capable of being inhibited using a momentary inhibition circuit equivalent to inhibition circuit 7. The inhibition circuit 7 could act on the detector 4 instead of acting on the emission circuit 5, or could act on both at the same time. In addition, other groups equivalent to the group of detection circuits 2a to 2n could be associated with the alarm circuit 3.

Bien d'autres variantes de réalisation de la présente invention sont possibles sans sortir du cadre défini par les revendi­cations annexées.Many other alternative embodiments of the present invention are possible without departing from the scope defined by the appended claims.

Claims (7)

1. Procédé de fonctionnement d'une installation de surveillance (1) d'un local en vue de fournir des signaux d'alarme (B) en cas d'intrusion, comprenant au moins un groupe de circuits de détection ( 2a...2n) adaptés pour fournir, quand se produit une détection, des signaux d'intrusion à un circuit d'alarme (3), dans lequel ce circuit d'alarme (3) fournit un signal d'alarme (B) après réceptions successives d'au moins deux signaux d'intrusion séparés d'au plus un délai (t) déterminé, caractérisé par le fait qu'à la suite de la fourniture d'un signal d'intrusion par l'un quelconque des circuits de détection au circuit d'alarme, tout nouveau signal d'intrusion, qui pourrait être fourni par ce circuit de détection pendant un délai qui correspond au délai précité (t), est inhibé ou bloqué.1. Operating method of a monitoring installation (1) of a room in order to provide alarm signals ( B ) in the event of an intrusion, comprising at least one group of detection circuits (2a ... 2n) adapted to supply, when a detection occurs, intrusion signals to an alarm circuit (3), in which this alarm circuit (3) supplies an alarm signal (B) after successive reception of d '' at least two intrusion signals separated by at most a determined delay (t), characterized in that following the supply of an intrusion signal by any of the detection circuits to the circuit alarm, any new intrusion signal, which could be supplied by this detection circuit for a period which corresponds to the abovementioned period (t), is inhibited or blocked. 2. Procédé selon la revendication 1, caractérisé par le fait qu'à la réception d'un premier signal d'intrusion, le circuit d'alarme (3) génère un premier signal d'alarme (A) et à la réception d'un second signal d'intrusion pendant le délai précité, le circuit d'alarme génère un second signal d'alarme (B) différencié par rapport audit premier signal d'alarme.2. Method according to claim 1, characterized in that on reception of a first intrusion signal, the alarm circuit (3) generates a first alarm signal ( A ) and on reception of a second intrusion signal during the aforementioned delay, the alarm circuit generates a second alarm signal ( B ) differentiated from said first alarm signal. 3. Procédé selon l'une des revendications 1 et 2, caractérisé par le fait que les signaux d'intrusion d'au moins certains desdits circuits de détection (2a...2n) sont transmis par voie radioélectrique au circuit d'alarme (3) génèrant les signaux d'alarme (A, B), leur circuit émetteur ou leur détecteur étant inhibés ou bloqués pendant le délai précité.3. Method according to one of claims 1 and 2, characterized in that the intrusion signals from at least some of said detection circuits (2a ... 2n) are transmitted by radio to the alarm circuit ( 3) generating the alarm signals ( A , B ), their transmitter circuit or their detector being inhibited or blocked during the aforementioned delay. 4. Procédé selon l'une des revendications 1 et 2, caractérisé par le fait que les signaux d'intrusion d'au moins certains desdits circuits de détection (2a...2n) sont transmis au circuit d'alarme sur au moins un canal d'échange unique, notamment du type radioélectrique, bus filaire ou optoélectronique, par porteuse superposée au réseau électrique, ou par transmission infrarouge.4. Method according to one of claims 1 and 2, characterized in that the intrusion signals from at least some of said detection circuits (2a ... 2n) are transmitted to the alarm circuit on at least one single exchange channel, in particular of the radioelectric, wired or optoelectronic type, by carrier superimposed on the electrical network, or by infrared transmission. 5. Installation de surveillance (1) d'un local en vue de fournir des signaux d'alarme (B) en cas d'intrusion, notamment pour la mise en oeuvre du procédé selon l'une quelconque des revendi­ cations précédentes, comprenant au moins un groupe de circuits de détection (2a...2n) adaptés pour fournir, quand se produit une détection, des signaux d'intrusion à un circuit d'alarme (3), ce circuit d'alarme (3) comprenant des moyens pour fournir un signal d'alarme (B) après réceptions successives d'au moins deux signaux d'intrusion séparés d'au plus un délai (t) déterminé, caractérisée par le fait que chaque circuit de détection (2a...2n) comprend des moyens (7) pour momentanément inhiber ou bloquer, après qu'il ait fourni un signal d'intrusion, tout nouveau signal d'intrusion qui pourrait être fourni par ce circuit de détection pendant un délai qui correspond au délai précité (t) .5. Monitoring installation (1) of a room with a view to supplying alarm signals ( B ) in the event of an intrusion, in particular for implementing the method according to any one of the claims. previous cations, comprising at least one group of detection circuits (2a ... 2n) adapted to supply, when a detection occurs, intrusion signals to an alarm circuit (3), this alarm circuit ( 3) comprising means for supplying an alarm signal (B) after successive reception of at least two intrusion signals separated by at most a determined delay (t), characterized in that each detection circuit (2a ... 2n) comprises means (7) for momentarily inhibiting or blocking, after it has supplied an intrusion signal, any new intrusion signal which could be supplied by this detection circuit for a period which corresponds to the aforementioned time limit (t). 6. Installation selon la revendication 5 , caractérisée par le fait que chaque circuit de détection (2a...2n) comprend un détecteur (4), un circuit d'émission (5), ce circuit de détection comprenant en outre un moyen d'inhibition momentané (7) inhibant ou bloquant son détecteur (4) et/ou son circuit d'émission (5) pendant le délai précité (t) après émission d'un signal d'intrusion par le circuit d'émission (5).6. Installation according to claim 5, characterized in that each detection circuit (2a ... 2n) comprises a detector (4), an emission circuit (5), this detection circuit further comprising means d momentary inhibition (7) inhibiting or blocking its detector (4) and / or its transmission circuit (5) during the aforementioned time (t) after transmission of an intrusion signal by the transmission circuit (5) . 7. Installation selon l'une des revendications 5 et 6, caractérisée par le fait que chaque circuit de détection (2a...2n) comprend un circuit d'émission (5) de signaux radioélectriques d'intrusion et que le circuit d'alarme (3) comprend un circuit de réception (8) de ces signaux d'intrusion.7. Installation according to one of claims 5 and 6, characterized in that each detection circuit (2a ... 2n) comprises a transmission circuit (5) of radio intrusion signals and that the circuit alarm (3) comprises a reception circuit (8) of these intrusion signals.
EP19880112226 1987-07-28 1988-07-28 Working method and room monitoring arrangement Expired - Lifetime EP0306692B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710697 1987-07-28
FR8710697A FR2618931B1 (en) 1987-07-28 1987-07-28 METHOD OF OPERATING A MONITORING INSTALLATION

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EP0306692A1 true EP0306692A1 (en) 1989-03-15
EP0306692B1 EP0306692B1 (en) 1993-03-03

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DE (1) DE3878793T2 (en)
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FR (1) FR2618931B1 (en)

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US3599195A (en) * 1968-05-31 1971-08-10 Pinkerton S Inc Dual alarm, coaxial line resonator, intrusion detection system
FR2359471A1 (en) * 1976-07-23 1978-02-17 Helita Centralised security surveillance system - has logic circuit initiating alarm if abnormal condition persists for specified time period
DE2816192A1 (en) * 1978-04-14 1979-10-25 Zettler Elektrotechn Alois Fire alarm system using delayed detectors - has evaluating circuit for false alarm recognition even after system reconnection
US4195286A (en) * 1978-01-06 1980-03-25 American District Telegraph Company Alarm system having improved false alarm rate and detection reliability
GB2060967A (en) * 1979-09-17 1981-05-07 Radiovisor Patent Ltd Intruder alarm system
GB1592773A (en) * 1977-10-05 1981-07-08 Chubb Alarms Ltd Alarm systems
EP0141987A2 (en) * 1983-10-17 1985-05-22 Cerberus Ag Alarm signalling method and application device therefor
FR2573893A1 (en) * 1984-11-23 1986-05-30 Baldach Patricia Method and devices for triggering an alarm or an automatic unit while avoiding untimely triggering
FR2575571A1 (en) * 1985-01-03 1986-07-04 Securite Automatisme Protectio Anti-intrusion safety installation
US4611197A (en) * 1985-02-19 1986-09-09 Sansky Michael J Malfunction-detecting status monitoring system
FR2592200A1 (en) * 1985-12-24 1987-06-26 Maisonnette Michel Electronic device for detecting any untimely triggering of an alarm

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599195A (en) * 1968-05-31 1971-08-10 Pinkerton S Inc Dual alarm, coaxial line resonator, intrusion detection system
FR2359471A1 (en) * 1976-07-23 1978-02-17 Helita Centralised security surveillance system - has logic circuit initiating alarm if abnormal condition persists for specified time period
GB1592773A (en) * 1977-10-05 1981-07-08 Chubb Alarms Ltd Alarm systems
US4195286A (en) * 1978-01-06 1980-03-25 American District Telegraph Company Alarm system having improved false alarm rate and detection reliability
DE2816192A1 (en) * 1978-04-14 1979-10-25 Zettler Elektrotechn Alois Fire alarm system using delayed detectors - has evaluating circuit for false alarm recognition even after system reconnection
GB2060967A (en) * 1979-09-17 1981-05-07 Radiovisor Patent Ltd Intruder alarm system
EP0141987A2 (en) * 1983-10-17 1985-05-22 Cerberus Ag Alarm signalling method and application device therefor
FR2573893A1 (en) * 1984-11-23 1986-05-30 Baldach Patricia Method and devices for triggering an alarm or an automatic unit while avoiding untimely triggering
FR2575571A1 (en) * 1985-01-03 1986-07-04 Securite Automatisme Protectio Anti-intrusion safety installation
US4611197A (en) * 1985-02-19 1986-09-09 Sansky Michael J Malfunction-detecting status monitoring system
FR2592200A1 (en) * 1985-12-24 1987-06-26 Maisonnette Michel Electronic device for detecting any untimely triggering of an alarm

Also Published As

Publication number Publication date
EP0306692B1 (en) 1993-03-03
FR2618931A1 (en) 1989-02-03
ES2045032T3 (en) 1994-01-16
FR2618931B1 (en) 1994-05-27
DE3878793T2 (en) 1993-09-30
DE3878793D1 (en) 1993-04-08

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