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EP0888598B1 - Signal discriminating method and device for detecting intrusion into premises - Google Patents

Signal discriminating method and device for detecting intrusion into premises Download PDF

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Publication number
EP0888598B1
EP0888598B1 EP97952967A EP97952967A EP0888598B1 EP 0888598 B1 EP0888598 B1 EP 0888598B1 EP 97952967 A EP97952967 A EP 97952967A EP 97952967 A EP97952967 A EP 97952967A EP 0888598 B1 EP0888598 B1 EP 0888598B1
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EP
European Patent Office
Prior art keywords
variations
pressure
premises
amplitude
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97952967A
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German (de)
French (fr)
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EP0888598A1 (en
Inventor
Damien Bouillet
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range

Definitions

  • the invention relates to a method for discriminating signals used in the field of intrusion detection in a room.
  • the invention relates to the field of intrusion detection in a room and relates specifically to a method of discriminating the signals produced by the less a means sensitive to variations in the pressure of a gaseous fluid constituting the atmosphere of said room.
  • the invention also relates to devices for implementing the method of the invention.
  • room any closed volume capable of receiving at least one no one, such as a room in a building, a shed, a vehicle interior.
  • the technical field of the invention is that of detection devices intrusions into a room, such as those operating by detecting at least a variation in pressure in said room, such as that resulting from the opening of minus an exit from this room.
  • the invention relates more particularly but not exclusively to a improvement of the device which is the subject of patent FR-A-2,696,033 of the applicant.
  • Detection devices of this type use at least one means which, sensitive to the air pressure of the monitored room, generates an electrical signal by report with any variation of the pressure noted in the said local.
  • Intrusion detection devices that work this way, are sensitive to pressure variations generated in the room by phenomena external to the local area, such as those resulting from a gale or a displacement of air generated by the passage of a vehicle.
  • WO-95/06925 describes a device for detecting intrusions in premises, this device comprising two infrasonic detectors placed at inside and outside the premises. By juxtaposition of signals from the two detectors, this device allows the deactivation of an alarm when a condition relative to the signal from the external detector is reached.
  • a first object of the invention is a method of signal discrimination produced by at least one pressure-sensitive means in the field of intrusion detection in a room.
  • the invention also relates to devices for implementing the method of the invention.
  • a device 1 for detecting an intrusion in a room 2 this device being of the type of those operating by detection of at minus a variation in the pressure of the gaseous atmosphere 3 prevailing in said room 2, such as a pressure variation resulting from the opening of at least one outlet 4 of this room 2.
  • the present process is therefore based on the exploitation of this phenomenon.
  • Means 5 which, sensitive to variations in the pressure of the atmosphere gas in the room, is capable of producing at least one electrical signal S reflecting variations in this pressure, is of the type comprising at least two elements 5A appreciably distinct and separated from each other by a determined value.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

The invention concerns a method for discriminating between signals generated by means sensitive to variations in the pressure of a gaseous fluid. This method is characterized in that, in order to discriminate between electrical signals, it operates as follows: when a means (5) sensitive to pressure variations generates an electrical signal, the evolution of the amplitude of at least one characteristic of this signal is monitored and, when two successive amplitude variations (A1, A2) substantially opposite relative to a median value (M) are detected, a means (6) for informing people is inhibited, whereas when amplitude variations of a different type are detected, the means (6) for informing people is activated.

Description

L'invention se rapporte à un procédé de discrimination de signaux utilisés dans le domaine de la détection d'intrusions dans un local.The invention relates to a method for discriminating signals used in the field of intrusion detection in a room.

L'invention concerne le domaine de la détection d'intrusions dans un local et se rapporte précisément à un procédé de discrimination des signaux produits par au moins un moyen sensible aux variations de la pression d'un fluide gazeux constituant l'atmosphère dudit local.The invention relates to the field of intrusion detection in a room and relates specifically to a method of discriminating the signals produced by the less a means sensitive to variations in the pressure of a gaseous fluid constituting the atmosphere of said room.

L'invention se rapporte également aux dispositifs pour la mise en oeuvre du procédé de l'invention.The invention also relates to devices for implementing the method of the invention.

Par local, on désigne tout volume fermé susceptible de recevoir au moins une personne, tel une pièce d'un immeuble, un hangar, un habitacle de véhicule.By room is meant any closed volume capable of receiving at least one no one, such as a room in a building, a shed, a vehicle interior.

Le domaine technique de l'invention est celui des dispositifs de détection d'intrusions dans un local, du type de ceux fonctionnant par détection d'au moins une variation de pression dans ledit local, telle celle résultant de l'ouverture d'au moins une issue de ce local.The technical field of the invention is that of detection devices intrusions into a room, such as those operating by detecting at least a variation in pressure in said room, such as that resulting from the opening of minus an exit from this room.

L'invention vise plus particulièrement mais non exclusivement un perfectionnement au dispositif objet du brevet FR-A-2.696.033 du demandeur.The invention relates more particularly but not exclusively to a improvement of the device which is the subject of patent FR-A-2,696,033 of the applicant.

Les dispositifs de détection de ce type mettent en oeuvre au moins un moyen qui, sensible à la pression de l'air du local surveillé, élabore un signal électrique en rapport avec toute variation de la pression constatée dans le dit local.Detection devices of this type use at least one means which, sensitive to the air pressure of the monitored room, generates an electrical signal by report with any variation of the pressure noted in the said local.

Les dispositifs de détection d'intrusions qui fonctionnent de cette manière, sont sensibles aux variations de pression engendrées dans le local par des phénomènes extérieurs audit local, telles celles résultant d'un coup de vent ou d'un déplacement d'air généré par le passage d'un véhicule.Intrusion detection devices that work this way, are sensitive to pressure variations generated in the room by phenomena external to the local area, such as those resulting from a gale or a displacement of air generated by the passage of a vehicle.

Le document WO-95/06925 décrit un dispositif pour détecter les intrusions dans des locaux, ce dispositif comprenant deux détecteurs infrasonores placés à l'intérieur et à l'extérieur des locaux. Par juxtaposition des signaux issus des deux détecteurs, ce dispositif permet la désactivation d'une alarme lorsqu'une condition relative au signal issu du détecteur externe est atteinte.WO-95/06925 describes a device for detecting intrusions in premises, this device comprising two infrasonic detectors placed at inside and outside the premises. By juxtaposition of signals from the two detectors, this device allows the deactivation of an alarm when a condition relative to the signal from the external detector is reached.

Un premier objet de l'invention est un procédé de discrimination des signaux produits par au moins un moyen sensible à la pression dans le domaine de la détection d'intrusions dans un local.A first object of the invention is a method of signal discrimination produced by at least one pressure-sensitive means in the field of intrusion detection in a room.

A cet effet, l'invention telle que revendiquée a pour objet un procédé de discrimination des signaux produits par au moins un moyen sensible à la pression dans le domaine de la détection d'intrusions dans un local caractérisé en ce que, pour discriminer les signaux électriques :

  • lorsque le moyen sensible aux variations de pression produit un signal électrique, on surveille l'évolution de l'amplitude d'au moins une caractéristique de ce signal et,
  • lorsqu'on détecte deux variations successives d'amplitudes sensiblement opposées par rapport à une valeur médiane, on inhibe le moyen d'information des personnes tandis que,
  • lorsqu'on détecte des variations d'amplitude d'une autre nature, on active le moyen d'information des personnes.
To this end, the invention as claimed relates to a method for discriminating the signals produced by at least one pressure-sensitive means in the field of intrusion detection in a room characterized in that, to discriminate the signals electric:
  • when the means sensitive to variations in pressure produces an electrical signal, the evolution of the amplitude of at least one characteristic of this signal is monitored and,
  • when two successive variations in amplitudes which are substantially opposite with respect to a median value are detected, the means of information of persons is inhibited while,
  • when variations in amplitude of another nature are detected, the person's information medium is activated.

L'invention se rapporte également aux dispositifs pour la mise en oeuvre du procédé de l'invention.The invention also relates to devices for implementing the method of the invention.

L'invention sera bien comprise à l'aide de la description ci-après faite à titre d'exemple non limitatif en regard du dessin, ci-annexé, qui représente schématiquement un dispositif qui met en oeuvre le procédé de l'invention.The invention will be better understood with the aid of the description below made by way of of nonlimiting example with regard to the drawing, attached hereto, which represents schematically a device which implements the method of the invention.

En se reportant au dessin, on voit un dispositif 1 de détection d'une intrusion dans un local 2, ce dispositif étant du type de ceux fonctionnant par détection d'au moins une variation de la pression de l'atmosphère gazeuse 3 régnant dans ledit local 2, telle une variation de pression résultant de l'ouverture d'au moins une issue 4 de ce local 2.Referring to the drawing, we see a device 1 for detecting an intrusion in a room 2, this device being of the type of those operating by detection of at minus a variation in the pressure of the gaseous atmosphere 3 prevailing in said room 2, such as a pressure variation resulting from the opening of at least one outlet 4 of this room 2.

Ce dispositif 1 comprend au moins :

  • un moyen 5 qui, sensible aux variations de la pression de l'atmosphère gazeuse du local, est à même de produire au moins un signal électrique S reflétant au moins les variations de cette pression et,
  • au moins un moyen 6 exploitant ce signal en vue de l'information de personnes (non représentées) quant à la détection d'une intrusion dans le local équipé du dispositif.
This device 1 comprises at least:
  • a means 5 which, sensitive to variations in the pressure of the gaseous atmosphere of the premises, is capable of producing at least one electrical signal S reflecting at least the variations of this pressure and,
  • at least one means 6 exploiting this signal with a view to informing people (not shown) as to the detection of an intrusion into the room equipped with the device.

De manière remarquable, pour discriminer les signaux électriques :

  • lorsque le moyen 5 sensible aux variations de pression produit un signal électrique, on surveille l'évolution de l'amplitude d'au moins une caractéristique de ce signal et,
  • lorsqu'on détecte deux variations successives d'amplitudes A1, A2 sensiblement opposées par rapport à une valeur M médiane, on inhibe le moyen 6 d'information des personnes tandis que,
  • lorsqu'on détecte des variations d'amplitude d'une autre nature, on active le moyen 6 d'information des personnes.
Remarkably, to discriminate between electrical signals:
  • when the means 5 sensitive to pressure variations produces an electrical signal, the evolution of the amplitude of at least one characteristic of this signal is monitored and,
  • when two successive variations in amplitudes A1, A2 are substantially opposite with respect to a median value M, the means 6 for informing people are inhibited while,
  • when variations in amplitude of another nature are detected, the means 6 for informing people are activated.

Au cours de ses recherches, l'inventeur a constaté que les variations de pression engendrées dans l'atmosphère d'un local suite à un évènement naturel extérieur au local, tel un coup de vent, produisent une évolution de pression comprenant deux ondes d'amplitudes opposées.During his research, the inventor found that variations in pressure generated in the atmosphere of a room following a natural event outside the room, like a gust of wind, produce a change in pressure comprising two waves of opposite amplitudes.

Le présent procédé est donc fondé sur l'exploitation de ce phénomène.The present process is therefore based on the exploitation of this phenomenon.

Les moyens pour la mise en oeuvre du procédé de l'invention sont remarquables en ce qu'ils comprennent :

  • un moyen 7 de surveillance de l'évolution de l'amplitude d'au moins une caractéristique de ce signal et de détection de deux variations successives d'amplitudes sensiblement opposées par rapport à une valeur médiane, et
  • un moyen 8 pour inhiber le moyen 6 d'information des personnes lorsque deux variations successives d'amplitudes sensiblement opposées par rapport à une valeur médiane, sont détectées.
The means for implementing the process of the invention are remarkable in that they include:
  • means 7 for monitoring the development of the amplitude of at least one characteristic of this signal and for detecting two successive variations in amplitudes which are substantially opposite with respect to a median value, and
  • a means 8 for inhibiting the means 6 for informing people when two successive variations in amplitudes substantially opposite with respect to a median value are detected.

Le moyen 5 qui, sensible aux variations de la pression de l'atmosphère gazeuse du local, est à même de produire au moins un signal électrique S reflétant les variations de cette pression, est de type comprenant au moins deux éléments 5A sensiblement distincts et écartés l'un de l'autre d'une valeur déterminée.Means 5 which, sensitive to variations in the pressure of the atmosphere gas in the room, is capable of producing at least one electrical signal S reflecting variations in this pressure, is of the type comprising at least two elements 5A appreciably distinct and separated from each other by a determined value.

Claims (3)

  1. A process for the discrimination of signals generated by at least one means sensitive to variations in the pressure of a gaseous fluid, constituting the atmosphere of premises, for the purpose of detecting intrusion into these premises (2), this process comprising the steps of detecting at least one variation in the pressure of the gaseous atmosphere (3) in the said premises (2), generating at least one electrical signal (S) reflecting at least the variations in this pressure, and informing individuals of the detection of intrusion into the premises equipped with the device, this process being characterised in that the development of the amplitude of at least one characteristic of the said electrical signal is monitored, and
    when two successive variations in amplitude (A1, A2) are detected which are substantially opposed relative to a median value (M), information of the individuals is inhibited, whereas
    when variations in amplitude of a different nature are detected, information of the individuals is activated.
  2. A device for detecting intrusion into premises according to claim 1, the said device on the one hand functioning by detecting at least one variation in the pressure of the gaseous atmosphere (3) in the said premises (2), such as a variation in pressure resulting from the opening of at least one exit from these premises (2), and on the other hand comprising:
    at least one means (5) sensitive to variations in the pressure of the gaseous atmosphere of the premises and capable of generating at least one electrical signal (S) reflecting at least the variations in this pressure, and
    at least one means (6) utilising this signal for the purpose of informing individuals of the detection of intrusion into the premises equipped with the device,
    this device being characterised in that it comprises:
    a means (7) for monitoring the development of the amplitude of at least one characteristic of this signal and detecting two successive variations in amplitude which are substantially opposed relative to a median value, and
    a means (8) for inhibiting the means (6) for informing individuals when two successive variations in amplitude are detected which are substantially opposed relative to a median value.
  3. A device according to claim 2, characterised in that the means (5), sensitive to variations in the pressure of the gaseous atmosphere of the premises and capable of generating at least one electrical signal (S) reflecting at least the variations in this pressure, is of the type comprising at least two elements (5A) which are substantially distinct and separated by a specified value.
EP97952967A 1997-01-03 1997-12-22 Signal discriminating method and device for detecting intrusion into premises Expired - Lifetime EP0888598B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9700123A FR2758201B1 (en) 1997-01-03 1997-01-03 METHOD FOR DISCRIMINATION OF SIGNALS FOR THE DETECTION OF INSTRUMENTS IN A PREMISES, MEANS FOR IMPLEMENTING THE METHOD AND DEVICES COMPRISING SUCH MEANS
FR9700123 1997-01-03
PCT/FR1997/002374 WO1998029845A1 (en) 1997-01-03 1997-12-22 Signal discriminating method and device for detecting intrusion into premises

Publications (2)

Publication Number Publication Date
EP0888598A1 EP0888598A1 (en) 1999-01-07
EP0888598B1 true EP0888598B1 (en) 2002-06-19

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EP97952967A Expired - Lifetime EP0888598B1 (en) 1997-01-03 1997-12-22 Signal discriminating method and device for detecting intrusion into premises

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US (1) US6335683B1 (en)
EP (1) EP0888598B1 (en)
CN (1) CN1214781A (en)
AT (1) ATE219591T1 (en)
DE (1) DE69713495D1 (en)
FR (1) FR2758201B1 (en)
WO (1) WO1998029845A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7479878B2 (en) * 2004-07-28 2009-01-20 Senstar-Stellar Corporation Triboelectric, ranging, or dual use security sensor cable and method of manufacturing same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL52286A (en) * 1976-06-23 1979-12-30 Multisafe Ag Burglar alarm
GB2067324B (en) * 1980-01-10 1983-09-07 Shorrock Dev Intruder detection apparatus
DE3071890D1 (en) * 1980-08-20 1987-02-19 Secom Co Ltd Ultrasonic warning system
US4628318A (en) * 1983-12-02 1986-12-09 Rockwell International Corporation Ground clutter suppression technique
US5079422A (en) * 1989-09-06 1992-01-07 Gaztech Corporation Fire detection system using spatially cooperative multi-sensor input technique
US5790413A (en) * 1993-03-22 1998-08-04 Exxon Chemical Patents Inc. Plant parameter detection by monitoring of power spectral densities
EP0705469A1 (en) * 1993-09-01 1996-04-10 A3P S.A.R.L. Device for detecting an intruder in a building or vehicle by infrasonic and/or pressure wave detection and method for so detecting an intruder
US5464369A (en) * 1994-02-25 1995-11-07 Johnson Service Company Method and apparatus for estimating the rate at which a gas is generated within an enclosed space
DE69510287T2 (en) * 1994-09-09 2000-03-23 Denso Corp., Kariya Pneumatic tire pressure gauge
CA2201080C (en) * 1996-03-27 2000-01-25 Her Majesty The Queen, In Right Of Canada, As Represented By The Ministe R Of Industry Ultrasonic detection system for safety of vehicle passengers

Also Published As

Publication number Publication date
WO1998029845A1 (en) 1998-07-09
ATE219591T1 (en) 2002-07-15
CN1214781A (en) 1999-04-21
FR2758201A1 (en) 1998-07-10
DE69713495D1 (en) 2002-07-25
FR2758201B1 (en) 1999-02-26
US6335683B1 (en) 2002-01-01
EP0888598A1 (en) 1999-01-07

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