WO1984001456A1 - Self-controlled and self protected alarm device - Google Patents

Self-controlled and self protected alarm device Download PDF

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Publication number
WO1984001456A1
WO1984001456A1 PCT/FR1983/000194 FR8300194W WO8401456A1 WO 1984001456 A1 WO1984001456 A1 WO 1984001456A1 FR 8300194 W FR8300194 W FR 8300194W WO 8401456 A1 WO8401456 A1 WO 8401456A1
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WIPO (PCT)
Prior art keywords
self
alarm
protection
frequency
resistance
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PCT/FR1983/000194
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French (fr)
Inventor
Jean Faget
Original Assignee
Jean Faget
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 Jean Faget filed Critical Jean Faget
Priority to DE8383902995T priority Critical patent/DE3376702D1/en
Priority to AT83902995T priority patent/ATE34473T1/en
Publication of WO1984001456A1 publication Critical patent/WO1984001456A1/en

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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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • 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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits

Definitions

  • the present invention relates to an electronic alarm, security, control or surveillance device comprising self-protection and dynamic self-control circuits intended to detect any faults, breakdowns or sabotages liable to render inoperative the device or installation.
  • the device according to the invention comprises two parts: a module A (FIG. 1) controlled by the detection and self-protection loops and a module B (FIG. 2) which receives and controls the information coming from the previous one and which activates the various devices intended to signal possible malfunctions and to produce the various actions necessary in the event of an alarm: triggering of sirens, lighting switching on, activation of cameras. . . the output c of module A is connected to the input d of module B, either directly or by any wireless connection method.
  • Detection.- Detectors Dr, Dr '... each comprising a resistor in series with contacts are placed in series in a detection loop, constituting with P 2, R 9, R 8 and R 7 a balanced bridge around point a.
  • IC 2 and IC 3 mounted as threshold detectors, one positive and the other negative, cause the bridge to become unbalanced with a low voltage state at point b which establishes a positive voltage on output 3 of IC 4 for one duration limited to about one second by the set R 13 - C 11 playing the timer role.
  • the alarm will be triggered and locked for two to three minutes using IC 6 (fig.2).
  • the detection loop can be formed from I to 10 detectors each comprising a resistance of 3.3 kilohms; the resistor R 9 (of 33 kilohms) can itself be replaced by 1 to 10 detectors of 3.3 kilohms (plus an adjustable resistor).
  • a light-emitting diode L 1 makes it possible to control the balance of the bridge by means of P 2 (short-circuited R 13 - C 11 for the duration of the adjustment).
  • IC 1 is mounted as a square signal generator with frequency f, for example equal to 15 Hz.
  • R 8 3.3 kilohms
  • T 2 made conductive through C 2
  • R 7 also 3.3 kilohms
  • T 1 is added to the total resistance of the bridge due to the momentary blocking of T 1 through C 3-
  • IC 2 and IC 3 the appearance at point c of rectangular signals of frequency 2 f, in this case 30 Hz.
  • These self-controlled signals are picked up by C 19 on output 3 of IC 6 (point f), that is to say practically at the terminals of the alarm relay REL 1, and applied by means of T 3 to the frequency control circuit formed by IC 7 and IC 8.
  • the operating light L 3 goes out and the REL 2 relay activates the audible fault warning.
  • REL 1 is timed by C 17 to prevent the self-checking signals from triggering the alarm.
  • the self-controlled signals are transmitted directly to IC 7 (from g) and indicate, thanks to L 3 and the buzzer, the maintenance or disappearance of the cause of the alarm, c that is, whether the bridge imbalance persists or not.
  • the same self-monitoring system can be used by placing the detectors (with a resistor) in a Wheatstone bridge.
  • the same process can be applied in the case of a detection loop whose total resistance is measured and stored in memory by a microprocessor, any variation of a certain importance of the value stored causing a change of state to the output of the circuit.
  • the signal generator IC 1 is controlled by a self-protection loop in which are placed (in series) the microswitches (Sw, Sw '...) protecting the various elements of the installation, closed by the capacitor C 1.
  • the cut or short-circuit of the self-protection loop causes the 15 Hz oscillations to disappear. These signals are applied by D 3 and C 12, after phase shift by R 17, C 13 and R 16, at the entry (2-6) of IC 4 and are found in the form of short pulses at point c. These pulses at 15 Hz are controlled by IC 9, and their absence causes the ignition of L 4 and the triggering of the fault horn.
  • the self-protection loop can usefully double the supply and detection lines and, in general, the conductors connecting the different parts of the installation.
  • An on / off contactor (K1-K2-K3) enables the alarm to be put out of standby and to neutralize the self-monitoring system, the self-protection system remaining only active; it can be used to instantly interrupt the alarm siren.
  • the self-monitoring and self-protection system is particularly suitable for a wireless link between the various elements of the installation.
  • R 1 0.5 megohm
  • R 2 10 kilohms
  • R 3 47 kilohms
  • R 4 0.47 megohm
  • R 5 10 kilohms
  • R 6 0.47 megohm
  • R 7, R 8 3.3 kilohms
  • R 9 33 kilohms
  • R 12 0.1 megohm
  • R 13 1 megohm
  • R 14 0.47 megohm
  • R 16 1 megohm
  • R 17 0.22 megohm
  • R 18 10 kilohms
  • R 19 560 ohms
  • R 23 1 megohm
  • R 24 6.8 megohms
  • R 25 1.5 megohm
  • R 26 560 ohms
  • R 27 10
  • the present invention is not limited to the single embodiment described above by way of example, but also applies to all the variants and other embodiments implementing the same methods, in particular by using different components or microprocessors.
  • the device which is the subject of the invention makes it possible to make the operation of the apparatus and of the alarm, surveillance, security, control, measurement, etc. operations very secure, by warning of breakdowns, faults, incidents, sabotage. , etc., which could render these devices inoperative.
  • This device specially designed for the protection of goods and premises against theft and intrusion, can also be used for fire detection and prevention. It can also be adapted to various other uses, in particular in industry, for medical surveillance, etc.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Alarm Systems (AREA)

Abstract

The invention relates to an electronic self-controlled alarm device. Set off conditions of the alarm are periodically established by varying alternatively into plus and into minus the resistance of the detection loop wherein are arranged detectors comprising a resistance in series with contacts. A self protection capacitive loop controls a square signal generator which produces: a) short pulses having the frequency f (self-protection), b) rectangular signals having the frequency 2f (self-control), verified at the terminals of the time delayed alarm relay. The cut-off or the shorting of a detector or of the detection loop sets off the alarm. The absence of self protection pulses or an incorrect frequency of the self-control signals sets off a fault warning device. The invention applies to alarm, surveyance, control, measurement apparatus and installations used for the protection against burglary and fire, in the industry, for the medical surveyance, etc.

Description

DISPOSITIF D'ALARME AUTOCONTROLE ET AUTOPROTEGE la présente invention concerne un dispositif électronique d'alarme, de sécurité, de contrôle ou de surveillance comportant des circuits d'autoprotection et d'autocontrôlé dynamique destinés à déceler tous défauts , pannes ou sabotages susceptibles de rendre inopérants le dispositif ou l' installa tion. SELF-CONTROLLED AND SELF-PROTECTED ALARM DEVICE the present invention relates to an electronic alarm, security, control or surveillance device comprising self-protection and dynamic self-control circuits intended to detect any faults, breakdowns or sabotages liable to render inoperative the device or installation.
Le fonctionnement des dispositifs d'alarme courants est provoqué par l' ouverture de contacts (détecteurs ) normalement fermés ; un court-circuit accidentel ou provoqué (sabotage) des détecteurs ou de la ligne (boucle de détection) reliant les détecteurs à la, centrale suffit donc à neutraliser l' installation d'alarme.The operation of current alarm devices is caused by the opening of normally closed contacts (detectors); an accidental or provoked short-circuit (sabotage) of the detectors or of the line (detection loop) connecting the detectors to the central unit is therefore sufficient to neutralize the alarm installation.
On remédie à ce défaut en intégrant dans chaque détecteur une résistance placée en série avec les contacts . Les détecteurs sont eux-mâ mes montés en série dans une boucle de détection dont une variation de résistance en plus ou en moins déclenche l'alarme . Suivant la présente invention, on contrôle le bon fonctionnement du dispositif en plaçant périodiquement le circuit de détection dans les deux états qui doivent provoquer le déclenchement de l'alarme soit, alternativement, diminution de la résistance totale de la boucle, puis augmentation de cette mê me résistance d'une valeur correspondant à la résistance de chacun des détec t ours. Les signaux électriques ainsi obtenus sont contrôlés aux bornes du dispositif avertisseur d'alarme.This defect is remedied by integrating into each detector a resistor placed in series with the contacts. The detectors are themselves mounted in series in a detection loop whose variation in resistance more or less triggers the alarm. According to the present invention, the correct operation of the device is checked by periodically placing the detection circuit in the two states which must cause the alarm to be triggered, or alternatively decrease the total resistance of the loop, then increase this same. resistance of a value corresponding to the resistance of each of the detectors. The electrical signals thus obtained are checked at the terminals of the alarm warning device.
Le dispositif selon l' invention, décrit ci-dessous à titre d' exemple de réalisation, comporte deux parties : un module A (figure 1 ) commandé par les boucles de détection et d'autoprotection et un module B (figure 2 ) qui reçoit et contrôle les informations provenant du précédent et qui actionne les différents dispositifs destinés à signaler les défauts de fonctionnement éventuels et à produire les différentes actions nécessaires en cas d'alarme: déclenchement de sirènes, allunage de l'éclairage, mise en route de caméras . . . la sortie c du module A est reliée à l' entrée d du module B, soit directement , soit par un procédé quelconque de liaison sans fil.The device according to the invention, described below by way of example of embodiment, comprises two parts: a module A (FIG. 1) controlled by the detection and self-protection loops and a module B (FIG. 2) which receives and controls the information coming from the previous one and which activates the various devices intended to signal possible malfunctions and to produce the various actions necessary in the event of an alarm: triggering of sirens, lighting switching on, activation of cameras. . . the output c of module A is connected to the input d of module B, either directly or by any wireless connection method.
Détection.- Les détecteurs Dr, Dr' ... (fig.1 ) comportant chacun une résistance en série avec des contacts sont placés en série dans une boucle de détection, constituant avec P 2 , R 9 , R 8 et R 7 un pont équilibré autour du point a. IC 2 et IC 3 montés en détecteurs de seuil, l'un positif, l'autre négatif, provoquent lors du déséquilibre du pont un état bas de la tension au point b qui établit une tension positive sur la sortie 3 de IC 4 pendant une durée limitée à une seconde environ par l'ensemble R 13 - C 11 jouant le rδle de minuterie. Dans le cas d' ouverture d'un détecteur, de court-circuit (partiel ou total) ou de coupure de la boucle de détection, il y aura déclenchement et verrouillage de l'alarme pendant deux à trois minutes au moyen de IC 6 (fig.2). La boucle de détection peut être formée de I à 10 détecteurs comportant chacun une résistance de 3,3 kilohms; la résistance R 9 (de 33 kilohms) peut elle-même être remplacée par 1 à 10 détecteurs de 3,3 kilohms (plus une résistance ajustable). Une diode électroluminescente L 1 permet de contrôler l'équilibrage du pont au moyen de P 2 (on court-circuite R 13 - C 11 pendant la durée du réglage).Detection.- Detectors Dr, Dr '... (fig.1) each comprising a resistor in series with contacts are placed in series in a detection loop, constituting with P 2, R 9, R 8 and R 7 a balanced bridge around point a. IC 2 and IC 3 mounted as threshold detectors, one positive and the other negative, cause the bridge to become unbalanced with a low voltage state at point b which establishes a positive voltage on output 3 of IC 4 for one duration limited to about one second by the set R 13 - C 11 playing the timer role. In the event of a detector opening, short circuit (partial or total) or if the detection loop is cut off, the alarm will be triggered and locked for two to three minutes using IC 6 (fig.2). The detection loop can be formed from I to 10 detectors each comprising a resistance of 3.3 kilohms; the resistor R 9 (of 33 kilohms) can itself be replaced by 1 to 10 detectors of 3.3 kilohms (plus an adjustable resistor). A light-emitting diode L 1 makes it possible to control the balance of the bridge by means of P 2 (short-circuited R 13 - C 11 for the duration of the adjustment).
Autocontrôle.— IC 1 est monté en générateur de signaux carrés de fréquence f , égale par exemple à 15 Hz. A chaque période négative, R 8 (de 3,3 kilohms) est court-circuitée pendant une courte durée par T 2 rendu conducteur à travers C 2; inversement, à chaque période positive, R 7 (également de 3.3 kilohms), court-circuitée au repos par T 1, s'ajoute à la résistance totale du pont du fait du blocage momentané de T 1 à travers C 3- Il s'ensuit, par l'action de IC 2 et IC 3, l'apparition au point c de signaux rectangulaires de fréquence 2 f, soit ici de 30 Hz. Ces signaux d'autocontrôlé: sont prélevés par C 19 sur la sortie 3 de IC 6 (point f), c'est-à-dire pratiquement aux bornes du relais d'alarme REL 1 , et appliqués par l'inter- médiaire de T 3 au circuit de contrôle de fréquence formé de IC 7 et IC 8. En cas d'absence ou de fréquence incorrecte des signaux rectangulaires le voyant de marche L 3 s'éteint et le relais REL 2 actionne l'avertisseur sonore de défaut. REL 1 est temporisé par C 17 pour éviter que les signaux d'autocontrôle déclenchent l'alarme.Self-checking.— IC 1 is mounted as a square signal generator with frequency f, for example equal to 15 Hz. At each negative period, R 8 (3.3 kilohms) is short-circuited for a short time by T 2 made conductive through C 2; conversely, at each positive period, R 7 (also 3.3 kilohms), short-circuited at rest by T 1, is added to the total resistance of the bridge due to the momentary blocking of T 1 through C 3- It s' then, by the action of IC 2 and IC 3, the appearance at point c of rectangular signals of frequency 2 f, in this case 30 Hz. These self-controlled signals: are picked up by C 19 on output 3 of IC 6 (point f), that is to say practically at the terminals of the alarm relay REL 1, and applied by means of T 3 to the frequency control circuit formed by IC 7 and IC 8. In in the event of absence or incorrect frequency of the rectangular signals, the operating light L 3 goes out and the REL 2 relay activates the audible fault warning. REL 1 is timed by C 17 to prevent the self-checking signals from triggering the alarm.
Pendant le verrouillage de l'alarme, les signaux d'autocontrôlé sont transmis directement à IC 7 (depuis g) et indiquent, grâce à L 3 et à l'avertisseur sonore le maintien ou la disparition de la cause de l'alarme, c'est-à-dire si le déséquilibre du pont persiste ou non.During the alarm locking, the self-controlled signals are transmitted directly to IC 7 (from g) and indicate, thanks to L 3 and the buzzer, the maintenance or disappearance of the cause of the alarm, c that is, whether the bridge imbalance persists or not.
On peut utiliser le même système d'autocontrôlé en plaçant les détecteurs (comportant une résistance) dans un pont de Wheatstone. Le même procédé peut s'appliquer dans le cas d'une boucle de détection dont la résistance totale est mesurée et mise en mémoire par un microprocesseur, toute variation d'une certaine importance de la valeur mise en mémoire provoquant un changement d'état à la sortie du circuit.The same self-monitoring system can be used by placing the detectors (with a resistor) in a Wheatstone bridge. The same process can be applied in the case of a detection loop whose total resistance is measured and stored in memory by a microprocessor, any variation of a certain importance of the value stored causing a change of state to the output of the circuit.
Autoprotection.- Le générateur de signaux IC 1 est commandé par une boucle d'autoprotection dans laquelle sont placés (en série) les microrupteurs (Sw, Sw' ...) protégeant les différents éléments de l'installation, fermée par le condensateur C 1. La coupure ou le court-circuit de la boucle d'autoprotection provoquent la disparition des oscillations à 15 Hz. Ces signaux sont appliqués par D 3 et C 12, après déphasage par R 17, C 13 et R 16, à l' entrée (2-6) de IC 4 et se retrouvent sous forme d'impulsions brèves au point c. Ces impulsions à 15 Hz sont contrôlées par IC 9, et leur absence provoque l'allumage de L 4 et le déclenchement de l'avertisseur sonore de défaut. La boucle d'autoprotection pourra utilement doubler les lignes d' alimentation, de détection et, en général, les conducteurs reliant les différentes parties de l'installation.Self-protection.- The signal generator IC 1 is controlled by a self-protection loop in which are placed (in series) the microswitches (Sw, Sw '...) protecting the various elements of the installation, closed by the capacitor C 1. The cut or short-circuit of the self-protection loop causes the 15 Hz oscillations to disappear. These signals are applied by D 3 and C 12, after phase shift by R 17, C 13 and R 16, at the entry (2-6) of IC 4 and are found in the form of short pulses at point c. These pulses at 15 Hz are controlled by IC 9, and their absence causes the ignition of L 4 and the triggering of the fault horn. The self-protection loop can usefully double the supply and detection lines and, in general, the conductors connecting the different parts of the installation.
Un contacteur arrêt-marche (K1-K2-K3) permet de mettre l'alarme hors veille et de neutraliser le système d'autocontrôlé, le système d'autopro tection restant seul actif; il permet éventuellement d'interrompre instan tanément la sirène d'alarme.An on / off contactor (K1-K2-K3) enables the alarm to be put out of standby and to neutralize the self-monitoring system, the self-protection system remaining only active; it can be used to instantly interrupt the alarm siren.
Le système d'autocontrôlé et d'autoprotection convient particulièrement à une liaison sans fil entre les différents éléments de l'installation.The self-monitoring and self-protection system is particularly suitable for a wireless link between the various elements of the installation.
Valeurs des éléments.- R 1 : 0,5 mégohm; R 2: 10 kilohms; R 3: 47 kilohms; R 4: 0,47 mégohm; R 5: 10 kilohms; R 6: 0,47 mégohm; R 7, R 8: 3,3 kilohms; R 9: 33 kilohms; R 10, R 11: 4,7 kilohms; R 12: 0,1 mégohm; R 13: 1 mégohm; R 14: 0,47 mégohm; R 15: 10 mégohms; R 16: 1 mégohm; R 17: 0,22 mégohm; R 18: 10 kilohms; R 19: 560 ohms; R 20, R 21 , R 22: 10 kilohms; R 23: 1 mégohm; R 24: 6,8 mègohms; R 25: 1,5 mégohm; R 26: 560 ohms; R 27: 10 kilohms; R 28: 0,1 mégohm; R 29: 0,47 mégohm; R 30, R 31: 10 kilohms; R 32: 3,3 mégohms; R 33: 5, 6 mégohms; R 34: 560 ohms; R-35: 5,6 mégohms; R 36: 3,3 mégohms; R 37: 20 mégohjris; R 38: 560 ohms; P 1 : 0,27 mégohm; C 1 : 0,1 microfarad; C 2, C 3: 0,01 microfarad; C 4: 0,22 microfarad; C 5: 0,1 microfarad; C 6, C7: 0,47 microfaraά; C 8: 0,1 microfarad; C 9, C 10: 6800 picofarads; C 11 : 2,2 microfarads; C 12: 22000 picofarads; C 13: 0,1 microfarad; C 14: 6800 picofarads; C 15: 0,1 microfarad; C 16: 0,47 microfarad; C 17: 470 microfarads; C 18, C19: 15 microfarads; G 20, C 21 , C 22, C 23: 0,1 microfarad; C 24: 150 microfarads; C 25: 0,1 microfarad; C 26: 0,47 microfarad; C 27: 150 microfarads; IC 1 , IC 4, IC 5, IC 6, IC 7: NE 555; IC 2, IC 3, IC 8, IC 9: SFC 2741 ; T 1 , T 2: 2 N 2907; T 3: 2 N 2222; D 1 à D 6: BY 206; D 7, D 8: OA 95; REL 1 : relais 9 volts 320 ohms 4 RT; REL 2, REL 3: relais reed 9 volts 900 ohms.Element values. - R 1: 0.5 megohm; R 2: 10 kilohms; R 3: 47 kilohms; R 4: 0.47 megohm; R 5: 10 kilohms; R 6: 0.47 megohm; R 7, R 8: 3.3 kilohms; R 9: 33 kilohms; R 10, R 11: 4.7 kilohms; R 12: 0.1 megohm; R 13: 1 megohm; R 14: 0.47 megohm; R 15: 10 megohms; R 16: 1 megohm; R 17: 0.22 megohm; R 18: 10 kilohms; R 19: 560 ohms; R 20, R 21, R 22: 10 kilohms; R 23: 1 megohm; R 24: 6.8 megohms; R 25: 1.5 megohm; R 26: 560 ohms; R 27: 10 kilohms; R 28: 0.1 megohm; R 29: 0.47 megohm; R 30, R 31: 10 kilohms; R 32: 3.3 megohms; R 33: 5.6 megohms; R 34: 560 ohms; R-35: 5.6 megohms; R 36: 3.3 megohms; R 37: 20 megohris; R 38: 560 ohms; P 1: 0.27 megohm; C 1: 0.1 microfarad; C 2, C 3: 0.01 microfarad; C 4: 0.22 microfarad; C 5: 0.1 microfarad; C 6, C7: 0.47 microfaraά; C 8: 0.1 microfarad; C 9, C 10: 6800 picofarads; C 11: 2.2 microfarads; C 12: 22000 picofarads; C 13: 0.1 microfarad; C 14: 6800 picofarads; C 15: 0.1 microfarad; C 16: 0.47 microfarad; C 17: 470 microfarads; C 18, C19: 15 microfarads; G 20, C 21, C 22, C 23: 0.1 microfarad; C 24: 150 microfarads; C 25: 0.1 microfarad; C 26: 0.47 microfarad; C 27: 150 microfarads; IC 1, IC 4, IC 5, IC 6, IC 7: NE 555; IC 2, IC 3, IC 8, IC 9: SFC 2741; T 1, T 2: 2 N 2907; T 3: 2 N 2222; D 1 to D 6: BY 206; D 7, D 8: OA 95; REL 1: 9 volt relay 320 ohms 4 RT; REL 2, REL 3: 9-volt reed relay 900 ohms.
La présente invention n'est pas limitée à la seule réalisation décrite ci-dessus à titre d'exemple, mais s'applique également à toutes les variantes et autres formes de réalisations mettant en oeuvre les mêmes procédés, notamment en utilisant des composants différents ou des microprocesseurs. Le dispositif objet de l'invention permet de rendre très stîr le fonctionnement des appareillages et des installations d'alarme, de surveillance, de sécurité, de contrôle, de mesure, etc., en avertissant des pannes, dé-fauts, incidents, sabotages, etc., susceptibles de rendre ces dispositifs inopérants.The present invention is not limited to the single embodiment described above by way of example, but also applies to all the variants and other embodiments implementing the same methods, in particular by using different components or microprocessors. The device which is the subject of the invention makes it possible to make the operation of the apparatus and of the alarm, surveillance, security, control, measurement, etc. operations very secure, by warning of breakdowns, faults, incidents, sabotage. , etc., which could render these devices inoperative.
Ce dispositif, spécialement prévu pour la protection des biens et des locaux contre le vol et l'intrusion, peut également être utilisé pour la détection et la prévention des incendies. Il peut également être adapté à divers autres emplois, notamment dans l'industrie, pour la surveillance médicale, etc. This device, specially designed for the protection of goods and premises against theft and intrusion, can also be used for fire detection and prevention. It can also be adapted to various other uses, in particular in industry, for medical surveillance, etc.

Claims

R E V E N D I C A T I O N S 1. Dispositif électronique d'alarme, de sécurité , de contrôle ou de surveillance caractérisé par le fait qu'un générateur de signaux carrés commandé par une boucle d'autoprotection capacitive produit: a ) des impulsions brèves de contrôle d'autoprotection de fréquence f , b) des signaux rectangulaires d'autocontrôlé de fréquence 2 f , obtenus en provoquant des variations périodiques de la résistance de la boucle de détection, alternativement augmentée et diminuée d'une valeur correspondant à la résistance placée dans chacun des détecteurs. L'absence ou une fréquence incorrecte des signaux d'autocontrôlé (vérifiés aux bornes du relais temporisé d'alarme) , l'absence d' impulsions d'autoprotection (dûe à la coupure ou au court-circuit de la boucle d'autoprotection) sont détectées par deux circuits de contrôle différents et signalées par des voyants et un avertisseur sonore de défaut indépendant de la sirène d'alarme.CLAIMS 1. Electronic alarm, security, control or monitoring device characterized by the fact that a square signal generator controlled by a capacitive self-protection loop produces: a) short pulses of frequency self-protection control f, b) rectangular self-monitoring signals of frequency 2 f, obtained by causing periodic variations in the resistance of the detection loop, alternately increased and decreased by a value corresponding to the resistance placed in each of the detectors. The absence or incorrect frequency of the self-controlled signals (checked at the terminals of the time delay relay), the absence of self-protection pulses (due to the cut or short-circuit of the self-protection loop) are detected by two different control circuits and signaled by LEDs and an audible fault warning independent of the alarm siren.
2. Dispositif selon la revendication 1 caractérisé par le fait que le com mutateur marche-arrêt placé en position arrêt neutralise l'alarme et le système d'autocontrôlé et maintient en fonction le système d'autoprotection. 2. Device according to claim 1 characterized in that the on / off switch placed in the off position neutralizes the alarm and the self-monitoring system and keeps the self-protection system in operation.
PCT/FR1983/000194 1982-10-06 1983-09-29 Self-controlled and self protected alarm device WO1984001456A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8383902995T DE3376702D1 (en) 1982-10-06 1983-09-29 Self-controlled and self protected alarm device
AT83902995T ATE34473T1 (en) 1982-10-06 1983-09-29 SELF-MONITORING AND SELF-PROTECTED ALARM DEVICE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8216842A FR2534396B1 (en) 1982-10-06 1982-10-06 SELF-CONTROLLED AND SELF-PROTECTED ALARM DEVICE

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WO1984001456A1 true WO1984001456A1 (en) 1984-04-12

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Application Number Title Priority Date Filing Date
PCT/FR1983/000194 WO1984001456A1 (en) 1982-10-06 1983-09-29 Self-controlled and self protected alarm device

Country Status (4)

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EP (1) EP0121521B1 (en)
DE (1) DE3376702D1 (en)
FR (1) FR2534396B1 (en)
WO (1) WO1984001456A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2586451B1 (en) * 1985-08-26 1987-12-24 Securite Automatisme Protectio ANTI-BREAKAGE PROTECTION INSTALLATION OF A CLOSED PREMISES

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1574037A (en) * 1968-04-05 1969-07-11
FR2432189A1 (en) * 1978-07-24 1980-02-22 Faget Jean Electronic surveillance alarm system with automatic checking - employs detectors in bridge network receiving periodic control pulses from generator
FR2444306A2 (en) * 1978-12-14 1980-07-11 Faget Jean Electronically pulsed security alarm system - has detectors connected to control pulses to maintain control during test periods
FR2448754A2 (en) * 1979-02-06 1980-09-05 Faget Jean Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1574037A (en) * 1968-04-05 1969-07-11
FR2432189A1 (en) * 1978-07-24 1980-02-22 Faget Jean Electronic surveillance alarm system with automatic checking - employs detectors in bridge network receiving periodic control pulses from generator
FR2444306A2 (en) * 1978-12-14 1980-07-11 Faget Jean Electronically pulsed security alarm system - has detectors connected to control pulses to maintain control during test periods
FR2448754A2 (en) * 1979-02-06 1980-09-05 Faget Jean Resetting system for alarm circuit - uses integrated circuits and time delay for automatic resetting after adjustable time interval

Also Published As

Publication number Publication date
FR2534396A1 (en) 1984-04-13
EP0121521A1 (en) 1984-10-17
FR2534396B1 (en) 1986-05-16
DE3376702D1 (en) 1988-06-23
EP0121521B1 (en) 1988-05-18

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