EP0121521B1 - Selbstüberwachte und selbstgeschützte alarmvorrichtung - Google Patents

Selbstüberwachte und selbstgeschützte alarmvorrichtung Download PDF

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Publication number
EP0121521B1
EP0121521B1 EP19830902995 EP83902995A EP0121521B1 EP 0121521 B1 EP0121521 B1 EP 0121521B1 EP 19830902995 EP19830902995 EP 19830902995 EP 83902995 A EP83902995 A EP 83902995A EP 0121521 B1 EP0121521 B1 EP 0121521B1
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EP
European Patent Office
Prior art keywords
self
protection
alarm
control
frequency
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
Application number
EP19830902995
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English (en)
French (fr)
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EP0121521A1 (de
Inventor
Jean Faget
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT83902995T priority Critical patent/ATE34473T1/de
Publication of EP0121521A1 publication Critical patent/EP0121521A1/de
Application granted granted Critical
Publication of EP0121521B1 publication Critical patent/EP0121521B1/de
Expired legal-status Critical Current

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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 monitoring device comprising self-protection and dynamic self-checking circuits intended to detect any faults, breakdowns or sabotages liable to render the device or the installation inoperative.
  • Patent FR A 2 432 189 describes a method according to which self-checking pulses are caused by brief periodic interruptions of the supply of the Wheatstone bridge in which an R-C assembly is integrated.
  • two different types of signals are produced allowing simultaneous self-monitoring and self-protection of the installation, by means of a square signal generator controlled by a capacitive self-protection loop, from which one obtains, on the one hand, short self-protection control pulses (of frequency f) and, on the other hand, rectangular self-control signals (of frequency 2 f), caused by periodic variations in the resistance of the loop detection, 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-checking signals (checked at the terminals of the time delay alarm relay), the absence of pulses tamper (due to the cut-out or short-circuit of the tamper loop) are detected by two different control circuits and signaled by LEDs and an audible fault warning independent of the alarm siren.
  • 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 malfunctions or possible incidents and to produce the various actions necessary in the event of an alarm: triggering of sirens, switching on of the lighting, switching on of cameras, etc.
  • the output c of module A is connected to the input d of module B, either directly or by any wireless connection method.
  • the detectors De, De '... ( Figure 1), each comprising a resistor in series with contacts, are placed in series in a detection loop constituting with P2, R9, R8 and R7 a balanced bridge around point a.
  • IC2 and IC3 mounted as threshold detectors, one positive and the other negative, cause the bridge to become unbalanced at low voltage at point b which establishes a positive voltage on output 3 of IC4 for a period limited to about a second by the set R13-C11 playing the role of timer. If a detector is opened, a short-circuit (partial total) or the detection loop is cut off, the alarm will be triggered and locked for two to three minutes using IC6 (figure 2).
  • the detection loop can be formed from 1 to 10 detectors each comprising a resistance of 3.3 kilohoms; the resistor R9 (of 33 kilohms) can itself be replaced by 1 to 10 detectors of 3.3 kilohms (plus an adjustable resistor).
  • a light-emitting diode L1 makes it possible to control the balance of the bridge by means of P2 (there is a short circuit R13-C11 for the duration of the adjustment).
  • IC1 is mounted as a square signal generator with frequency f, for example equal to 15 Hz.
  • R8 3.3 kilohms
  • T2 made conductive through C2
  • R7 also 3.3 kilohms
  • T1 is added to the total resistance of the bridge due to the momentary blocking of T1 through C3. It follows, by the action of IC2-IC3, the appearance at point c of rectangular signals of frequency 2f, ie here 30 Hz.
  • the self-checking signals are transmitted directly to IC7 (from g) and indicate, thanks to L3 and the buzzer, the maintenance or disappearance of the cause of the alarm, ie that is, whether the bridge imbalance persists or not.
  • the same self-checking system can be used by placing the detectors (comprising a resistor) in a Wheatstone bridge.
  • the same method 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 memorized value causing a change of state at the output of the circuit.
  • the signal generator IC1 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 C1. Cutting or short-circuiting the self-protection loop causes the 15 Hz oscillations to disappear. These signals are applied by D3 and C12, after phase shift by R16, C13 and R17, at the input (2-6) of IC4 and are found in the form of short pulses at point c. These 15 Hz pulses are controlled by IC9, and their absence causes L4 to come on and trigger 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 deactivated and neutralizes the self-monitoring system, the self-protection system remaining active only; it can be used to instantly interrupt the alarm siren.
  • This self-monitoring and self-protection system is particularly suitable for a wireless link between the various elements of the installation.
  • the device which is the subject of the invention makes it possible to make the operation of the apparatuses and of the alarm, surveillance, security, control and measurement systems very secure, by warning of breakdowns, faults, incidents, sabotage, etc., liable to 'affect their effectiveness. Specially designed to protect premises and property against intrusion and theft, it can also be used for fire detection. It can be adapted to various other uses, in particular in industry, for medical surveillance, etc.
  • R1 0.5 megohm; R2: 10 kilohms; R3: 47 kilohms; R4: 0.47 megohm; R5: 10 kilohms; R6: 0.47 megohm; R7, R8: 3.3 kilohms; R9: 33 kilohms; R10, R11: 4.7 kilohms; R12: 0.1 megohm; R13: 1 megohm; R14: 0.47 megohm; R15: 10 megohms; R16: 1 megohm; R17: 0.22 megohm; R18: 10 kilohms; R19: 560 ohms; R20, R21, R22: 10 kilohms; R23: 1 megohm; R24: 6.8 megohms; R25: 1.5 megohm; R26: 560 ohms; R27: 10 k

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

Claims (2)

1. Elektronische Alarmanlage zur Sicherheit, Kontrolle und überwachung, dadurch charakterisiert, daß man zwei verschiedene Signale erzeugt, die imstande sind, die Gesamtanlage durch Selbstkontrolle und Selbstschutz zu schützen durch Einsetzen eines Generators für viereckige Signale (IC1), der von einer kapazitiven Selbstschutzschleife gesteuert wird (Sw, Sw', C1), und der einerseites kurze Selbstkontrollimpulse (mit Frequenz f) andererseits rechteckige Selbstprüfsignale (mit Frequenz 2f) gibt, die von periodischen Variationen im Widerstand der Prüfschleife erzeugt werden (De, De'), welcher abwechselnd um einen dem in die jeweiligen Detektoren festgelegten Widerstand entsprechenden Intensitätswert gesteigert oder gemindert wird: Die Abwesenheit oder die unpassende Frequenz der Selbstkontrollsignale, die and den Klemmen des Zeitverzögerungsalarmrelais erkannt werden (REL1), die Abwesendheit von Selbstchutzsignalen, die von der Trennung oder dem Kurzschluß der Selbstschutzchleife verursacht werden, werden von zwei verschiedenen Prüfkreisen detektiert, und von Leuchtern (IC7, IC8; IC9) sowie von einer Defektalarm (L3, L4) angezeigt, welche unabhängig von der Warnhupe funktioniert.
2. Anlage, der Patentmeldung 1 gemäß, dadurch charakterisiert daß ein auf Auschalten gestellter Schalter (K1, K2, K3) die Alarm und das Selbstprüfsystem neutralisiert und das Funktioniern des Selbstschutzsystemes aufrechterhält.
EP19830902995 1982-10-06 1983-09-29 Selbstüberwachte und selbstgeschützte alarmvorrichtung Expired EP0121521B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83902995T ATE34473T1 (de) 1982-10-06 1983-09-29 Selbstueberwachte und selbstgeschuetzte alarmvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216842A FR2534396B1 (fr) 1982-10-06 1982-10-06 Dispositif d'alarme autocontrole et autoprotege
FR8216842 1982-10-06

Publications (2)

Publication Number Publication Date
EP0121521A1 EP0121521A1 (de) 1984-10-17
EP0121521B1 true EP0121521B1 (de) 1988-05-18

Family

ID=9278071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830902995 Expired EP0121521B1 (de) 1982-10-06 1983-09-29 Selbstüberwachte und selbstgeschützte alarmvorrichtung

Country Status (4)

Country Link
EP (1) EP0121521B1 (de)
DE (1) DE3376702D1 (de)
FR (1) FR2534396B1 (de)
WO (1) WO1984001456A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2586451B1 (fr) * 1985-08-26 1987-12-24 Securite Automatisme Protectio Installation de protection anti-effraction d'un local ferme

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1574037A (de) * 1968-04-05 1969-07-11
FR2432189A1 (fr) * 1978-07-24 1980-02-22 Faget Jean Dispositif d'alarme electronique
FR2444306A2 (fr) * 1978-12-14 1980-07-11 Faget Jean Dispositif d'alarme electronique
FR2448754A2 (fr) * 1979-02-06 1980-09-05 Faget Jean Dispositif d'alarme electronique

Also Published As

Publication number Publication date
FR2534396A1 (fr) 1984-04-13
WO1984001456A1 (fr) 1984-04-12
EP0121521A1 (de) 1984-10-17
DE3376702D1 (en) 1988-06-23
FR2534396B1 (fr) 1986-05-16

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