EP0128549A1 - Installation d'alarme - Google Patents

Installation d'alarme Download PDF

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Publication number
EP0128549A1
EP0128549A1 EP84106565A EP84106565A EP0128549A1 EP 0128549 A1 EP0128549 A1 EP 0128549A1 EP 84106565 A EP84106565 A EP 84106565A EP 84106565 A EP84106565 A EP 84106565A EP 0128549 A1 EP0128549 A1 EP 0128549A1
Authority
EP
European Patent Office
Prior art keywords
alarm
signal
output
input
switched
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.)
Granted
Application number
EP84106565A
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German (de)
English (en)
Other versions
EP0128549B1 (fr
Inventor
Harald Steinbrucker
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.)
Alfasystem Vertrieb Von Elektronischen Sicherheitssystemen GmbH
Original Assignee
Alfasystem Vertrieb Von Elektronischen Sicherheitssystemen GmbH
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.)
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Publication date
Application filed by Alfasystem Vertrieb Von Elektronischen Sicherheitssystemen GmbH filed Critical Alfasystem Vertrieb Von Elektronischen Sicherheitssystemen GmbH
Priority to AT84106565T priority Critical patent/ATE30279T1/de
Publication of EP0128549A1 publication Critical patent/EP0128549A1/fr
Application granted granted Critical
Publication of EP0128549B1 publication Critical patent/EP0128549B1/fr
Expired legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/14—Central alarm receiver or annunciator arrangements
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
    • 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
    • G08B29/10—Monitoring of the annunciator circuits

Definitions

  • the invention relates to an alarm system according to the preamble of claim 1.
  • alarm signals are supplied from different notification levels, in which the alarm signals are evaluated depending on the selected operating state of the system and according to their importance and are passed on to different alarm transmitter levels and / or alarm memory levels . If, in these known alarm systems, an alarm is triggered by a signaling level, that because of the persistence of the cause of the message or because of a fault Continues to give an alarm signal, this leads to a permanent alarm. During this permanent alarm, the triggering of an alarm by other alarm levels is blocked. Other alarm messages can therefore only be recorded if the originally triggering signaling level is switched off or the fault or cause of the signal is remedied there. In such a case, since these processes require manual intervention, the system is "blind" to other messages for a certain time.
  • the invention has for its object to provide an alarm system according to the preamble of claim 1, in which the duration of operating conditions in which an alarm signal recording is prevented is automatically reduced to a minimum.
  • a timer is inserted into the signal path for the alarm signals, which automatically makes a distinction between “real” and “fake” alarm signals for the transmission of an alarm signal, namely between alarm signals still to be triggered and ongoing alarm signals that have already been recorded.
  • This is done in that an alarm signal which arrives when the timer is in the ready state brings about the alarm state in which the alarm signal is passed on.
  • the relayed alarm signal brings about an idle state of the timer, in which it no longer emits an alarm signal.
  • the timer only resumes its ready state from the idle state when there is no longer an alarm signal at the input. This ensures that an incoming alarm signal is passed on, but its continuation does not block a subsequent stage.
  • the "blind time” of the system caused by an alarm signal is automatically reduced to a minimum compared to other signals, which increases the reliability of the entire system.
  • the timer element designed in this way is particularly advantageous if it is used in the alarm system according to the invention, depending on its configuration, level structure, etc., for decoupling respective sections or levels. It is thereby achieved that without a manual reset, no alarm signals which have been triggered once impair the subsequent function of the alarm system in the sense that newly emerging alarm signals are ignored and are not recorded or stored. Furthermore, the timer switching elements working in the manner described above make it possible to "arm" an extensive alarm system without first checking or peeling all the system parts in question for their alarm-free normal state. This is made possible in the alarm system according to the invention in that a respective time switch element is put into the ready state leading to the alarm being emitted only when the input alarm signal is no longer present.
  • switching a respective time switch to the idle state, in addition to the output alarm signal, by means of a system switching signal generated briefly when the system is switched on or off, is particularly advantageous if a stage which is also switched on or off before reaching a stable operating state goes through various undefined operating states.
  • Such Settling processes could cause an alarm signal to be eliminated and a subsequent alarm signal to be produced, which is effectively suppressed by the corresponding system switching signal.
  • FIG. 1 schematically shows an alarm system designated overall by 1.
  • the alarm system 1 shown has a quiescent current detection level 2 with an opening detector loop 3, a motion detection level 4 with an infrared motion detector 5, a sabotage notification level 6 with a quiescent current conductor loop 7 and an emergency call detection level 8 with an emergency call detector 9
  • the messages from these message levels are evaluated in an evaluation level 10 in accordance with a program selected by means of a program setting level 11 in the sense that they lead to an alarm being issued, in connection with a time indication or in their chronological sequence, are merely registered as "present""appear or the like.
  • FIG. 1 schematically shows an alarm system designated overall by 1.
  • the alarm system 1 shown has a quiescent current detection level 2 with an opening detector loop 3, a motion detection level 4 with an infrared motion detector 5, a sabotage notification level 6 with a quiescent current conductor loop 7 and an emergency call detection level 8 with an emergency call detector 9
  • the messages from these message levels are evaluated in an evaluation level 10 in
  • FIG. 1 shows an internal alarm stage 12, to which, for example, a buzzer 13 and a light indicator 14 are connected, an external alarm stage 15, to which a horn or siren 16 and an outside Flashing light 17 are connected, and an alarm storage stage 18 with displays 19 on which triggers are displayed, if necessary by means of digital displays with simultaneous designation of the reporting location, the time, the time sequence and / or the frequency.
  • a mechanical arming key switch 20 is connected to the program setting stage 11, with which the system can be armed to emit certain types of alarm.
  • the program setting stage 11 is also connected to an infrared receiving / transmitting circuit 21, which is designed for infrared signal transmission via a diode combination 22 comprising a photodiode and a light-emitting diode.
  • the setting stage 11 can thus be switched or called up via the receive / transmit circuit 21 by means of a remote control unit 23 which is connected to the receive / transmit circuit via a diode combination 24.
  • time switches 25-1 to 25-8 are connected between the respective stages in the signal path for alarm signals or signals leading to alarms.
  • These timer elements 25 have the function of forwarding an incoming alarm signal for a certain adjustable time under the condition that the timer element has previously assumed a ready state due to the absence of the input alarm signal.
  • this is done in that the timer 25 is switched by an incoming alarm signal from the ready state to an alarm state in which the timer sends an alarm signal or the alarm signal.
  • the timer and the relayed or given alarm signal from the alarm state is switched to an idle state with a certain adjustable delay, the alarm signal delivery being ended. From the idle state, the time switch is only switched to the standby state, if the entered alarm signal is omitted. The timer can therefore only pass on an alarm signal again when it is switched from the idle state to the ready state due to the absence of the alarm signal.
  • this function of the respective time switch 25 is additionally used in the sense that the idle state of the time switch is forcibly brought about by means of a system switch signal, which is generated when switching on or switching over in the system for a specific one Time period at a stage upstream of the relevant time switch element an unstable operating state is to be expected, in which the signal emitted by the stage in question is random and does not correspond to the actual circumstances.
  • a voltage monitoring circuit 26 is shown as a source for such a system switching signal, which is connected to a power supply unit 27 and an emergency battery 28 and which, after a brief failure or drop in the supply voltage to the system, outputs system switching signals with a duration to the respective timer elements is longer than the duration of the unstable state of the stage preceding the timer element concerned. This ensures that the ready state of the timer and thus its alarm signal transmission is only possible when the alarm signal caused by a fault or a permanent cause of the message no longer occurs at the stage that is already operating in the stable operating state.
  • Such a system switching signal can also be generated, for example, during an arming process, which makes it possible to arm the remaining part of the system despite the presence of a continued alarm signal from a faulty stage.
  • Another case Game consists in entering a command for generating a system switching signal via the remote control unit 23, the receiving / transmitting circuit 21 and the program setting stage, with corresponding encryption, with which the idle state of a timer 25 behind a signaling stage is brought about for a certain time, with which a Input or output is secured.
  • FIG. 2 shows an embodiment of the timer element 25 of the alarm system 1.
  • the timer element 25 according to this embodiment is constructed with an RS flip-flop from NAND elements N1 and N2, which has a set input S, a reset input R and a set output Q.
  • the set input S is connected to the alarm signal output of a preceding stage, while the set output Q determines the output alarm signal of the timer via a transistor T1.
  • a capacitor C1 is connected to the reset input R, the charging or discharging of which determines the switching sequence of the timer. According to the FIG.
  • the time switch is connected downstream of a stage which is schematically indicated with a resistor R4 and a transistor T5 and which normally emits a high level signal and generates a low level signal as an alarm signal, which is illustrated by a normally closed contact connected via the lines shown in broken lines .
  • a stage which is schematically indicated with a resistor R4 and a transistor T5 and which normally emits a high level signal and generates a low level signal as an alarm signal, which is illustrated by a normally closed contact connected via the lines shown in broken lines .
  • the preceding stage emits the normal signal with the high level and that the timer is in the ready state.
  • the capacitor C1 is charged to the high level, so that the reset input R, like the set input S and also the set output Q, each have a high level, while at the second input of the NAND gate N2 low level is present.
  • the capacitor Cl is discharged via a variable resistor P connected between the set output Q and the reset input R, so that its charging voltage from the initially high level to a threshold value is lowered, at which the NAND gate N2 switches over again, so that the set output Q again assumes the high level.
  • the low level at the reset input R is further maintained in that a discharge circuit is formed by the high level at the set output Q via a transistor T4 for the capacitor Cl, in which a diode 2, a wide: stand R2, a transistor T3 and the transistor T4 are connected in series.
  • the transistor T3 is switched through by the input alarm signal via a transistor T2, the base of which receives a low level via a resistor R3, while when there is no alarm signal it receives a high level, by means of which the transistor T2 and also the transistor T3 are blocked.
  • a series circuit leading to the capacitor Cl is also connected, consisting of a resistor R1 and a diode D1, but the resistor R2 of the discharge circuit is dimensioned such that the level at the reset input R is below of the threshold is held.
  • the timer therefore assumes the idle state, in which it no longer emits an output alarm signal, although the input alarm signal is still present. If the input alarm signal is no longer present, the set input S takes the high level, through which transistor T3 is also blocked via transistor T2, so that the discharge circuit D2, R2, T3, T4 is switched off.
  • the second input of the NAND gate N2 now assumes the low level, by which the high level of the set output Q is maintained.
  • the capacitor C1 is quickly charged via the series circuit comprising the resistor R1 and the diode D1, so that the reset input R now receives the high level again and the standby state is thus reached again.
  • the resistance value of the resistor R1 is chosen to be low in comparison to that of the variable resistor P serving as a discharge resistor, so that the achievement of the standby state is primarily determined by the resistor R1. If necessary, a diode which is polarized opposite to the diode D1 can be connected in series with the variable resistor P, as a result of which there is no mutual influence on the time constants for charging and discharging.
  • FIG. 2 also shows a diode D3 connected to the capacitor C1, to which a low level is applied as a system switching signal, in order to thereby discharge the capacitor C1 regardless of the existing state and thus to bring about the idle state of the timer.
  • a diode D3 connected to the capacitor C1, to which a low level is applied as a system switching signal, in order to thereby discharge the capacitor C1 regardless of the existing state and thus to bring about the idle state of the timer.
  • a constant output signal is not to be expected from the motion detection stage 4 until after it has been switched on, after about half a minute, so that the timer switch 25-2 connected downstream of this detection stage expediently receives a system switching signal for half a minute after it has been switched on. If a room secured by the alarm system 1 or certain steps thereof is to be entered or left without the arming status of the entire system being interrupted, a system switching signal with the duration required for entering or leaving is to be applied to the relevant timer elements. This ensures that the resulting blind time of the relevant notification levels is reduced to a minimum and that all other notification levels can issue their alarm messages without interruption.
  • FIG. 3 schematically shows an example of an opening detection stage with detectors M1 to M3, which are also provided with loop-through test contacts.
  • the signaling stage is constructed with NAND elements N3 and N4, a resistor network R5 to R10 and a delay element C2 and R9. Details of the dimensioning are not explained here, since it is only important in connection with the timing switch 25 that in the normal state at the output of the NAND gate N4 there are low levels and thus at the collector of the transistor T5 high levels, while in the event of an alarm due to high levels Level at the output of the NAND gate N4, the transistor T5 is blocked and the signaling stage at the output shows a low level.
  • Figure 1 shows the alarm system 1 only schematically, so that many details of the design are omitted from the illustration.
  • the remote control unit 23 together with the receive / transmit circuit 21 can also be used to operate any other house system such as an air conditioning system, heating system or the like.
  • the output display units are only shown schematically.
  • the alarm system 1 it is possible with the alarm system 1 to display the respective switching states of all stages and timer elements on a light-emitting diode field or to supply such displays together with time information, information about a reporting location or the like via a suitable interface to a home computer or to make them visible on a home television set.
  • the time switch elements 25 used in the alarm system 1 make it possible to process precisely defined alarm signals which are adapted to the respective purposes. Any malfunctions that occur are limited both in terms of time and in terms of their effects on other system parts, so that the reliability of the entire system is improved.
  • An alarm system is specified with at least one signal path for alarm signals, which leads at least via a signaling stage, an evaluation stage and an alarm transmitter / alarm memory stage, and into which at least one timer is connected, which is delayed from a ready state by an input alarm signal an alarm state is switchable, in which an output alarm signal is emitted, from the alarm state delayed by the output alarm signal can be switched to an idle state in which no output alarm signal is emitted, and can be switched from the idle state to the ready state by the absence of the input signal at which no output alarm signal is given.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
EP84106565A 1983-06-10 1984-06-08 Installation d'alarme Expired EP0128549B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106565T ATE30279T1 (de) 1983-06-10 1984-06-08 Alarmanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3321078 1983-06-10
DE3321078A DE3321078C2 (de) 1983-06-10 1983-06-10 Alarmanlage

Publications (2)

Publication Number Publication Date
EP0128549A1 true EP0128549A1 (fr) 1984-12-19
EP0128549B1 EP0128549B1 (fr) 1987-10-14

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EP84106565A Expired EP0128549B1 (fr) 1983-06-10 1984-06-08 Installation d'alarme

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EP (1) EP0128549B1 (fr)
AT (1) ATE30279T1 (fr)
DE (1) DE3321078C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717382A1 (fr) * 1994-12-17 1996-06-19 ABBPATENT GmbH Dispositif de détection de mouvement
EP0738644A1 (fr) * 1995-04-19 1996-10-23 Stein GmbH Poste avertisseur pour aller les personnes dans la zone de voie ferrée

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331592A1 (de) * 1973-06-20 1975-01-09 August Woerl Alarmanlage
DE2622142A1 (de) * 1976-05-19 1977-11-17 Hirschmann Radiotechnik Alarmabschaltung fuer meldeanlagen
US4164736A (en) * 1978-03-23 1979-08-14 Napco Security Systems, Inc. Apparatus for disabling an alarm after a predetermined operating period

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1441449B1 (de) * 1962-07-09 1971-12-30 Isi Inc Stoerungsmelder
DE1164885B (de) * 1962-07-20 1964-03-05 Ernst Heinkel Flugzeugbau G M Anzeigevorrichtung mit mehreren parallel ueber zugeordnete Signalschalter an eine Gleichspannungsquelle geschalteten Einzelsignalgebern
DE1238366B (de) * 1964-09-25 1967-04-06 Licentia Gmbh Gleichspannungsgespeiste UEberwachungs- oder Alarmanlage
DE1257833B (de) * 1965-03-27 1968-01-04 Telefunken Patent Gegen Stoerimpulse unempfindliche Schaltungsanordnung zur Erzeugung eines Impulses

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331592A1 (de) * 1973-06-20 1975-01-09 August Woerl Alarmanlage
DE2622142A1 (de) * 1976-05-19 1977-11-17 Hirschmann Radiotechnik Alarmabschaltung fuer meldeanlagen
US4164736A (en) * 1978-03-23 1979-08-14 Napco Security Systems, Inc. Apparatus for disabling an alarm after a predetermined operating period

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717382A1 (fr) * 1994-12-17 1996-06-19 ABBPATENT GmbH Dispositif de détection de mouvement
EP0738644A1 (fr) * 1995-04-19 1996-10-23 Stein GmbH Poste avertisseur pour aller les personnes dans la zone de voie ferrée

Also Published As

Publication number Publication date
ATE30279T1 (de) 1987-10-15
DE3321078C2 (de) 1986-01-23
DE3321078A1 (de) 1984-12-13
EP0128549B1 (fr) 1987-10-14

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