EP0179248A1 - Annunciator identification arrangement in an alarm system - Google Patents

Annunciator identification arrangement in an alarm system Download PDF

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Publication number
EP0179248A1
EP0179248A1 EP85111427A EP85111427A EP0179248A1 EP 0179248 A1 EP0179248 A1 EP 0179248A1 EP 85111427 A EP85111427 A EP 85111427A EP 85111427 A EP85111427 A EP 85111427A EP 0179248 A1 EP0179248 A1 EP 0179248A1
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EP
European Patent Office
Prior art keywords
current
detector
annunciator
ipz
pulse
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Granted
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EP85111427A
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German (de)
French (fr)
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EP0179248B1 (en
Inventor
Peer Dr. Ing. Thilo
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Siemens AG
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Siemens AG
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Priority to AT85111427T priority Critical patent/ATE43733T1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/001—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel
    • G08B26/002—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel only replying the state of the sensor
    • 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
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop

Definitions

  • the invention relates to a device for detector identification in a hazard alarm system, in particular a fire alarm system, according to the preamble of claim 1.
  • Detector identification is easily possible in modern hazard detection systems, such as are known, for example, from pulse mechanical technology (DE-PS 2533382). However, such alarm systems use special detectors and control panels, so that a complete retrofitting of existing systems would be required. In many cases, however, there is a desire to supplement existing systems at least in part so that individual detectors can be identified.
  • Hazard detection systems with detector identification are known per se. However, they generally require specially designed detectors, the addresses of which must be coded in the individual detector for identification. Corresponding, often quite complex evaluation devices in the control center can then determine and display the address of the detector in question from the code transmitted or queried by the detector.
  • Retrofitting an existing system requires not only retrofitting in the control center, but also specially designed detectors that are equipped with a codable addressing device. These measures disadvantageously cause high costs. It is therefore an object of the invention to provide retrofittable additional circuit arrangements for the individual detectors and for the control center for existing hazard detection systems, such as those which the applicant has been selling for years, which allow simple and reliable detector identification, without a significant retrofitting existing reporting arrangement would be required.
  • the device according to the invention for detector identification in a hazard alarm system consists of simple additions and can advantageously also be retrofitted in existing systems without influencing the original functions.
  • the device has additional detector circuit arrangements which are each assigned to a detector and together with the detector each form a detector unit. Furthermore, it has a detector identification circuit arrangement, ie it is assigned to the central unit of the evaluation device and monitors the line current with a current measuring device.
  • the additional detector circuit arrangement has a controllable switching element which shades through the increased current flow caused by the alarm-triggering detector and that from the central unit emitted current pulses on the one hand can reach the detector display and on the other hand feeds a pulse divider. This pulse divider can be set to a certain division ratio, so that an address can be set for the associated detector.
  • the pulse divider With the first current pulse from the control center, the pulse divider is reset to its starting position, with the further current pulses it continues to its set value.When this set value is reached, a current reducing device is activated from the output of the pulse divider, which is arranged in the connection branch of the detector and the current flow to Alarm-triggering detectors reduced in a defined manner
  • the current measuring device in the detector identification circuit detects the current pulse which is reduced in its current value.
  • the current pulses given by the control center to the signal line are counted up to the reduced current pulse so that the alarm triggering detector can be determined and displayed.
  • an analog-to-digital converter is expediently connected to the current measuring device, to which the measured values of the monitored line current are fed.
  • FIG. 1 A circuit arrangement according to the invention for an avoidance additive for detector identification is shown in FIG. 1.
  • the detector add-on circuit arrangement MZS forms with the associated detector M1 a detector unit ME1, which is connected via terminals 1 and 4 to the avoidance line ML.
  • the notification line ML to which the line voltage UL lies, is connected to the control center Z, not shown here.
  • the M1 detector is connected to terminals a and d.
  • the terminals 1, a are positive with respect to the terminals 4, b and 5.
  • the terminals 4 and 5 are connected through, so that the next detector unit i t ME2 is connected to the main line ML at terminals 1 and 5
  • the line voltage UL which can be 20 volts, for example, is present between terminals 1 and 4.
  • the line current IL is, for example, 5 mA in the idle state and consists of the monitoring current through a terminating resistor at the end of the main line ML (not shown here) and the sum of the supply currents of all detector units ME1, ME2 etc.
  • the detector carries an increased current, which is limited to 10 mA in the control center so that an alarm is recognized due to the voltage dip on the detection line.
  • the control center then increases, for example, the current supply to, for example, 100 mA every second, so that current pulses (IPZ) with this limit value are transmitted to the signal line ML.
  • IPZ current pulses
  • a resistor R11 is arranged, through which the increased current flows.
  • the LED is switched on via the resistor R8 connected upstream of the LED MA.
  • a voltage is applied to terminal 6 via resistor R9, to which, for example, a parallel display can be connected.
  • the voltage reached with the central current pulse (IPZ) via the transistor TR1 at the terminal 6 is passed through the diode D and supplied to the pulse divider IPT directly as a supply voltage and on the other hand via the differentiator C1, R1 to the reset input R of the pulse divider IPT.
  • the voltage at terminal 6 goes directly to the C input of the pulse divider.
  • the divider ratio of the pulse divider IMT is set to a value corresponding to the address of the Meider via switches S1 to Sn.
  • the capacitor CV is used for power supply in the pulse pauses in which there is no voltage at terminal 6
  • the pulse divider IPT is set via the differentiating element C1, R1 via the reset input R into the initial layer.
  • the pulse divider IPT is switched on via clock input C by the voltage pulses applied to terminal 6. If the division number reaches the set number, the output will Q the second transistor TR2 blocked via a further differentiating element R2, C2.
  • the pulse divider IPT is reset to the initial state in a manner not described in detail. This is caused by the internal property of the IC circuit of the pulse divider IPT. In this way, the process from vome begins. This enables the detector address determined in the control center to be checked and thus reliably recognized even in the event of malfunctions due to the repeated repetition of the measurement.
  • a detector identification circuit arrangement is assigned to the evaluation device and inserted into the detection line.
  • This avoidance identification circuit arrangement monitors the line current of the signaling line and, in the event of an alarm, also counts the central current impulses.
  • the detector identification shade arrangement recognizes the current pulse with reduced current flow and thus the number of the alarm-triggering detector. This number is displayed, for example, on a two-digit 7-segment display. Together with the existing display of the alarm-triggering detector line, the avoider in question can be clearly identified.
  • a detector identification circuit arrangement MIS is shown in FIG. 2. At points 7 and 8, the common supply voltage UV of e.g. 24 volts connected. All of the evaluation devices AWE of the individual signaling lines ML, which are not shown here and are common in the known systems, are fed from the terminals 7 'and 9, in which the specific voltage and current values described above are generated.
  • the line current IL flows through a measuring resistor RM arranged in the wire 8-9 of the signal line ML and is in this embodiment as a voltage drop across the operational amplifier OV, the amplification of which is instilled with the resistors R3 and R4, the input E of the analog-digital converter AD supplied Via the further input F, the analog-to-digital converter AD is caused by the microcomputer MR, which is acted upon by the current pulses IPZ (flashing pulse) at its input B, for the correct determination of the pulse current magnitude multipole output QW the digitized current size to the microcomputer MR.
  • IPZ flashing pulse

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)

Abstract

1. Annunciator identification arrangement in an alarm system, especially a fire alarm system, having several two-wire annunciation circuits (ML), which are monitored on closed circuit and are connected to an evaluation device (AWE) at a control centre (Z) and to which several annunciators (M1, M2,...) are connected in each case, an alarm-triggering annunciator causing a voltage dip in the line voltage (UL) concerned by virtue of limiting the line current (IL) from the control centre to a first current limiting voltage, and an alarm annunciation of the annunciation circuit (ML) concerned being derived therefrom in the control centre (Z), and the control centre (Z) sending current pulses (IPZ) with a second, increased current limiting value to the annunciation circuit (ML) concerned, the alarm-triggering annunciator causing an increased current flow on the annunciation circuit, characterized in that an annunciator supplementary circuit arrangement (MZS) is assigned to each annunciator (M1, M2,...) and together with the annunciator composes an annunciator unit (ME1, ME2,...), in that the annunciator suplementary circuit arrangement (LZS) has an annunciator display (MA) connected to the annunciator circuit (ML) via a controllable switching element (TR1), a pulse divider (IPT) to which the current pulses (IPZ) are applied, and the divider ratio of which can be adjusted by means of switches (S1-Sn) in order to form an annunciator address, and a current reducing device (SRE) arranged in the annunciator connecting branch (1-a) and capable of being triggered by the pulse divider (IPT), the annunciator display (MA) of the alarm-triggering annunciator being switched in with each current pulse (IPZ), and the pulse divider (IPT) being switched further into its original state with the first current pulse (IPZ) and as far as its preset value with each further current pulse (IPZ), and the pulse divider (IPT) further delivering a control signal to the current reducing device (SRE) upon reaching its preset value, and in that there is arranged in the control centre (Z) of the evaluation device (AWE) an annunciator identification circuit arrangement (MIS), which has a current measuring device (SME) for monitoring the line current (IL), an analog-digital converter (AD), to the first input (E) of which the measured line current is applied, and a microcomputer (MR) downstream of the analog-digital converter (AD) with a display device (ANZ) for the annunciator address, the digitised current values being fed from the output (QW) of the analog-digital converter (AD) to the microcomputer (MR), which is connected with a further input (F) of the analog-digital converter (AD) on the one hand, and to which are applied the current pulses (IPZ) of the increased line current (flashing rate), on the other hand, it being the case, further, that the current pulses (IPZ) are counted up to the current-reduced pulse and the address of the alarm-triggering annunciator is derived therefrom and displayed.

Description

Die Erfindung bezieht sich auf eine Einrichtung zur Melderidentifizierung in einer Gefahrenmeldeniage, insbesondere Brandmeldeanlage, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a device for detector identification in a hazard alarm system, in particular a fire alarm system, according to the preamble of claim 1.

Bei bekannten Gefahrenmeldeanlagen können bis zu 30 Melder an einer Zweidraht-Meldeleitung angeschlossen sein. Löst ein Melder Alarm aus, so wird in der Zentrale die betreffende Meldeieitung angezeigt In zunehmenden Maße besteht jedoch der Wunsch, auftretende Alarme oder sonstige Ereignisse, wie z.B. Störungen durch Leitungsbruch oder Kurzschluß, genauer lokalisieren zu können. Daher wurden Gefahrenmeldeanlagen geschaffen die eine Einzelidentifizierung der Melder ermöglichen.In known danger detection systems, up to 30 detectors can be connected to a two-wire detection line. If a detector triggers an alarm, the relevant message line is displayed in the control center. However, there is an increasing desire to trigger alarms or other events, such as Faults due to wire break or short circuit to be able to localize more precisely. For this reason, hazard alarm systems have been created that enable the detectors to be identified individually.

In modernen .Gefahrenmeldeanlagen, wie sie beispielsweise aus der Pulsmekietechnik (DE-PS 2533382) bekannt sind, ist die Melderidentifizierung ohne weiteres möglich. Derartige Meldeanlagen verwenden jedoch spezielle Melder und Zentralen, so daß eine völlige Umrüstung bestehender Anlagen erforderlich wäre. Vielfach beseht jedoch der Wunsch, betehende Anlagen zumindest teilweise so zu ergänzen, daß einzelne Melder identifizert werden können. Gefahrenmeldeanlagen mit Melderidentifizierung sind an sich bekannt Sie erfordern jedoch im allgemeinen besonders ausgestaltete Melder, deren Adresse zur Identifizierung jeweils im einzelnen Melder codiert werden muß. Entsprechende, vielfach recht aufwendige Auswertennninrichtungen in der Zentrale können dann bei Alarmgabe aus dem vom Melder übertragenen oder abgefragten Code die Adresse des betreffenden Melders ermitteln und anzeigen.Detector identification is easily possible in modern hazard detection systems, such as are known, for example, from pulse mechanical technology (DE-PS 2533382). However, such alarm systems use special detectors and control panels, so that a complete retrofitting of existing systems would be required. In many cases, however, there is a desire to supplement existing systems at least in part so that individual detectors can be identified. Hazard detection systems with detector identification are known per se. However, they generally require specially designed detectors, the addresses of which must be coded in the individual detector for identification. Corresponding, often quite complex evaluation devices in the control center can then determine and display the address of the detector in question from the code transmitted or queried by the detector.

Eine Umrüstung einer bestehenden Anlage erfordert neben der Umrüstung in der Zentrale eigens dafür konzipierte Melder, die mit einem codierbaren Adressiereirichtung ausgerüstet sind. Diese Maßnahmen verursachen in nachteiliger Weise einen hohen Kostenaufwand. Aufgabe der Erfindung ist es daher für bestehende, eingangs geschilderte Gefahrenmekieanlagen, wie sie beispielsweise seit Jahren vom Anmelder vertrieben werden, nachrüstbare Zusatzschaitungsanordnungen für die einzelnen Melder und für die Zentrale anzugeben, die eine einfache und zuverilässige Melderidentifizierung gestatten, ohne daß dabei eine erhebliche Umrüstung einer bestehenden Meldeaniage erforderlich wäre.Retrofitting an existing system requires not only retrofitting in the control center, but also specially designed detectors that are equipped with a codable addressing device. These measures disadvantageously cause high costs. It is therefore an object of the invention to provide retrofittable additional circuit arrangements for the individual detectors and for the control center for existing hazard detection systems, such as those which the applicant has been selling for years, which allow simple and reliable detector identification, without a significant retrofitting existing reporting arrangement would be required.

Diese Aufgabe wird erfindungsgemäß bei einer oben geschilderten Gefahrenmeldeanlage mit einer Einrichtung gelöst, die durch die Merkmale des Anspruchs 1 gekenn-' zeichnet istThis object is achieved according to the invention in a hazard detection system described above with a device which is characterized by the features of claim 1

Die erfindungsgemäße Einrichtung zur Melderidentfizierung in einer Gefahrenmeldeanlage besteht aus einfachen Zusätzen und läßt sich in vorteilhafter Weise auch in bestehenden Anlagen nachrüsten, ohne die ursprünglichen Funktionen zu beeinflussen.The device according to the invention for detector identification in a hazard alarm system consists of simple additions and can advantageously also be retrofitted in existing systems without influencing the original functions.

Die Einrichtung weist Melderzusatz-Schaltungsanordnungen auf, die jeweils einem Melder zugeordnet sind und mit dem Melder zusammen jeweils eine Meldereinheit bilden. Ferner weist sie eine Melderidentifizierungs-Schaltungsanordnung au, ie in der Zentrale der Auswerteeinrichtung zugeord net ist und mit einer Strommeßeinrichtung den Linienstrom überwacht Die Melderzusatz-Schaltungsanordnung weist ein steuerbares Schaltelement auf, das durch den vom alarmauslösenden Melder verursachten erhöhten Stromfluß durchschattet und die von der Zentrale abgegebenen Stromimpulse einerseits an die Melderanzeige gelangen läßt und andererseits einem Impulsteiler zuführt. Dieser Impulsteiler ist auf ein bestimmtes Teilungsverhältnis einstellbar, so daß eine Adresse für den zugehörigen Melder eingestellt werden kann. Mit dem ersten Stromimpuls der Zentrale wird der impuisteiler in seine Ausgangsstellung zurückgestellt, mit den weiteren Stromimpulsen bis zu seinem eingestellten Wert weitergeschattet Mit dem Erreichen dieses eingestellten Wertes wird von Ausgang des impulsteilers eine Stromreduzierungseinrichtung angesteuert, die im Anschlußzweig des Melders angeordnet ist und den Stromfluß zum alarmauslösenden Melder in definierter Weise reduziert Die Strommeßeinrichtung in der Melderidentifizierungsschaltung erkennt den in seinem Stromwert reduzierten Stromimpuls. Die von der Zentrale auf die Meldeieitung gegebenen Stromimpulse werden bis zum reduzierten Stromimpuls gezählt so daß daraus der alarmauslösende Melder ermittelt und angezeigt werden kann. Dazu ist zweckmäßigerweise der Strommeßeinrichtung ein Analog-Digital-Wandler nachgeschaltet, dem die Meßwerte des überwachten Linienstroms zugeführt sind. Dem Analog-Digital-Wandler ist ein Mikrorechner nachgeschaltet dem einerseits die digitalisierten Stromwerte und andererseits die zentralseitig abgegebenen Stromim pulse zugeführt werden. Der Mikrorechner ist mit einem weiteren Eingang des Analog-Digital-Wandlers zur zeitrichtigen Bestimmung der Impulsgröße verbunden. Im Mikrorechner wird die Adresse des angesprochenen Melders ermittelt und in entsprechend aufbereiteter Form über den Rechnerausgang einer Anzeigeeinrichtung zugeführt und dort angezeigtThe device has additional detector circuit arrangements which are each assigned to a detector and together with the detector each form a detector unit. Furthermore, it has a detector identification circuit arrangement, ie it is assigned to the central unit of the evaluation device and monitors the line current with a current measuring device. The additional detector circuit arrangement has a controllable switching element which shades through the increased current flow caused by the alarm-triggering detector and that from the central unit emitted current pulses on the one hand can reach the detector display and on the other hand feeds a pulse divider. This pulse divider can be set to a certain division ratio, so that an address can be set for the associated detector. With the first current pulse from the control center, the pulse divider is reset to its starting position, with the further current pulses it continues to its set value.When this set value is reached, a current reducing device is activated from the output of the pulse divider, which is arranged in the connection branch of the detector and the current flow to Alarm-triggering detectors reduced in a defined manner The current measuring device in the detector identification circuit detects the current pulse which is reduced in its current value. The current pulses given by the control center to the signal line are counted up to the reduced current pulse so that the alarm triggering detector can be determined and displayed. For this purpose, an analog-to-digital converter is expediently connected to the current measuring device, to which the measured values of the monitored line current are fed. The analog-to-digital converter is followed by a microcomputer which, on the one hand, supplies the digitized current values and, on the other hand, the current pulses emitted on the central side. The microcomputer is connected to another input of the analog-digital converter for the correct determination of the pulse size. The address of the addressed detector is determined in the microcomputer and, in a correspondingly prepared form, is fed to a display device via the computer output and displayed there

Zweckmäßige Ausgestaltungen der Erfindung sind in den Unteransprüchen angeführt Der Aufbau und die Wirkungsweise der erfindungsgemäßen Einrichtung zur Melderidentifizierung werden an einem Ausführungsbeispiel anhand der Zeichnung erläutert Dabei zeigen die

  • Fig. 1 eine Meldereinheit mit einer Meiderzusatz-Schaltungsanordnung und einem dazugehörigen Melder und
  • Fig. 2 eine Meideridentifizierungs-Schaltungsanordnung zur Erkennung und Anzeige der Melderadresse in der Zentrale.
Expedient embodiments of the invention are set out in the subclaims. The structure and mode of operation of the device for detector identification according to the invention are explained using an exemplary embodiment with reference to the drawing
  • Fig. 1 is a detector unit with a Meiderzusatz circuit arrangement and an associated detector and
  • Fig. 2 shows a avoidance identification circuit arrangement for detecting and displaying the detector address in the control center.

Eine erfindungsgemäße Schaltungsanordnung für einen Meiderzusatz zur Melderidentifizierung ist in Fig. 1 dargestellt Die Melderzusatz-Schaltungsanordnung MZS bildet mit dem dazugehörigen Melder M1 eine Meldereinheit ME1, die über die Klemmen 1 und 4 an der Meideieitung ML angeschlossen ist Die Meldeieitung ML, an der die Linienspannung UL liegt, ist mit der hier nicht dargestellten Zentrale Z verbunden. Der Melder M1 ist an den Klemmen a und d angeschlossen. Dabei sind die Klemmen 1, a positiv gegenüber den Klemmen 4, b und 5. Die Anschlußklemmen 4 und 5 sind durchverbunden, so daß an der Meideleitung ML an den Klemmen 1 und 5 die nächste Meldereinheit ME2 angeschlossen istA circuit arrangement according to the invention for an avoidance additive for detector identification is shown in FIG. 1. The detector add-on circuit arrangement MZS forms with the associated detector M1 a detector unit ME1, which is connected via terminals 1 and 4 to the avoidance line ML. The notification line ML, to which the line voltage UL lies, is connected to the control center Z, not shown here. The M1 detector is connected to terminals a and d. The terminals 1, a are positive with respect to the terminals 4, b and 5. The terminals 4 and 5 are connected through, so that the next detector unit i t ME2 is connected to the main line ML at terminals 1 and 5

Im Ruhezustand liegt zwischen den Klemmen 1 und 4 die Linienspannung UL, die z.B. 20 Volt betragen kann, an. Der Linienstrom IL beträgt im Ruhezustand beispielsweise 5 mA und besteht aus dem überwachungsstrom durch einen Abschlußwiderstand am Ende der Meideleitung ML (hier nicht dargestellt) sowie aus der Summe der Versorgungsströme aller Meldereinheiten ME1, ME2 usw.. Im Alarmfall führt der Melder einen erhöhten Strom, der in der Zentrale auf 10 mA begrenzt wird, so daß aufgrund des Spannungseinbruchs auf der Meldelinie ein Alarm erkannt wird. Daraufhin erhöht die Zentrale beispielsweise im Sekundenrhythmus das, Stromangebot auf beispielsweise 100 mA, so daß Stromimpulse (IPZ) mit diesem Grenzwert auf die Meldeleitung ML gegeben werden. In der Meiderzusatz-Schaltungseinrichtung MZS ist in einem Melderanachlußzweig (a-1) ein Widerstand R11 angeordnet, über den der erhöhte Strom fließt Der an der Meidelinie über eine Meideranzeige MA, eine Leuchtdiode, angeschlossenen Transistor TR1 wird über den Widerstand R12 leitend geschaltet. Dadurch wird einerseits über den der Leuchtdiode MA vorgeschalteten Widerstand R8 die Leuchtdiode eingeschaltet. Gleichzeitig wird über den Widerstand R9 eine Spannung an die Klemme 6 gelegt, an die z.B. eine Paralielanzeige angeschlossen werden kann. Die mit dem zentralseitigen Stromimpuls (IPZ) über den Transistor TR1 an die Klemme 6 gelangte Spannung wird über die Diode D geführt und dem dem impulsteiler IPT einerseits als Versorgungsspannung direkt zugeführt und andererseits über das Differenzierglied C1, R1 dem Rücksetzeingang R des impulsteilers IPT zugeführt. An den C-Eingang des impulsteilers gelangt die an der Klemme 6 anstehende Spannung direkt.In the idle state, the line voltage UL, which can be 20 volts, for example, is present between terminals 1 and 4. The line current IL is, for example, 5 mA in the idle state and consists of the monitoring current through a terminating resistor at the end of the main line ML (not shown here) and the sum of the supply currents of all detector units ME1, ME2 etc. In the event of an alarm, the detector carries an increased current, which is limited to 10 mA in the control center so that an alarm is recognized due to the voltage dip on the detection line. The control center then increases, for example, the current supply to, for example, 100 mA every second, so that current pulses (IPZ) with this limit value are transmitted to the signal line ML. In the Meiderzusatz circuit device MZS is in a Mel the connecting branch (a-1) a resistor R11 is arranged, through which the increased current flows. The transistor TR1 connected to the avoidance line via a avoidance indicator MA, a light-emitting diode, is switched on via the resistor R12. As a result, the LED is switched on via the resistor R8 connected upstream of the LED MA. At the same time, a voltage is applied to terminal 6 via resistor R9, to which, for example, a parallel display can be connected. The voltage reached with the central current pulse (IPZ) via the transistor TR1 at the terminal 6 is passed through the diode D and supplied to the pulse divider IPT directly as a supply voltage and on the other hand via the differentiator C1, R1 to the reset input R of the pulse divider IPT. The voltage at terminal 6 goes directly to the C input of the pulse divider.

Das Teilerverhältnis des impulsteilers IMT ist über die Schalter S1 bis Sn auf einen der Adresse des Meiders entsprechenden Wert eingestellt Der Kondensator CV dient zur Energieversorgung in den impulspausen, in denen an der Klemme 6 keine Spannung anliegt Mit dem erstmaligen Anlegen der Versorgungsspannung für den Impulsteiler IPT wird über das Differenzierglied C1, R1 der impulsteiler IPT über den Rückstelleingang R in die Anfangsiage gesetzt. Der impulsteiler IPT wird über den Takteingang C von den Spannungsimpulsen, die an der Klemme 6 anstehen, weitergeschaltet. Erreicht der Teilerstand die eingestellte Nummer, so wird vom Ausgang Q über ein weiters Diffe renzierglied R2, C2 der zweite Transistor TR2 gesperrt. Damit sperrt über die Widerstände R6, R5 der dritte Transistor TR3, so daß der über den im Meideanschtußzweig (8-1) angeordneten Widerstand R7 in den aiarmaustöaenden Melder (z.B. M1) fließenden Strom signifikant geschwächt wird, d.h. um einen vorbestimmbaren Betrag reduziert wird. Gleichzeitg wird der Impusteiler IPT in nicht näher beschriebener Weise wieder in den Ausgangszustand zurückgesetzt. Dies wird durch die interne Eigenschaft des IC-Schaltkreises des impulsteilers IPT bewirkt Auf diese Weise beginnt der beschriebene Vorgang von vome. Dadurch kann die in der Zentrale ermittelte Meldersdresse kontrolliert und so auch bei Störungen durch entsprend viele Wiederholungen der Messung sicher erkannt werden.The divider ratio of the pulse divider IMT is set to a value corresponding to the address of the Meider via switches S1 to Sn. The capacitor CV is used for power supply in the pulse pauses in which there is no voltage at terminal 6 When the supply voltage for the pulse divider IPT is applied for the first time the pulse divider IPT is set via the differentiating element C1, R1 via the reset input R into the initial layer. The pulse divider IPT is switched on via clock input C by the voltage pulses applied to terminal 6. If the division number reaches the set number, the output will Q the second transistor TR2 blocked via a further differentiating element R2, C2. This blocks the third transistor TR3 via the resistors R6, R5, so that the current flowing through the resistor R7 arranged in the avoidance branch ( 8-1 ) into the aiarmaustöaenden detector (eg M1) is significantly weakened, ie reduced by a predeterminable amount. At the same time, the pulse divider IPT is reset to the initial state in a manner not described in detail. This is caused by the internal property of the IC circuit of the pulse divider IPT. In this way, the process from vome begins. This enables the detector address determined in the control center to be checked and thus reliably recognized even in the event of malfunctions due to the repeated repetition of the measurement.

In der Zentrale wird erfindungsgemäß eine Melderidentifizierungs-Schaltungsanordnung der Auswerteeinrichtung zugeordnet und in die Meldelinie eingefügt. Diese Meideridentifizierungs-Schaltungsanordnung überwacht den Linienstrom der Meldeleitung und zählt im Aiarmfall die zentralseitigen Stromimpulse mit Dabei erkennt die Melderidentifizierungs-Schattungsanordnung den Stromimpuls mit reduziertem Stromfluß und damit die Nummer des alarmausiösenden Melders. Diese Nummer wird beispieisweise auf einer zweistelligen 7-Segment-Anzeige angezeigt Zusammen mit der ohnehin vorhandenen Anzeige der alarmausiösenden Melderleitung ist damit der betreffende Meider eindeutig identifizierbar.In the control center, a detector identification circuit arrangement is assigned to the evaluation device and inserted into the detection line. This avoidance identification circuit arrangement monitors the line current of the signaling line and, in the event of an alarm, also counts the central current impulses. The detector identification shade arrangement recognizes the current pulse with reduced current flow and thus the number of the alarm-triggering detector. This number is displayed, for example, on a two-digit 7-segment display. Together with the existing display of the alarm-triggering detector line, the avoider in question can be clearly identified.

Eine erfindungsgemäße Melderidertifizeierungs-Schaltungsanordnung MIS ist in Fig. 2 dargestellt An den Kkmmen 7 und 8 wird die gemeinsame Versorgungsspannung UV von z.B. 24 Volt angeschlossen. Von den Klemmen 7' und 9 werden im Vielfach alle hier nicht dargesteilten, in den bekannten Anlagen gebräuchlichen Auswerteeinrichtungen AWE der einzelnen Meldeleitungen ML gespeist, in denen die oben geschilderten spezifischen Spannungs-und Stromwerte erzeugt werden. Der Linienstrom IL fließt über einen in der Ader 8-9 der Meldeleitung ML angeordneten Meßwiderstand RM und wird bei diesem Ausführungsbeispiel als Spannungsabfall über den Operationsverstärker OV, dessen Verstärkung mit den Widerständan R3 und R4 eingestallt wird, dem Eingang E des Analog-Digital-Wandlers AD zugeführt Über den weiteren Eingang F wird der Analog-Digital-Wandier AD vom Mikrorechner MR, der an seinem Eingang B von den Stromimpulsen IPZ (Blinktakt) beaufschlagt wird, zur zeitrichtigen Bestimmung der Impulsstromgröße veranlaßt Der Analog-Digital-Wandler AD liefert an seinem mehrpoligen Ausgang QW die digitalisierte Stromgröße an den Mikrorechner MR. Dort wird die Adresse des alarmauslösenden Melders ermittelt, in entsprechend sufbereiteter Form über den mehrpoligen Ausgang QR der zweistelligen Digitalanzeige ANZ angeboten und dort angezeigtA detector identification circuit arrangement MIS according to the invention is shown in FIG. 2. At points 7 and 8, the common supply voltage UV of e.g. 24 volts connected. All of the evaluation devices AWE of the individual signaling lines ML, which are not shown here and are common in the known systems, are fed from the terminals 7 'and 9, in which the specific voltage and current values described above are generated. The line current IL flows through a measuring resistor RM arranged in the wire 8-9 of the signal line ML and is in this embodiment as a voltage drop across the operational amplifier OV, the amplification of which is instilled with the resistors R3 and R4, the input E of the analog-digital converter AD supplied Via the further input F, the analog-to-digital converter AD is caused by the microcomputer MR, which is acted upon by the current pulses IPZ (flashing pulse) at its input B, for the correct determination of the pulse current magnitude multipole output QW the digitized current size to the microcomputer MR. There the address of the alarm triggering detector is determined, offered in a correspondingly prepared form via the multi-pin output QR of the two-digit digital display ANZ and displayed there

BezugszeichnlisteReference drawing list

  • AD Analog-Digital-WAndlerAD analog-digital converter
  • ANZ AnzeigeeinrichtungANZ display device
  • AWE AuswerteeinrichtungAWE evaluation device
  • IL LinienstromIL line current
  • IPT ImpulsteilerIPT pulse divider
  • IPZ Stromimpulse bei Alarm (mit zweiten Strom grenzwert von z.B. 100 mA, sog. "Blink takt", von Z aus)IPZ current pulses in the event of an alarm (with a second current limit of e.g. 100 mA, so-called "flashing clock", from Z)
  • MA Melderanzeige (LED)MA detector display (LED)
  • ME MeldereinheitME detector unit
  • MIS Melderidentifizierungs-SchaltungsanordnungMIS detector identification circuitry
  • ML MeldaleitungML reporting line
  • MR MikrorechnerMR microcomputer
  • MZS Melderzusatz-SchaltungsanordnungMZS detector additional circuit arrangement
  • OV OperationsverstärkerOV operational amplifier
  • R1, C1 Differenzierglied 1R1, C1 differentiator 1
  • R2, C2 Differenzierglied 2R2, C2 differentiator 2
  • R3, R4 Spannungsteiler in der StrommeßeinrichtungR3, R 4 voltage divider in the current measuring device
  • R5, R6 Spannungsteiler in der Stromreduzierungs einrichtungR5, R6 voltage divider in the current reducing device
  • RM MeßwiderstandRM measuring resistor
  • SRE StromreduzierungseinrichtungSRE power reduction device
  • SME StrommeßeinrichtungSME current measuring device
  • TR1 steuerbares Schaltelement (z.B. Transi stor)TR1 controllable switching element (e.g. Transi stor)
  • UL LinienspannungUL line voltage
  • UV VersorgungsspannungUV supply voltage
  • Z ZentraleZ headquarters

Claims (10)

1. Einrichtung zur Melderidentifizierung in einer Gefahrenmekieanlage, insbesondere Brandmekleanlage, mit mehreren an einer Zentrale (Z) mit einer Auswerteeinrichtung (AWE) angeschlossenen, ruhestromüberwachten Zweidraht-Meideleitungen (ML), an die jeweils mehrere Melder (M1, M2, ...) angeschlossen sind, wobei ein alarmauslösender Melder einen Spannungseinbruch der betreffenden Linienspannung (UL) auf Grund einer zentralseitigen Begrenzung des Linienstroms (IL) auf einen ersten Stromgrenzwert verursacht und daraus in der Zentrale (Z) eine Alarmmeldung der betreffenden Meldeleitung (ML) abgeleitet wird und in die Zentrale (Z) Stromimpulse (IPZ) mit einem zweiten, erhöhten Stromgrenzwert auf die betreffende Meldeleitung (ML) gibt, wobei der alarmauslösende Melder einen erhöhten Stromfluß auf der Meldeleitung verursacht, dadurch gekennzeichnet, daß jedem Melder (M1, M2, ...) eine Melderzusatz-Schaltungsanordnung (MZS) zugeordnet ist und mit dem Melder zusammen eine Meldereinheit (ME1, ME2, ...) bildet, daß die Meiderzusatz-Schaltungsanordnung (MZS) eine an die Meldeleitung (ML) Ober ein steuerbares Schaltelement (TR1) angeschlossene Melderanzeige (MA), einen von den Stromimpulsen (IPZ) beaufschlagten impulsteiler (IPT), dessen Teilerverhältnis zur Bildung einer Meldeadresse mittels Schalter (SI-Sn) einstellbar ist, und eine im Melderanschlußzweig (1 - a) angeordnete, vom impulsteiler (IPT) ansteuerbare Stromreduzierungseinrichtung (SRE) aufweist, wobei mit jedem Stromimpuls (IPZ) die Melderanzeige (MA) des alarmauslösenden Meiders eingeschaltet wird und mit dem ersten Stromimpuls (IPZ) der Impulstiler (IPT) in seine Ausgangslage und mit jedem weiteren Stromimpuls (IPZ) bis auf seinen eingesteliten Wert weitergeschaltet wird und wobe ferner der impuisteiler (IPT) mit dem Erreichen seines eingestellten Wertes an die Stromreduzierungseinrichtung (SRE) ein Steuersignal abgibt, daß in der Zentrale (Z) der Auswerteeinrichtung (AWE) eine MeldeidentifizerungsSchaltungsanordnung (MIS) zugeordnet ist, die eine Strommeßeinrichtung (SME) zur überwachung des Linienstroms (IL), einen Analog-Digital-Waradler (AD), dessen erster Eingang (E) mit dem gemessenen Linienstrom beaufschlagt ist, und einen dem Analog-Digital-Wandler (AD) nachgeschaltenten Mikrorechner (MR) mit einer Anzeigeeinrichtung (ANZ) für die Meldeadresse aufweist, wobei die digitalisierten Stromwerte vom Ausgang (QW) des Analog-Digital-Wandlers (AD) dem Mikrorechner (MR) zugeführt sind, der seinerseits mit einem weiteren Eingang' (F) des Analog-Digitalwandlers (AD) verbunden ist sowie von den Stromimpulsen (IPZ) des erhöhten Linienstroms (Blinktakt) beaufschlagt ist, wobei ferner die Stromimpulse (IPZ) bis zum stromreduzierten Impuls gezählt und daraus die Adresse des alarmauslösenden Meiders abgeleitet und angezeigt wird.1.Device for detector identification in a hazard detection system, in particular a fire detection system, with several quiescent current-monitored two-wire medium lines (ML) connected to a control center (Z) with an evaluation device (AWE), to each of which several detectors (M1, M2, ...) are connected, whereby an alarm-triggering detector causes a voltage drop in the line voltage (UL) in question due to a central limitation of the line current (IL) to a first current limit value, and an alarm message of the relevant signaling line (ML) is derived from it in the control center (Z) and in the center (Z) gives current pulses (IPZ) with a second, increased current limit value to the relevant signaling line (ML), the alarm-triggering detector causing an increased current flow on the signaling line, characterized in that each detector (M1, M2, ... ) a detector additional circuit arrangement (MZS) is assigned and together with the detector a detector unit (ME1, ME2 , ...) forms that the Meiderzusatz circuit arrangement (MZS) a detector display (MA) connected to the signal line (ML) via a controllable switching element (TR1), a pulse divider (IPT) acted upon by the current pulses (IPZ), its divider ratio to form a signaling address can be set by means of a switch (SI-Sn), and has a current reduction device (SRE) arranged in the detector connection branch (1 - a) and controllable by the pulse divider (IPT), with the detector display (MA) of the with each current pulse (IPZ) the alarm triggering meider is switched on and with the first current impulse (IPZ) the impulse silencer (IPT) is switched to its starting position and with each further current impulse (IPZ) to its set value and the pulse divider (IPT) also starts when it reaches its set value the current reducing device (SRE) emits a control signal that in the center (Z) of the evaluation device (AWE) a message identification circuit arrangement g (MIS) is assigned, which has a current measuring device (SME) for monitoring the line current (IL), an analog-digital waradler (AD), the first input (E) of which is measured with the measured line current, and one for the analog-digital Converter (AD) downstream microcomputer (MR) with a display device (ANZ) for the reporting address, the digitized current values from the output (QW) of the analog-to-digital converter (AD) are supplied to the microcomputer (MR), which in turn with a further input '(F) of the analog-digital converter (AD) is connected and is acted upon by the current pulses (IPZ) of the increased line current (flashing clock), the current pulses (IPZ) being counted up to the current-reduced pulse and from this the address of the alarm-triggering Meiders is derived and displayed. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in der Melderzusatz-Schaltungsanordnung (MZS) das steuerbare Schaltelement (TR1) von einem ersten Transistor gebildet ist, der auf Grund des alarmauslbsenden Melders durchschaltet und die Stromimpulse (IPZ) über einen Widerstand (R9) direkt an den Takteingang (C) und über ein erstes Differenzierglied (R1, C1) an den Rücksetzeingang (R) des Impulsteilers (IPT) gelangen läßt, daß die Stromreduzierungseinrichtung (SRE) der Melderzusatz-Schaltungsanordnung (MZS) von einem zweiten Transistor (TR2), einem dritten Transistor (TR3) und einem zweiten Differenzierglied (R2, C2) gebildet ist, wobei der Ausgang ( Q) des Impulsteilers (IPT) über das zweite Differenzierglied (R2, C2) den zweiten Transistor (TR2) ansteuert, der seinerseits über einen Spannungsteiler (R5, R6) den nachgeschalieten dritten Transistor (TR3) ansteuert, der den über einen im MeideranschluBweig (1-a) liegenden Widerstand (R7) zum Melder (M1) fließenden Strom reduziert.2. Device according to claim 1, characterized in that in the detector additional circuit arrangement (MZS) the controllable switching element (TR1) is formed by a first transistor which switches on due to the alarm triggering detector and the current pulses (IPZ) via a resistor (R9 ) directly to the clock input (C) and via a first differentiating element (R1, C1) to the reset input (R) of the pulse divider (IPT), that the current reducing device (SRE) of the detector additional circuit arrangement (MZS) is connected to a second transistor ( TR2), a third transistor (TR3) and a second differentiating element (R2, C2) is formed, the output (Q) of the pulse divider (IPT) via the second differentiating element (R2, C2) driving the second transistor (TR2) in turn, via a voltage divider (R5, R6) controls the third transistor (TR3), which reduces the current flowing through a resistor (R7) in the shunt connection (1-a) to the detector (M1) ert. 3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Differenzierglieder (R1, C1 bzw. R2, C2) von RC-Gliedern gebildet sind.3. Device according to claim 2, characterized in that the differentiators (R1, C1 or R2, C2) are formed by RC elements. 4. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Strommeßeinrichtung (SME) von einem in einer der Adern (9-8) der Meldeleitung (ML) angeordneten Meßwiderstand (RM) und einem mit einem Spannungsteiler (R3, R4) einstellbaren Operationsverstärker (OV) gebildet ist, der die dem Linienstrom (IL) proportionale Spannung dem Analog-Digital-Wandler (AD) zuführt.4. Device according to claim 1, characterized in that the current measuring device (SME) of one in one of the wires (9-8) of the signaling line (ML) arranged measuring resistor (RM) and a with a voltage divider (R3, R4) adjustable operational amplifier ( OV) is formed, which supplies the voltage proportional to the line current (IL) to the analog-digital converter (AD). 5. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Anzeigeeinrichtung (ANZ) von einer mehrstelligen Sieben-Segment-Anzeige gebildet ist, die dem Mikrorechner (MR) nachgeschaltet ist5. Device according to claim 1, characterized in that the display device (ANZ) is formed by a multi-digit seven-segment display, which is connected downstream of the microcomputer (MR) 6. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Melderzusatz-Schaltungsanordnung (MZS) in der Fassung des Melders angeordnet ist.6. Device according to claim 1, characterized in that the detector additional circuit arrangement (MZS) is arranged in the version of the detector. 7. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß in der Zentrale (Z) mehrere Melderidentifizierungs-Schaltungsanordnungen (MIS) angeordnet sind, die den jeweiligen Auswerteeinrichtungen (AWE) der jeweiligen Meldeleitung (ML) zugeordnet sind.7. Arrangement according to claim 1, characterized in that in the control center (Z) a plurality of detector identification circuit arrangements (MIS) are arranged, which are assigned to the respective evaluation devices (AWE) of the respective signaling line (ML). 8. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die im Alarmfall in der Zentrale (Z) erzeugten Stromimpulse (IPZ) zur Meideridentifizierung in ihrer Frequenz und/oder in ihrem Tastverhältnis gegenüber dem normalen Takt, d.h. ohne Melderidentifizerung, verändert sind.8. Device according to claim 1, characterized in that the current pulses (IPZ) generated in the event of an alarm in the control center (Z) for avoidance identification in terms of their frequency and / or in their duty cycle compared to the normal clock, i.e. without detector identification are changed. 9. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in der Mekierzuzsatz-Schaltungsanordnung (MZS) anstelle der Stromreduzierungseinrichtung (SRE) eine Einrichtung zur Verkürzung der Impulsstromdaurer vorgesehen ist9. Device according to claim 1, characterized in that in the Mekierzuzatz circuit arrangement (MZS) instead of the current reducing device (SRE) a device for shortening the pulse current duration is provided 10. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in der Meiderzusatz-Schattungsanordnung (MZS) statt der Stromreduzierungseinrichtung (SRE) eine Einrichtung zur Zeit- bzw. Amplitudenmudulation des Impulsstromes vorgesehen ist 1 0. A device according to claim 1 , characterized in that in the Meiderzusatz shading arrangement (MZS) instead of the current reducing device (SRE) a device for time or amplitude modulation of the pulse current is provided
EP85111427A 1984-09-12 1985-09-10 Annunciator identification arrangement in an alarm system Expired EP0179248B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111427T ATE43733T1 (en) 1984-09-12 1985-09-10 DEVICE FOR DETECTOR IDENTIFICATION IN AN ALERT SYSTEM.

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DE3433476 1984-09-12
DE3433476 1984-09-12

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EP0179248A1 true EP0179248A1 (en) 1986-04-30
EP0179248B1 EP0179248B1 (en) 1989-05-31

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FR2319165A1 (en) * 1975-07-25 1977-02-18 Siemens Ag Transmission system for measured values in fire alarm system - with delay time preceding transmission characterising each detector (BE240177)
DE2935335A1 (en) * 1979-08-31 1981-03-19 Siemens AG, 1000 Berlin und 8000 München DC alarm signalling system - has two parallel lines connecting series of units, with terminal impedance and memory to record impedance at various times

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015223207A1 (en) * 2015-11-24 2017-05-24 Minimax Gmbh & Co. Kg Condition monitoring unit for identifying an event detecting participant and participants and methods thereto

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DE3570780D1 (en) 1989-07-06
EP0179248B1 (en) 1989-05-31
ATE43733T1 (en) 1989-06-15

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