EP0179248B1 - Annunciator identification arrangement in an alarm system - Google Patents

Annunciator identification arrangement in an alarm system Download PDF

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Publication number
EP0179248B1
EP0179248B1 EP85111427A EP85111427A EP0179248B1 EP 0179248 B1 EP0179248 B1 EP 0179248B1 EP 85111427 A EP85111427 A EP 85111427A EP 85111427 A EP85111427 A EP 85111427A EP 0179248 B1 EP0179248 B1 EP 0179248B1
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EP
European Patent Office
Prior art keywords
annunciator
current
pulse
ipz
alarm
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EP85111427A
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German (de)
French (fr)
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EP0179248A1 (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
Publication of EP0179248A1 publication Critical patent/EP0179248A1/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.
  • Hazard detection systems with detector identification are known per se. However, they generally require specially designed detectors, the addresses of which must be encoded 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 the 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 described at the outset, such as have been marketed by the applicant for years, which permit simple and reliable detector identification, without a significant retrofitting existing alarm system 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 which is assigned to the evaluation device in the control center and monitors the line current with a current measuring device.
  • the detector additional circuit arrangement has a controllable switching element which switches through due to the increased current flow caused by the alarm-triggering detector and on the one hand allows the current pulses emitted by the control center to 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 becomes. reset to its initial position, with the further current pulses switched to its set value.
  • the output of the pulse divider controls a current reducing device which is arranged in the connecting branch of the detector and reduces the current flow to the alarm-triggering detector in a defined manner.
  • the current measuring device in the detector identification circuit recognizes the current pulse which is reduced in its current value.
  • the current impulses given by the control center to the signaling line are counted up to the reduced current impulse 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.
  • a microcomputer is connected downstream of the analog-digital converter, to which the digitized current values on the one hand and the current impulses delivered on the central side are supplied on the one hand.
  • the microcomputer is connected to another input of the analog-digital converter for the correct determination of the pulse size.
  • the address of the detector addressed is determined in the microcomputer and, in a correspondingly prepared form, is fed to a display device via the computer output and displayed there.
  • FIG. 1 A circuit arrangement according to the invention for a detector add-on for detector identification is shown in FIG. 1.
  • the detector additional circuit arrangement MZS forms with the associated detector M1 a detector unit ME1, which is connected via terminals 1 and 4 to the signal line ML.
  • the signal line ML on which the line voltage UL is located, is not shown here put head office Z connected.
  • the M1 detector is connected to terminals a and d. Terminals 1, a are positive with respect to terminals 4, b and 5.
  • the terminals 4 and 5 are connected through, so that the next detector unit ME2 is connected to terminals 1 and 5 on the signal line ML.
  • the line voltage UL lies between terminals 1 and 4, which e.g. Can be 20 volts.
  • 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 signal 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 through which the increased current flows, is arranged in a detector connection branch (a-1) in the detector additional circuit device MZS.
  • the transistor TR1 connected to the detection line via a detector display MA, a light-emitting diode, is turned on via the resistor R12.
  • 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 e.g. a parallel display can be connected.
  • the voltage which has reached the terminal 6 with the central current pulse (IPZ) via the transistor TR1 is conducted via the diode D and is supplied directly to the pulse divider IPT as a supply voltage and is also supplied to the reset input R of the pulse divider IPT via the differentiator C1, R1.
  • the voltage at terminal 6 is sent directly to the C input of the pulse divider.
  • the division ratio of the pulse divider IMT is set to a value corresponding to the address of the detector via switches S1 to Sn.
  • the capacitor CV is used for energy supply in the pulse pauses, in which there is no voltage at terminal 6.
  • the pulse divider IPT is set to the initial position via the differentiating element C1, R1 via the reset input R.
  • the pulse divider IPT is switched on via the clock input C by the voltage pulses applied to terminal 6. Reaches the division number, the second transistor TR2 is blocked by the output Q via a further differentiating element R2, C2.
  • the third transistor TR3 thus blocks via the resistors R6, R5, so that the current flowing through the resistor R7 arranged in the signaling branch (a-1) into the alarm-triggering detector (e.g. M1) is significantly weakened, i.e. is reduced by a predeterminable amount.
  • 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 described begins again. 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 a corresponding number of repetitions of the measurement.
  • a detector identification circuit arrangement is assigned to the evaluation device and inserted into the detection line.
  • This detector identification circuit arrangement monitors the line current of the signaling line and counts the central-side current pulses in the event of an alarm.
  • the detector identification circuit arrangement recognizes the current pulse with reduced current flow and thus the number of the alarm triggering detector. This number is displayed on a two-digit 7-segment display, for example. Together with the already existing display of the alarm-triggering detector line, the detector in question can thus be clearly identified.
  • a detector identification circuit arrangement MIS is shown in FIG. 2.
  • the common supply voltage UV e.g. 24 volts connected.
  • All of the evaluation devices AWE of the individual signal 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 gain of which is set with the resistors R3 and R4, the input E of the analog-to-digital converter AD fed.
  • 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 size.
  • the analog-to-digital converter AD supplies the digitized current quantity to the microcomputer MR at its multipole output QW.
  • There the address of the alarm triggering detector is determined, offered in a correspondingly processed form via the multi-pin output QR of the two-digit digital display ANZ and displayed there.

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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 Gefahrenmeldeanlage, 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 Meldeleitung 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 signaling line is displayed in the control center. However, there is an increasing desire for 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 Pulsmeldetechnik (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 identifiziert werden können.In modern hazard detection systems, such as are known, for example, from pulse detection technology (DE-PS 2533382), detector identification is readily possible. However, such alarm systems use special detectors and control panels, so that a complete retrofitting of existing systems would be required. However, there is often a desire to supplement existing systems at least in part so that individual detectors can be identified.

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 Auswerteeinrichtungen in der Zentrale können dann bei Alarmgabe aus dem vom Melder übertragenen oder abgefragten Code die Adresse des betreffenden Melders ermitteln und anzeigen.Hazard detection systems with detector identification are known per se. However, they generally require specially designed detectors, the addresses of which must be encoded 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 Adressiereinrichtung ausgerüstet sind. Diese Maßnahmen verursachen in nachteiliger Weise einen hohen Kostenaufwand. Aufgabe der Erfindung ist es daher für bestehende, eingangs geschilderte Gefahrenmeldeanlagen, wie sie beispielsweise seit Jahren vom Anmelder vertrieben werden, nachrüstbare Zusatzschaltungsanordnungen für die einzelnen Melder und für die Zentrale anzugeben, die eine einfache und zuverlässige Melderidentifizierung gestatten, ohne daß dabei eine erhebliche Umrüstung einer bestehenden Meldeanlage erforderlich wäre.Retrofitting an existing system requires not only the 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 described at the outset, such as have been marketed by the applicant for years, which permit simple and reliable detector identification, without a significant retrofitting existing alarm system would be required.

Diese Aufgabe wird erfindungsgemäß bei einer oben geschilderten Gefahrenmeldeanlage mit einer Einrichtung gelöst, die durch die Merkmale des Anspruchs 1 gekennzeichnet ist.This object is achieved according to the invention in a hazard alarm system described above with a device which is characterized by the features of claim 1.

Die erfindungsgemäße Einrichtung zur Melderidentifizierung 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 auf, die 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 durchschaltet 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 Impulsteiler . in seine Ausgangsstellung zurückgestellt, mit den weiteren Stromimpulsen bis zu seinem eingestellten Wert weitergeschaltet. 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 Meldeleitung 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 angezeigt.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 which is assigned to the evaluation device in the control center and monitors the line current with a current measuring device. The detector additional circuit arrangement has a controllable switching element which switches through due to the increased current flow caused by the alarm-triggering detector and on the one hand allows the current pulses emitted by the control center to 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 becomes. reset to its initial position, with the further current pulses switched to its set value. When this set value is reached, the output of the pulse divider controls a current reducing device which is arranged in the connecting branch of the detector and reduces the current flow to the alarm-triggering detector in a defined manner. The current measuring device in the detector identification circuit recognizes the current pulse which is reduced in its current value. The current impulses given by the control center to the signaling line are counted up to the reduced current impulse 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. A microcomputer is connected downstream of the analog-digital converter, to which the digitized current values on the one hand and the current impulses delivered on the central side are supplied on the one hand. The microcomputer is connected to another input of the analog-digital converter for the correct determination of the pulse size. The address of the detector addressed 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 Melderzusatz-Schaltungsanordnung und einem dazugehörigen Melder und
  • Fig. 2 eine Melderidentifizierungs-Schaltungsanordnung zur Erkennung und Anzeige der Melderadresse in der Zentrale.
Appropriate embodiments of the invention are set out in the subclaims. The structure and the mode of operation of the device for detector identification according to the invention are explained using an exemplary embodiment with reference to the drawing. The show
  • Fig. 1 shows a detector unit with a detector additional circuit arrangement and an associated detector and
  • Fig. 2 shows a detector identification circuit arrangement for detecting and displaying the detector address in the control center.

Eine erfindungsgemäße Schaltungsanordnung für einen Melderzusatz 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 Meldeleitung ML angeschlossen ist. Die Meldeleitung 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 Meldeleitung ML an den Klemmen 1 und 5 die nächste Meldereinheit ME2 angeschlossen ist.A circuit arrangement according to the invention for a detector add-on for detector identification is shown in FIG. 1. The detector additional circuit arrangement MZS forms with the associated detector M1 a detector unit ME1, which is connected via terminals 1 and 4 to the signal line ML. The signal line ML, on which the line voltage UL is located, is not shown here put head office Z connected. The M1 detector is connected to terminals a and d. Terminals 1, a are positive with respect to terminals 4, b and 5. The terminals 4 and 5 are connected through, so that the next detector unit ME2 is connected to terminals 1 and 5 on the signal line ML.

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 Meldeleitung 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 Melderzusatz-Schaltungseinrichtung MZS ist in einem Melderanschlußzweig (a-1) ein Widerstand R11 angeordnet, über den der erhöhte Strom fließt. Der an der Meldelinie über eine Melderanzeige 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 Parallelanzeige 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 lies between terminals 1 and 4, which e.g. Can be 20 volts. 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 signal 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. A resistor R11, through which the increased current flows, is arranged in a detector connection branch (a-1) in the detector additional circuit device MZS. The transistor TR1 connected to the detection line via a detector display MA, a light-emitting diode, is turned 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 e.g. a parallel display can be connected. The voltage which has reached the terminal 6 with the central current pulse (IPZ) via the transistor TR1 is conducted via the diode D and is supplied directly to the pulse divider IPT as a supply voltage and is also supplied to the reset input R of the pulse divider IPT via the differentiator C1, R1. The voltage at terminal 6 is sent 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 Melders 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 Anfangslage 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 Meldeanschlußzweig (a-1) angeordneten Widerstand R7 in den alarmauslösenden Melder (z.B. M1) fließende Strom signifikant geschwächt wird, d.h. um einen vorbestimmbaren Betrag reduziert wird. Gleichzeitg wird der Impulsteiler 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 vorne. Dadurch kann die in der Zentrale ermittelte Melderadresse kontrolliert und so auch bei Störungen durch entsprechend viele Wiederholungen der Messung sicher erkannt werden.The division ratio of the pulse divider IMT is set to a value corresponding to the address of the detector via switches S1 to Sn. The capacitor CV is used for energy 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 to the initial position via the differentiating element C1, R1 via the reset input R. The pulse divider IPT is switched on via the clock input C by the voltage pulses applied to terminal 6. Reaches the division number, the second transistor TR2 is blocked by the output Q via a further differentiating element R2, C2. The third transistor TR3 thus blocks via the resistors R6, R5, so that the current flowing through the resistor R7 arranged in the signaling branch (a-1) into the alarm-triggering detector (e.g. M1) is significantly weakened, i.e. is 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 described begins again. 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 a corresponding number of repetitions of the measurement.

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

Eine erfindungsgemäße Melderidentifizierungs-Schaltungsanordnung MIS ist in Fig. 2 dargestellt. An den Klemmen 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 dargestellten, 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 Widerständen R3 und R4 eingestellt wird, dem Eingang E des Analog- Digital-Wandlers AD zugeführt. Über den weiteren Eingang F wird der Analog-Digital-Wandler 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 aufbereiteter Form über den mehrpoligen Ausgang QR der zweistelligen Digitalanzeige ANZ angeboten und dort angezeigt.A detector identification circuit arrangement MIS according to the invention is shown in FIG. 2. The common supply voltage UV of e.g. 24 volts connected. All of the evaluation devices AWE of the individual signal 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 gain of which is set with the resistors R3 and R4, the input E of the analog-to-digital converter AD fed. 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 size. The analog-to-digital converter AD supplies the digitized current quantity to the microcomputer MR at its multipole output QW. There the address of the alarm triggering detector is determined, offered in a correspondingly processed form via the multi-pin output QR of the two-digit digital display ANZ and displayed there.

Bezugszeichenliste

  • AD Analog-Digital-WAndler
  • ANZ Anzeigeeinrichtung
  • AWE Auswerteeinrichtung
  • IL Linienstrom
  • IPT Impulsteiler
  • IPZ Stromimpulse bei Alarm (mit zweiten Strom grenzwert von z.B. 100 mA, sog. "Blink takt", von Z aus)
  • MA Melderanzeige (LED)
  • ME Meldereinheit MIS Melderidentifizierungs-Schaltungsanordnung
  • ML Meldeleitung
  • MR Mikrorechner
  • MZS Melderzusatz-Schaltungsanordnung OV Operationsverstärker
  • R1, C1 Differenzierglied 1
  • R2, C2 Differenzierglied 2
  • R3, R4 Spannungsteiler in der Strommeßeinrichtung
  • R5, R6 Spannungsteiler in der Stromreduzierungs einrichtung
  • RM Meßwiderstand
  • SRE Stromreduzierungseinrichtung
  • SME Strommeßeinrichtung
  • TR1 steuerbares Schaltelement (z.B. Transi stor)
  • UL Linienspannung
  • UV Versorgungsspannung
  • Z Zentrale
Reference symbol list
  • AD analog-digital converter
  • ANZ display device
  • AWE evaluation device
  • IL line current
  • IPT pulse divider
  • IPZ current pulses in the event of an alarm (with a second current limit of, for example, 100 mA, so-called "flashing clock", from Z)
  • MA detector display (LED)
  • ME detector unit MIS detector identification circuitry
  • ML reporting line
  • MR microcomputer
  • MZS detector additional circuit arrangement OV operational amplifier
  • R1, C1 differentiator 1
  • R2, C2 differentiator 2
  • R3, R4 voltage divider in the current measuring device
  • R5, R6 voltage divider in the current reducing device
  • RM measuring resistor
  • SRE power reduction device
  • SME current measuring device
  • TR1 controllable switching element (e.g. Transi stor)
  • UL line voltage
  • UV supply voltage
  • Z headquarters

Claims (10)

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, characterised 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 supplementary circuit arrangement (MZS) has an annunciator display (MA) connected to the annunciation 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.
2. Arrangement according to Claim 1, characterised in that the controllable switching element (TR1) in the annunciator supplementary circuit arrangement (MZS) is composed of a first transistor which switches through on the basis of the alarm-triggering annunciator and allows the current pulses (IPZ) to reach the clock input (C) directly via a resistor (R9), and to reach the resetting input (R) of the pulse divider (IPT) via a first differentiating element (R1, C1), and in that the current reducing device (SRE) of the annunciator supplementary circuit arrangement (MZS) is composed of a second transistor (TR2), a third transistor (TR3) and a second differentiating element (R2, C2), the output (0) of the pulse divider (IPT) triggering the second transistor (TR2) via the second differentiating element (R2, C2), which, for its part, triggers the downstream third transistor (TR3) via a voltage divider (R5, R6), which reduces the current flowing to the annunciator (M1) via a resistor (R7) located in the annunciator connecting branch (1-a).
3. Arrangement according to Claim 2, characterised in that the differentiating elements (R1, C1 or R2, C2) are composed of RC elements.
4. Arrangement according to Claim 1, characterised in that the current measuring device (SME) is composed of a shunt resistor (RM) arranged in one of the wires (9-8) of the annunciation circuit (ML) and of an operational amplifier (OV) which can be adjusted with a voltage divider (R3, R4) and feeds the voltage, which is proportional to the line current (IL), to the analog-digital converter (AD).
5. Arrangement according to Claim 1, characterised in that the display device (ANZ) is composed of a multidigit seven-segment display, which is downstream of the microcomputer (MR).
6. Arrangement according to Claim 1, characterised in that the annunciator supplementary circuit arrangement (MZS) is arranged in the annunciator holder.
7. Arrangement according to Claim 1, characterised in that there are arranged in the control centre (Z) several annunciator identification circuit arrangements (MIS), which are assigned to the respective evaluation devices (AWE) of the respective annunciation circuit (ML).
8. Arrangement according to Claim 1, characterised in that for the purpose of annunciator identification the current pulses (IPZ) generated in the control centre (Z) in the case of an alarm are varied in frequency and/or in their pulse duty factor as compared with the normal clock pulse, i.e. without annunciator identification.
9. Arrangement according to Claim 1, characterised in that instead of the current reducing device (SRE) an arrangement for shortening the pulse current duration is provided in the annunciator supplementary circuit arrangement (MZS).
10. Arrangement according to Claim 1, characterised in that instead of the current reducing device (SRE) an arrangement for time or amplitude modulation of the pulsed current is provided in the annunciator supplementary circuit arrangement (MZS).
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.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3433476 1984-09-12
DE3433476 1984-09-12

Publications (2)

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

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Application Number Title Priority Date Filing Date
EP85111427A Expired EP0179248B1 (en) 1984-09-12 1985-09-10 Annunciator identification arrangement in an alarm system

Country Status (3)

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EP (1) EP0179248B1 (en)
AT (1) ATE43733T1 (en)
DE (1) DE3570780D1 (en)

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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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297008B (en) * 1967-01-11 1969-06-04 Siemens Ag Signaling system with detectors connected in parallel in a two-wire loop
DE2230934B1 (en) * 1972-06-23 1973-02-15 Preussag Ag, Feuerschutz, 2060 Bad Oldesloe Alarm device, preferably for fire alarms
DE2245928A1 (en) * 1972-09-19 1974-04-04 Preussag Ag Feuerschutz PROCEDURE AND EQUIPMENT FOR CENTRALIZED DETECTION OF TRIPPED DETECTORS
DE2533330C3 (en) * 1975-07-25 1981-08-13 Siemens AG, 1000 Berlin und 8000 München Method and device for the transmission of measured values in a fire alarm system
DE2533382C2 (en) * 1975-07-25 1980-07-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Method and device for the transmission of measured values in a fire alarm system
DE2533354C3 (en) * 1975-07-25 1979-08-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Device for transmitting control commands in a fire protection system
DE2935335C2 (en) * 1979-08-31 1985-08-08 Siemens AG, 1000 Berlin und 8000 München DC alarm system

Also Published As

Publication number Publication date
DE3570780D1 (en) 1989-07-06
EP0179248A1 (en) 1986-04-30
ATE43733T1 (en) 1989-06-15

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