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EP0090399B1 - Installation de signalisation à courant continu - Google Patents

Installation de signalisation à courant continu Download PDF

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Publication number
EP0090399B1
EP0090399B1 EP83103070A EP83103070A EP0090399B1 EP 0090399 B1 EP0090399 B1 EP 0090399B1 EP 83103070 A EP83103070 A EP 83103070A EP 83103070 A EP83103070 A EP 83103070A EP 0090399 B1 EP0090399 B1 EP 0090399B1
Authority
EP
European Patent Office
Prior art keywords
signalling
line
resistance value
switch
signalling line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83103070A
Other languages
German (de)
English (en)
Other versions
EP0090399A1 (fr
Inventor
Dirk Dipl.-Ing. Gesenhues
Karheinz Ing. Schreyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT83103070T priority Critical patent/ATE23759T1/de
Publication of EP0090399A1 publication Critical patent/EP0090399A1/fr
Application granted granted Critical
Publication of EP0090399B1 publication Critical patent/EP0090399B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • G08B25/018—Sensor coding by detecting magnitude of an electrical parameter, e.g. resistance

Definitions

  • DC systems for fire protection, emergency calls or other hazard monitoring devices, such as intrusion protection, are widespread because they require little effort.
  • detectors are connected in parallel to each detector line, which generally consists of a two-wire line and is also referred to as an alarm loop.
  • the detection line has an end link, e.g. a resistance, completed.
  • the connection resistor provides a quiescent current, via which the line is monitored.
  • the alarm device changes its resistance and thus the total resistance of the line.
  • the increasing or decreasing current is considered an alarm criterion. In the control center, however, it is generally not possible to determine which detector of the detector line has triggered the alarm in the known systems.
  • a control device is also provided in the control center, which connects various direct voltages to the conductor loop in order to eliminate the pure line resistance in the respective detector by means of the voltage limiter circuit.
  • Such a hazard alarm system has the disadvantage that the control center has a complex and complicated circuit arrangement, that different direct voltages have to be switched on or over to the conductor loop in order to determine the pure line resistance and to subtract it from the total resistance of the conductor loop.
  • the individual detectors have a complicated circuit arrangement with a large number of components.
  • DE-OS 2 611 145 describes an alarm system with a control device designed as a balanced bridge, which is equipped to protect a number of objects with the sensors associated with the objects, which are arranged with resistors in at least one current loop.
  • a known detector circuit described there only has an alarm contact and, in series therewith, a resistor which is arranged in the conductor loop.
  • several similar detectors can be arranged in series in the conductor loop.
  • An additional detector or sensor is formed by a simple work contact, which is transverse to the conductor loop.
  • a downstream control device can only detect a change in resistance and thus display an alarm.
  • this arrangement has the disadvantage that the triggering detector cannot be recognized.
  • DE-OS2939462 also discloses a method for identifying individual detectors in intrusion or fire detection systems, in which the respective lines are queried for their resistance value and compared with stored resistance setpoints for the individual detectors in the event of an alarm or sabotage. The response of the relevant detector is displayed.
  • the disadvantage here is an elaborate circuit arrangement in the control center with several switch groups for switching the line voltage on and the comparison and logic elements.
  • the individual detectors have a number of components which make the detector complex and cost-intensive.
  • the object of the invention is to improve a direct current alarm system, in particular an intruder alarm system of the type described at the outset, in such a way that the measuring and evaluation device in the control center and the individual detectors are distinguished by a relatively simple circuit arrangement.
  • the triggering detector should be able to be displayed directly.
  • the detectors connected to the two-wire detection line only have a series resistor that is in series in the detection line and a detector switch that is connected directly between the two wires of the detection line and is closed in the event of an alarm.
  • the detection line thus forms a conductor loop with fixed resistors connected in series.
  • the respective detection line has a certain total resistance, which is essentially the sum of the connected detectors or their Resistors are formed.
  • the response of a detector changes the total resistance of the detector line.
  • the response of a specific detector results in a very specific change in resistance, because the specific detector short-circuits the detector line, so that only the detectors between the control center and the specific detector contribute to the current total resistance of the line, ie the detector line.
  • the measuring and evaluation device arranged in the control center has a window discriminator assigned to each detector, at the reference input of which there is a reference voltage which corresponds to the measuring voltage of the resistance value of the detection line when the detector in question has been triggered.
  • the individual window criminals form a number of voltage windows.
  • a triggering detector with the characteristic resistance value of the detection line, causes a corresponding measurement voltage, which is fed to the respective measurement input of the window discriminators. As a result, the triggering of a particular detector is recognized and displayed because the output of each individual window discriminator leads to a respective display device.
  • the hazard alarm system according to the invention does not require different DC voltages that have to be switched over or on. Likewise, no complex detectors are required. A large number of detectors of the same design, with only a few switching elements, are connected to one detector line. Eliminating the line resistance is not necessary.
  • a further window discriminator can be provided, the reference voltage of which corresponds to a resistance value of the signal line that occurs when the line is disturbed, for example due to a line interruption or a short circuit in the signal line between the control center and the first detector.
  • an alarm line is connected to the center Z.
  • the individual detectors MI to Mn are connected to the detection line ML.
  • the resistance R of the individual detector is connected in series in the detection line.
  • the signaling switch S is shown here as a simple switching contact. It is arranged parallel to the detection line and open when it is quiet. In this case, the signaling switch is arranged from the control center Z in front of the signaling resistor R, so that the signaling line ends at the end with a short-circuit EG.
  • FIG. 1 A modified detector circuit is shown in FIG.
  • the ML detection line is connected to the control center.
  • Several detectors MI to Mn are connected to the ML detection line.
  • the detector resistor R is again connected in series to the detection line as in FIG. 1.
  • the detector switch S is arranged after the detector resistor R parallel to the ML detector line.
  • the detection line is terminated with a terminating resistor RL as the end element. If a detector responds, for example detector M2, the signaling switch S is closed. As a result, the detector line is short-circuited after detector resistance R of detector 2. The detectors behind it are therefore ineffective.
  • the total resistance of the signaling line is changed suddenly, in this case reduced, and the instantaneous, according to the switching example, the total resistance of the signaling line formed by the detectors M1 and M2 is determined.
  • the detector that has responded can be identified from this resistance value.
  • FIG. 3 the central office Z is indicated, from which the reporting lines depart. Only one detection line ML is shown in FIG. 3.
  • the alarm line monitoring is located in the control center and can be periodically connected to the respective alarm line, for example.
  • a measuring device ME which determines the instantaneous resistance value of the detection line, is connected to the detection line ML.
  • This measuring device ME is connected to an evaluation device AW, which in turn has a display downstream device ANZ on which the detector (eg M1) is displayed (LD1) that triggered the alarm.
  • LD1 display downstream device ANZ on which the detector (eg M1) is displayed
  • a fault for example if a short circuit or line break occurs on the line, is also indicated (LDS).
  • a series of window discriminators are provided in the central measuring and evaluation device (ME, AW) according to the invention for evaluating the currently measured detection line measured values, as shown in FIG. 4.
  • Each detector (Ml to Mn) is assigned a window discriminator DI to Dn.
  • the voltage corresponding to the resistance value of the detection line ML is fed to the respective measurement input of the row of discriminators DO to Dn.
  • the number of discriminators is one more than the corresponding number of detectors which are connected to a line ML.
  • the response of the individual detector can be determined and displayed directly (ANZ MI to ANZ Mn).
  • a line fault e.g. Line interruption or short circuit between the control center and the first detector shown in FIG. 2
  • the individual detectors have a simple circuit arrangement, as shown in FIGS. 1 and 2.

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

Claims (5)

1. Installation de signalisation à courant continu comportant au moins une ligne bifilaire de signalisation (ML), partant d'un central (Z) et à laquelle sont raccordés respectivement plusieurs dispositifs de signalisation (MI à Mn) comportant au moins une résistance série (R) située dans la ligne de signalisation (ML) et un commutateur de signalisation (S) monté en parallèle sur la ligne de signalisation (ML) et à l'aide duquel la valeur de résistance est modifiable de façon brusque, et dans laquelle il est prévu dans le central (Z), pour la détermination de la valeur de résistance instantanée de la ligne respective de signalisation (ML), un dispositif de mesure (ME) et un dispositif d'exploitation (AW) branché en aval de ce dispositif de mesure et qui détermine le dispositif de signalisation déclenchant l'alarme, à partir de valeurs comparatives, correspondant à la valeur de résistance instantanée de la ligne respective de signalisation (ML) et à partir du déclenchement des différents dispositifs de signalisation, caractérisée par le fait que chaque dispositif de signalisation (MI à Mn) ne comporte qu'une résistance (R) branchée en série dans la ligne de signalisation (ML), que le commutateur de signalisation (M) est branché directement entre les deux fils de la ligne de signalisation (ML), qu'un discriminateur à fenêtre (DI à Dn) est associé, dans le dispositif de mesure et d'exploitation (MT/AW), à chaque dispositif de signalisation (MI à Mn), auquel cas la valeur comparative correspondant au déclenchement du dispositif de signalisation (MI à Mn) associé et formée par une tension de comparaison appliquée à l'entrée de référence, et une tension correspondant à la valeur de résistance de la ligne de signalisation est envoyée à l'entrée de mesure, et que la sortie de chaque discriminateur à fenêtre (DI à Dn) est reliée à un dispositif d'affichage (ANZI à ANZn).
2. Installation de signalisation à courant continu selon la revendication 1, caractérisée par le fait que, lorsqu'on regarde à partir du central (Z), le commutateur de signalisation (S) est disposé, dans chaque dispositif de signalisation (MI à Mn), en amont de la résistance série (R) et que chaque ligne de signalisation (ML) est fermée par un court-circuit.
3. Installation de signalisation à courant continu suivant la revendication 1, caractérisée par le fait que lorsqu'on regarde à partir du cental (Z), le commutateur de signalisation (S) est disposé, dans chaque dispositif de signalisation (MI à Mn), en aval de la résistance série (R) et que chaque ligne de signalisation (ML) est fermée par une résistance de terminaison (RL).
4. Installation de signalisation à courant continu suivant l'une des revendications 1 à 3, caractérisée par le fait que chaque dispositif de signalisation (MI à Mn) possède des composants (R, S) identiques possédant des valeurs identiques.
5. Installation de signalisation à courant continu, suivant l'une des revendications 1 à 4, caractérisée par le fait qu'il est prévu au moins un autre discriminateur à fenêtre (DO), dont la tension de comparaison correspond à une valeur de résistance apparaissant dans le cas d'une perturbation de la ligne.
EP83103070A 1982-03-29 1983-03-28 Installation de signalisation à courant continu Expired EP0090399B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83103070T ATE23759T1 (de) 1982-03-29 1983-03-28 Gleichstrommeldeanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3211550A DE3211550C2 (de) 1982-03-29 1982-03-29 Gleichstrommeldeanlage
DE3211550 1982-03-29

Publications (2)

Publication Number Publication Date
EP0090399A1 EP0090399A1 (fr) 1983-10-05
EP0090399B1 true EP0090399B1 (fr) 1986-11-20

Family

ID=6159615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103070A Expired EP0090399B1 (fr) 1982-03-29 1983-03-28 Installation de signalisation à courant continu

Country Status (3)

Country Link
EP (1) EP0090399B1 (fr)
AT (1) ATE23759T1 (fr)
DE (1) DE3211550C2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
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JPS6292720A (ja) * 1985-10-16 1987-04-28 住友電気工業株式会社 バスダクト接続部の異常過熱検出装置
DE3620681A1 (de) * 1986-06-20 1987-12-23 Merk Gmbh Telefonbau Fried Schaltungsanordnung zur identifizierung von gefahrenmeldern
DE3719988A1 (de) * 1987-06-15 1988-12-29 Total Feuerschutz Gmbh Einzelidentifikation
GB8825907D0 (en) * 1988-11-04 1988-12-07 Process Computing Ltd Signalling system
GB2312752A (en) * 1996-05-01 1997-11-05 Smiths Industries Plc Aircraft temperature monitoring
US5831546A (en) * 1996-05-10 1998-11-03 General Signal Corporation Automatic addressing in life safety system
DE19940700C2 (de) * 1999-08-27 2003-05-08 Job Lizenz Gmbh & Co Kg Verfahren und Vorrichtung zur automatischen Zuweisung von Melderadressen bei einer Gefahrenmeldeanlage
DE10310250A1 (de) * 2003-03-04 2004-11-25 Valeo Schalter Und Sensoren Gmbh Verfahren zur Identifizierung einer elektronischen Einheit
RU2368015C1 (ru) * 2008-01-09 2009-09-20 Общество с ограниченной ответственностью Научно-производственное объединение "Сибирский Арсенал" Способ контроля состояния и целостности шлейфа
US7999668B2 (en) 2008-11-17 2011-08-16 GM Global Technology Operations LLC Series interlock system with integrated ability to identify breached locations
EP3499250B1 (fr) * 2011-09-22 2021-08-04 ZTE Corporation Procédé et dispositif d'identification de redresseur
CN103489277B (zh) * 2013-09-26 2015-08-26 胡亨华 在线监控电气线路电阻参数的火灾预警系统
WO2015137896A1 (fr) * 2014-03-10 2015-09-17 Kocsistem Bilgi Ve Iletisim Hizmetleri Anonim Sirketi Procédé de transmission de données sur des réseaux de capteurs par consommation de charge régulée

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH586439A5 (fr) * 1975-06-03 1977-03-31 Bbc Brown Boveri & Cie
DE2611145A1 (de) * 1976-03-17 1977-09-22 Grothe & Soehne Kg A Alarmanlage mit als abgeglichene bruecke ausgebildeter kontrollvorrichtung
US4152696A (en) * 1977-11-16 1979-05-01 Lectrolarm Custom Systems, Inc. Multi-function control circuit
DE2907749C2 (de) * 1979-02-28 1985-04-25 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Einrichtung zur Minimierung von Konstanthaltung des bei Axialturbinen von Gasturbinentriebwerken vorhandenen Schaufelspitzenspiels
DE2935335C2 (de) * 1979-08-31 1985-08-08 Siemens AG, 1000 Berlin und 8000 München Gleichstrommeldeanlage
DE2939494B2 (de) * 1979-09-28 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung für Einbruch- oder Feuermeldea nlagen
DE2939462C2 (de) * 1979-09-28 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Verfahren und Einrichtung zur Identifizierung einzelner Melder in Einbruch- oder Brandmeldeanlagen

Also Published As

Publication number Publication date
ATE23759T1 (de) 1986-12-15
DE3211550C2 (de) 1985-02-14
DE3211550A1 (de) 1983-10-13
EP0090399A1 (fr) 1983-10-05

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