EP0295593B1 - Einzelidentifikation - Google Patents

Einzelidentifikation Download PDF

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Publication number
EP0295593B1
EP0295593B1 EP88109332A EP88109332A EP0295593B1 EP 0295593 B1 EP0295593 B1 EP 0295593B1 EP 88109332 A EP88109332 A EP 88109332A EP 88109332 A EP88109332 A EP 88109332A EP 0295593 B1 EP0295593 B1 EP 0295593B1
Authority
EP
European Patent Office
Prior art keywords
line
detector
detectors
arrangement
signalling
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 - Lifetime
Application number
EP88109332A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0295593A2 (de
EP0295593A3 (en
Inventor
Hans-Joachim Rusch
Reinhold Lehmann
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.)
Total Walther Feuerschutz GmbH
Total Feuerschutz GmbH
Original Assignee
Total Walther Feuerschutz GmbH
Total Feuerschutz GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Total Walther Feuerschutz GmbH, Total Feuerschutz GmbH filed Critical Total Walther Feuerschutz GmbH
Priority to AT88109332T priority Critical patent/ATE96930T1/de
Publication of EP0295593A2 publication Critical patent/EP0295593A2/de
Publication of EP0295593A3 publication Critical patent/EP0295593A3/de
Application granted granted Critical
Publication of EP0295593B1 publication Critical patent/EP0295593B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • 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
    • 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 an individual identification of a plurality of detectors arranged in a double-wire detection line with closable contacts, in particular fire detectors in fire detection systems.
  • Such direct current detection systems are known as intrusion detection systems (DE-A-32 11 550), in which the individual detectors of a detection line can be identified when an alarm is triggered. A short circuit in the message line also triggers an alarm. As a result, such systems are not permitted due to regulations in a fire alarm system.
  • DE-A-2 154 537 discloses the use of diodes and the inverting of the line voltage for short-circuit detection. However, the structure of the Meider arrangement described there does not allow the location of a short circuit.
  • Optical displays arranged on detectors are relatively inexpensive to implement. However, in extensive systems, for example with 100 or more detectors, the search for a visual display of an addressed detector is quite time-consuming. Other systems lead a line from each signaling contact to a central point. This enables quick identification; however, the installation effort is considerable for such a system.
  • the invention has for its object to avoid the above disadvantages and to create an individual display that can be realized with the simplest means and reliably.
  • the value of the terminating resistor is measured when the line voltage is inverted, the previous value is a closed signal contact; this leads to the corresponding output signal and the measured resistance value is displayed as a signal location and displayed as a number.
  • the price for the two additional components installed in the detector is only a fraction of the price for the detector. Installation is extremely simple and interference-free. Each reporting location is e.g. using a site plan with numbers to locate it immediately when the message signal appears.
  • Such a device is ideally suited for monitoring slide positions, as are required for sprinkler systems.
  • Extinguishing systems in which shrinkage detectors are required for extinguishing agents can also be implemented cost-effectively.
  • the invention has the further advantage that the individual detectors do not have to be set individually on the construction site.
  • a slide-in module can be used which, in addition to the usual displays for system faults and line faults, contains a digital display that shows the number of the signaling contact addressed in the event of a system fault.
  • Each insert can monitor several detectors. The usual double wire is sufficient for the connection between the control panel and the detectors.
  • the exemplary embodiment shows a fire alarm system which consists on the one hand of an alarm line L and on the other hand of a fire alarm system Z.
  • the signal line L with the cores BC is terminated by the end line E with the terminating resistor RE.
  • a current flows through the signal line L and is determined by the constant current generator F.
  • This voltage is fed to the voltage measurement G and, via a comparator chain Q with the comparators KUA, to an evaluation circuit N.
  • the built-in detector contact S closes. This changes the number of detector resistors RM connected in series and thus also the total resistance of the signal line L through which the constant current flows.
  • the evaluation N is controlled via the comparator A of the comparator chain Q, so that an alarm message via P is issued.
  • the voltage measurement G and the message display H are activated. A number appears in the display H; this number depends on the measured voltage. Since this in turn depends on the number of resistors RM connected in series in the signal line L at the time of the alarm, this number can serve as identification of the addressed detector M.
  • the conversion of the measured voltage into the display digit is expediently designed such that a "1" is synonymous with the first detector M arranged in the message line L, and a "2" is the same as the second detector. This ensures that all detectors M have identical resistance RM and that no adjustment is necessary after the installation or expansion of a detection line.
  • the alarm message sent via P can, for example, open an alarm valve of a sprinkler system and thus start the extinguishing process in the event of a fire via the sprinkler system.
  • a diode D is connected in series with each signaling contact.
  • the feed of the signal line L is periodically inverted in polarity by an inverter I.
  • an inverter I In normal operation of the signal line L, a direct voltage which is interrupted only by the changeover time of the pole inverter operated by the inverter I is present on the comparator chain Q.
  • the value of this voltage is essentially determined by the resistor RE, the value of which is greater than the sum of all the resistances RM which are possible in a detection line. In the event of a line break, no current flows through this terminating resistor RE.
  • An interference signal is emitted via O via the comparator U of the comparator chain Q and the evaluation N. If the signal line L is short-circuited, the line voltage will drop due to the then bridged resistor RE and possibly a part of the resistor RM. This causes the comparator K of the comparator chain Q to respond and an error message to be issued.
  • the line voltage which thus fluctuates periodically, triggers the comparator A of the comparator chain Q and, via the evaluation N, releases the voltage measurement G with the subsequent message display in H.
  • only two passive components are required in the mutually identical detectors in order to signal the required individual display of the actuated detector. Also, if the number of detectors M in a detection line L is subsequently changed, no adjustment of the central station Z or manipulation of the detectors M is necessary.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Vending Machines For Individual Products (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
EP88109332A 1987-06-15 1988-06-11 Einzelidentifikation Expired - Lifetime EP0295593B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88109332T ATE96930T1 (de) 1987-06-15 1988-06-11 Einzelidentifikation.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719988 1987-06-15
DE19873719988 DE3719988A1 (de) 1987-06-15 1987-06-15 Einzelidentifikation

Publications (3)

Publication Number Publication Date
EP0295593A2 EP0295593A2 (de) 1988-12-21
EP0295593A3 EP0295593A3 (en) 1989-08-30
EP0295593B1 true EP0295593B1 (de) 1993-11-03

Family

ID=6329765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109332A Expired - Lifetime EP0295593B1 (de) 1987-06-15 1988-06-11 Einzelidentifikation

Country Status (5)

Country Link
US (1) US4833451A (enrdf_load_stackoverflow)
EP (1) EP0295593B1 (enrdf_load_stackoverflow)
AT (1) ATE96930T1 (enrdf_load_stackoverflow)
AU (1) AU597203B2 (enrdf_load_stackoverflow)
DE (1) DE3719988A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0744937B2 (ja) * 1986-12-12 1995-05-17 而至歯科工業株式会社 歯冠修復用複合冠
DE4030533A1 (de) * 1990-09-27 1992-04-02 Bosch Gmbh Robert Anordnung zur ueberwachung eines verbrauchers in verbindung mit einer brennkraftmaschine bzw. einem kraftfahrzeug
US5512890A (en) * 1992-02-19 1996-04-30 Namco Controls Corporation Sensor connection system
DE4210848A1 (de) * 1992-02-19 1993-08-26 Beckhausen Karlheinz Sicherheitseinrichtung
US5440293A (en) * 1992-05-29 1995-08-08 Pittway Corporation Detector supervision apparatus and method
GB2312752A (en) * 1996-05-01 1997-11-05 Smiths Industries Plc Aircraft temperature monitoring
GB9609046D0 (en) * 1996-05-01 1996-07-03 Smiths Industries Plc Aircraft temperature monitoring
EP2804163B1 (de) * 2013-05-17 2015-09-16 Minimax GmbH & Co KG Verfahren und Vorrichtung zur Störungserkennung auf Steuerleitungen in Gefahrenmelde- und Steuerungssystemen
ES3005091T3 (en) 2021-04-05 2025-03-13 Carrier Corp Fire system with current response calibration

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE402660B (sv) * 1970-11-12 1978-07-10 Securitas Int Ab Brandalarmanleggning
DE2923899A1 (de) * 1979-06-13 1980-12-18 Merk Gmbh Telefonbau Fried Schaltungsanordnung fuer ruhestrom-ueberwachte meldeleitungen
DE2935335C2 (de) * 1979-08-31 1985-08-08 Siemens AG, 1000 Berlin und 8000 München Gleichstrommeldeanlage
US4435698A (en) * 1980-06-11 1984-03-06 Hekatron Gmbh Circuit arrangement for the transmission of measurements to a central, especially in a fire alarm system
DE3127324A1 (de) * 1981-07-10 1983-01-27 Siemens AG, 1000 Berlin und 8000 München Verfahren und anordnung zur erhoehung der ansprechempfindlichkeit und der stoersicherheit in einer gefahren-, insbesondere brandmeldeanlage
DE3211550C2 (de) * 1982-03-29 1985-02-14 Siemens AG, 1000 Berlin und 8000 München Gleichstrommeldeanlage
US4567471A (en) * 1983-08-08 1986-01-28 Pittway Corporation Monitoring system
US4549168A (en) * 1983-10-06 1985-10-22 Ryszard Sieradzki Remote station monitoring system

Also Published As

Publication number Publication date
US4833451A (en) 1989-05-23
EP0295593A2 (de) 1988-12-21
DE3719988C2 (enrdf_load_stackoverflow) 1992-06-17
AU1693988A (en) 1988-12-15
ATE96930T1 (de) 1993-11-15
AU597203B2 (en) 1990-05-24
EP0295593A3 (en) 1989-08-30
DE3719988A1 (de) 1988-12-29

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