EP0224819A1 - Système de signalisation de danger - Google Patents

Système de signalisation de danger Download PDF

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Publication number
EP0224819A1
EP0224819A1 EP86116172A EP86116172A EP0224819A1 EP 0224819 A1 EP0224819 A1 EP 0224819A1 EP 86116172 A EP86116172 A EP 86116172A EP 86116172 A EP86116172 A EP 86116172A EP 0224819 A1 EP0224819 A1 EP 0224819A1
Authority
EP
European Patent Office
Prior art keywords
line
detector
alarm
time
signaling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86116172A
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German (de)
English (en)
Other versions
EP0224819B1 (fr
Inventor
Peer Dr.-Ing. Thilo
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6286880&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0224819(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT86116172T priority Critical patent/ATE60682T1/de
Publication of EP0224819A1 publication Critical patent/EP0224819A1/fr
Application granted granted Critical
Publication of EP0224819B1 publication Critical patent/EP0224819B1/fr
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
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/005—Alarm systems in which substations are interrogated in succession by a central station with substations connected in series, e.g. cascade

Definitions

  • Such a hazard alarm system is known from DE-PS 25 33 382.
  • a fire alarm system is described there, in which the individual detectors of a detection line according to the so-called pulse detection technology, with the aid of chain synchronization when the detector is queried, each cause a current increase on the relevant detection line in chronological order.
  • a switching transistor is arranged in one of the two wire lines of a signaling line and is operated in one direction.
  • a fault occurs on a signaling line, for example in the form of a line interruption
  • the subsequent detectors of the relevant signaling line can no longer be queried.
  • Such a fault is recognized and displayed in the control center.
  • no alarms from the subsequent detectors can be recognized and reported until the damage has been remedied.
  • Various measures have already been proposed so that any alarms that occur during this time are not lost.
  • One possibility is to design the signaling line as a signaling loop, but this is not readily possible in the case of a hazard detection system described at the beginning, because the individual switching transistors can only be operated in one direction.
  • a second evaluation device In order to query a signaling loop in a signaling system that works on the principle of chain synchronization from the other end, a second evaluation device would have to be provided in the control center and switching measures would also have to be taken to enable the individual detectors to be queried from the other direction . This is complex and very expensive both for the evaluation center and for the individual detectors.
  • the object of the invention is therefore to avoid these disadvantages and to improve a hazard detection system described at the outset with relatively little circuitry such that the functional reliability of the system is ensured even when the signaling line is interrupted and the risk of failure is thus reduced.
  • the time from the application of the interrogation voltage to the occurrence of the line current increase is measured and from this it is derived whether the faulty signal line is at rest or whether an alarm of a detector has occurred, because in the case of an alarm condition the time is shorter than the time of the at rest reporting line.
  • An alarm caused by a detector on the faulty signal line is then displayed as a line alarm. It is not possible to individually identify the detector (s) triggering the alarm if the signal line is interrupted.
  • the line end of each signal line can also be switched between the polling cycles, that is to say in the idle phases, to the evaluation device of the control center and thus to the supply voltage for the signal line, even in the case of trouble-free operation.
  • This has the advantage that the individual detectors can be supplied with an additional supply current in the idle phase. This is particularly advantageous if one or more detectors have gone into the alarm state and then the correspondingly assigned alarm indicators, indicator lamps, have to be supplied with energy.
  • the semiconductor diode can be formed by a zener diode. This has the advantage that the switching transistor is protected against overvoltages during undisturbed operation.
  • the signaling line has two line wires a and b.
  • the controllable switching transistor S1 to S3 is arranged in the second line wire b in each detector.
  • the signal line is connected with its start A to a control center Z, not shown here.
  • the message line ML should be interrupted after the first detector M1. This is marked with a U.
  • the signal line ML is connected with its start A to the control center and with its end E also to the control center and can be switched over from the control center to the control center or evaluation device via a switchover device, as indicated in FIG. 6.
  • each switching transistor S1 to S3 has a diode D1 to D3 connected in parallel in the reverse direction.
  • the report Line ML is interrupted after the first detector M1.
  • the evaluating center recognizes that a signaling line has a fault. This is displayed in the headquarters.
  • the line current IL E measured from the end (E) of the signal line (ML) is plotted against the time t.
  • the interrogation voltage is applied at time TS, a certain current flows for time t R.
  • all detectors here the detectors M2 and M3, after the interruption (U) here the detectors M2 and M3, simultaneously cause a sudden increase in current, namely I2 + I3.
  • the corresponding time t R or t A is also measured. This measured time is shorter if a detector has gone into the alarm state.
  • the time is shortened from the time TS of switching on the signal line for the purpose of the query to the occurrence (time TA) of the current pulse I2 of the alarm-triggering detector M2. This is shown in Fig.5.
  • the line current diagram IL E according to FIG. 5 for the signaling line with the end (E) switched on at the control center shows that after a shorter time t A , that is to say at the time TA, the line current IL E caused by the alarm triggering detector M2 around the value I2 increases. This is recognized and displayed in the evaluation device as an alarm on the relevant message line.
  • the detection line is queried from the other side E, that is to say in the event of a line break, does the current flow through the respective diodes, so that the detectors are supplied with voltage at the same time. Only a detector that has gone into the alarm state causes a current rise earlier, as just explained. In this way it is determined in the control center that at least one detector in the interrupted signal line is in the alarm state.
  • the connection of the signaling loop to the control center is shown schematically in FIG.
  • the control center Z has the connection terminals a and b, to which the message loop is only switched on or switched using the example of a message loop.
  • a switching device US which can be formed, for example, by a relay, is connected to the terminals a and b.
  • About a tax Line SL is controlled from the control center Z from the switchover device US.
  • the signaling loop can be connected to the switchover device US at its start A and at the other end E at the line wires a and b. If the control center Z detects a line interruption (U), the switch US is triggered via the control line SL to switch a and b from the connection side A to the connection side E of the signaling loop.
  • U line interruption

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
EP86116172A 1985-11-26 1986-11-21 Système de signalisation de danger Expired - Lifetime EP0224819B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116172T ATE60682T1 (de) 1985-11-26 1986-11-21 Gefahrenmeldeanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541770 1985-11-26
DE3541770 1985-11-26

Publications (2)

Publication Number Publication Date
EP0224819A1 true EP0224819A1 (fr) 1987-06-10
EP0224819B1 EP0224819B1 (fr) 1991-01-30

Family

ID=6286880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116172A Expired - Lifetime EP0224819B1 (fr) 1985-11-26 1986-11-21 Système de signalisation de danger

Country Status (3)

Country Link
EP (1) EP0224819B1 (fr)
AT (1) ATE60682T1 (fr)
DE (1) DE3677339D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664408A1 (fr) * 1990-07-04 1992-01-10 Spie Trindel Installation de surveillance et d'alarme.
EP0503122A1 (fr) * 1991-03-14 1992-09-16 Siemens Aktiengesellschaft Arrangement pour commuter des lignes primaires en cas de perturbations
WO2012045997A1 (fr) * 2010-10-04 2012-04-12 Thorn Security Limited Circuit séparateur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832678A (en) * 1970-11-12 1974-08-27 B Gysell Fire alarm system
DE2533382C2 (de) * 1975-07-25 1980-07-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren und Einrichtung zur Übertragung von Meßwerten in einem Brandmeldesystem
FR2550642A1 (fr) * 1983-08-08 1985-02-15 Pittway Corp Systeme de surveillance d'interrupteurs en serie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832678A (en) * 1970-11-12 1974-08-27 B Gysell Fire alarm system
DE2533382C2 (de) * 1975-07-25 1980-07-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren und Einrichtung zur Übertragung von Meßwerten in einem Brandmeldesystem
FR2550642A1 (fr) * 1983-08-08 1985-02-15 Pittway Corp Systeme de surveillance d'interrupteurs en serie

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664408A1 (fr) * 1990-07-04 1992-01-10 Spie Trindel Installation de surveillance et d'alarme.
EP0503122A1 (fr) * 1991-03-14 1992-09-16 Siemens Aktiengesellschaft Arrangement pour commuter des lignes primaires en cas de perturbations
WO2012045997A1 (fr) * 2010-10-04 2012-04-12 Thorn Security Limited Circuit séparateur
US9153968B2 (en) 2010-10-04 2015-10-06 Thorn Security Limited Isolator circuit
US9673615B2 (en) 2010-10-04 2017-06-06 Tyco Fire & Security Gmbh Isolator circuit
US10069293B2 (en) 2010-10-04 2018-09-04 Tyco Fire & Security Gmbh Isolator circuit
EP2625677B1 (fr) * 2010-10-04 2019-03-06 Tyco Fire & Security GmbH Circuit séparateur
EP3477610A1 (fr) * 2010-10-04 2019-05-01 Tyco Fire & Security GmbH Circuit d'isolement
EP3477609A1 (fr) * 2010-10-04 2019-05-01 Tyco Fire & Security GmbH Circuit d'isolateur

Also Published As

Publication number Publication date
DE3677339D1 (de) 1991-03-07
ATE60682T1 (de) 1991-02-15
EP0224819B1 (fr) 1991-01-30

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