EP0254125A1 - Système de signalisation de dangers - Google Patents

Système de signalisation de dangers Download PDF

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Publication number
EP0254125A1
EP0254125A1 EP87109814A EP87109814A EP0254125A1 EP 0254125 A1 EP0254125 A1 EP 0254125A1 EP 87109814 A EP87109814 A EP 87109814A EP 87109814 A EP87109814 A EP 87109814A EP 0254125 A1 EP0254125 A1 EP 0254125A1
Authority
EP
European Patent Office
Prior art keywords
detector
voltage
status
polling
query
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
EP87109814A
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German (de)
English (en)
Other versions
EP0254125B1 (fr
Inventor
Otto-Walter Dipl.-Ing. Moser
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
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT87109814T priority Critical patent/ATE60885T1/de
Publication of EP0254125A1 publication Critical patent/EP0254125A1/fr
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Publication of EP0254125B1 publication Critical patent/EP0254125B1/fr
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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
    • G08B26/005—Alarm systems in which substations are interrogated in succession by a central station with substations connected in series, e.g. cascade

Definitions

  • the invention relates to a hazard alarm system according to the preamble of claim 1.
  • the object of the invention is therefore to shorten the alarm detection time in a hazard alarm system described at the outset.
  • the rapid alarm detection is achieved according to the invention in that the control center executes status polling cycles in quick succession and, in the event of a status change or if there is any other requirement, regular polling cycles. If a change in detector status is detected on a line, a regular polling cycle is then carried out for this line, in which the detector address is also determined. In this context it can also be called an address polling cycle, although this is a conventional pulse detector polling cycle in which both the analog detector measured value and the detector address are recorded.
  • the status query is carried out with a query voltage that differs from the query voltage in the regular query cycle. Accordingly, according to the invention, each detector is additionally provided with a comparison device which switches the subsequent detector on without delay, ie immediately, when the status is queried.
  • the status query according to the invention has the advantage that the alarm detection time is considerably shortened because only a change in status is checked.
  • the query time is therefore independent of the number of detectors per line.
  • the longer regular polling cycle address polling cycle
  • the regular polling cycle is required if control commands are transmitted to certain detectors or control elements which are assigned to certain detectors, as already known from DE-PS 25 33 354.
  • FIG. 1 shows the known connection of the individual detectors M1 to Mn to a detection line ML with the line wire pair a, b at the control center Z.
  • the detectors are connected in a chain and each have a controllable switch ST1, ST2, etc. in the b-wire.
  • ST1, ST2, etc. When the interrogation voltage is applied, the subsequent detectors are switched on to the signaling line with a time delay in normal operation. This is known and need not be explained in detail.
  • a detector according to the invention for the status query is shown in a block diagram in FIG.
  • the circuit is partially known from the conventional pulse detector.
  • a timing element ZG is connected to the detection line, ie to line wire a and line wire b, the duration of which is determined by the measured value of the detector.
  • the analog detector measurement value determines the running time. This switching example is based on a manually operated detector.
  • the detector status depends on the position of switch S1, R corresponds to the rest position, A corresponds to the alarm position and S corresponds to a fault, which each cause different delay times.
  • the output from the timing element ZG causes a current pulse via the transverse transistor TQ and the transverse resistor RQ via the pulse generator IG.
  • This current pulse is measured and evaluated in a known manner in the control center. Furthermore, the output of the timing element ZG controls the switch ST via the OR link OR, which is closed after the timing element ZG has expired and switches the detection line b through to the next detector (b) in a known manner. Normal pulse detectors are connected to the line one after the other and send their measuring current pulses IL one after the other via the detection line a, b to the control center Z.
  • a comparator K is provided in each detector Mi, which immediately closes the switch ST for the status query when the query voltage for the status query is on the message line ML.
  • a reference voltage Uref at the comparator K which is less than the query voltage for the status query.
  • the interrogation voltage UL reaches the second input of the comparator K via the signal line ML. If the voltage on the signal line exceeds the Uref specified at the comparator input, the output of the comparator K emits a signal via the OR gate OR, so that the switch ST is closed and a transfer to the next detector regardless of the running time of the timing element ZG he follows.
  • FIGS 3a and 3b show a voltage and a current diagram.
  • 3a shows the line voltage UL as a function of time t.
  • the line current IL measured in the control center is plotted below the time t accordingly.
  • Each polling cycle begins with the start signal U0, ie the line voltage UL is reduced to the value 0. This short start signal ensures that all detectors are switched off by the signaling line.
  • the interrogation voltage is switched to the signaling line.
  • a query voltage U3 is applied for the status query cycle ZAZ. This query voltage is higher than the query voltage U2 for the regular query cycle RAZ.
  • the reference input Uref of the comparator K in the respective detector (Mi) can be based on the value be set.
  • the switches ST immediately switch through via the OR link OR.
  • the b-wire is connected through to the last detector Mn. All detectors are connected to the alarm line in parallel and all ZG timers start at the same time. Are all detectors in the idle state, they send their measuring current pulses Ii to In simultaneously at the time tR, as shown in FIG. 3b.
  • one detector sends an alarm
  • another detector a fault, i.e. A measuring current pulse I2 comes at time tA
  • another measuring current pulse I3 comes later, at time tS.
  • the other detectors simultaneously emit their quiescent current pulses at time tR. This is shown in Fig.3b.
  • the evaluation device in the control center can distinguish between the alarm, fault and Ruheim pulses, but it cannot recognize the number of the detector (detector address).
  • the relevant detector addresses are determined in the subsequent regular query cycle RAZ1.
  • This regular polling cycle is a completely normal pulse detector polling cycle with the regular polling voltage U2, which is lower than the polling voltage U3 for the state change.
  • the respective comparators do not switch with this voltage on the signal line, i.e. the individual switches STi are only closed after the associated time elements ZGi have expired.
  • the detectors thus send their measuring current pulses one after the other in a known manner.
  • Control signals are transmitted to the detector M2, as is done in a known manner by reducing the voltage to U1.
  • the open circuit voltage UR is connected to the line in a known manner after the query time AZ.
  • This (UR) is greater than the interrogation voltage U3 and serves to supply energy to the detectors, in particular also Charging the energy buffer capacitors provided there.
  • Figure 4 shows an embodiment of the detector according to the invention.
  • the capacitors C1 and C2 discharge, the transistor T3 is blocked. So all detectors are switched off by the reporting line.
  • the timing element ZG consists of the resistors R1, R2, R3, the capacitor C1 and the transistor T1.
  • the capacitor C1 charges in the idle state of the detector via R3, in the alarm state AL, i.e. when the switch S2 is closed, via the parallel connection of R3 and R2.
  • the transistor T1 becomes conductive with a delay.
  • the pulse generator IG which consists of the capacitor C2 and the resistors R4, R5 and the transistor T2, the measuring current pulse Ii is generated via the resistor R6.
  • the (switching through) transistor T3 becomes conductive, which switches the line b on to the next detector.
  • the Zener diode ZD1 With the regular interrogation with the lower interrogation voltage U2, the Zener diode ZD1 remains ineffective.
  • the transistor T3 becomes conductive via the Zener diode ZD1 immediately after the voltage is applied, that is to say regardless of the running time of the timing element.
  • the invention also has the advantage that an alarm detection can be ensured in a simple manner in the case of conventional pulse signaling lines if the central evaluation device fails. It can are only recognized on line alarm, but the alarm triggering detector is not identified. With this status query according to the invention, an alarm can also be recognized if one of the switching transistors T3 or the switch ST remains closed, for example due to a lightning effect. In this case too, alarm detection of the relevant message line is possible.
EP87109814A 1986-07-10 1987-07-07 Système de signalisation de dangers Expired - Lifetime EP0254125B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109814T ATE60885T1 (de) 1986-07-10 1987-07-07 Gefahrenmeldeanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3623295 1986-07-10
DE3623295 1986-07-10

Publications (2)

Publication Number Publication Date
EP0254125A1 true EP0254125A1 (fr) 1988-01-27
EP0254125B1 EP0254125B1 (fr) 1991-02-13

Family

ID=6304878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109814A Expired - Lifetime EP0254125B1 (fr) 1986-07-10 1987-07-07 Système de signalisation de dangers

Country Status (3)

Country Link
EP (1) EP0254125B1 (fr)
AT (1) ATE60885T1 (fr)
DE (1) DE3768019D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404976A1 (fr) * 1989-06-28 1991-01-02 Siemens Aktiengesellschaft Procédé pour la transmission de données dans un agencement de signalisation des risques
EP0491216A2 (fr) * 1990-12-18 1992-06-24 Siemens Aktiengesellschaft Système détecteur de dangers
FR2717287A1 (fr) * 1994-03-09 1995-09-15 Sicli Automatismes Installation de surveillance.
EP2515553A3 (fr) * 2011-04-21 2014-04-30 Phoenix Contact GmbH & Co. KG Système de communication de süreté destiné à la signalisation d'états du système
EP3010000A1 (fr) * 2014-10-17 2016-04-20 Siemens Schweiz AG Système de commande de dispositifs actionnés de sécurité

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534344C1 (de) * 1995-09-15 1997-02-27 Siemens Ag Gefahrenmeldesystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR78472E (fr) * 1960-09-30 1962-07-27 Constr Telephoniques Perfectionnements aux systèmes de télésignalisation et de télécommande
DE2533354B2 (de) * 1975-07-25 1979-01-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen Einrichtung zum Übertragen von Steuerbefehlen in einem Brandschutzsystem
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
GB2168517A (en) * 1984-12-18 1986-06-18 Gent Ltd Information transmission system
EP0185175A2 (fr) * 1984-10-31 1986-06-25 Siemens Aktiengesellschaft Procédé pour la transmission de l'identification des détecteurs dans un système de signalisation de risque

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR78472E (fr) * 1960-09-30 1962-07-27 Constr Telephoniques Perfectionnements aux systèmes de télésignalisation et de télécommande
DE2533354B2 (de) * 1975-07-25 1979-01-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen Einrichtung zum Übertragen von Steuerbefehlen in einem Brandschutzsystem
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
EP0185175A2 (fr) * 1984-10-31 1986-06-25 Siemens Aktiengesellschaft Procédé pour la transmission de l'identification des détecteurs dans un système de signalisation de risque
GB2168517A (en) * 1984-12-18 1986-06-18 Gent Ltd Information transmission system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404976A1 (fr) * 1989-06-28 1991-01-02 Siemens Aktiengesellschaft Procédé pour la transmission de données dans un agencement de signalisation des risques
EP0491216A2 (fr) * 1990-12-18 1992-06-24 Siemens Aktiengesellschaft Système détecteur de dangers
EP0491216A3 (en) * 1990-12-18 1992-12-09 Siemens Aktiengesellschaft Hazard detection system
FR2717287A1 (fr) * 1994-03-09 1995-09-15 Sicli Automatismes Installation de surveillance.
EP2515553A3 (fr) * 2011-04-21 2014-04-30 Phoenix Contact GmbH & Co. KG Système de communication de süreté destiné à la signalisation d'états du système
EP3010000A1 (fr) * 2014-10-17 2016-04-20 Siemens Schweiz AG Système de commande de dispositifs actionnés de sécurité

Also Published As

Publication number Publication date
EP0254125B1 (fr) 1991-02-13
DE3768019D1 (de) 1991-03-21
ATE60885T1 (de) 1991-02-15

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