EP0042501A1 - Dispositif pour la transmission des valeurs mesurées dans un système d'avertissement d'incendie - Google Patents

Dispositif pour la transmission des valeurs mesurées dans un système d'avertissement d'incendie Download PDF

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Publication number
EP0042501A1
EP0042501A1 EP81104115A EP81104115A EP0042501A1 EP 0042501 A1 EP0042501 A1 EP 0042501A1 EP 81104115 A EP81104115 A EP 81104115A EP 81104115 A EP81104115 A EP 81104115A EP 0042501 A1 EP0042501 A1 EP 0042501A1
Authority
EP
European Patent Office
Prior art keywords
detector
fire
line
measured value
detectors
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
EP81104115A
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German (de)
English (en)
Other versions
EP0042501B1 (fr
Inventor
Peter Müller
Eugen Schibli
Andreas Scheidweiler
Jürg Muggli
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.)
Cerberus AG
Original Assignee
Cerberus 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 Cerberus AG filed Critical Cerberus AG
Priority to AT81104115T priority Critical patent/ATE13231T1/de
Publication of EP0042501A1 publication Critical patent/EP0042501A1/fr
Application granted granted Critical
Publication of EP0042501B1 publication Critical patent/EP0042501B1/fr
Expired 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion

Definitions

  • the invention relates to a method for the transmission of M ess sauce in a fire alarm system, said fire detectors form of a chain of individual lying on signal lines given determined measurement values to a central signal station and linked there to obtain differentiated fault or alarm messages.
  • DE-AS 2'533'382 proposed a method for transmitting measured values in a fire alarm system, in which the measured values determined by individual fire detectors lying in chains on the detection lines are passed analogously to a signaling center and differentiated there for gain Fault or alarm messages are linked, with all fire detectors being disconnected from the detection line by a voltage change at the beginning of each query cycle and then switched on again in a predetermined order in such a way that each fire detector additionally switches on the subsequent fire detector after a time delay corresponding to its measured value the line voltage is switched on and that in the signaling center the respective detector address is derived from the number of previous increases in the line current and the measured value from the length of the switching delay in question.
  • the installation of the serial detector has to be more expensive to ensure that the detectors are connected correctly. Even if one speaks of a two-wire system, the detector still has three terminals and you have to make sure that the incoming and outgoing wire are not interchanged. Compared to the classic In installation technology of two-wire systems an aggravation and also a source of error.
  • the number of detectors per line is limited by the resistance of the switches connected in series.
  • the object of the invention is to provide a method of transmitting measured values in a fire alarm system and a device for implementing the method which avoid the aforementioned disadvantages, the transmission means of measured values also allow when a B edge detector fails in a signal line or a detector line is interrupted or short-circuited, which also allows the fire detectors to be connected to the detection lines without having to take care that the entry and exit of the detection line are not interchanged and which ultimately allow a higher current to be sent through the detection lines or to connect a larger number of fire detectors to the detection line.
  • this is achieved in that the detection lines are returned from the last fire detector of a line to the signaling center and that, in the absence of detector signals, the interrogation direction for the affected detection line is reversed. This ensures that in the event of a lead accident or failure of a detector, the rest of the fire detectors in this detection line can still be used to signal.
  • the detection lines After the measurement value of the last detector of a line has been transmitted, current is fed into the detection lines from both sides.
  • the two-sided connection of the detection lines ensures that the electricity used to power the fire detectors can be practically quadrupled.
  • the measured values are transmitted in the delay time between two detector connections, the time delay is not dependent on the measured value and remains constant.
  • the measured value is converted into a coded pulse train or an AC signal whose frequency depends on the measured value. It goes without saying that the duration of the measured value signal must be shorter than the delay time.
  • a device for carrying out the method according to the invention consists of a sensor which is sensitive to fire parameters, a transducer, a timer and a bidirectional switch which switches the next fire detector to the detection line.
  • Signaling lines L 1 ... Li emanate from the signaling center Z from the terminals K la ... K ia .
  • the M 11 ... M 1m fire detectors are connected to each of these lines.
  • the M 11 ... M 1m fire detectors essentially contain a measured value converter, a timer and a bidirectional switch S. From the last fire detector of a detection line, two lines are fed back to the terminals K lx ... K ix of the signal center Z. . After applying the line voltage to the terminals K 1a , a timer starts to run in the M 11 detector. After a certain delay, the switch S 11 closes and applies the line voltage to the detector M 12 ', where a timer also starts to run again. In this way, all the switches of the detectors in a zone close one after the other. This process can be repeated periodically so that the fire detectors of a detection line are polled cyclically. After the line voltage has been applied to a detector or the relevant switch has been closed, the measured values from the sensor can be transmitted to the signaling center.
  • the detector line evaluation circuit of the signal center Z is connected to the terminals K ia of the lines concerned.
  • the occurrence of a line fault or the failure of a detector is detected in the signal center Z by the fact that the polling cycle stops.
  • the detector line evaluation circuit is automatically switched to the Kix terminals of the relevant detector lines.
  • the fire detectors are now interrogated in the opposite direction to the disturbed point.
  • FIG. 2 shows the circuit arrangement of a fire detector M, in which the time delay is controlled by the measured value.
  • a smoke-sensitive mession chamber MK is drawn as the sensor, the current of which generates the voltage U K at the external resistor R 2 .
  • This voltage is fed to the input of the transducer MW, the output voltage U A of which acts on the timing element T.
  • the bidirectional switch 19 is used to switch the line voltage to the next detector.
  • the diodes D 13 and D 14 are used for balancing, ie when installing the fire detector, it is not necessary to pay attention to the correct sequence of connections 2 and 3.
  • transistor T 19 When the line voltage is applied to terminals IA / IB and 2 or IA / IB and 3, transistor T 19 initially remains blocked. At the same time, the timer T starts and opens the transistor T 19 after a time delay which is given by the value of the voltage U A and thus switches the line voltage to the next detector.
  • a resistor in the fire detector is also switched on, which causes the current increase, which is evaluated in the control center to determine the detector address.
  • FIG. 3 shows a circuit arrangement of a preferred embodiment of a fire detector according to FIG. 2.
  • a fire detector with a mession chamber serves as an example as a smoke-sensitive sensor.
  • the mession chamber MK is connected in series with a comparison resistor R 2, in its place a reference ionization chamber can also be used, to which stabilized voltage U s is connected.
  • the capacitor C 20 is charged via the rectifier D 11 and bridges the systemic periodic interruptions in the line voltage.
  • the transistor T 16 together with the resistor R 1 and the Zener diode D 12 forms a voltage stabilization U s in a known manner.
  • the MOSFET T 18 serves as an impedance converter, ie it transmits the output voltage U K of the sensor to the input of the operational amplifier A, the operating point of which is determined by the resistors R 4, R 5 and R 6.
  • the output voltage U A of the operational amplifier is proportional to the sensor voltage UK .
  • the transistor T 17 In the normal operating state, the transistor T 17 is not conductive, the gate connection of the bidirectional switch T 19 is therefore at the potential of the connection 1, as a result of which the transistor T 19 is kept conductive.
  • the voltage across the capacitor C 21 is approximately limited by the diode 15 to the value of the amplifier output voltage U A. If the line voltage is now reduced to zero at the beginning of an interrogation cycle, the capacitor C 21 discharges to zero via the resistors R 7, R 9 and R 10. When the line voltage is switched on again, a charging current flows through the resistor R 7 to the capacitor C 21 and further via the resistor R 10. Thus the transistor T 17 becomes conductive and an additional current flows through the resistor R 8.
  • the gate potential of T 19 jumps below the threshold voltage of the field effect transistor and thus blocks T 19.
  • the diodes D 13 and D 14 ensure a symmetrical supply of the detector electronics, which, together with the symmetry properties of the transistor T 19, enables the optional supply from connection 2 or connection 3.
  • circuit arrangements with other symmetrical switching elements instead of the transistor T 19 are conceivable. JFETs or relays can also be used as bidirectional switches.
  • FIG. 4 an embodiment of the inventive method is shown in which the time delay from M is independently esswert.
  • the mode of operation is similar to that shown in FIG. 2.
  • the output voltage U A of the measuring transducer MW does not control the timing element T.
  • the measured value is converted into a coded pulse sequence or an AC signal, the frequency of which is determined by the measured value. This signal is received at the control center and evaluated accordingly.
  • the timer T runs and switches on the transistor T 19 after a fixed preselected time and thus switches the line voltage on to the next detector. It goes without saying that the duration of the measured value signal must be shorter than the switch-on delay.
  • This embodiment has the advantage that it is possible to separate between the measured value transmission and the detector addressing.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
  • General Induction Heating (AREA)
  • Dc-Dc Converters (AREA)
  • Sampling And Sample Adjustment (AREA)
EP81104115A 1980-06-23 1981-05-29 Dispositif pour la transmission des valeurs mesurées dans un système d'avertissement d'incendie Expired EP0042501B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104115T ATE13231T1 (de) 1980-06-23 1981-05-29 Einrichtung zur uebertragung von messwerten in einem brandmeldesystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4803/80 1980-06-23
CH4803/80A CH651688A5 (de) 1980-06-23 1980-06-23 Verfahren zur uebertragung von messwerten in einer brandmeldeanlage und einrichtung zur durchfuehrung des verfahrens.

Publications (2)

Publication Number Publication Date
EP0042501A1 true EP0042501A1 (fr) 1981-12-30
EP0042501B1 EP0042501B1 (fr) 1985-05-08

Family

ID=4282811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104115A Expired EP0042501B1 (fr) 1980-06-23 1981-05-29 Dispositif pour la transmission des valeurs mesurées dans un système d'avertissement d'incendie

Country Status (9)

Country Link
US (1) US4404548A (fr)
EP (1) EP0042501B1 (fr)
JP (1) JPS5730098A (fr)
AT (1) ATE13231T1 (fr)
CH (1) CH651688A5 (fr)
DE (1) DE3170379D1 (fr)
DK (1) DK263881A (fr)
FI (1) FI811935L (fr)
NO (1) NO152526C (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093872A1 (fr) * 1982-04-28 1983-11-16 Cerberus Ag Procédé pour la transmission de valeurs mesurées dans un système de contrôle
EP0101172A1 (fr) * 1982-07-16 1984-02-22 Apollo Fire Detectors Limited Moyens d'isolation de défauts de court-circuit pour installations de circuits électriques
EP0111178A1 (fr) * 1982-11-23 1984-06-20 Cerberus Ag Dispositif de contrôle avec plusieurs détecteurs connectés, en forme de chaîne, à une ligne de signalisation
US4528610A (en) * 1983-07-05 1985-07-09 Apollo Fire Detectors Limited Short circuit fault isolation means for electrical circuit arrangements
EP0243928A2 (fr) * 1986-04-30 1987-11-04 Siemens Nixdorf Informationssysteme Aktiengesellschaft Système de signalisation des risques
EP0418409A1 (fr) * 1989-09-19 1991-03-27 Siemens Aktiengesellschaft Procédé et dispositif pour éviter les influences climatiques de l'environnement sur les indicateurs automatiques d'incendie
US5801913A (en) * 1996-04-29 1998-09-01 Kiddie-Fenwal, Inc. Isolation circuitry

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507652A (en) * 1982-02-04 1985-03-26 Baker Industries, Inc. Bidirectional, interactive fire detection system
NO162317C (no) * 1983-05-19 1992-02-06 Hochiki Co Brannalarmanlegg
US4745398A (en) * 1987-02-09 1988-05-17 Sentrol, Inc. Self-powered sensor for use in closed-loop security system
USRE33807E (en) * 1987-02-09 1992-01-28 Sentrol, Inc. Self-powered sensor for use in closed-loop security system
US4916432A (en) * 1987-10-21 1990-04-10 Pittway Corporation Smoke and fire detection system communication
DE4036639A1 (de) * 1990-11-16 1992-05-21 Esser Sicherheitstechnik Verfahren zur ermittlung der konfiguration der melder einer gefahrenmeldeanlage und fuer die anlagenkonfigurationsbestimmung geeigneter melder
DE19940700C2 (de) * 1999-08-27 2003-05-08 Job Lizenz Gmbh & Co Kg Verfahren und Vorrichtung zur automatischen Zuweisung von Melderadressen bei einer Gefahrenmeldeanlage
JP2006099394A (ja) * 2004-09-29 2006-04-13 Horiba Ltd 火災検知システムおよび火災検知システムの制御方法
DE102005037047B3 (de) * 2005-08-05 2006-12-28 Novar Gmbh Gebäudeleittechnik- oder Gefahrenmeldeanlage
DE102010047220B4 (de) * 2010-10-04 2012-07-05 Novar Gmbh Verfahren zum Betreiben einer Sprachdurchsageanlage
CN106155861A (zh) * 2015-04-22 2016-11-23 鸿富锦精密工业(武汉)有限公司 电子设备报警电路
JP7064890B2 (ja) * 2018-01-22 2022-05-11 ホーチキ株式会社 火災報知設備

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176004A1 (fr) * 1972-03-15 1973-10-26 Ericsson Telefon Ab L M
DE2533382B1 (de) * 1975-07-25 1976-10-21 Siemens Ag Verfahren und Einrichtung zur UEbertragung von Messwerten in einem Brandmeldesystem
FR2322411A1 (fr) * 1975-08-28 1977-03-25 Sumitomo Chemical Co Appareil de controle et d'alarme dans une installation a ligne en boucle
DE2836760A1 (de) * 1978-08-23 1980-03-06 Ristow Kg Dr Alfred Elektrisches alarmanlagen-system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH468682A (de) * 1967-06-26 1969-02-15 Cerberus Ag Feuermeldeanlage
US3716834A (en) * 1971-10-07 1973-02-13 H Adams Data transmission system with immunity to circuit faults

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2176004A1 (fr) * 1972-03-15 1973-10-26 Ericsson Telefon Ab L M
DE2533382B1 (de) * 1975-07-25 1976-10-21 Siemens Ag Verfahren und Einrichtung zur UEbertragung von Messwerten in einem Brandmeldesystem
FR2322411A1 (fr) * 1975-08-28 1977-03-25 Sumitomo Chemical Co Appareil de controle et d'alarme dans une installation a ligne en boucle
DE2836760A1 (de) * 1978-08-23 1980-03-06 Ristow Kg Dr Alfred Elektrisches alarmanlagen-system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093872A1 (fr) * 1982-04-28 1983-11-16 Cerberus Ag Procédé pour la transmission de valeurs mesurées dans un système de contrôle
US4612534A (en) * 1982-04-28 1986-09-16 Cerberus Ag Method of transmitting measuring values in a monitoring system
EP0101172A1 (fr) * 1982-07-16 1984-02-22 Apollo Fire Detectors Limited Moyens d'isolation de défauts de court-circuit pour installations de circuits électriques
EP0111178A1 (fr) * 1982-11-23 1984-06-20 Cerberus Ag Dispositif de contrôle avec plusieurs détecteurs connectés, en forme de chaîne, à une ligne de signalisation
US4568919A (en) * 1982-11-23 1986-02-04 Cerberus Ag Monitoring system including a number of measuring stations series connected to a signal line
US4528610A (en) * 1983-07-05 1985-07-09 Apollo Fire Detectors Limited Short circuit fault isolation means for electrical circuit arrangements
USRE34643E (en) * 1983-07-05 1994-06-21 Apollo Fire Detectors Limited Short circuit fault isolation means for electrical circuit arrangements
EP0243928A2 (fr) * 1986-04-30 1987-11-04 Siemens Nixdorf Informationssysteme Aktiengesellschaft Système de signalisation des risques
EP0243928A3 (fr) * 1986-04-30 1989-02-08 Siemens Nixdorf Informationssysteme Aktiengesellschaft Système de signalisation des risques
EP0418409A1 (fr) * 1989-09-19 1991-03-27 Siemens Aktiengesellschaft Procédé et dispositif pour éviter les influences climatiques de l'environnement sur les indicateurs automatiques d'incendie
US5801913A (en) * 1996-04-29 1998-09-01 Kiddie-Fenwal, Inc. Isolation circuitry

Also Published As

Publication number Publication date
NO152526C (no) 1985-10-09
DK263881A (da) 1981-12-24
EP0042501B1 (fr) 1985-05-08
US4404548A (en) 1983-09-13
CH651688A5 (de) 1985-09-30
JPS5730098A (en) 1982-02-18
DE3170379D1 (en) 1985-06-13
NO152526B (no) 1985-07-01
NO812130L (no) 1981-12-28
JPS64753B2 (fr) 1989-01-09
ATE13231T1 (de) 1985-05-15
FI811935L (fi) 1981-12-24

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