EP0477607A2 - Arrangement pour la signalisation de risque - Google Patents

Arrangement pour la signalisation de risque Download PDF

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Publication number
EP0477607A2
EP0477607A2 EP91114864A EP91114864A EP0477607A2 EP 0477607 A2 EP0477607 A2 EP 0477607A2 EP 91114864 A EP91114864 A EP 91114864A EP 91114864 A EP91114864 A EP 91114864A EP 0477607 A2 EP0477607 A2 EP 0477607A2
Authority
EP
European Patent Office
Prior art keywords
line
detectors
detector
switches
double 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.)
Ceased
Application number
EP91114864A
Other languages
German (de)
English (en)
Other versions
EP0477607A3 (en
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0477607A2 publication Critical patent/EP0477607A2/fr
Publication of EP0477607A3 publication Critical patent/EP0477607A3/de
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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 detection system with chain synchronization, the detectors being arranged in the course of a double line serving as a supply and signal line and connected to a central unit by means of a line connection, and at least one switch being provided in each detector.
  • Hazard detection systems with chain synchronization work in such a way that the detectors arranged in the course of a double line are switched on one after the other into the line and then, immediately afterwards, send their message and / or receive a control command. In this way, it is possible to assign a unique address to each detector without having to set it with additional equipment or operating effort.
  • a switch is arranged in each detector, which has the task of interrupting or connecting a wire of the double line if necessary.
  • the message to be transmitted is formed by the time of the switching process; an additional voltage pulse is used as a control command, which is sent by the control center in this time slot.
  • the transmission security is increasingly endangered by interference voltages on the line, because on the one hand the shorter signals can be disturbed more easily and on the other hand the amplitude of these signals is reduced to comply with postal regulations while the disruptions remain the same.
  • an increase in the interference voltages must be expected because the electromagnetic pollution from, for example Cellular phones, microwave ovens, fluorescent lamps, etc. are generally increasing.
  • particularly large interference influences can damage entire hazard alarm systems or parts thereof in such a way that transmission is no longer possible even after the interference has subsided. Parts that are at risk are the switches used for the line interruption. They also increase the effective line resistance and thus both the attenuation of the carry signals and the losses in the energy supply to the detectors.
  • the invention is based on the object of reducing the influence of the interference voltages coupled into the double line, without reducing the transmission speed or jeopardizing compliance with postal regulations due to excessive useful signals.
  • the object is achieved in that a third line is provided, in the course of which the switches of the individual detectors are arranged.
  • the double line is routed through all detectors without the possibility of interruption, which increases the security of transmission due to the line symmetry and the security against destruction and reduces costs.
  • the line resistance of the switches present in the known system is eliminated, as a result of which both the attenuation of the transmission signals caused thereby and the losses in the energy supply to the detectors are reduced.
  • Detectors can thus be operated in large numbers and / or with higher energy requirements, without additional lines for energy supply and aids for suppressing them being required.
  • the chain synchronization via the third line according to the invention takes place with large, slow signals and is therefore safe against transmission interference even without additional balancing.
  • a resistor is arranged in the third line in a further embodiment of the invention as simple protection in front of and behind the switches.
  • the disadvantage of the additionally required third line according to the invention is reduced in a further embodiment of the invention in that this line only begins after the first detector and before the first detector is connected to one of the two wires of the double line. In this way, it is possible to run only the three-wire sections directly between the detectors, which have to be routed anyway, while the normally longer connection between the control panel and the first detector can be routed over two-wire communication lines that have already been laid.
  • a further embodiment of the invention provides for one or more detectors to be arranged between the control center and the first detector connected to the third line, the switches of which are located in one of the two wires of the double line.
  • FIG. 1 shows a hazard alarm system according to the invention, in which the detectors M1 to Mn are arranged in the course of a double line a, b connected to a central station Z.
  • Each of the detectors M1 to Mn contains a switch S1 to Sn.
  • These switches S1 to Sn are arranged in the course of a third line c, this third line c being connected in front of the first detector M1 to the b core of the double line a, b.
  • Only one double line a, b is shown here, but several double lines can also originate from the central office.
  • detectors M1 and M2 are shown as an example.
  • the detector M1 is connected on the input side with its terminals a11 and b11 to the control center Z and on the output side with its terminals a12 and b12 with the input terminals a21 and b21 of the detector M2.
  • Both detectors M1, M2 contain a measuring and control device MS, which are connected via terminals K and M to the two wires of the double line a, b.
  • capacitors G are provided which are connected to the signaling and control devices MS via the terminals Uv and M.
  • the terminals K and Uv are connected to each other via diodes D.
  • An input-side terminal c11 is connected on the one hand to the terminal b11 of the detector M1 and on the other hand via a resistor R to the terminal E of the signaling and control device MS.
  • An output side Terminal c12 is connected, on the one hand, also via a resistor R, to the terminal S of the signaling and control device MS and, on the other hand, via the third line c to the input-side terminal c21 of the detector M2.
  • Fig. 3 shows the curves of the voltages, which are applied from the control center Z to the double line a, b and are present at the inputs of the detectors M1 to Mn.
  • the center Z applies the open circuit voltage UR to the double line.
  • the capacitors C are charged via the diodes D in order to be able to supply the signaling and control devices MS with energy during the transmission phase.
  • control center Z switches the voltage on double line a, b to start voltage US, which is typically zero volts. This opens all switches S1 to Sn in detectors M1 to Mn.
  • the central station Z applies the interrogation voltage UA to the double line a, b, as a result of which the detector M1 begins to transmit its message. Since the double line a, b is not interrupted anywhere, both the interrogation voltage UA and the transmission signal are present both at the control center Z and at the inputs of all detectors M1 to Mn. After the detector M1 has ended its transmission, it closes its switch S1, as a result of which the interrogation voltage UA is now also present between the a wire of the double line and the third line c at the input of the detector M2, causing the latter to transmit its message to start.
  • the detector M2 After the detector M2 has given its message, it also closes its switch S2, as a result of which the interrogation voltage UA between the a wire of the double line and the third line c reaches the input of the detector M3. This process continues until the last detector Mn has given his message. Thereafter, the center Z again applies the quiescent voltage UR to the double line a, b, as a result of which the capacitors C can recharge. Then the cycle begins again.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
EP19910114864 1990-09-25 1991-09-03 Risk signal arrangement Ceased EP0477607A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4030298 1990-09-25
DE19904030298 DE4030298A1 (de) 1990-09-25 1990-09-25 Gefahrenmeldeanlage

Publications (2)

Publication Number Publication Date
EP0477607A2 true EP0477607A2 (fr) 1992-04-01
EP0477607A3 EP0477607A3 (en) 1992-12-09

Family

ID=6414931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910114864 Ceased EP0477607A3 (en) 1990-09-25 1991-09-03 Risk signal arrangement

Country Status (2)

Country Link
EP (1) EP0477607A3 (fr)
DE (1) DE4030298A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017186899A1 (fr) 2016-04-29 2017-11-02 Henkel Ag & Co. Kgaa Polymères à fonction amine et procédés de production de tels polymères

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4290055A (en) * 1979-12-05 1981-09-15 Technical Development Ltd Scanning control system
EP0224821A1 (fr) * 1985-11-26 1987-06-10 Siemens Aktiengesellschaft Système de signalisation de dangers
DE3806993A1 (de) * 1988-03-03 1989-09-14 Preussag Ag Feuerschutz Gefahrenmeldesystem
FR2637107B1 (fr) * 1988-09-26 1994-05-13 Alcatel Cit Systeme de collecte des alarmes d'un ensemble de stations
ATE116464T1 (de) * 1988-10-06 1995-01-15 Siemens Ag Verfahren zum energiesparenden betrieb von gefahrenmeldern in einer gefahrenmeldeanlage.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017186899A1 (fr) 2016-04-29 2017-11-02 Henkel Ag & Co. Kgaa Polymères à fonction amine et procédés de production de tels polymères

Also Published As

Publication number Publication date
EP0477607A3 (en) 1992-12-09
DE4030298C2 (fr) 1992-07-09
DE4030298A1 (de) 1992-03-26

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