EP0158217A1 - Arrangement de couplage pour une installation signalant des dangers - Google Patents

Arrangement de couplage pour une installation signalant des dangers Download PDF

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Publication number
EP0158217A1
EP0158217A1 EP85103600A EP85103600A EP0158217A1 EP 0158217 A1 EP0158217 A1 EP 0158217A1 EP 85103600 A EP85103600 A EP 85103600A EP 85103600 A EP85103600 A EP 85103600A EP 0158217 A1 EP0158217 A1 EP 0158217A1
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EP
European Patent Office
Prior art keywords
circuit arrangement
detector
evaluation electronics
arrangement according
counter
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
EP85103600A
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German (de)
English (en)
Other versions
EP0158217B1 (fr
Inventor
Reiner Künzel
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.)
Fritz Fuss GmbH and Co
Original Assignee
Fritz Fuss GmbH and Co
FRITZ FUSS KOM GES ELEKTROTECHNISCHE FABRIK
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.)
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Publication date
Application filed by Fritz Fuss GmbH and Co, FRITZ FUSS KOM GES ELEKTROTECHNISCHE FABRIK filed Critical Fritz Fuss GmbH and Co
Priority to AT85103600T priority Critical patent/ATE36767T1/de
Publication of EP0158217A1 publication Critical patent/EP0158217A1/fr
Application granted granted Critical
Publication of EP0158217B1 publication Critical patent/EP0158217B1/fr
Expired legal-status Critical Current

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    • 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
    • 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
    • G08B26/001—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel
    • G08B26/002—Alarm systems in which substations are interrogated in succession by a central station with individual interrogation of substations connected in parallel only replying the state of the sensor

Definitions

  • the invention relates to a circuit arrangement for a G eHRMeldestrom with several detectors, which are connected via a two-wire detection line to a control center having an evaluation electronics, which assigns certain signals supplied by the detectors each defined states on the detectors.
  • a plurality of detectors are connected in a detection line to a control center, in which evaluation electronics are accommodated, which are able to evaluate the signals supplied by the individual detectors, in particular voltage levels. Sensors that respond to the hazard to be detected can be used as detectors.
  • each detector is connected in series to the control center in a two-wire detection line, whereby each detector is connected between the two wires of the detection line, which in turn is terminated by a line resistance.
  • a circuit arrangement constructed in this way can display two states at the control center, namely alarm and / or fault.
  • the status "alarm" is displayed at the control center, then an observer does not know which detector, for example the thirty detectors in the detection line, is causing this state.
  • An individual identification of the detector causing the alarm state can possibly only be carried out on site, for example by checking which detector a light emitting diode emits light if each detector is assigned such a light emitting diode which is excited in the alarm state.
  • peripheral devices connected to a central unit from industrial control technology and data processing is known per se. In principle, it is also possible to apply this individual identification to a hazard detection system with numerous detectors located in one detection line.
  • a signal level applied to the detector by the evaluation electronics is cyclically reversed is keyed that in the detectors a counter corresponding to this voltage level shift keying counts logical states, that if the counter value is identical with an address value preset for each detector, the detector outputs a signal characterizing its state via the detector line to the evaluation electronics, and that the counters can all be reset by another signal level shift keying or by a reset signal with the same signal level as when counting and with a different pulse width.
  • the circuit arrangement according to the invention is compatible with existing hazard alarm systems, i.e. the detectors provided for in the invention can be retrofitted into already installed hazard alarm systems without any great effort.
  • a two-wire detector line is sufficient, since this detector line not only supplies the individual detectors with the operating voltage, but also handles all data traffic.
  • the outlay for the circuit arrangement according to the invention is very low, which is also expressed in that the space requirement for the circuit arrangement is minimal.
  • Logic signals with the value O or 1 are obtained from these voltage drops, for example by means of comparators in the individual detectors, which signals are then fed to a binary counter as counting pulses.
  • This binary counter counts the logical signals in the individual detectors, for example from 1 to 32. This means that as often as the voltage on the detector line is reduced to the specified voltage value, the counter switches by the value 1.
  • the voltage at the detector line could also be increased, in which case the counter would advance by the value 1 with each increase.
  • the reset signal can also have the same voltage value as the counter pulses and differ from them by the different pulse width.
  • the detector address Only if the counter content of the counter of each detector matches a value set in the detector by means of a coding switch, the so-called detector address, can the detector transmit information back to the control center. This means that if the detector address matches the meter reading, certain signals can be sent to the control center, for example a precisely defined current increase. the status of the relevant detector can be given via the detection line, which is evaluated accordingly by the control center.
  • each addressed detector reports back with a precisely defined current increase if the counter reading is the same as the detector address. If this feedback is not given, a sabotage and / or fault message is sent to the control center.
  • FIG. 1 shows an existing alarm system with a control center 1, to which a two-wire alarm line 2, 3 with individual detectors 4, 5, 6 and an alarm line terminating resistor 7 are connected.
  • a control center 1 For example, 20 or even 32 different detectors 4, 5, 6,... Can be connected to the control center 1 in this way.
  • Each detector 4,5,6 lies between the two wires of the detection line 2,3.
  • a display 8 is provided on the control center 1, in which, for example, an alarm can be reported by means of a light-emitting diode 9 and a fault can be reported by means of a light-emitting diode 10.
  • the light emitting diode 10 lights up, an observer does not know which of the detectors 4, 5, 6 is malfunctioning. A check must therefore be carried out on site, which can be done by assigning a light emitting diode 14, 15, 16 to each detector 4, 5, 6, which emits light if the associated detector 4, 5 or 6 has a fault or an alarm is given. If the light-emitting diode 10 lights up, then it must be checked which of the light-emitting diodes 14, 15, 16 also emits light, which in the case of a large alarm system, for example with 32 different detectors can be extremely complex.
  • FIG. 2 The same reference numerals are used in FIG. 2 for corresponding components as in FIG. 1
  • FIG. 2 shows a block diagram of the circuit arrangement according to the invention. This consists of the control center 1, the detector line 2, 3, the two detectors 4, 5 and the detector line end resistor 7.
  • the detector line end resistor 7 can be omitted in the present exemplary embodiment, since it works with cyclical feedback. Of course, 32 different detectors can also be connected between the detection line 2, 3 in this exemplary embodiment. For better clarity, only the detector 4 is shown in detail, while the detector 5 is only indicated schematically.
  • the control center 1 essentially consists of evaluation electronics 20 having a memory, to which voltage comparators K1, K2 and K3 or a commercially available analog / digital converter are connected, each of which is preceded by an operational amplifier IC1 for "lossless current measurement” (cf. EP- OS 0098326).
  • the operating voltage U B is fed via a line 21 and a resistor 22 to the positive input of the operational amplifier IC1 and is also connected to the negative inputs of the voltage comparators K1, K2 and K3 via resistors 23, 24, 25.
  • the positive inputs of the voltage comparators K1, K2 and K3 are connected to the output of the operational amplifier IC1, the negative input of which is fed back to the output thereof via a resistor R1.
  • the positive input of the operational amplifier IC1 is connected via resistors 26, 27, 28 to the ground wire 3 of the detection line 2, 3, the center bar between the resistors 26 and 27 or between the resistors 27 and 28 being connected to the collector Transistors T1 and T 2 is connected.
  • the emitters of these transistors T1 and T 2 are connected to the wire 3, while the base connections are each connected to the evaluation electronics 20 via resistors 29, 30.
  • a seven-segment display 32 for the detector number On the output side of the evaluation electronics 20 are a seven-segment display 32 for the detector number, a light-emitting diode 33 for the alarm display, a light-emitting diode 34 for the fault display and keys TA1 and TA2 for actuating the detector display 32 or Forwarding of the detector number provided.
  • a voltage UM + ⁇ UM is applied by the control center 1 between the wires 2, 3 of the detection line.
  • the individual detectors 4, 5 report the respective state by increasing the current ⁇ IM, i.e. the current IM flowing in the wire 2 is increased by ⁇ IM when a certain state is detected, for example in the event of a fault.
  • the specific current increases aIM are converted in the control center 1 by the operational amplifier IC1 into a corresponding voltage UA1.
  • the comparator from the three voltage comparators K1, K2 and K3 then evaluates the voltage value UA1 output by the operational amplifier IC1, whereby there is a detector feedback if this voltage value corresponds to a reference voltage U Ref1 , while a detector alarm is given if the voltage UA1 is equal to a reference voltage U Ref2 . Finally, there is a detector fault if the voltage value UA1 is equal to the reference voltage value U Ref3 .
  • the voltage values from the operational amplifier IC1 could also be evaluated by means of a commercially available analog / digital converter, which converts an analog voltage value fed into it into an equivalent digital value, which is then processed in the evaluation electronics 20 in accordance with the criteria "alarm", "fault". and "feedback" is evaluated.
  • the current increase ⁇ IM corresponding to a specific detector state is thus converted by the operational amplifier IC1 into a voltage increase UA1, which in turn is compared with certain reference voltages, so that - depending on the determined voltage increase - an observer from via the displays 32, 33 and 34 can be reported to the evaluation electronics 20, which detector 4 5 which detector state is present.
  • the detector 4 (and likewise the other detectors 5, etc.) consists of detection and evaluation electronics 40 for detecting physical variables, such as smoke, heat, movement, etc. This evaluation electronics 40 supplies appropriate signals for the status of the detector 4, signals for alarm, malfunction, etc.
  • An input demodulator 41 consists of voltage comparators K4 and K5, which generate signals “counting” and “resetting” by comparing the signaling line voltage UM offered in each case with reference values U Ref4 and U Ref5 and a downstream logic 42. These signals can differ in terms of different signal levels and / or pulse widths.
  • a 5-bit BCD counter 43 ähl plausible with outputs Q1 to Q5 und.einer Z "OOOOO" to "11111” is in each case incremented by the signal "Count” by the logic 42 by the value +1 and with the signal “Reset “reset by logic 42 to the value” OOOOO ".
  • the 5-bit BCD counter 43 is connected to a 5-bit comparator 44 via its outputs Q1 to Q5 and supplies it with input signals A. Furthermore, a 5-pin coding switch 45 is located on the 5-bit comparator 44, with which the detector number 1 to 32 can be set for a total of 32 detectors. In this way, the coding switch 45 supplies the 5-bit comparator 44 with an input signal B. If the two input signals A and B are identical, the 5-bit comparator generates a logic 1 as an output signal a transistor output stage 46 is released from resistors 47, 48, 49, 50 and transistors T3 and T4. Ie, if signals A and B are identical, a current increase ⁇ IM is passed on to signaling line 2, 3 through this transistor output stage, this current increase ⁇ IM being dependent on the state of detector 4, which is detected by evaluation electronics 40.
  • the transistor T4 is activated, while when the transistor T3 is activated there is an alarm and an activation of the two transistors T3 and T4 means a fault.
  • the detector 4 also has a voltage regulator 51 between the wire 2 and the evaluation electronics 40, a diode 52 and a capacitor 53 between the two wires 2, 3, resistors 54, 55 and 56 for setting the reference voltage en URef4 and U Ref5 between the output of the controller 51 or the input of the evaluation electronics 40 and the wire 3 and a resistor 57 between the wire 2 and the negative input of the voltage comparators K4 and K5. Finally, there is a logic 58 between the output of the evaluation electronics 40 and the resistors 47, 48 for generating the "fault" and "alarm" signals.
  • the evaluation electronics 20 cyclically control the transistors T1 or T2 via the resistors 29, 30, as a result of which the reference voltage value at the non-inverting input of the operational amplifier IC1 is also changed cyclically.
  • the signal line voltage UM then changes by the same voltage amount.
  • each interrogation cycle of the transistor T 1 is supplied with the time t 1 is driven and conductive, whereby the M elde- line voltage UM drops to a value UM3.
  • the transistor T1 is then blocked and the signal line voltage rises again to its initial value UM1.
  • This voltage value UM1 is maintained for a period of time t 2 .
  • the transistor T2 is conducting, which means that the M eldelinien- voltage UM during the time period t 3 to a value UM2 decreases.
  • the pulses corresponding to the voltage values UM2 are counted by the binary counters 43 of the individual detectors 4, 5 until, for example, the value 32 is reached.
  • the voltage value UM1 finally corresponds to normal operation, i.e. a polling cycle in which the status of the individual detectors 4, 5 is polled by the control center.
  • the voltage values UM1, UM2 and UM3 which are present at the detection line 2, 3 are registered, recorded and evaluated by all connected detectors 4, 5.
  • the voltage comparators K4 and K5 derive from the voltage values whether the counter 43 should continue to count or whether this counter 43 should be reset.
  • a working cycle begins with a reset signal, ie with the signal in which the voltage value UM3 is present during the time period t 1 . Such a signal is shown e in Fig. 3 (B) g.
  • This reset signal causes in all M-fields 4.5, the counter 43, for example, reset to the counter reading "00000".
  • a voltage jump to the voltage value UM2 during the time period t 2 generates a counting pulse, which means that in a hazard detection system with, for example, 30 detectors, the respective counters 43 are counted up cyclically from 1 to 30 ("OOOOO" to "11110"). These signals are in Fi g . 3 (C).
  • the 5-bit comparator 44 now statically compares the BCD value B set with the coding switch 45 with the counter content of the counter 43. If the counter reading of the counter 43 and the detector number set by the coding switch 45, ie the address, the output of the comparator 44 is activated, whereby the transistors T3 and T4 are switched on.
  • a corresponding current increase is carried out at the detection line 2, 3 when the transistors T3 and T4 are switched on. If there is an alarm, transistor T3 is activated and the current increase ⁇ IM is UM / R. In the event of a fault, the transistors T3 and T4 are activated and the current increase AIM is UM / 3R, since the resistor 49 is said to have twice the resistance value as the resistor 50.
  • the defined current increase related to each detector is evaluated in the control center 1 or in the evaluation electronics 20.
  • the output voltage UA1 of the operational amplifier IC1 changes in accordance with the current change ⁇ IM in the detection line 2, 3.
  • the output voltage UA1 of the operational amplifier IC1 is therefore proportional to the current change ⁇ IM.
  • the comparators K1, K2 and K3 are then activated so that the information corresponding to the respectively addressed detector 4, 5 (alarm, fault, feedback) is present at the evaluation electronics 20. This information is evaluated and displayed 32, 33 and 34.
  • the display 32 can be used to show which detector has triggered an alarm and / or a fault.
  • the fault is indicated by the LED 34, while the LED 33 lights up when there is an alarm on one of the detectors.
  • the TA2 key it is possible to successively advance the detector number by the amount +1, i.e. the display 32 is increased by the value +1. Pressing the TA1 key again can finally exit the display mode.
  • FIG. 3 (H), 3 (I) and 3 (J) each show a signal which reports a "feedback", an "alarm” or a "fault” of the evaluation electronics 20.
  • Fig. 3 (K) are ultimately the result of the evaluation by the evaluation unit 20 on: it is there namely, a feedback of the second detector the signal line 2.3, an alarm of the fourth M elders the detection line 2.3 and disturbance of the sixth M elders of the reporting line 2.3 shown.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Road Signs Or Road Markings (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
EP85103600A 1984-03-26 1985-03-26 Arrangement de couplage pour une installation signalant des dangers Expired EP0158217B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85103600T ATE36767T1 (de) 1984-03-26 1985-03-26 Schaltungsanordnung fuer eine gefahrenmeldeanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3411129 1984-03-26
DE19843411129 DE3411129A1 (de) 1984-03-26 1984-03-26 Schaltungsanordnung fuer eine gefahrenmeldeanlage

Publications (2)

Publication Number Publication Date
EP0158217A1 true EP0158217A1 (fr) 1985-10-16
EP0158217B1 EP0158217B1 (fr) 1988-08-24

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EP85103600A Expired EP0158217B1 (fr) 1984-03-26 1985-03-26 Arrangement de couplage pour une installation signalant des dangers

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EP (1) EP0158217B1 (fr)
AT (1) ATE36767T1 (fr)
DE (2) DE3411129A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248298A1 (fr) * 1986-06-03 1987-12-09 Cerberus Ag Dispositif détecteur de danger
EP0717386A1 (fr) * 1994-12-14 1996-06-19 Schneider Electric Sa Dispositif de détection et d'alarme
FR2756650A1 (fr) * 1996-11-15 1998-06-05 Menvier Electronic Eng Ltd Affectation d'adresses a des dispositifs adressables
DE102015223207A1 (de) * 2015-11-24 2017-05-24 Minimax Gmbh & Co. Kg Zustandsüberwachungseinheit zur Identifizierung eines Ereignis detektierenden Teilnehmers sowie Teilnehmer und Verfahren dazu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250488A1 (fr) * 1985-12-24 1988-01-07 Monitronix Limited Systeme sequentiel electronique de decelement de pannes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1441417A1 (de) * 1963-03-04 1968-11-21 Int Standard Electric Corp UEberwachungssystem
DE3128796A1 (de) * 1981-07-21 1983-02-10 Esser Sicherheitstechnik GmbH & Co KG, 4040 Neuss Brand- oder einbruchmeldeanlage
EP0098326A1 (fr) * 1982-07-10 1984-01-18 Fritz Fuss Kom.-Ges. Circuit pour la signalisation de risques
GB2141276A (en) * 1983-06-08 1984-12-12 Honeywell Inc Data reporting system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1178678A (fr) * 1981-03-13 1984-11-27 John M. Wynne Systeme bidirectionnel de detection d'incendie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1441417A1 (de) * 1963-03-04 1968-11-21 Int Standard Electric Corp UEberwachungssystem
DE3128796A1 (de) * 1981-07-21 1983-02-10 Esser Sicherheitstechnik GmbH & Co KG, 4040 Neuss Brand- oder einbruchmeldeanlage
EP0098326A1 (fr) * 1982-07-10 1984-01-18 Fritz Fuss Kom.-Ges. Circuit pour la signalisation de risques
GB2141276A (en) * 1983-06-08 1984-12-12 Honeywell Inc Data reporting system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248298A1 (fr) * 1986-06-03 1987-12-09 Cerberus Ag Dispositif détecteur de danger
US4757303A (en) * 1986-06-03 1988-07-12 Cerberus Ag Alarm system
EP0717386A1 (fr) * 1994-12-14 1996-06-19 Schneider Electric Sa Dispositif de détection et d'alarme
FR2728373A1 (fr) * 1994-12-14 1996-06-21 Schneider Electric Sa Dispositif de detection et d'alarme
FR2756650A1 (fr) * 1996-11-15 1998-06-05 Menvier Electronic Eng Ltd Affectation d'adresses a des dispositifs adressables
DE102015223207A1 (de) * 2015-11-24 2017-05-24 Minimax Gmbh & Co. Kg Zustandsüberwachungseinheit zur Identifizierung eines Ereignis detektierenden Teilnehmers sowie Teilnehmer und Verfahren dazu

Also Published As

Publication number Publication date
EP0158217B1 (fr) 1988-08-24
ATE36767T1 (de) 1988-09-15
DE3564629D1 (en) 1988-09-29
DE3411129A1 (de) 1985-10-03

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