EP0121102A2 - Dispositif pour la commutation d'avertisseurs individuels à l'opération de contrôle dans des installations de signalisation de danger - Google Patents

Dispositif pour la commutation d'avertisseurs individuels à l'opération de contrôle dans des installations de signalisation de danger Download PDF

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Publication number
EP0121102A2
EP0121102A2 EP84102148A EP84102148A EP0121102A2 EP 0121102 A2 EP0121102 A2 EP 0121102A2 EP 84102148 A EP84102148 A EP 84102148A EP 84102148 A EP84102148 A EP 84102148A EP 0121102 A2 EP0121102 A2 EP 0121102A2
Authority
EP
European Patent Office
Prior art keywords
detector
alarm
inspection
measured value
pulse
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
EP84102148A
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German (de)
English (en)
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EP0121102B1 (fr
EP0121102A3 (en
Inventor
Carl Dipl.-Ing. Koch
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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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT84102148T priority Critical patent/ATE31986T1/de
Publication of EP0121102A2 publication Critical patent/EP0121102A2/fr
Publication of EP0121102A3 publication Critical patent/EP0121102A3/de
Application granted granted Critical
Publication of EP0121102B1 publication Critical patent/EP0121102B1/fr
Expired legal-status Critical Current

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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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits

Definitions

  • the invention relates to an arrangement according to the preamble of claim 1.
  • the inspector then goes to the respective detectors that he triggers.
  • the detector is triggered by a detector tester by applying test gas to the detector. Acknowledgment is given by the indicator lamp in the detector. This is successively checked area by area. It is on inspection. However, the switched area is not ready for notification, so that no alarm notification can occur.
  • the test is generally carried out by switching the detection area to be checked at the control center to inspection.
  • One person triggers the individual detectors in sequence.
  • a receipt is given by to the second person at the control center, who notifies the first person that the detector has been triggered using a radio.
  • the area switched to inspection is also not ready to report.
  • this two-man inspection can be carried out on non-automatic detectors, such as push-button detectors.
  • a more or less large spatial area is therefore not monitored during the inspection, which represents a considerable security risk.
  • This risk is reduced if, in addition to the automatic detectors, manually triggered detectors are also installed, which, however, must not be connected to the same detection line as the automatic detectors. Then the detection line for automatic and the detection line for manual detectors may never be switched to inspection in the same spatial area, so that if necessary an alarm from the checked area with the activated detection line is still possible.
  • this has the disadvantage that a larger number of detectors are not always ready to alarm.
  • the maintenance technician has to walk twice in the same spatial area in order to walk through the different detection lines and to trigger the respective detectors. This means a considerable amount of time.
  • Another disadvantage is that in the meantime the switchover from one detection line to the other detection line must be carried out for the same area in the control center, which leads to a further expenditure of time in the one-man inspection if the reporting location and the control center are far apart.
  • DE-PS 25 33 382 describes a signaling system with several detectors connected to a control center via a detection line, in which, at the beginning of each query cycle, all detectors on the line voltage of the detector never electrically disconnected and then switched on in a predetermined order in such a way that after a time delay corresponding to its measured value, each detector additionally switches the respective subsequent detector on to the line voltage.
  • An evaluation device is located in the control center, which determines the respective detector address from the number of previous increases in the line current and the measured value from the length of the relevant switching delays. There, the analog detector measurement values are linked to obtain differentiated alarm messages or faults.
  • DE-AS 26 38 068 describes a fire alarm system with a plurality of detectors connected to a control center via a detection loop, in which the detectors can be connected to the line for querying by time elements which can be controlled by transducers.
  • the time element of each detector also briefly switches on a load resistor that increases the line current to the signaling loop.
  • the increase in the line current caused by the connection of the individual detectors is evaluated in the control center as the detector address, the times of the increase as the detector measured value.
  • the analog detector measured value or the additional current pulse of the respective detector is changed according to the invention in a defined manner, so that from the change in the detector measured value or from the pulse shape of the additional current pulse in the control center, the inspection status and the triggering of this that occurred relevant detector is recognized as an inspection alarm.
  • the detector has a switching device that can be operated mechanically or magnetically, for example, which is actuated from the outside and changes the detector measured value or the additional current pulse in a very specific manner.
  • an additional circuit arrangement is provided in the respective detector, which advantageously changes the measured value by a certain amount.
  • the idle measurement value for the inspection changeover can be brought into an inspection alarm zone by a defined measurement jump, which differs from the actual alarm zone.
  • the detector measured value jumps from the rest area into the alarm area after it has been triggered.
  • the detector is switched to inspection mode, for example by inserting a short-circuit plug, the detector measured value jumps from the rest area into a predetermined inspection area after being triggered.
  • the measurement signal of the triggered detector does not represent an alarm but an inspection alarm. This message can be displayed optically on the detector itself and / or in the control center.
  • the respective detector is reset after the inspection test.
  • the switching device of each current detector influence the amplitude or duration of the additional pulse in such a way that the inspection message can be derived in the control center from the pulse height or from the pulse width.
  • a further time element is advantageously provided in each detector, which is acted upon by a first time element, the. load resistor known per se, for example via a controlled transistor, connects to the signal line for a predeterminable time, the transit time of the second timing element determining the pulse width of the additional pulse.
  • the transit time of the second timing element can be determined by an RC element which corresponds to the Timer is assigned.
  • the changeover to inspection mode influences the RC element in a defined manner, for example by changing the resistance value of the resistance of the RC element, in such a way that a certain pulse duration of the additional pulse is generated.
  • This specific pulse duration is recognized in the control center as an inspection switchover and a subsequent triggering of the detector is interpreted as an inspection alarm.
  • the resistance value of the load resistance can be changed in a specifiable manner by the switching device for inspection operation, so that the pulse height of the additional pulse is influenced and the switchover to inspection operation of the detector in question is derived therefrom in the control center.
  • the detector measurement signal of the detector subsequently triggered is interpreted as an inspection alarm.
  • the analog detector measurement values are evaluated along with other criteria using the integration process.
  • the change in the measured value is evaluated according to the amount and the time by an alarm criterion to be able to derive.
  • the inspection is carried out on the one hand by switching to inspection mode by triggering the switching device for inspection on the detector, which causes a defined jump in measured values, which, according to the evaluation method of such detection systems, makes the detector less sensitive and identifies them as being under inspection.
  • the measured value jump is evaluated as preparation for inspection and the measured value signal of the subsequently triggered detector is evaluated as an inspection alarm.
  • the switch can be made on the detector by attaching the detector tester. Subsequent application of test gas to the detector is recognized as an inspection message by the central control unit.
  • the special properties of the test gas and the previously reduced detector sensitivity lead to a rapid decay of the relatively small change in measured values after the detectors have been switched back to normal operation. After a certain time, which corresponds to the decay of the test gas in the detector, the measured value of the detector returns to the ready-to-report state (idle value), just as the evaluation device in the control center switches back to normal measured value evaluation.
  • each alarm line of a control center can have both automatic and manual alarms, since line-by-line switching to inspection operation is unnecessary. This means that a reporting area needs to be inspected only once.
  • a plurality of detectors are connected to each detection line, detectors M11, M12 etc. on detection line ML1 and detectors M21 and M22 etc. on detection line ML2.
  • a reporting line is first switched to inspection at the central station Z for a reporting area. The inspector then goes from detector to detector in this zone and triggers the detector. For example, if automatic detectors are connected to the ML1 detection line, the detectors are triggered by a detector tester using test gas. A receipt is given by the indicator lamp in the detector.
  • the relevant ML1 zone is switched back to alarm readiness and the next ML2 zone of the same zone is switched to inspection.
  • the tester then goes from detector to detector of this ML2 detection line, on which manually operated detectors are installed, for example, and triggers them one after the other.
  • the inspector then goes back to the control center and switches the inspected zone back to alarm.
  • one person is at the control center and the second person triggers the detectors of a respective detection line switched to inspection in turn.
  • Acknowledgment can be made from the operator at the control center to the trigger at the detector using a radio.
  • the inspected reporting lines must then be switched back to ready to report.
  • FIG. 3 An inspection operation according to the invention is indicated in FIG. 3.
  • a man can switch only one detector to inspection at a time and check the functionality by triggering the detector. There is only one detector in this inspection procedure not ready to report for the short time of the inspection, while all other detectors of the same reporting line are ready to report.
  • the detector 4 shows a circuit arrangement of a detector for switching over to inspection mode.
  • the detector measured value is changed in a defined manner for inspection.
  • the push button alarm M is connected to an alarm line ML which consists of two conductors between which a voltage is applied.
  • the detector M essentially contains a timer TG1, which is started when the voltage is applied.
  • the running time of the timer TG1 is influenced by the transducer MW.
  • the line voltage is briefly switched off for synchronization.
  • the timer TG1 is only triggered when the voltage is applied. So that the transducer MW is supplied with current during the shutdown of the line voltage, a capacitor C is provided which supplies the transducer MW in the short time of the shutdown.
  • a diode D1 prevents feedback.
  • the transistor TR1 switches the detection line ML through to the subsequent detector. In this way, one detector after the other is switched on in a chain, the analog measured value influencing the timing element TG1 in accordance with its size.
  • the first timer TG1 is followed by a second timer TG2.
  • the output of the second timer TG2 drives a second transistor TR2 which is connected to the signal line ML via the resistor R.
  • the running time of the second timing element TG2 is determined by the RC element R T2 and C T2 .
  • the voltage transducer MW is assigned a voltage divider R1, R2 which influences the detector measured value in a defined manner.
  • Resistor R1 in parallel is connected in parallel with resistor R3 via detector switch MS. If the push button detector is actuated, ie the detector scarf ter MS open, the detector measured value changes abruptly and thus triggers an alarm.
  • the detector M has a further resistor R 'in parallel with the resistors R1, R3, which leads via a connection X1 - X2 for a short-circuit plug KS to the detector switch MS.
  • the detector switch MS is closed, ie the resistor R3 is connected in parallel with the resistor R1 of the voltage divider R1, R2.
  • the detector M is switched to inspection mode with the short-circuit plug KS in the connection points X1 - X2 and the resistor R '.
  • the signaling switch MS is triggered, a defined jump in the measured value is brought about, which causes a change in the measured value, but which differs from the change in the measured value when the alarm is given, as shown in FIG. 8 and is still carried out there.
  • FIG. 5 shows the block diagram of an automatic detector M, in which the detector measured value is also changed in a defined manner for the switchover (S) to inspection mode.
  • the detector M shows a similar structure to the detector M according to FIG. 4, with the difference that no push button switch MS and therefore no resistor R3 must be provided.
  • the measured value of the measured value converter MW is influenced in a defined manner in that the switch R for inspection operation switches the resistor R 'in parallel with the resistor R1 of the voltage divider R1, R2. The resulting jump in the measured value and the change in the measured value when the detector is triggered is shown in FIG. 10 and is explained there.
  • a detector M is in each case shown, the p etechnischs concede for switching to Ins also has a switch S with which the pulse amplitude (FIG. 6) or the pulse duration (FIG. 7) of the additional pulse is influenced.
  • the detector M is shown in the block diagram. It is connected to the ML reporting line.
  • the transducer MW is connected via the diode D to the signal line ML.
  • Connected in parallel with it is a capacitor C which supplies the transducer with current in the short time when the line voltage is switched off.
  • the running time of the first timer TG1 connected to the detection lines ML is influenced by the transducer MW.
  • the line voltage is briefly switched off for synchronization, as already described, and then switched on again.
  • the first timer TG1 thus begins to run as a function of the detector measured value via the measured value converter MW. After the timer TG1 has elapsed, the transistor TR1 switches the detection line ML through to the subsequent detector. In this way, as already explained above, one detector after the other is switched on in a chain.
  • the first timer TG1 is followed by a second timer TG2, the output of which drives a second transistor TR2, which is connected to the detection line ML via the load resistor R.
  • An additional current pulse (A) flows through the load resistor R, which briefly amplifies the line current (IL).
  • a further resistor R ' is connected in parallel to the load resistor R via the switch S for switching over to inspection mode.
  • the pulse amplitude (A2) for the inspection operation is influenced in a defined manner, as shown in FIG. 12.
  • FIG. 7 shows the block diagram of a detector M, in which the pulse duration (t) of the additional pulse (A) is influenced for the switchover S to inspection mode.
  • the circuit arrangement of the detector M is similar to the circuit arrangement of FIG. 6. Resisting the load However, in this case, R was not assigned a further resistor in parallel, rather the additional resistor (R ') was assigned to the RC element R T2 and C T2 .
  • the RC element determines the running time of the second timing element TG2.
  • the further resistor R ' T2 is connected in series with the resistor R T2 of the RC element, but is short-circuited with the switch S. If the detector M is switched to inspection, the switch S is opened and the pulse duration (t) of the additional pulse (A2) is influenced in the desired manner. This is shown in Fig. 13.
  • FIG. 8 shows a measured value diagram for a push button detector according to FIG. 4 with a defined change in measured value for the inspection operation.
  • the detector measurement value MMW is plotted over time t. This corresponds to an idle value MMW1 when the detectors are at rest.
  • the short-circuit plug KS described in FIG. 4 is plugged in at the time TR1 in order to switch over to inspection operation in the push-button detector.
  • the push button detector is triggered by actuating the push button (switch MS), so that the detector measured value MMW drops suddenly.
  • the circuit arrangement in the detector is designed so that the detector measured value MMW2 as the inspection alarm value is higher than the actual alarm value (MMW3) when the detector is triggered.
  • the evaluation device provided there can recognize that an inspection alarm value MMW2 is present.
  • the change in the measured value of the detector MMW1 - MMW2 is interpreted as a criterion for the inspection alarm.
  • the detector is reset, so that the detector resumes its idle value MMW1.
  • the short-circuit plug is then pulled, for example at time T4, so that the detector is ready for normal operation again.
  • Fig. 9 the change in measured value for the alarm case is shown for a push button detector.
  • the detector measurement value MMW1 corresponds to the idle value. If the push-button detector is actuated with the switch MS (FIG. 4) at time T1, a defined measurement value jump takes place.
  • This change in measured value MMW1 - MMW3 which differs from the change in measured value in inspection operation, is evaluated in the control center as a criterion for alarm.
  • the push button detector must be reset after it has been triggered so that, for example, the detector returns to normal operation at time T2 and assumes its idle value MMW1.
  • the detector 10 shows a detector measured value diagram for the defined measured value change in an automatic detector.
  • the detector measurement value MMW is also plotted against the time t.
  • the detector has a detector measured value (idle value) MMW1, which is changed abruptly at time T1 by actuating the switch (S) for inspection operation.
  • MMW1 - MMW21 is recognized in the control center as a switchover to inspection mode.
  • the detector which is exposed to a test gas at time T2 and is thus triggered, emits an alarm by changing its measured value (MMW3), which is evaluated in the control center as a criterion for an inspection alarm.
  • the detector measurement value MMW drops, so that it falls into the alarm threshold (MMW3).
  • the switch (S) is reset again at time T3, for example when the detector tester is switched off, the instantaneous detector measured value MMW jumps back again by the increased amount (IMMW1-MMW21). After the test gas in the detector has decayed, for example at time T4, the detector returns to its idle value MMW1. After this time, the detector detects any changes in measured values in the control center as real alarms.
  • the detector has an idle value MMW1, which, for example at time.T2, changes slowly due to a hazard criterion and moves in the direction of the alarm threshold (MMW3). This is recognized in the control center as an alarm criterion, for example at time T3. If there is no longer an alarm criterion, the detector returns to its idle value MMW 1 (time T4).
  • FIG. 12 shows the current curve IL of a detection line (ML) over time t, in accordance with the influencing of the pulse amplitude (A) of the additional pulse according to FIG. 6.
  • the time T1 corresponds to the measured value of the first detector (M1) corresponding to the running time of the Timing element (TG1).
  • the additional pulse generated after the timer (TG1) has the amplitude A1 and the duration t.
  • the following detector (M2) has a time period T2 according to its measured value until the next detector is switched on to the detection line. If, for example, the second detector (M2) is switched to inspection, the amplitude (A) is changed according to the invention according to FIG. 6, here raised to the amplitude level A2.
  • the time T3 of the first timer (TG1) of the third detector (M3) passes in accordance with the measured measured value of the third detector (M3) until the additional pulse A3 of the third detector (M3) is then generated without being influenced becomes.
  • the second detector (M2) is switched to inspection.
  • the detector measured value ( T2) of the triggered detector (M2) switched to inspection is not interpreted as an alarm criterion, but recognized as an inspection alarm.
  • Fig. 13 is the pulse diagram IL of a notification line (ML), the duration of the additional pulse A in the second detector (M2) corresponding to the time value T2 being changed, so that it can be seen in the control center that this detector (M2) is switched to inspection mode.
  • the detector is first switched to inspection mode with the switch provided for this purpose on the detector, and then the detector is triggered.
  • the resulting change in the measured value is recognized in the control center as an inspection message and an inspection alarm is displayed on the detector.
  • the detector is then switched back to normal operation, so that later changes in the detector's measured values are recognized again as real alarm messages in the control center.
EP84102148A 1983-03-03 1984-02-29 Dispositif pour la commutation d'avertisseurs individuels à l'opération de contrôle dans des installations de signalisation de danger Expired EP0121102B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84102148T ATE31986T1 (de) 1983-03-03 1984-02-29 Anordnung zur umschaltung einzelner melder auf inspektionsbetrieb in einer gefahrenmeldeanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3307616 1983-03-03
DE19833307616 DE3307616A1 (de) 1983-03-03 1983-03-03 Anordnung zur umschaltung einzelner melder auf inspektionsbetrieb in einer gefahrenmeldeanlage

Publications (3)

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EP0121102A2 true EP0121102A2 (fr) 1984-10-10
EP0121102A3 EP0121102A3 (en) 1984-11-14
EP0121102B1 EP0121102B1 (fr) 1988-01-13

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EP84102148A Expired EP0121102B1 (fr) 1983-03-03 1984-02-29 Dispositif pour la commutation d'avertisseurs individuels à l'opération de contrôle dans des installations de signalisation de danger

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EP (1) EP0121102B1 (fr)
AT (1) ATE31986T1 (fr)
DE (2) DE3307616A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213383A1 (fr) * 1985-07-29 1987-03-11 Siemens Aktiengesellschaft Méthode et dispositif de surveillance du fonctionnement de détecteurs optiques de fumée

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100487A1 (de) 2013-01-17 2014-07-17 Helmut Thate Vorrichtung zur Herstellung von Speiseeis

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2638068B2 (de) 1976-08-24 1980-08-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Brandmeldeanlage mit mehreren über eine Meldeschleife betreibbaren Meldern
EP0066200A1 (fr) 1981-05-26 1982-12-08 Siemens Aktiengesellschaft Procédé et dispositif pour la révision dans un système détecteur de danger et particulièrement d'incendie

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH501284A (de) * 1969-11-14 1970-12-31 Cerberus Ag Vorrichtung zur Prüfung der Funktionsbereitschaft von Rauchmeldern
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
US4194191A (en) * 1975-11-10 1980-03-18 General Electric Company Smoke simulating test apparatus for smoke detectors

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2638068B2 (de) 1976-08-24 1980-08-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Brandmeldeanlage mit mehreren über eine Meldeschleife betreibbaren Meldern
EP0066200A1 (fr) 1981-05-26 1982-12-08 Siemens Aktiengesellschaft Procédé et dispositif pour la révision dans un système détecteur de danger et particulièrement d'incendie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213383A1 (fr) * 1985-07-29 1987-03-11 Siemens Aktiengesellschaft Méthode et dispositif de surveillance du fonctionnement de détecteurs optiques de fumée

Also Published As

Publication number Publication date
EP0121102B1 (fr) 1988-01-13
DE3307616A1 (de) 1984-09-06
ATE31986T1 (de) 1988-01-15
DE3468761D1 (en) 1988-02-18
EP0121102A3 (en) 1984-11-14

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