EP0098554B1 - Verfahren und Einrichtung zur automatischen Abfrage des Meldermesswerts und der Melderkennung in einer Gefahrenmeldeanlage - Google Patents

Verfahren und Einrichtung zur automatischen Abfrage des Meldermesswerts und der Melderkennung in einer Gefahrenmeldeanlage Download PDF

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Publication number
EP0098554B1
EP0098554B1 EP83106448A EP83106448A EP0098554B1 EP 0098554 B1 EP0098554 B1 EP 0098554B1 EP 83106448 A EP83106448 A EP 83106448A EP 83106448 A EP83106448 A EP 83106448A EP 0098554 B1 EP0098554 B1 EP 0098554B1
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EP
European Patent Office
Prior art keywords
signal
detector
current pulse
additional current
identification
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.)
Expired
Application number
EP83106448A
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German (de)
English (en)
French (fr)
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EP0098554A1 (de
Inventor
Otto-Walter Dipl.-Ing. Moser
Carl Ing. Grad. Koch
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
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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 AT83106448T priority Critical patent/ATE17532T1/de
Publication of EP0098554A1 publication Critical patent/EP0098554A1/de
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Publication of EP0098554B1 publication Critical patent/EP0098554B1/de
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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 method for automatically querying the detector measured value and the detector detection in a hazard alarm system according to the preamble of claim 1 and a device for carrying out this method.
  • Such a signaling system is described for example in D E-PS 25 33 330.
  • the detector is prompted to emit a current pulse with a pulse duration proportional to its measured value.
  • the address of the individual detector and the analog detector measured value are determined by measuring the lead time of each detector and by measuring the pulse width.
  • This procedure allows the cyclical polling of the individual detectors to recognize both the current detector measurement value and the detector address.
  • the detector address (identification) is determined from the lead time until the detector sends a pulse.
  • the analog measured value is derived from the pulse duration (pulse width).
  • Another parameter, e.g. Detector type (smoke or heat detector) of the respective detector is not intended for the transmission of measured values in this method.
  • DE-PS 25 33 382 a method is described for such alarm systems, which electrically separates all detectors from the detection line at the beginning of each query cycle and then switches on the detectors in a predetermined order in such a way that each detector after a time delay corresponding to its measured value additionally connects the following detector 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 for obtaining differentiated malfunction or Alarm messages linked.
  • detectors that are triggered for test purposes, such as revision, must not cause an alarm. They should only show the response at the headquarters. In such cases, it is necessary to identify different types of detectors or operating states and to inform the control center.
  • a detector identification namely the type or status of the detector
  • Detector-specific identifiers can be saved in the control center for each detector in the system.
  • This entry of a detector identification which is generally carried out manually, is correspondingly stored via switches or a keyboard.
  • the data entered must exactly match the current status of the system. Errors caused during input or when replacing a detector can not be reliably detected by the system and can have serious consequences in the event of an alarm. If a change is made to such systems, e.g. if one detector type is exchanged for another, because the room is used for another purpose, this must also be entered in the control center.
  • a fire alarm system with several detectors connected via a signaling loop to a control center
  • the detectors can be connected to the line for polling by time elements controllable by the measuring transducers, the control center being connected by the connection increase of the line current caused by the individual detectors and the times of the increases are evaluated as detector address and detector measurement value.
  • the load element of the respective detector also briefly switches on a line resistor, which increases the line current, via a capacitor to the signaling loop. This causes a switch-on peak in the form of an additional current pulse with which the switch-on of the following detector is clearly identified.
  • the transmission of a further parameter apart from the detector address and the respective analog detector measured value is not provided.
  • the additional current pulse which briefly increases the line current of the signaling line, is influenced in a predeterminable manner in such a way that a characteristic quantity characteristic of the detector can be derived from the defined changed additional current pulse.
  • the pulse amplitude can expediently be influenced in such a way that the amplitude is used as an identifier for e.g. the type of detector serves.
  • Each detector in a detector line therefore emits an additional pulse when queried, the amplitude and duration of which vary from detector to detector.
  • two additional detector parameters can be transmitted to the control center with a query cycle and evaluated there.
  • the first timer is followed by a second timer, which switches on the load resistor causing the additional current pulse for a predefinable time.
  • the resistance value influences the level of the pulse amplitude, so that the detector detection of each individual detector can expediently be set with the load resistor.
  • the pulse duration of the additional pulse can advantageously be set with the second timing element, so that a second detector identification can be set for each individual detector.
  • the second timing element can be formed by a monoflop that is acted upon by an RC element.
  • FIGS. 3 and 4 show a pulse diagram.
  • the detector M is connected to the control center via the signaling line ML, which is not specifically shown.
  • the message line ML consists of conductors 1 and 2, between which a voltage can be applied by the control center.
  • the detector M essentially contains a timer T1, which is started when the voltage U is applied.
  • the running time of the timer T1 is influenced by the transducer MW.
  • the line voltage U is briefly switched off for synchronization.
  • a capacitor C1 is therefore provided, which supplies the transducer MW during this time.
  • the diode D1 prevents feedback.
  • the transistor TR1 switches the detection line through to the subsequent detector.
  • the analog detector measured value influencing the timing element T1 in accordance with its size is followed by a second timer T2, which is switched on at the same time.
  • the output of the second timer T2 drives the second transistor TR2, which is connected to the signaling loop ML via the resistor R.
  • An additional current pulse flows through the resistor R, which briefly amplifies the line current.
  • This additional current pulse can be influenced in a defined manner and can therefore serve as additional information.
  • detector detection can be transmitted to the control center at the same time as the detector measurement and the detector address.
  • the resistance value of the resistor R influences the amplitude
  • the second timer T2 influences the duration of the additional current pulse. Either the pulse amplitude or the pulse duration can be varied with this method.
  • a combination of the two methods can also be carried out, so that in addition to the detector measured value and the detector address, two identifier variables can also be transmitted for the detector to the control center.
  • the current profile I L on the detection line ML during an interrogation shows the current profile I L on the detection line ML during an interrogation.
  • Different detector types have different resistance values for the resistor R, so that with the corresponding resistance value the detector detection, for example detector type, can be adjusted. Since the resistance R influences the amplitude A of the additional current pulse, the height of the amplitude A is a parameter for the detector. If the pulse duration, which depends on the timing element T2 according to FIG. 1, is kept constant for all detectors, the pulse width t is constant for all detectors. With the start of an interrogation cycle of a detector line, the first detector is switched on, for example, at time t1. The duration of the connection is determined by the detector measured value via the first timer T1 of the detector and is shown in the pulse diagram as the duration T ri .
  • the additional current pulse is drawn on the line via the load resistor 2, so that this additional current pulse has an amplitude height A1.
  • the pulse duration of the additional pulse is constant for all detectors and is t.
  • the second detector is switched on via transistor TR1. From the switching on of the first load resistance of the first detector to the switching on of the load resistor of the second detector, the time T 12 passes until the load resistance of the second detector causes the additional current pulse with the amplitude A2 until time t3. In this way, the detectors are switched on in a chain-like manner and each additional current pulse is provided with a characteristic amplitude corresponding to the detector detection in question. This amplitude level can be evaluated and stored in the control center for the respective detector concerned.
  • FIG. 4 shows the current profile I L on the detection line during an interrogation.
  • the resistance R and thus the amplitude A is constant in each detector and the time duration T11, T 12 etc. of the timing element T2 is varied differently for each detector.
  • the detector parameter is set, for example, with the RC element R T , C T. 4 shows a behavior similar to that of FIG. 3, with the difference that the amplitude A of the additional current pulse is constant, whereas the pulse duration t 1 , t 2 , t 3 , etc. of the additional current pulse varies and is a characteristic measure of the detector detection of the respective detector.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Alarm Systems (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Burglar Alarm Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Audible And Visible Signals (AREA)
  • Fire Alarms (AREA)
EP83106448A 1982-07-05 1983-07-01 Verfahren und Einrichtung zur automatischen Abfrage des Meldermesswerts und der Melderkennung in einer Gefahrenmeldeanlage Expired EP0098554B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83106448T ATE17532T1 (de) 1982-07-05 1983-07-01 Verfahren und einrichtung zur automatischen abfrage des meldermesswerts und der melderkennung in einer gefahrenmeldeanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3225081 1982-07-05
DE19823225081 DE3225081A1 (de) 1982-07-05 1982-07-05 Verfahren und einrichtung zur automatischen abfrage des meldermesswerts und der melderkennung in einer gefahrenmeldeanlage

Publications (2)

Publication Number Publication Date
EP0098554A1 EP0098554A1 (de) 1984-01-18
EP0098554B1 true EP0098554B1 (de) 1986-01-15

Family

ID=6167659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106448A Expired EP0098554B1 (de) 1982-07-05 1983-07-01 Verfahren und Einrichtung zur automatischen Abfrage des Meldermesswerts und der Melderkennung in einer Gefahrenmeldeanlage

Country Status (8)

Country Link
EP (1) EP0098554B1 (enrdf_load_stackoverflow)
JP (1) JPS5920098A (enrdf_load_stackoverflow)
AT (1) ATE17532T1 (enrdf_load_stackoverflow)
BR (1) BR8303565A (enrdf_load_stackoverflow)
DE (2) DE3225081A1 (enrdf_load_stackoverflow)
DK (1) DK155387C (enrdf_load_stackoverflow)
ES (1) ES8404082A1 (enrdf_load_stackoverflow)
GR (1) GR77588B (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE42851T1 (de) * 1984-09-12 1989-05-15 Siemens Ag Einrichtung zur melderidentifizierung in einer gefahrenmeldeanlage.
NO168006C (no) * 1985-02-27 1992-01-02 Nohmi Bosai Kogyo Co Ltd Branndetekteringssystem.
GB8616276D0 (en) * 1986-07-03 1986-08-13 Racal Chubb Ltd Data acquisition system
US5140622A (en) * 1990-04-04 1992-08-18 Idec Izumi Corporation Data transmission system with double lines
DE4321292A1 (de) * 1993-06-26 1995-01-05 Bayerische Motoren Werke Ag Verfahren zur seriellen Übertragung von Meßsignalen mehrerer Meßparameter
DE19717933A1 (de) * 1997-04-29 1998-11-05 Thomson Brandt Gmbh Schaltungsanordnung mit einem Geber und einer Auswerteschaltung
CN115232651B (zh) * 2021-04-23 2024-03-29 中国石油化工股份有限公司 煤气化装置的工艺参数监测预警方法及装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51110212A (ja) * 1975-03-24 1976-09-29 Nippon Telegraph & Telephone Parusutajudensohoshiki
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
DE2533330C3 (de) * 1975-07-25 1981-08-13 Siemens AG, 1000 Berlin und 8000 München Verfahren und Einrichtung zur Übertragung von Meßwerten in einem Brandmeldesystem
DE2533354C3 (de) * 1975-07-25 1979-08-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Einrichtung zum Übertragen von Steuerbefehlen in einem Brandschutzsystem
DE2638068C3 (de) * 1976-08-24 1986-11-13 Siemens AG, 1000 Berlin und 8000 München Brandmeldeanlage mit mehreren über eine Meldeschleife betreibbaren Meldern
DE2836760C2 (de) * 1978-08-23 1983-11-17 Dr. Alfred Ristow GmbH & Co, 7500 Karlsruhe Elektronisches Fernüberwachungssystem

Also Published As

Publication number Publication date
DK308283A (da) 1984-01-06
BR8303565A (pt) 1984-02-14
DK155387C (da) 1989-10-30
DE3225081A1 (de) 1984-01-12
ATE17532T1 (de) 1986-02-15
DK308283D0 (da) 1983-07-04
DK155387B (da) 1989-04-03
ES523866A0 (es) 1984-04-01
ES8404082A1 (es) 1984-04-01
GR77588B (enrdf_load_stackoverflow) 1984-09-24
DE3361851D1 (en) 1986-02-27
JPS5920098A (ja) 1984-02-01
EP0098554A1 (de) 1984-01-18

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