EP0137497A2 - Procédé et agencement pour la transmission analogique de la valeur mesurée des grandeurs respectives de fumée d'un détecteur de fumée à plusieurs critères - Google Patents

Procédé et agencement pour la transmission analogique de la valeur mesurée des grandeurs respectives de fumée d'un détecteur de fumée à plusieurs critères Download PDF

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Publication number
EP0137497A2
EP0137497A2 EP84112162A EP84112162A EP0137497A2 EP 0137497 A2 EP0137497 A2 EP 0137497A2 EP 84112162 A EP84112162 A EP 84112162A EP 84112162 A EP84112162 A EP 84112162A EP 0137497 A2 EP0137497 A2 EP 0137497A2
Authority
EP
European Patent Office
Prior art keywords
fire
measuring
detector
smoke
transmission
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
EP84112162A
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German (de)
English (en)
Other versions
EP0137497B2 (fr
EP0137497B1 (fr
EP0137497A3 (fr
Inventor
Peer Dr. Ing. Thilo
Romuald Dipl.-Ing. Von Tomkewitsch
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.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6211784&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0137497(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to AT84112162T priority Critical patent/ATE31831T1/de
Publication of EP0137497A2 publication Critical patent/EP0137497A2/fr
Publication of EP0137497A3 publication Critical patent/EP0137497A3/xx
Application granted granted Critical
Publication of EP0137497B1 publication Critical patent/EP0137497B1/fr
Publication of EP0137497B2 publication Critical patent/EP0137497B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a method for analog measured value transmission of the respective fire parameter of a multi-criteria fire detector, which is constructed as a detector for at least two different fire parameters, in a fire alarm system with a control center and at least one alarm line, to which several, individually identifiable detectors are connected are cyclically queried from the head office and evaluated there. It also relates to an arrangement for performing this method.
  • Such multi-criteria fire detectors are known per se.
  • DE-AS 24 52 839 describes a fire detector with at least two sensors reacting to different fire phenomena with a common evaluation circuit. If the one sensor is affected by a fire phenomenon, the evaluation circuit can change the response threshold of the other sensor for the alarm signal in order to increase the sensitivity.
  • the sensors of a detector react to different fire criteria and are related to each other. For example, the respective sensor signals can be logically linked to one another in order to then emit a corresponding alarm signal from the detector.
  • Various evaluation methods for the respective detector are known.
  • the common multi-criteria detector however, has in common that the evaluation is carried out in each case in the known detector. In the individual detector, when a predetermined limit value is exceeded, an alarm signal is sent to the signaling line and transmitted to the control center.
  • the object of the invention is therefore to provide a method which allows the respective analog measured values of a multi-criteria detector which reacts to different fire parameters to be transmitted to the control center for evaluation there on a signaling line. Arrangements to carry out the method are also to be specified.
  • the multi-criteria fire detector which structurally forms a unit, but measures two different fire parameters in terms of measurement technology, has circuit devices with which it is possible to transmit the independently recorded fire parameters either alternately or jointly to the control center.
  • An advantageous method is that a separate transmission device is provided for each determined fire parameter, which are connected together to the common signaling line.
  • the individual transmission devices are queried cyclically in succession from the central office.
  • Another advantageous method is given in that only one transmission device is connected to the signaling line.
  • the transmission device is alternately to each measurement and processing equipment for the various fire parameters switched on.
  • the alternating connection is expediently controlled as a function of the rate of change of the respective fire parameter by a control device provided for this purpose in the multi-criteria detector.
  • both fire parameters are evaluated separately in the control center using methods such as those e.g. be described in DE-PS 23 41 087 and, if necessary, further processed together after the evaluation for alarming, as also specified in DE-PS 23 41 087. This enables optimal fire detection.
  • the analog measured values of the different fire parameters are jointly transmitted to the control center. For this purpose, if, for example, two different fire criteria are detected, the two measurement signals are multiplied and transmitted together to the control center. Another possibility of transmitting the two measurement signals together is to add the two measurement signals. These methods also allow more than two fire parameters to be transferred.
  • the multiplied or added fire parameters are transmitted together, the common data that has already been preprocessed at the reporting location is processed further at the headquarters. As a result, in addition to the transmission capacity, the data processing capacity in the control center can also be reduced.
  • the different transmission methods can be arbitrary if there are more than two different fire parameters be combined.
  • two different fire parameters can be added, two further fire parameters can be multiplied and these can be transferred alternately to the control center.
  • a multi-criteria detector MM is shown schematically in FIG.
  • a thermistor HL is located in the MM detector in the WM heat detector; in the smoke detector part RM there is a receiving diode ED and a transmitting diode SD.
  • the smoke detector part RM is therefore formed by a scattered light detector.
  • the detector MM contains an electronic circuit arrangement ES (not shown here) for processing and transmission devices, and a detector base MS, which also has the necessary connection terminals for the installation.
  • Fig. 2 shows in a block diagram a circuit arrangement for a combined detector which detects two fire parameters, namely smoke R and heat W.
  • two independent detectors are structurally combined in one detector, which in addition to the respective measuring device ME-R for smoke and ME-W for heat and the respective processing device VE-R for smoke and VE-W for heat each have their own transmission part exhibit.
  • the transmission part is the transmission device UE-R for smoke and the other time the transmission device UE-W for heat. Both are connected together to the ML message line, which leads to the central office Z.
  • the individual detectors are cyclically queried from the control center, the two detector parts that are independent of one another but combined in the detector are queried one after the other.
  • This has the advantage that two essentially independent detectors are installed in one and the same place, which respond to different fire parameters. This means that no additional installation work is required, and two different detectors can be queried one after the other for their respective analog detector measurement values.
  • FIG. 3 shows a similar circuit arrangement in the block diagram as in FIG. 2.
  • a single transmission device UE is connected to the detection line ML.
  • This transmission device UE is alternately connected to the measuring and processing device ME-R, VE-R for smoke and to the measuring and processing device ME-W, VE-W for heat.
  • the switchover is controlled by a control unit ST.
  • the control unit ST is connected to the processing devices for smoke and heat (VE-R and VE-W).
  • This arrangement only requires one transmission device, however, a control device which, in the simplest case, causes the two measuring devices to be switched on cyclically.
  • control device controls the changeover switch as a function of the rate of change of a respective fire parameter. If, for example, there is suddenly a strong build-up of heat, it is unnecessary to transmit the analog measurement values for the smoke detector for the cyclical detector query. The analog measured value for heat is transmitted immediately and each time the query is made, so that an alarm signal can be immediately derived in the central evaluation device due to the constant presence of the high heat measured values.
  • the detector has a measuring and processing device for smoke MVE-R, which is known per se and need not be shown in detail. It is powered by a supply voltage UV.
  • the measuring and processing device for smoke MVE-R is followed by the measuring device for heat.
  • the measuring and processing device for smoke MVE-R is connected in a simple manner via a series resistor RV, a temperature sensor, here a thermistor RW.
  • the voltage UR is present, which is proportional to the smoke density:
  • the voltage UMP is present at the thermistor RW for the temperature measurement.
  • the voltage UMP picked up there is the common measuring voltage, which is the product of the smoke and the heat measuring signal. This common measuring voltage UMP is transmitted to the control center when queried.
  • the measuring and processing device MVE-R for smoke which is supplied with a supply voltage UV, is followed by a network of resistors which, among other things, has a temperature sensor, here a thermistor RW.
  • a voltage divider consisting of resistors RV3 (series resistor) and RW (thermistor) is connected in parallel to the measuring and processing device for Rauch MVE-R and thus in parallel to the supply voltage UV.
  • the voltage which is proportional to the heat, is tapped and led to a summation point SP via a further series resistor RV2.
  • the voltage UR present at the output of the measuring and supply device for smoke MVE-R which is proportional to the smoke density, is led to the summation point SP via the series resistor RV1.
  • the common measuring voltage UMS for both fire parameters is tapped at the summation point SP.
  • the measuring resistor RMS is connected to the summation point SP.
  • the measuring voltage UMS tapped there is transmitted to the control center as an added smoke and heat signal. Combinations of the transmission methods described above are also possible for the transmission.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
EP84112162A 1983-10-13 1984-10-10 Procédé et agencement pour la transmission analogique de la valeur mesurée des grandeurs respectives de fumée d'un détecteur de fumée à plusieurs critères Expired - Lifetime EP0137497B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112162T ATE31831T1 (de) 1983-10-13 1984-10-10 Verfahren und anordnung zur analogen messwertuebertragung der jeweiligen brandkenngroessen eines mehrkriterienbrandmelders.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3337330 1983-10-13
DE19833337330 DE3337330A1 (de) 1983-10-13 1983-10-13 Verfahren und anordnung zur analogen messwertuebertragung der jeweiligen brandkenngroessen eines mehrkriterien-brandmelders

Publications (4)

Publication Number Publication Date
EP0137497A2 true EP0137497A2 (fr) 1985-04-17
EP0137497A3 EP0137497A3 (fr) 1985-06-12
EP0137497B1 EP0137497B1 (fr) 1988-01-07
EP0137497B2 EP0137497B2 (fr) 1992-03-11

Family

ID=6211784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112162A Expired - Lifetime EP0137497B2 (fr) 1983-10-13 1984-10-10 Procédé et agencement pour la transmission analogique de la valeur mesurée des grandeurs respectives de fumée d'un détecteur de fumée à plusieurs critères

Country Status (3)

Country Link
EP (1) EP0137497B2 (fr)
AT (1) ATE31831T1 (fr)
DE (2) DE3337330A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952255B4 (de) * 1998-10-30 2015-10-29 Hochiki Corp. Feuerüberwachungssystem und Brandsensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418411B1 (fr) * 1989-09-19 1994-03-02 Siemens Aktiengesellschaft Système d'avertissement d'incendie avec un avertisseur combiné

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2685798A (en) * 1947-05-15 1954-08-10 Eastman Oil Well Survey Co Apparatus for measuring and indicating various conditions such as temperature and pressure
DE2341087C3 (de) * 1973-08-14 1979-09-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Automatische Brandmeldeanlage
CH572252A5 (fr) * 1973-11-09 1976-01-30 Nohmi Bosai Kogyo Co Ltd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952255B4 (de) * 1998-10-30 2015-10-29 Hochiki Corp. Feuerüberwachungssystem und Brandsensor

Also Published As

Publication number Publication date
DE3337330A1 (de) 1985-04-25
ATE31831T1 (de) 1988-01-15
DE3468564D1 (en) 1988-02-11
EP0137497B2 (fr) 1992-03-11
EP0137497B1 (fr) 1988-01-07
EP0137497A3 (fr) 1985-06-12

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