EP0137497B2 - Verfahren und Anordnung zur analogen Messwertübertragung der jeweiligen Brandkenngrössen eines Mehrkriterien-Brandmelders - Google Patents

Verfahren und Anordnung zur analogen Messwertübertragung der jeweiligen Brandkenngrössen eines Mehrkriterien-Brandmelders Download PDF

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Publication number
EP0137497B2
EP0137497B2 EP84112162A EP84112162A EP0137497B2 EP 0137497 B2 EP0137497 B2 EP 0137497B2 EP 84112162 A EP84112162 A EP 84112162A EP 84112162 A EP84112162 A EP 84112162A EP 0137497 B2 EP0137497 B2 EP 0137497B2
Authority
EP
European Patent Office
Prior art keywords
fire
detector
transmission
alarm
measuring
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 - Lifetime
Application number
EP84112162A
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German (de)
English (en)
French (fr)
Other versions
EP0137497A3 (enrdf_load_stackoverflow
EP0137497B1 (de
EP0137497A2 (de
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
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Siemens AG
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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(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT84112162T priority Critical patent/ATE31831T1/de
Publication of EP0137497A2 publication Critical patent/EP0137497A2/de
Publication of EP0137497A3 publication Critical patent/EP0137497A3/xx
Application granted granted Critical
Publication of EP0137497B1 publication Critical patent/EP0137497B1/de
Publication of EP0137497B2 publication Critical patent/EP0137497B2/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

Definitions

  • the invention relates to a method for analog measured value transmission according to the preamble of claim 1 and to an arrangement for performing this method.
  • an optical scattered light detector primarily detects the smoke from smoldering fires, but reacts poorly to open cellulose fires or to some liquid fires.
  • a heat differential detector behaves in exactly the opposite way. He cannot detect smoldering fires with low heat development, but open fires with high heat development.
  • detectors are selected that detect the expected fire well. Of course, this requires considerable planning effort; however, a residual risk remains. In very critical individual cases, these detectors are therefore supplemented by additional other detector types.
  • heat detectors can be provided in addition to smoke detectors, which makes the systems more expensive. That is why fire detectors have already been combined, which, for example, have a heat detector part for the smoke detector part.
  • Such multi-criteria fire detectors are known per se.
  • DE-AS 2 452 839 describes a fire detector with at least two sensors reacting to different fire phenomena with a common evaluation circuit. If the one sensor is influenced by a fire phenomenon, the evaluation circuit can change the response threshold of the other sensor for the alarm signals in the sense of an increase in 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.
  • the known monitoring device has a central monitoring and alarm device to which a plurality of remote end units are connected via a data transmission control unit via a loop. A number of individual detectors are connected to each remote end unit. To transmit the measured values of the individual detectors, the respective remote end unit has a multiplexer which is connected to the line loop via an analog-digital converter of a downstream data transmission end control circuit and a downstream station for the line loop.
  • the program control circuit allows the multiplexer to sequentially sample, digitize, address and transmit the analog signals from the respective detectors to the central monitoring and alarm device.
  • neither multi-criteria fire detectors are provided, nor is there an indication that the transmission of the different fire parameters of a multi-criteria fire detector is controlled as a function of the rate of change of the respective fire parameter.
  • 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 fire parameters, which are recorded independently of one another, either alternately or jointly to the control center.
  • a separate transmission device is provided, which is connected together to the common signaling line, or a common transmission device is provided, which is alternately connected to the respective measuring and processing devices for the various fire parameters using a control device.
  • the individual transmission devices are polled one after the other from the central office or the transmission device is polled cyclically.
  • the alternating connection can expediently be controlled as a function of the rate of change of the respective fire parameter by the 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.
  • a multi-criteria detector MM is shown schematically in FIG.
  • the MM detector there is a HL hot conductor 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, as well as a detector base MS, which also has the necessary connection terminals for the installation.
  • FIG. 2 shows in the 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 .
  • 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.
  • 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 ST control unit is connected to the smoke and heat processing equipment (VE-R and VE-W).
  • This arrangement only requires a transmission device, but a control device which, in the simplest case, causes the cyclical connections of both measuring devices.
  • control device controls the changeover switch depending on 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 measured 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 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 Rauch MVE-R, which is known per se and need not be described 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 hot conductor RW.
  • the voltage UR which is proportional to the smoke density, is present at the output of the measuring and processing device for smoke MVE-R.
  • the voltage UMP is applied to the thermistor RW for temperature measurement.
  • the voltage UMP picked up there is the common measuring voltage, which is the product of the smoke and the heat measurement signal. This common measuring voltage UMP is transmitted to the control center when queried.
  • FIG. 5 shows an embodiment for the addition of two fire parameters, namely smoke and heat measurement signals.
  • the measurement 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 hot conductor 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 applied to the summation point SP via the series resistor RV1 guided.
  • the common measurement 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 measurement 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 Verfahren und Anordnung zur analogen Messwertübertragung der jeweiligen Brandkenngrössen eines Mehrkriterien-Brandmelders Expired - Lifetime EP0137497B2 (de)

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
DE19833337330 DE3337330A1 (de) 1983-10-13 1983-10-13 Verfahren und anordnung zur analogen messwertuebertragung der jeweiligen brandkenngroessen eines mehrkriterien-brandmelders
DE3337330 1983-10-13

Publications (4)

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

Family

ID=6211784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112162A Expired - Lifetime EP0137497B2 (de) 1983-10-13 1984-10-10 Verfahren und Anordnung zur analogen Messwertübertragung der jeweiligen Brandkenngrössen eines Mehrkriterien-Brandmelders

Country Status (3)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418411B1 (de) * 1989-09-19 1994-03-02 Siemens Aktiengesellschaft Brandmeldeanlage mit einem Kombinationsmelder
JP3724689B2 (ja) * 1998-10-30 2005-12-07 ホーチキ株式会社 火災監視装置及び火災感知器

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 (enrdf_load_stackoverflow) * 1973-11-09 1976-01-30 Nohmi Bosai Kogyo Co Ltd

Also Published As

Publication number Publication date
EP0137497A3 (enrdf_load_stackoverflow) 1985-06-12
DE3468564D1 (en) 1988-02-11
EP0137497B1 (de) 1988-01-07
DE3337330A1 (de) 1985-04-25
ATE31831T1 (de) 1988-01-15
EP0137497A2 (de) 1985-04-17

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