EP0178451B1 - Dispositif d'identification d'avertisseurs dans un système d'alarme - Google Patents
Dispositif d'identification d'avertisseurs dans un système d'alarme Download PDFInfo
- Publication number
- EP0178451B1 EP0178451B1 EP85111385A EP85111385A EP0178451B1 EP 0178451 B1 EP0178451 B1 EP 0178451B1 EP 85111385 A EP85111385 A EP 85111385A EP 85111385 A EP85111385 A EP 85111385A EP 0178451 B1 EP0178451 B1 EP 0178451B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annunciator
- current
- line
- alarm
- signal line
- 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
Links
- 238000011156 evaluation Methods 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 3
- 238000011144 upstream manufacturing Methods 0.000 claims abstract 2
- 230000005669 field effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 7
- 238000009420 retrofitting Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- 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
- G08B26/005—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 device for detector identification in a hazard alarm system, in particular a fire alarm system, according to the preamble of patent claim 1.
- detector identification is readily possible.
- alarm systems use special detectors and control panels, so that a complete retrofitting of existing systems would be required.
- Hazard detection systems with detector identification are known per se. However, they usually require specially designed detectors, the addresses of which must be encoded in the individual detector for identification. Corresponding evaluation devices in the control center can then determine and display the address of the detector concerned from the code transmitted or queried by the detector.
- Retrofitting an existing system requires not only the retrofitting in the control center, but also detectors equipped with a codable addressing device. These measures disadvantageously result in high costs and also an individual setting of the respective detector coding in the individual detectors.
- the object of the invention is therefore to avoid the disadvantages described and to create additional circuit arrangements for the individual detectors and for the control center for a hazard detection system described at the outset, such as has been sold by the applicant for years, which permit simple and reliable detector identification, without the detector address having to be set individually in each detector.
- the device according to the invention for detector identification in a hazard alarm system consists of simple additions and can advantageously also be retrofitted in existing systems without influencing the original functions. It is particularly advantageous that no individual address has to be set at the detector location, but that the detector address is determined by the sequence of the detectors on the detector line. This eliminates the facilities and work otherwise required for setting the address. In addition, the system is also more reliable, since incorrect multiple assignment of an address and other incorrect settings are avoided.
- FIG. 2 shows a detector identification circuit arrangement for recognizing and displaying the detector address in the control center.
- FIG. 1 A circuit arrangement according to the invention for a detector add-on for detector identification is shown in FIG. 1.
- the detector additional circuit arrangement MZS1 is arranged in front of the actual detector M1 in the message line ML. It is connected to the control center Z via the terminals 1 and 4 and to the following detector additional circuit arrangement MZS2, which is followed by a detector M2, etc., via the terminals 1 'and 5.
- the detector M1 itself is connected to terminals a and b. Terminals 1, 1 'and a are positive compared to terminals 4, b and 5.
- the line voltage UL lies between terminals 1 and 4, which e.g. Can be 20 volts.
- the line current IL is, for example, 5 mA in the idle state and consists of the monitoring current through a terminating resistor at the end of the signal line ML (not shown here) and the sum of the supply currents of all detector additional circuit arrangements MZS1, MZS2, etc. and detectors M1, M2 etc.
- a flip-flop FF provided in the detector additional circuit arrangement MZS1 is supplied with the line voltage UL via the connections (+) and (-) and was set when the line voltage UL was switched on via a first differentiating element R1, C1 and the set input S so that the output Ci via the blocked Zener diode ZD and the resistor RT the transistor TR is turned on and thus the line voltage of 20 volts is also at the terminals 1 ', 5 and via the light emitting diode LED and the resistor RL at the terminals a and b.
- the detector add-ons MZS1, MZS2, ... this state is repeated for all subsequent detector add-ons and detectors.
- the voltage across the series connection of the resistor RL and the light-emitting diode LED and the detector M1 breaks down to 10 volts.
- the central current Z limits the line current (IL) to a first current limit of 10 mA.
- the control center Z detects this state and then increases its current output capability to a second current limit value of 100 mA (flashing cycle) in a predetermined clock ratio, for example in a second rhythm, and outputs these current pulses (IPZ) to the
- This process is continued in chronological order with each further current pulse (IPZ).
- a detector identification circuit arrangement is assigned to the evaluation device and inserted into the detection line.
- This detector identification circuit arrangement monitors the entire line current of all connected signal lines and counts the current pulses in the event of an alarm.
- the detector identification circuit arrangement recognizes the first current pulse with increased current flow (100 mA) and thus the number of the alarm triggering detector. This number is saved and displayed on an encoder, for example on a two-digit 7-segment display. Together with the display of the alarm line that triggers the alarm, the relevant detector is clearly identified.
- a detector identification circuit device MIS according to the invention is shown in FIG. 2.
- the common supply voltage UV of e.g. 24 volts connected.
- All of the evaluation circuits AWE of the individual signal lines ML which are not shown here and are common in the known systems, are fed from the terminals 7 'and 9, in which the specific voltage and current values described above are generated.
- the common line current IL flows through a measuring resistor RM arranged in the wire 8-9 of the signal line ML and is in this embodiment as a voltage drop across the operational amplifier OV, the gain of which is set with the resistors R3 and R4, the input E of the analog-digital AD converter supplied.
- the analog-to-digital converter AD is initiated by microcomputer MR, which is acted upon at its input B by the central-side current pulses IPZ (flashing clock) for the correct determination of the pulse current size.
- the analog-to-digital converter AD supplies the digitized current quantity to the microcomputer MR at its multipole output QW.
- the address of the alarm-triggering detector is determined, processed in an appropriately prepared form via the multi-pin output QR of the two-digit digital display ANZ and displayed there.
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
- Fire Alarms (AREA)
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85111385T ATE42851T1 (de) | 1984-09-12 | 1985-09-09 | Einrichtung zur melderidentifizierung in einer gefahrenmeldeanlage. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3433479 | 1984-09-12 | ||
DE3433479 | 1984-09-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0178451A1 EP0178451A1 (fr) | 1986-04-23 |
EP0178451B1 true EP0178451B1 (fr) | 1989-05-03 |
Family
ID=6245221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85111385A Expired EP0178451B1 (fr) | 1984-09-12 | 1985-09-09 | Dispositif d'identification d'avertisseurs dans un système d'alarme |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0178451B1 (fr) |
AT (1) | ATE42851T1 (fr) |
DE (1) | DE3569997D1 (fr) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1297008B (de) * | 1967-01-11 | 1969-06-04 | Siemens Ag | Meldeanlage mit in einer zweiadrigen Schleife parallelgeschalteten Meldern |
DE2230934B1 (de) * | 1972-06-23 | 1973-02-15 | Preussag Ag, Feuerschutz, 2060 Bad Oldesloe | Meldeeinrichtung, vorzugsweise zur Brandmeldung |
DE2245928A1 (de) * | 1972-09-19 | 1974-04-04 | Preussag Ag Feuerschutz | Verfahren und einrichtung zur zentralen erfassung von ausgeloesten detektoren |
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 |
DE2935335C2 (de) * | 1979-08-31 | 1985-08-08 | Siemens AG, 1000 Berlin und 8000 München | Gleichstrommeldeanlage |
DE3225081A1 (de) * | 1982-07-05 | 1984-01-12 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und einrichtung zur automatischen abfrage des meldermesswerts und der melderkennung in einer gefahrenmeldeanlage |
-
1985
- 1985-09-09 EP EP85111385A patent/EP0178451B1/fr not_active Expired
- 1985-09-09 DE DE8585111385T patent/DE3569997D1/de not_active Expired
- 1985-09-09 AT AT85111385T patent/ATE42851T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3569997D1 (en) | 1989-06-08 |
ATE42851T1 (de) | 1989-05-15 |
EP0178451A1 (fr) | 1986-04-23 |
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