EP1777670A2 - Détecteur de fumée - Google Patents

Détecteur de fumée Download PDF

Info

Publication number
EP1777670A2
EP1777670A2 EP06020998A EP06020998A EP1777670A2 EP 1777670 A2 EP1777670 A2 EP 1777670A2 EP 06020998 A EP06020998 A EP 06020998A EP 06020998 A EP06020998 A EP 06020998A EP 1777670 A2 EP1777670 A2 EP 1777670A2
Authority
EP
European Patent Office
Prior art keywords
light
reflector
signal
intensity
reflection signal
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
EP06020998A
Other languages
German (de)
English (en)
Other versions
EP1777670A3 (fr
EP1777670B1 (fr
Inventor
Hans-Erich Sen Gubela
Hans-Erich Jun. Gubela
Markus Huber
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.)
IMOS Gubela GmbH
Original Assignee
IMOS Gubela GmbH
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.)
Filing date
Publication date
Application filed by IMOS Gubela GmbH filed Critical IMOS Gubela GmbH
Publication of EP1777670A2 publication Critical patent/EP1777670A2/fr
Publication of EP1777670A3 publication Critical patent/EP1777670A3/fr
Application granted granted Critical
Publication of EP1777670B1 publication Critical patent/EP1777670B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • 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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/043—Monitoring of the detection circuits of fire detection circuits
    • 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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Definitions

  • the invention relates to a smoke detector, which is insensitive to interference from extraneous light or unwanted reflections.
  • a fail-safe smoke detector (1) it is proposed to form the sensor system as a reflex light barrier, so that a light signal (6) is constantly emitted by a light transmitter (2) onto a reflector (5).
  • the reflector reflects the signal as a reflection (7) on a light receiver (3).
  • the light signal (6) is intensity-modulated with a fixed clock frequency.
  • the received signal (7) can be recognized at its clock frequency, so that extraneous light is excluded for signal evaluation in the electronics (4).
  • Particularly suitable for the signal evaluation proposed in the German Patent DE 103 00 223 B3 the disclosure content of which is to be included in the disclosure content of this application, to use the described measuring arrangement and method for the phase-correct compensation of a signal.
  • the smoke detector according to the invention constantly emits a light signal (6) and evaluates its reflection (7), further reflections interfere within of the housing, the measurement, because they are detected as a reflection of the transmitted signal (6) and evaluated as such in the measurement. By contrast, penetrating extraneous light does not participate in the measurement.
  • the reflector (5) may simply be an untreated wall or part of the housing. Because the smoke detector can adjust to the reflector, as explained below in the description of the "maintenance cycle".
  • the reflector can also be a reflective foil made of microspheres or microtriples, but especially as a microcube reflector, as in the DE 197 27 527 C2 , the disclosure content of which is to be included in the disclosure content of this application, is described, because these are suitable as "IMOS" reflectors on the market cubic reflectors for maximum ranges for Reflexsensorsysteme, in particular those in the DE 102 16 579 A1 and EP 1 251 367 B1 , the disclosure content of which is to be included in the disclosure content of this application, described IMOS wide-angle reflectors are preferred as a reflective surface, if over an arc of well over 80 °, for example, with the HALIOS system, the reflector should be observed.
  • the smoke detector can be designed for the smallest observation areas, for example within a small machine and also in large workshops for monitoring of distances of over 100 m. Because of the reflector, the possible distance between the light emitter (2) and the reflector (5) can be varied considerably. This advantage is obtained by the smoke detector in that it does not use the previous sensor system that detects reflections, but rather its novel system, which initially relies on the measuring system used to emit a continuous measuring beam and also to constantly receive it as a reflection.
  • the smoke detector does not lose its function due to dust accumulation due to dust accumulation or due to aging of the electronic components changes measured values that could lead to malfunctions, it regularly switches between a work cycle and a maintenance cycle.
  • the work cycle can be described particularly well, based on the HALIOS principle mentioned above.
  • the emitted signal (6) is readjusted using a compensation LED when the reflection signal (7) has changed. This means that if a readjustment in the work cycle is required, then the beam path has been disturbed, for example by smoke or smoke particles.
  • the smoke detector triggers an alarm.
  • the duty cycle has a tolerance range in which it does not readjust, that is, the duty cycle depends on the disturbance. Only from a certain disturbance alarm is triggered.
  • the aging of the electronic components and the changes on the reflector (5) are compensated by low dust deposits. Because the work cycle is interrupted. In the maintenance cycle, the measuring electronics are allowed, even below the threshold value, which would trigger an alarm if exceeded, to readjust. This means that the smoke detector finds a new state of equilibrium by readjustment. The readjustment in the maintenance state does not lead to the alarm. In addition, before judging maintenance, a vibrator or blower can remove the deposited dust from the smoke detector. In a very small construction, it is proposed to use a micropump as a blower. This requires little energy, so that even battery-powered smoke detectors according to the invention can clean themselves during the maintenance cycle.
  • This smoke detector described here thus solves fundamental problems of the detection of smoke. He is not disturbed by extraneous light. He is special when using the HALIOS measuring principle during the working cycle, very sensitive to smoke and smoke particles, because any change in the reflected beam (7) would then lead to readjustment if the change were outside the tolerance range. In the maintenance phase, however, there is no tolerance range, but it is mandatory to readjusted to find a new balance of the measuring system. This newly adjusted balance serves as the starting condition for the following new cycle.
  • the novel smoke detector also has no problem with unwanted reflections of its transmission signal (6) within its housing (8). For he recognizes these reflections as emitted by him and as part of his reception measurement in the light receiver (3).
  • the smoke detector does not need a darkroom in the housing as before, no extraneous light protection and no measures to suppress reflections.
  • the smoke detector can free itself of dust deposits in the maintenance phase, can adapt to slowly progressive changes in its environmental situation and / or aging and power consumption of electronic components by readjustment during the maintenance cycle.
  • the smoke detector indicate its duty cycle and / or maintenance cycle by, for example, an LED. It is particularly suitable that the smoke detector gives a signal for manual maintenance by a maintenance expert after a predetermined number of maintenance cycles. So a permanent safety through the smoke detector is possible.
  • the smoke detector (1) consisting of the light emitter (2), the light receiver (3), the electronics (4), the control, as "R" marked, for the duty cycle and the maintenance cycle contains, and a reflector (5).
  • the light transmitter (2) sends a light signal (6) to the reflector (5).
  • the light signal is reflected by the reflector (5) as a reflection signal (7) to the light receiver (3).
  • the received light signal (7) is evaluated by the electronics (4).
  • the described sensor arrangement is accommodated in a housing (8).
  • the housing has openings (9), which allow the smoke to enter.
  • the electronics (4) are designed so that they can detect even the slightest intensity variations of the signal.
  • the sensor system described above can be used not only as a smoke detector.
  • the evaluation electronics can be designed such that they can count the occurring disturbances by means of a counter.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP06020998A 2005-10-19 2006-10-06 Détecteur de fumée Not-in-force EP1777670B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005050451A DE102005050451A1 (de) 2005-10-19 2005-10-19 Rauchdetektor

Publications (3)

Publication Number Publication Date
EP1777670A2 true EP1777670A2 (fr) 2007-04-25
EP1777670A3 EP1777670A3 (fr) 2007-07-25
EP1777670B1 EP1777670B1 (fr) 2009-01-21

Family

ID=37680613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06020998A Not-in-force EP1777670B1 (fr) 2005-10-19 2006-10-06 Détecteur de fumée

Country Status (3)

Country Link
EP (1) EP1777670B1 (fr)
AT (1) ATE421742T1 (fr)
DE (2) DE102005050451A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3889579A1 (fr) * 2020-03-30 2021-10-06 Carrier Corporation Système de nettoyage pour un détecteur de fumée

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11900791B2 (en) * 2022-04-26 2024-02-13 Honeywell International Inc. Self-testing fire sensing device for confirming a fire

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261024B (de) * 1961-10-13 1968-02-08 Licentia Gmbh Lichtelektrische Schranke
US3641549A (en) * 1970-06-25 1972-02-08 Sanders Associates Inc Electro-optical perimeter intrusion alarm
US3885162A (en) * 1973-10-31 1975-05-20 Contraves Goerz Corp Optical measuring apparatus
EP0631263A1 (fr) * 1993-06-23 1994-12-28 HEKATRON GmbH Dispositif détecteur optique pour la surveillance d'environnement et l'indication d'un milieu perturbateur
DE4432114C1 (de) * 1994-09-09 1995-06-08 Hella Kg Hueck & Co Schaltungsanordnung zur Fremdlichtunterdrückung bei einer Lichtschrankenanordnung
JPH07239958A (ja) * 1994-02-28 1995-09-12 Ito Seisakusho:Kk 乗員確認装置
JP2001034863A (ja) * 1999-07-22 2001-02-09 Sumitomo Densetsu Corp エアブロー式火災報知システム
US20040063154A1 (en) * 2002-08-23 2004-04-01 Booth David K. Rapidly responding, false detection immune alarm signal producing smoke detector
DE10346741B3 (de) * 2003-10-08 2005-03-24 Mechaless Systems Gmbh Verfahren zur Bestimmung und/oder Auswertung eines differentiellen optischen Signals

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261024B (de) * 1961-10-13 1968-02-08 Licentia Gmbh Lichtelektrische Schranke
US3641549A (en) * 1970-06-25 1972-02-08 Sanders Associates Inc Electro-optical perimeter intrusion alarm
US3885162A (en) * 1973-10-31 1975-05-20 Contraves Goerz Corp Optical measuring apparatus
EP0631263A1 (fr) * 1993-06-23 1994-12-28 HEKATRON GmbH Dispositif détecteur optique pour la surveillance d'environnement et l'indication d'un milieu perturbateur
JPH07239958A (ja) * 1994-02-28 1995-09-12 Ito Seisakusho:Kk 乗員確認装置
DE4432114C1 (de) * 1994-09-09 1995-06-08 Hella Kg Hueck & Co Schaltungsanordnung zur Fremdlichtunterdrückung bei einer Lichtschrankenanordnung
JP2001034863A (ja) * 1999-07-22 2001-02-09 Sumitomo Densetsu Corp エアブロー式火災報知システム
US20040063154A1 (en) * 2002-08-23 2004-04-01 Booth David K. Rapidly responding, false detection immune alarm signal producing smoke detector
DE10346741B3 (de) * 2003-10-08 2005-03-24 Mechaless Systems Gmbh Verfahren zur Bestimmung und/oder Auswertung eines differentiellen optischen Signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3889579A1 (fr) * 2020-03-30 2021-10-06 Carrier Corporation Système de nettoyage pour un détecteur de fumée
US11913873B2 (en) 2020-03-30 2024-02-27 Carrier Corporation Cleaning system for a smoke detector

Also Published As

Publication number Publication date
DE102005050451A1 (de) 2007-05-03
EP1777670A3 (fr) 2007-07-25
ATE421742T1 (de) 2009-02-15
DE502006002695D1 (de) 2009-03-12
EP1777670B1 (fr) 2009-01-21

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