ATE382923T1 - SCATTERED LIGHT SMOKE DETECTORS - Google Patents

SCATTERED LIGHT SMOKE DETECTORS

Info

Publication number
ATE382923T1
ATE382923T1 AT04023740T AT04023740T ATE382923T1 AT E382923 T1 ATE382923 T1 AT E382923T1 AT 04023740 T AT04023740 T AT 04023740T AT 04023740 T AT04023740 T AT 04023740T AT E382923 T1 ATE382923 T1 AT E382923T1
Authority
AT
Austria
Prior art keywords
scattered light
smoke detectors
light smoke
difference
scattered signals
Prior art date
Application number
AT04023740T
Other languages
German (de)
Inventor
August Kaelin
Dani Lippuner
Giuseppe Marbach
Original Assignee
Siemens Schweiz Ag
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 Siemens Schweiz Ag filed Critical Siemens Schweiz Ag
Application granted granted Critical
Publication of ATE382923T1 publication Critical patent/ATE382923T1/en

Links

Classifications

    • 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
    • G08B17/103—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
    • G08B17/107—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 for detecting light-scattering due to smoke

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)

Abstract

An opto-electronic structure measures first (SB) and second (SF) scattered signals at forward and backward angles of dispersion. Evaluatory electronics (12) determine an alarm value by relying on a difference in the scattered signals processed in advance. Their difference is handled with an application factor.
AT04023740T 2004-08-31 2004-10-06 SCATTERED LIGHT SMOKE DETECTORS ATE382923T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04020577A EP1630759B1 (en) 2004-08-31 2004-08-31 Scattered-light smoke detector

Publications (1)

Publication Number Publication Date
ATE382923T1 true ATE382923T1 (en) 2008-01-15

Family

ID=34926355

Family Applications (2)

Application Number Title Priority Date Filing Date
AT04020577T ATE377817T1 (en) 2004-08-31 2004-08-31 SCATTERED LIGHT SMOKE DETECTORS
AT04023740T ATE382923T1 (en) 2004-08-31 2004-10-06 SCATTERED LIGHT SMOKE DETECTORS

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT04020577T ATE377817T1 (en) 2004-08-31 2004-08-31 SCATTERED LIGHT SMOKE DETECTORS

Country Status (4)

Country Link
EP (1) EP1630759B1 (en)
AT (2) ATE377817T1 (en)
DE (2) DE502004005437D1 (en)
ES (2) ES2297311T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1884904A1 (en) * 2006-07-26 2008-02-06 Siemens Schweiz AG Danger type determination by means of at least two signals

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726633A (en) * 1995-09-29 1998-03-10 Pittway Corporation Apparatus and method for discrimination of fire types
JPH11160238A (en) * 1997-11-28 1999-06-18 Matsushita Electric Works Ltd Photoelectric smoke sensor
DE19902319B4 (en) * 1999-01-21 2011-06-30 Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 Scattered light fire detectors

Also Published As

Publication number Publication date
ES2299782T3 (en) 2008-06-01
EP1630759B1 (en) 2007-11-07
EP1630759A1 (en) 2006-03-01
DE502004005437D1 (en) 2007-12-20
ES2297311T3 (en) 2008-05-01
ATE377817T1 (en) 2007-11-15
DE502004005830D1 (en) 2008-02-14

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