DE58908329D1 - Method and device for compensating for air humidity in an optical smoke detector. - Google Patents

Method and device for compensating for air humidity in an optical smoke detector.

Info

Publication number
DE58908329D1
DE58908329D1 DE58908329T DE58908329T DE58908329D1 DE 58908329 D1 DE58908329 D1 DE 58908329D1 DE 58908329 T DE58908329 T DE 58908329T DE 58908329 T DE58908329 T DE 58908329T DE 58908329 D1 DE58908329 D1 DE 58908329D1
Authority
DE
Germany
Prior art keywords
measured value
humidity
smoke density
air humidity
measured
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 - Fee Related
Application number
DE58908329T
Other languages
German (de)
Inventor
Helfried Dipl Ing Lappe
Otfried Dipl Ing Post
Peer Dr Ing Thilo
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
Original Assignee
Siemens 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 AG filed Critical Siemens AG
Application granted granted Critical
Publication of DE58908329D1 publication Critical patent/DE58908329D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

In addition to the fire characteristic of smoke density (MWR), the environmental characteristic of relative air humidity (F) is measured in the scattered-light detector using a humidity sensor (FS) arranged in the measuring chamber (MK). A humidity measured value (MWF) is determined from the measured relative air humidity (F) by means of a measured value linearisation device, the smoke density measured value (MWR) being compensated by the humidity measured value (MWF) above a specific measured value for the relative air humidity (F). The compensated smoke density measured value (KMWR) is processed further in order to form alarm criteria. In this case, the compensation can be performed in the scattered-light detector (SM) or in the control centre (Z), the compensated smoke density measured values (KMWR) or the smoke density measured values (MWR) and the humidity measured values (MWF) being transmitted periodically to the control centre (Z). <IMAGE>
DE58908329T 1989-09-19 1989-09-19 Method and device for compensating for air humidity in an optical smoke detector. Expired - Fee Related DE58908329D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89117328A EP0418410B1 (en) 1989-09-19 1989-09-19 Method and device for compensating the air humidity in an optical smoke alarm

Publications (1)

Publication Number Publication Date
DE58908329D1 true DE58908329D1 (en) 1994-10-13

Family

ID=8201906

Family Applications (1)

Application Number Title Priority Date Filing Date
DE58908329T Expired - Fee Related DE58908329D1 (en) 1989-09-19 1989-09-19 Method and device for compensating for air humidity in an optical smoke detector.

Country Status (4)

Country Link
EP (1) EP0418410B1 (en)
AT (1) ATE111246T1 (en)
DE (1) DE58908329D1 (en)
ES (1) ES2061859T3 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4307585C1 (en) * 1993-03-10 1994-03-10 Siemens Ag Compensating for air humidity in stray light signal unit for fire alarm system - contg. first light transmitter with associated optic and light receiver with associated optic with its output signal representing measured value of smoke density
ATE244912T1 (en) * 1997-10-21 2003-07-15 Siemens Ag ROOM MONITORING SENSOR
US6967582B2 (en) * 2002-09-19 2005-11-22 Honeywell International Inc. Detector with ambient photon sensor and other sensors
DE102004020489B4 (en) * 2004-04-26 2007-06-28 Minimax Gmbh & Co. Kg Fire detector for use in outdoor atmosphere
DE102004032294B4 (en) * 2004-07-03 2012-02-09 Minimax Gmbh & Co. Kg Heated fire alarm
EP1732049A1 (en) 2005-06-10 2006-12-13 Siemens S.A.S. Fire or smoke detector with high false alarm rejection performance
US7642924B2 (en) 2007-03-02 2010-01-05 Walter Kidde Portable Equipment, Inc. Alarm with CO and smoke sensors
CN111263958B (en) 2017-10-30 2022-05-27 开利公司 Compensator in detector device
CN111627182B (en) * 2020-05-27 2023-07-18 深圳市高新投三江电子股份有限公司 Smoke sensor with independent condensation identification bin and use method
CN111540159B (en) * 2020-05-27 2023-07-25 深圳市高新投三江电子股份有限公司 Smoke alarm capable of directionally eliminating condensation interference and use method
CN111540158B (en) * 2020-05-27 2023-08-15 深圳市高新投三江电子股份有限公司 Smoke alarm with condensation identification function and use method
CN111564019B (en) * 2020-05-27 2023-09-12 深圳市高新投三江电子股份有限公司 Smoke-sensitive fire detector capable of resisting exposure interference and use method
CN112907884B (en) * 2021-04-20 2022-04-29 无锡商业职业技术学院 Smoke detection method with low false alarm rate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464653A (en) * 1981-12-09 1984-08-07 The Bendix Corporation Combustible gas detection system
DE3313137A1 (en) * 1983-04-12 1984-10-18 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR CANCELING NOISE IN OPTICAL SMOKE DETECTORS
JPS60144458U (en) * 1984-03-05 1985-09-25 ホーチキ株式会社 fire detection device

Also Published As

Publication number Publication date
ATE111246T1 (en) 1994-09-15
ES2061859T3 (en) 1994-12-16
EP0418410A1 (en) 1991-03-27
EP0418410B1 (en) 1994-09-07

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee