FR2428289A1 - Dispositif de detection d'incendie - Google Patents

Dispositif de detection d'incendie

Info

Publication number
FR2428289A1
FR2428289A1 FR7914625A FR7914625A FR2428289A1 FR 2428289 A1 FR2428289 A1 FR 2428289A1 FR 7914625 A FR7914625 A FR 7914625A FR 7914625 A FR7914625 A FR 7914625A FR 2428289 A1 FR2428289 A1 FR 2428289A1
Authority
FR
France
Prior art keywords
comparator
fire
voltage
detection device
sensitivity
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.)
Withdrawn
Application number
FR7914625A
Other languages
English (en)
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.)
Hochiki Corp
Original Assignee
Hochiki Corp
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 Hochiki Corp filed Critical Hochiki Corp
Publication of FR2428289A1 publication Critical patent/FR2428289A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • 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

Abstract

L'invention concerne un dispositif de détection d'incendie. Ce dispositif comporte au moins un détecteur qui présente une impédance électrique qui correspond à la valeur d'un paramètre mesuré. Un comparateur de tension reçoit à une borne d'une tension qui dépend de cette impédance et à une autre borne une tension de référence. A chaque signal de sortie émis par le comparateur et constituant un signal d'incendie, la tension de référence est modifiée de manière à réduire progressivement la sensibilité du comparateur. Les signaux successifs d'incendie représentent donc des valeurs de plus en plus élevées du paramètre détecté et leur durée est modifiée progressivement de manière à permettre la discrimination à distance du niveau de sensibilité du comparateur. Application à la commande directe d'équipements de lutte contre le feu.
FR7914625A 1978-06-07 1979-06-07 Dispositif de detection d'incendie Withdrawn FR2428289A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53067719A JPS583272B2 (ja) 1978-06-07 1978-06-07 火災感知器

Publications (1)

Publication Number Publication Date
FR2428289A1 true FR2428289A1 (fr) 1980-01-04

Family

ID=13353034

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7914625A Withdrawn FR2428289A1 (fr) 1978-06-07 1979-06-07 Dispositif de detection d'incendie

Country Status (5)

Country Link
US (1) US4300099A (fr)
JP (1) JPS583272B2 (fr)
DE (1) DE2923119A1 (fr)
FR (1) FR2428289A1 (fr)
GB (1) GB2022892B (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57795A (en) * 1980-06-04 1982-01-05 Hitachi Ltd Method of detecting and warning gas leakage
CA1179752A (fr) * 1982-03-09 1984-12-18 Gunter P. Grewe Circuit de surveillance de flamme
FR2541481A1 (fr) * 1983-02-23 1984-08-24 Tomac Zeljko Appareil a indiquer et a signaler l'etat d'installation et de fonctionnement d'objets tels que des machines, des vehicules, des caravanes ou similaires
JPS60126798A (ja) * 1983-12-13 1985-07-06 ニッタン株式会社 環境異常検出装置
JPS60203486A (ja) * 1984-03-28 1985-10-15 Dainippon Toryo Co Ltd 隠し記号等を視認する方法
NL8401173A (nl) * 1984-04-12 1985-11-01 Philips Nv Vlambeveiligingsschakeling.
NO158391C (no) * 1985-02-08 1988-08-31 Flaekt Ab Brannvarslingssystem for oppholdsrom.
JPS62215848A (ja) * 1986-03-18 1987-09-22 Hochiki Corp 感知装置
CH669859A5 (fr) * 1986-06-03 1989-04-14 Cerberus Ag
US6107925A (en) * 1993-06-14 2000-08-22 Edwards Systems Technology, Inc. Method for dynamically adjusting criteria for detecting fire through smoke concentration
EP0877995B1 (fr) * 1996-01-29 2006-05-24 GE Security, Inc. Procede d'adaptation dynamique des criteres de detection d'incendie
AU2959100A (en) * 1998-12-23 2000-07-31 Johns Hopkins University, The Thermal ionization detector
JP2002074568A (ja) * 2000-08-30 2002-03-15 Nittan Co Ltd 防災システム及び端末器
JP2006011540A (ja) * 2004-06-22 2006-01-12 Nittan Co Ltd イオン化式煙感知器
GB2508033B (en) * 2012-11-20 2016-02-17 Sprue Safety Products Ltd Low power detection and alarm
JP6066692B2 (ja) * 2012-11-27 2017-01-25 能美防災株式会社 移動式の煙検知装置を用いた煙の発生位置の特定方法
DE102014019773B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons
DE102014019172B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem
US11439850B2 (en) * 2018-07-20 2022-09-13 Williamsrdm, Inc. Self contained stovetop fire suppressor with alert signal and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2251060A1 (fr) * 1973-11-09 1975-06-06 Nohmi Bosai Kogyo Co Ltd
FR2274982A1 (fr) * 1974-06-14 1976-01-09 Cerberus Ag Installation d'avertissement d'incendie
GB1558471A (en) * 1975-11-24 1980-01-03 Chubb Fire Security Ltd Fire detectors

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995221A (en) * 1975-03-20 1976-11-30 Electronics Corporation Of America Flame responsive system
US4052720A (en) * 1976-03-16 1977-10-04 Mcgregor Howard Norman Dynamic sound controller and method therefor
US4157506A (en) * 1977-12-01 1979-06-05 Combustion Engineering, Inc. Flame detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2251060A1 (fr) * 1973-11-09 1975-06-06 Nohmi Bosai Kogyo Co Ltd
FR2274982A1 (fr) * 1974-06-14 1976-01-09 Cerberus Ag Installation d'avertissement d'incendie
GB1558471A (en) * 1975-11-24 1980-01-03 Chubb Fire Security Ltd Fire detectors

Also Published As

Publication number Publication date
GB2022892B (en) 1982-12-01
GB2022892A (en) 1979-12-19
JPS583272B2 (ja) 1983-01-20
US4300099A (en) 1981-11-10
DE2923119A1 (de) 1979-12-13
JPS54159199A (en) 1979-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse