FR2369746A1 - Detecteur photoelectrique de fumee - Google Patents

Detecteur photoelectrique de fumee

Info

Publication number
FR2369746A1
FR2369746A1 FR7732152A FR7732152A FR2369746A1 FR 2369746 A1 FR2369746 A1 FR 2369746A1 FR 7732152 A FR7732152 A FR 7732152A FR 7732152 A FR7732152 A FR 7732152A FR 2369746 A1 FR2369746 A1 FR 2369746A1
Authority
FR
France
Prior art keywords
detector
light beam
smoke
pulsed light
filter circuit
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
FR7732152A
Other languages
English (en)
Other versions
FR2369746B1 (fr
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of FR2369746A1 publication Critical patent/FR2369746A1/fr
Application granted granted Critical
Publication of FR2369746B1 publication Critical patent/FR2369746B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
    • 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

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Burglar Alarm Systems (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention se rapporte à un circuit de traitement de signal de détection pour des détecteurs photoélectriques de fumée, ce circuit étant stable par rapport à du bruit extérieur. Le bloc récepteur de lumière du détecteur reçoit de la lumière émise de façon intermittente par un bloc émetteur de lumière et dispersée par les particules de fumée, et comporte un élément récepteur de lumière, un condensateur charge en fonction de l'intensité de la lumière intermittente dispersée reçue par l'élément et ayant une valeur supérieure à un niveau prédéterminé, et un circuit de sortie produisant un signal de sortie à un moyen opérateur subséquent uniquement lorsque la charge du condensateur atteint un niveau prédéterminé. De façon optimale, la valeur prédéterminée de la charge du condensateur est atteinte lorsque l'on reçoit continuellement au moins deux ou plusieurs rayons lumineux intermittents après dispersion.
FR7732152A 1976-10-26 1977-10-25 Detecteur photoelectrique de fumee Granted FR2369746A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12893876A JPS5354000A (en) 1976-10-26 1976-10-26 Detection signal processing circuit of photoelectric type smoke detectors

Publications (2)

Publication Number Publication Date
FR2369746A1 true FR2369746A1 (fr) 1978-05-26
FR2369746B1 FR2369746B1 (fr) 1982-11-05

Family

ID=14997107

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7732152A Granted FR2369746A1 (fr) 1976-10-26 1977-10-25 Detecteur photoelectrique de fumee

Country Status (4)

Country Link
JP (1) JPS5354000A (fr)
DE (1) DE2747692B2 (fr)
FR (1) FR2369746A1 (fr)
SE (1) SE432161B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0971329A1 (fr) * 1998-07-10 2000-01-12 Siemens Building Technologies AG Dispositif permettant de vérifier des détecteurs de fumée du type à diffusion optique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544690A (en) * 1978-09-26 1980-03-29 Matsushita Electric Works Ltd Signal processing circuit
US4260984A (en) * 1979-03-17 1981-04-07 Hochiki Corporation Count discriminating fire detector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254024A1 (fr) * 1973-11-26 1975-07-04 Pyrotector Inc
US3946241A (en) * 1973-11-26 1976-03-23 Pyrotector, Incorporated Light detector with pulsed light source and synchronous data gating

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5247700B2 (fr) * 1972-03-06 1977-12-05
US3917956A (en) * 1974-03-08 1975-11-04 Pyrotector Inc Smoke detector
JPS518983A (ja) * 1974-07-11 1976-01-24 Omron Tateisi Electronics Co Funikikenchisochi
CH576175A5 (fr) * 1974-12-19 1976-05-31 Cerberus Ag

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254024A1 (fr) * 1973-11-26 1975-07-04 Pyrotector Inc
US3946241A (en) * 1973-11-26 1976-03-23 Pyrotector, Incorporated Light detector with pulsed light source and synchronous data gating

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0971329A1 (fr) * 1998-07-10 2000-01-12 Siemens Building Technologies AG Dispositif permettant de vérifier des détecteurs de fumée du type à diffusion optique

Also Published As

Publication number Publication date
FR2369746B1 (fr) 1982-11-05
DE2747692A1 (de) 1978-04-27
DE2747692C3 (fr) 1988-09-08
SE432161B (sv) 1984-03-19
JPS6130320B2 (fr) 1986-07-12
JPS5354000A (en) 1978-05-16
DE2747692B2 (de) 1980-02-28
SE7711904L (sv) 1978-04-27

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Legal Events

Date Code Title Description
ST Notification of lapse