SE452812B - Fotoelektrisk rokdetektor - Google Patents

Fotoelektrisk rokdetektor

Info

Publication number
SE452812B
SE452812B SE8201696A SE8201696A SE452812B SE 452812 B SE452812 B SE 452812B SE 8201696 A SE8201696 A SE 8201696A SE 8201696 A SE8201696 A SE 8201696A SE 452812 B SE452812 B SE 452812B
Authority
SE
Sweden
Prior art keywords
circuit
comparator
pin
voltage
photodiode
Prior art date
Application number
SE8201696A
Other languages
English (en)
Swedish (sv)
Other versions
SE8201696L (sv
Inventor
H Honma
Original Assignee
Hochiki Co
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 Co filed Critical Hochiki Co
Publication of SE8201696L publication Critical patent/SE8201696L/
Publication of SE452812B publication Critical patent/SE452812B/sv

Links

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
    • 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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
SE8201696A 1981-03-18 1982-03-17 Fotoelektrisk rokdetektor SE452812B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56038903A JPS6014398B2 (ja) 1981-03-18 1981-03-18 光電式煙感知器

Publications (2)

Publication Number Publication Date
SE8201696L SE8201696L (sv) 1982-09-19
SE452812B true SE452812B (sv) 1987-12-14

Family

ID=12538147

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8201696A SE452812B (sv) 1981-03-18 1982-03-17 Fotoelektrisk rokdetektor

Country Status (7)

Country Link
US (1) US4481506A (de)
JP (1) JPS6014398B2 (de)
AU (1) AU538594B2 (de)
CH (1) CH655192A5 (de)
DE (1) DE3209994A1 (de)
GB (1) GB2097917B (de)
SE (1) SE452812B (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60230038A (ja) * 1984-04-27 1985-11-15 Hochiki Corp 光電式アナログ煙感知器の受光回路
JPS60187315A (ja) * 1984-03-06 1985-09-24 Mitsubishi Heavy Ind Ltd 集じん装置
US4626695A (en) * 1984-07-16 1986-12-02 Pittway Corporation Photoelectric combustion products detector with low power consumption and improved noise immunity
JPS6157836A (ja) * 1984-08-29 1986-03-24 Hochiki Corp 光電式煙感知器
US4637420A (en) * 1985-12-16 1987-01-20 United Technologies Corporation Metering valve
JPH02112096A (ja) * 1988-10-21 1990-04-24 Matsushita Electric Works Ltd Ｉｃ化された感知器
GB9014015D0 (en) * 1990-06-23 1990-08-15 Dennis Peter N J Improvements in or relating to smoke detectors
CN1071291A (zh) * 1991-09-30 1993-04-21 莫托罗拉公司 带有小型虚像显示器的便携式通讯接收机
US5691700A (en) * 1994-09-15 1997-11-25 United Technologies Corporation Apparatus and method using non-contact light sensing with selective field of view, low input impedance, current-mode amplification and/or adjustable switching level
EP0733894B1 (de) * 1995-03-24 2003-05-07 Nohmi Bosai Ltd. Sensor zur Feststellung feiner Teilchen wie Rauch
US6060719A (en) * 1997-06-24 2000-05-09 Gas Research Institute Fail safe gas furnace optical flame sensor using a transconductance amplifier and low photodiode current
CN1116636C (zh) * 1998-06-12 2003-07-30 致伸实业股份有限公司 使用斜率检知方式之数字检知器
US6329922B1 (en) * 1999-07-27 2001-12-11 Hochiki Kabushiki Kaisha Fire detector and noise de-influence method
WO2010102646A1 (en) * 2009-03-10 2010-09-16 Ab Skf Power supply
DE102011018450B4 (de) * 2011-04-21 2017-08-31 Infineon Technologies Ag Halbleiterbauelement mit durchgeschalteten parasitären Thyristor bei einem Lichtangriff und Halbleiterbauelement mit Alarmschaltung für einen Lichtangriff
DE102020129122A1 (de) 2020-11-05 2022-05-05 Pepperl+Fuchs Se Optischer Sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL45331A (en) * 1973-11-26 1977-12-30 Chloride Batterijen Bv Photoelectric smoke detector
ZA763862B (en) * 1975-07-21 1977-05-25 Gen Signal Corp Photodiode smoke detector
US4260984A (en) * 1979-03-17 1981-04-07 Hochiki Corporation Count discriminating fire detector

Also Published As

Publication number Publication date
DE3209994A1 (de) 1982-10-07
AU538594B2 (en) 1984-08-23
US4481506A (en) 1984-11-06
GB2097917B (en) 1984-11-14
GB2097917A (en) 1982-11-10
CH655192A5 (fr) 1986-03-27
DE3209994C2 (de) 1989-08-10
JPS57153397A (en) 1982-09-21
JPS6014398B2 (ja) 1985-04-12
AU8152282A (en) 1982-09-23
SE8201696L (sv) 1982-09-19

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