WO2004104959A3 - Smoke detector - Google Patents

Smoke detector Download PDF

Info

Publication number
WO2004104959A3
WO2004104959A3 PCT/GB2004/002213 GB2004002213W WO2004104959A3 WO 2004104959 A3 WO2004104959 A3 WO 2004104959A3 GB 2004002213 W GB2004002213 W GB 2004002213W WO 2004104959 A3 WO2004104959 A3 WO 2004104959A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
smoke detector
smoke
smd led
light beam
Prior art date
Application number
PCT/GB2004/002213
Other languages
French (fr)
Other versions
WO2004104959A2 (en
Inventor
Roger Barrett
Original Assignee
Apollo Fire Detectors Ltd
Roger Barrett
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
Priority claimed from GB0311966A external-priority patent/GB2401936A/en
Priority claimed from GB0318006A external-priority patent/GB2404731B/en
Application filed by Apollo Fire Detectors Ltd, Roger Barrett filed Critical Apollo Fire Detectors Ltd
Publication of WO2004104959A2 publication Critical patent/WO2004104959A2/en
Publication of WO2004104959A3 publication Critical patent/WO2004104959A3/en

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
    • 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
    • G08B17/113—Constructional details

Abstract

A smoke detector has a light sensor positioned such that a light-receiving surface of the sensor extends generally parallel to a light beam generated by a SMD LED light source of the smoke detector. The light sensor has an enclosure surrounding the light-receiving surface, which enclosure has an aperture in a side facing the light beam. The front and rear edges of the aperture (with reference to the direction of the light beam), are positioned to create a balance of sensitivity to forward-scattered pale-coloured smoke and backward-scattered dark-coloured smoke. The use of a SMD LED in. association with a proximate means for redirecting and refocusing light allows for construction of a compact low-profile smoke detector. The SMD LED may be a laser diode.
PCT/GB2004/002213 2003-05-23 2004-05-24 Smoke detector WO2004104959A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0311966.6 2003-05-23
GB0311966A GB2401936A (en) 2003-05-23 2003-05-23 Light sensor for smoke detector
GB0318006.4 2003-07-31
GB0318006A GB2404731B (en) 2003-07-31 2003-07-31 Smoke detector with compact light source

Publications (2)

Publication Number Publication Date
WO2004104959A2 WO2004104959A2 (en) 2004-12-02
WO2004104959A3 true WO2004104959A3 (en) 2005-03-24

Family

ID=33477768

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/002213 WO2004104959A2 (en) 2003-05-23 2004-05-24 Smoke detector

Country Status (1)

Country Link
WO (1) WO2004104959A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7046897B2 (en) 2018-11-30 2022-04-04 シャープ株式会社 Particle detection sensor and particle detection device
JP7440390B2 (en) 2020-09-30 2024-02-28 シャープセミコンダクターイノベーション株式会社 Particle detection sensor and particle detection device

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20060676A1 (en) * 2006-09-22 2008-03-23 Elkron Spa SMOKE DETECTOR
WO2008140816A1 (en) * 2007-05-12 2008-11-20 Unger Roger L Compact, low cost particle sensor
DE102007045018B4 (en) 2007-09-20 2011-02-17 Perkinelmer Optoelectronics Gmbh & Co.Kg Radiation guide device for a detector, scattered radiation detector
CN101650775B (en) * 2008-08-15 2011-09-14 深圳市飞瑞斯科技有限公司 Uniform light source-based human face recognition device
FR2964743B1 (en) * 2010-09-14 2015-06-26 Finsecur SMOKE DETECTION CIRCUIT, SMOKE DETECTOR COMPRISING IT, AND ALARM DEVICE COMPRISING SAME.
FR3027438B1 (en) * 2014-10-16 2016-11-04 Soc D'etude Et De Fabrication Ind LINEAR SMOKE DETECTOR.
EP3029647B1 (en) 2014-12-04 2017-05-31 Siemens Schweiz AG Open scattered light smoke detector, particularly with a sidelooker LED
CN106778600A (en) * 2016-12-13 2017-05-31 天津灵隆科技有限公司 Face identification device based on uniform source of light
EP3270362B1 (en) 2017-02-07 2019-01-02 Siemens Schweiz AG Fire alarm with a measurement chamber and a switch holder for joint assembly of a fire sensor of the measuring chamber and at least one further sensor for detecting a measured variable in the environment outside the fire detector
JP2018181191A (en) * 2017-04-20 2018-11-15 株式会社村田製作所 Optical sensor for smoke sensor
GB2586283B (en) * 2019-08-16 2022-01-26 Apollo Fire Detectors Ltd Optical smoke detector
WO2023233562A1 (en) * 2022-06-01 2023-12-07 三菱電機株式会社 Fine particle measurement sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451931A (en) * 1992-09-14 1995-09-19 Cerberus Ag Optical smoke detector
US5719557A (en) * 1994-05-19 1998-02-17 Digital Security Controls Ltd. Photoelectric smoke detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451931A (en) * 1992-09-14 1995-09-19 Cerberus Ag Optical smoke detector
US5719557A (en) * 1994-05-19 1998-02-17 Digital Security Controls Ltd. Photoelectric smoke detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7046897B2 (en) 2018-11-30 2022-04-04 シャープ株式会社 Particle detection sensor and particle detection device
JP7440390B2 (en) 2020-09-30 2024-02-28 シャープセミコンダクターイノベーション株式会社 Particle detection sensor and particle detection device

Also Published As

Publication number Publication date
WO2004104959A2 (en) 2004-12-02

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