SE8001492L - Rokdetektor - Google Patents
RokdetektorInfo
- Publication number
- SE8001492L SE8001492L SE8001492A SE8001492A SE8001492L SE 8001492 L SE8001492 L SE 8001492L SE 8001492 A SE8001492 A SE 8001492A SE 8001492 A SE8001492 A SE 8001492A SE 8001492 L SE8001492 L SE 8001492L
- Authority
- SE
- Sweden
- Prior art keywords
- phototransistor
- smoke detector
- ambient light
- light level
- bias
- Prior art date
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
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
Landscapes
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/016,697 US4225791A (en) | 1979-03-01 | 1979-03-01 | Optical smoke detector circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
SE8001492L true SE8001492L (sv) | 1980-09-02 |
Family
ID=21778464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8001492A SE8001492L (sv) | 1979-03-01 | 1980-02-26 | Rokdetektor |
Country Status (8)
Country | Link |
---|---|
US (1) | US4225791A (sv) |
JP (1) | JPS55117943A (sv) |
CA (1) | CA1109540A (sv) |
DE (1) | DE3007699A1 (sv) |
FR (1) | FR2450453A1 (sv) |
GB (1) | GB2044923B (sv) |
IT (1) | IT1126953B (sv) |
SE (1) | SE8001492L (sv) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4680462A (en) * | 1984-12-11 | 1987-07-14 | Baxter Travenol Laboratories, Inc. | Fluid drop detection system |
FR2619919B1 (fr) * | 1987-09-01 | 1990-01-19 | Jaeger | Dispositif de mesure de visibilite dans un milieu turbide |
US5354983A (en) * | 1990-04-10 | 1994-10-11 | Auto-Sense, Limited | Object detector utilizing a threshold detection distance and suppression means for detecting the presence of a motor vehicle |
GB2274333B (en) * | 1993-01-07 | 1996-12-11 | Hochiki Co | Smoke detecting apparatus capable of detecting both smoke and fine particles |
US6501810B1 (en) | 1998-10-13 | 2002-12-31 | Agere Systems Inc. | Fast frame synchronization |
US5546074A (en) * | 1993-08-19 | 1996-08-13 | Sentrol, Inc. | Smoke detector system with self-diagnostic capabilities and replaceable smoke intake canopy |
US5471981A (en) * | 1993-12-30 | 1995-12-05 | Diasense, Inc. | Method and apparatus for converting a modulated optical signal to an electrical signal with correction for modulation jitter |
DE19646748C2 (de) | 1996-11-01 | 2003-03-20 | Nanotron Ges Fuer Mikrotechnik | Sicherungssystem |
DE19902319B4 (de) * | 1999-01-21 | 2011-06-30 | Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 | Streulichtbrandmelder |
ES2254552T3 (es) * | 2002-05-08 | 2006-06-16 | Hekatron Technik Gmbh | Detector de incendio y procedimiento de funcionamiento del mismo. |
US7068177B2 (en) * | 2002-09-19 | 2006-06-27 | Honeywell International, Inc. | Multi-sensor device and methods for fire detection |
DE102004004098B3 (de) * | 2004-01-27 | 2005-09-01 | Wagner Alarm- Und Sicherungssysteme Gmbh | Verfahren zur Auswertung eines Streulichtsignals und Streulichtdetektor zur Durchführung des Verfahrens |
US8552355B2 (en) * | 2008-04-24 | 2013-10-08 | Panasonic Corporation | Smoke sensor including a current to voltage circuit having a low frequency correction means to produce a correction current |
CN103684297A (zh) * | 2013-12-03 | 2014-03-26 | 成都国科海博信息技术股份有限公司 | 用于探测器的电放大电路 |
CN111263958B (zh) | 2017-10-30 | 2022-05-27 | 开利公司 | 检测器装置中的补偿器 |
CN113470300B (zh) * | 2021-07-06 | 2022-12-20 | 无锡商业职业技术学院 | 一种用于高精度烟雾探测器的光电控制系统 |
CN115083097A (zh) * | 2022-06-09 | 2022-09-20 | 南京英锐创电子科技有限公司 | 模拟前端电路和烟雾报警器 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3185975A (en) * | 1962-06-18 | 1965-05-25 | Honeywell Inc | Photoelectric smoke detector |
CH558577A (de) * | 1973-09-25 | 1975-01-31 | Cerberus Ag | Verfahren zur flammen-detektion und vorrichtung zur durchfuehrung dieses verfahrens. |
US3946241A (en) * | 1973-11-26 | 1976-03-23 | Pyrotector, Incorporated | Light detector with pulsed light source and synchronous data gating |
US4063227A (en) * | 1975-09-08 | 1977-12-13 | Cega, Inc. | Smoke detector |
US4087799A (en) * | 1976-07-08 | 1978-05-02 | Conrac Corporation | Particulate products of combustion detector employing solid state elements |
US4112310A (en) * | 1977-05-19 | 1978-09-05 | Chloride, Incorporated | Smoke detector with photo-responsive means for increasing the sensitivity during darkness |
-
1979
- 1979-03-01 US US06/016,697 patent/US4225791A/en not_active Expired - Lifetime
- 1979-12-20 CA CA342,396A patent/CA1109540A/en not_active Expired
-
1980
- 1980-02-14 GB GB8004945A patent/GB2044923B/en not_active Expired
- 1980-02-21 IT IT47965/80A patent/IT1126953B/it active
- 1980-02-26 SE SE8001492A patent/SE8001492L/sv not_active Application Discontinuation
- 1980-02-28 FR FR8004484A patent/FR2450453A1/fr not_active Withdrawn
- 1980-02-29 JP JP2420880A patent/JPS55117943A/ja active Pending
- 1980-02-29 DE DE19803007699 patent/DE3007699A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE3007699A1 (de) | 1980-09-04 |
US4225791A (en) | 1980-09-30 |
IT8047965A0 (it) | 1980-02-21 |
CA1109540A (en) | 1981-09-22 |
IT1126953B (it) | 1986-05-21 |
GB2044923B (en) | 1983-05-11 |
FR2450453A1 (fr) | 1980-09-26 |
GB2044923A (en) | 1980-10-22 |
JPS55117943A (en) | 1980-09-10 |
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Legal Events
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---|---|---|---|
NAV | Patent application has lapsed |
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