CH670718A5 - - Google Patents

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Publication number
CH670718A5
CH670718A5 CH1319/87A CH131987A CH670718A5 CH 670718 A5 CH670718 A5 CH 670718A5 CH 1319/87 A CH1319/87 A CH 1319/87A CH 131987 A CH131987 A CH 131987A CH 670718 A5 CH670718 A5 CH 670718A5
Authority
CH
Switzerland
Prior art keywords
light
light emitting
charging
emitting device
capacitor
Prior art date
Application number
CH1319/87A
Other languages
English (en)
French (fr)
Inventor
Ishii Hiromitsu
Ono Takashi
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 CH670718A5 publication Critical patent/CH670718A5/fr

Links

Classifications

    • 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
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G01J1/46—Electric circuits using a capacitor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J1/1626—Arrangements with two photodetectors, the signals of which are compared
    • G01J2001/1636—Arrangements with two photodetectors, the signals of which are compared one detector directly monitoring the source, e.g. also impulse time controlling
    • 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
    • G01N2021/1748—Comparative step being essential in the method
    • G01N2021/1751—Constructive features therefore, e.g. using two measurement cells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's
    • G01N2201/0621—Supply
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/069—Supply of sources
    • G01N2201/0696—Pulsed
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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

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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Measurement Of Current Or Voltage (AREA)
CH1319/87A 1986-04-07 1987-04-06 CH670718A5 (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61079434A JPH0765963B2 (ja) 1986-04-07 1986-04-07 減光式煙感知器

Publications (1)

Publication Number Publication Date
CH670718A5 true CH670718A5 (en:Method) 1989-06-30

Family

ID=13689770

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1319/87A CH670718A5 (en:Method) 1986-04-07 1987-04-06

Country Status (8)

Country Link
US (1) US4838698A (en:Method)
JP (1) JPH0765963B2 (en:Method)
AU (1) AU598527B2 (en:Method)
CH (1) CH670718A5 (en:Method)
DE (1) DE3711022A1 (en:Method)
FI (1) FI871477A7 (en:Method)
FR (1) FR2596862B1 (en:Method)
GB (1) GB2190191B (en:Method)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629983A1 (en) * 1993-06-02 1994-12-21 David Appleby Obscuration type smoke detector
DE4320861A1 (de) * 1993-06-23 1995-01-05 Hekatron Gmbh Schaltungsanordnung für einen optischen Melder zur Umweltüberwachung und Anzeige eines Störmediums
ES2163069T3 (es) * 1997-06-16 2002-01-16 Siemens Building Tech Ag Detector de humo optico segun el principio de extincion.
DE19749891B4 (de) * 1997-11-12 2004-08-26 Jürgen Dittrich Verfahren zur Messung der Konzentration eines Gases in einem Gasgemisch, insbesondere in Luft, und Vorrichtung zur Durchführung des Verfahrens
CN109979151B (zh) * 2019-03-28 2021-03-16 赛特威尔电子股份有限公司 一种烟雾报警方法、装置、烟雾报警设备及存储介质
CN214895849U (zh) * 2021-01-28 2021-11-26 贝克曼库尔特生物科技（苏州）有限公司 气泡检测装置和样本处理仪

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528749A (en) * 1966-12-09 1970-09-15 Itek Corp Apparatus for measuring optical density
US3872315A (en) * 1973-12-21 1975-03-18 Babcock & Wilcox Co Radiation sensitive fluid analyzer
US3954342A (en) * 1974-03-28 1976-05-04 Jan Boeke Optical device for monitoring clarity of a fluid
US3992113A (en) * 1974-11-20 1976-11-16 Bruno Egli Photometer circuitry for the digital indication of the light absorption of a test sample
SE7604502L (sv) * 1976-04-15 1977-10-16 Ericsson Telefon Ab L M Optisk branddetektor
JPS5578397A (en) * 1978-12-08 1980-06-12 Matsushita Electric Industrial Co Ltd Smoke sensor
JPS598876B2 (ja) * 1980-05-22 1984-02-28 ニッタン株式会社 透過光式煙感知器
EP0054680B1 (de) * 1980-12-18 1987-01-07 Cerberus Ag Rauchmelder nach dem Strahlungs-Extinktions-Prinzip
US4544273A (en) * 1983-07-29 1985-10-01 Particulate Instruments Smoke opacity meter
JPS6033035A (ja) * 1983-08-02 1985-02-20 Hochiki Corp 減光式煙感知器
JPS60169740A (ja) * 1984-02-14 1985-09-03 Nippon Denso Co Ltd 煙検出装置
JPS60186994A (ja) * 1984-03-05 1985-09-24 ホーチキ株式会社 火災感知器
US4621204A (en) * 1984-07-26 1986-11-04 Miles Laboratories, Inc. Sensor integrator system
FI854809A7 (fi) * 1984-12-18 1986-06-19 Hochiki Co Branddetektor som baserar sig pao minskat ljus.

Also Published As

Publication number Publication date
AU7100687A (en) 1987-10-08
JPH0765963B2 (ja) 1995-07-19
JPS62235547A (ja) 1987-10-15
FR2596862B1 (fr) 1991-02-08
FR2596862A1 (fr) 1987-10-09
FI871477A0 (fi) 1987-04-03
GB2190191A (en) 1987-11-11
AU598527B2 (en) 1990-06-28
FI871477A7 (fi) 1987-10-08
GB8708258D0 (en) 1987-05-13
DE3711022A1 (de) 1987-10-08
US4838698A (en) 1989-06-13
GB2190191B (en) 1989-11-29

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PL Patent ceased