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JPS5299874A - Photoelectric smoke sensor - Google Patents

Photoelectric smoke sensor

Info

Publication number
JPS5299874A
JPS5299874A JP1631176A JP1631176A JPS5299874A JP S5299874 A JPS5299874 A JP S5299874A JP 1631176 A JP1631176 A JP 1631176A JP 1631176 A JP1631176 A JP 1631176A JP S5299874 A JPS5299874 A JP S5299874A
Authority
JP
Japan
Prior art keywords
smoke sensor
photoelectric smoke
black
improved
photoelectric
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
JP1631176A
Other languages
Japanese (ja)
Other versions
JPS5841458B2 (en
Inventor
Shigeru Matsumoto
Kazunari Morisue
Kuniharu Tatezuki
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
Priority to JP1631176A priority Critical patent/JPS5841458B2/en
Publication of JPS5299874A publication Critical patent/JPS5299874A/en
Publication of JPS5841458B2 publication Critical patent/JPS5841458B2/en
Expired legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:To provide a photoelectric smoke sensor, in which two light receiving elements are disposed such that they form different scattering angles to luminous flux of one single luminous element, whereby ratio B/W of light outputs to black and white smokes is greatly improved and sensitivity to black smoke is also improved.
JP1631176A 1976-02-16 1976-02-16 photoelectric smoke detector Expired JPS5841458B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1631176A JPS5841458B2 (en) 1976-02-16 1976-02-16 photoelectric smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1631176A JPS5841458B2 (en) 1976-02-16 1976-02-16 photoelectric smoke detector

Publications (2)

Publication Number Publication Date
JPS5299874A true JPS5299874A (en) 1977-08-22
JPS5841458B2 JPS5841458B2 (en) 1983-09-12

Family

ID=11912968

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1631176A Expired JPS5841458B2 (en) 1976-02-16 1976-02-16 photoelectric smoke detector

Country Status (1)

Country Link
JP (1) JPS5841458B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076338A1 (en) * 1981-10-05 1983-04-13 Gamewell Corporation Broad-spectrum particle detector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63141620A (en) * 1986-12-03 1988-06-14 Kanji Hayakawa Dehydrating device for refrigerator using freon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076338A1 (en) * 1981-10-05 1983-04-13 Gamewell Corporation Broad-spectrum particle detector

Also Published As

Publication number Publication date
JPS5841458B2 (en) 1983-09-12

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