JPS5224570A - Smoke sensor - Google Patents

Smoke sensor

Info

Publication number
JPS5224570A
JPS5224570A JP10014375A JP10014375A JPS5224570A JP S5224570 A JPS5224570 A JP S5224570A JP 10014375 A JP10014375 A JP 10014375A JP 10014375 A JP10014375 A JP 10014375A JP S5224570 A JPS5224570 A JP S5224570A
Authority
JP
Japan
Prior art keywords
smoke sensor
change
time
contamination
correcting
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.)
Pending
Application number
JP10014375A
Other languages
Japanese (ja)
Inventor
Shunsaku Nakauchi
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.)
KOKUSAI GIJIYUTSU KAIHATSU KK
Kokusai Gijutsu Kaihatsu Co Ltd
Original Assignee
KOKUSAI GIJIYUTSU KAIHATSU KK
Kokusai Gijutsu Kaihatsu Co 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 KOKUSAI GIJIYUTSU KAIHATSU KK, Kokusai Gijutsu Kaihatsu Co Ltd filed Critical KOKUSAI GIJIYUTSU KAIHATSU KK
Priority to JP10014375A priority Critical patent/JPS5224570A/en
Publication of JPS5224570A publication Critical patent/JPS5224570A/en
Pending 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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (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)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:A smoke sensor which does not require maintenance for a long period of time by correcting the effect of change in the quantity of light owing to change of light source with time or contamination.
JP10014375A 1975-08-20 1975-08-20 Smoke sensor Pending JPS5224570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10014375A JPS5224570A (en) 1975-08-20 1975-08-20 Smoke sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10014375A JPS5224570A (en) 1975-08-20 1975-08-20 Smoke sensor

Publications (1)

Publication Number Publication Date
JPS5224570A true JPS5224570A (en) 1977-02-24

Family

ID=14266077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10014375A Pending JPS5224570A (en) 1975-08-20 1975-08-20 Smoke sensor

Country Status (1)

Country Link
JP (1) JPS5224570A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53144388A (en) * 1977-05-23 1978-12-15 Hochiki Co Depreciation type detector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923685A (en) * 1972-06-23 1974-03-02
JPS4958884A (en) * 1972-10-03 1974-06-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923685A (en) * 1972-06-23 1974-03-02
JPS4958884A (en) * 1972-10-03 1974-06-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53144388A (en) * 1977-05-23 1978-12-15 Hochiki Co Depreciation type detector
JPS5829558B2 (en) * 1977-05-23 1983-06-23 ホーチキ株式会社 dimming sensor

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