JPS551574A - Fine particle detector - Google Patents

Fine particle detector

Info

Publication number
JPS551574A
JPS551574A JP7505778A JP7505778A JPS551574A JP S551574 A JPS551574 A JP S551574A JP 7505778 A JP7505778 A JP 7505778A JP 7505778 A JP7505778 A JP 7505778A JP S551574 A JPS551574 A JP S551574A
Authority
JP
Japan
Prior art keywords
light
optical fiber
case
optical transmission
smoke
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
JP7505778A
Other languages
Japanese (ja)
Inventor
Riyouichi Yamamoto
Shoichi Ishihara
Shigeru Hayakawa
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 Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7505778A priority Critical patent/JPS551574A/en
Publication of JPS551574A publication Critical patent/JPS551574A/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
    • G01N21/47—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

Abstract

PURPOSE:To introduce fine particles near the end of an optical transmission line and prevent the entry of noise light and coarse objects from the outside by providing an optical transmission holding case near the end of the optical transmission line of a photoelectric type fine particle detector. CONSTITUTION:An optical fiber 22 leads the light 21 from a light source into an optical transmission line holding case 26 and an optical fiber 24 receives the light radiated from the end of the optical fiber 22 and is fixed together with the optical fiber 22 to the case 26. When smoke 25 enters the case 26, the transmitted light 23 having been attenuated by the smoke is led from the end of the optical fiber 24 into the fiber and reaches a photo detector, by which the existence of the smoke is detected. Whereupon, screen-form outlet and inlet 28 are provided to the case 26, by which the entry of coarse objects may be prevented. In addition, light shield plates 27 are provided near the outlet and inlet 28, and therefore external light which becomes noise may be prevented.
JP7505778A 1978-06-20 1978-06-20 Fine particle detector Pending JPS551574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7505778A JPS551574A (en) 1978-06-20 1978-06-20 Fine particle detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7505778A JPS551574A (en) 1978-06-20 1978-06-20 Fine particle detector

Publications (1)

Publication Number Publication Date
JPS551574A true JPS551574A (en) 1980-01-08

Family

ID=13565185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7505778A Pending JPS551574A (en) 1978-06-20 1978-06-20 Fine particle detector

Country Status (1)

Country Link
JP (1) JPS551574A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297578A (en) * 1980-01-09 1981-10-27 Carter William R Airborne dust monitor
US4304492A (en) * 1979-12-07 1981-12-08 Standard Havens, Inc. Method and apparatus for detecting leaks in filter bags of a baghouse
JPS57199943A (en) * 1981-06-03 1982-12-08 Hitachi Ltd Measuring device for wetness of steam
JPS5880543A (en) * 1981-11-10 1983-05-14 Sumitomo Electric Ind Ltd Transmission type photosensor
JPS593353U (en) * 1982-06-29 1984-01-10 富士通株式会社 Infrared gas detection device
JPS59147240A (en) * 1983-02-14 1984-08-23 Hitachi Condenser Co Ltd Evaporation quantity monitor
JPS62192242U (en) * 1986-05-27 1987-12-07
US5334240A (en) * 1990-06-04 1994-08-02 Macdermid, Incorporated Aqueous acidic tin-lead immersion plating bath containing weak acid and weak base
CN103983601A (en) * 2014-06-04 2014-08-13 江南大学 Infrared optical fiber oil fume concentration sensor
WO2020009022A1 (en) * 2018-07-06 2020-01-09 味の素株式会社 Sensor cover, sensor device provided with same, liquid property measuring method and method for producing metabolite in aeration culture

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304492A (en) * 1979-12-07 1981-12-08 Standard Havens, Inc. Method and apparatus for detecting leaks in filter bags of a baghouse
US4297578A (en) * 1980-01-09 1981-10-27 Carter William R Airborne dust monitor
JPH0256623B2 (en) * 1981-06-03 1990-11-30 Hitachi Ltd
JPS57199943A (en) * 1981-06-03 1982-12-08 Hitachi Ltd Measuring device for wetness of steam
JPS5880543A (en) * 1981-11-10 1983-05-14 Sumitomo Electric Ind Ltd Transmission type photosensor
JPH0142369B2 (en) * 1981-11-10 1989-09-12 Sumitomo Electric Industries
JPS593353U (en) * 1982-06-29 1984-01-10 富士通株式会社 Infrared gas detection device
JPS59147240A (en) * 1983-02-14 1984-08-23 Hitachi Condenser Co Ltd Evaporation quantity monitor
JPS62192242U (en) * 1986-05-27 1987-12-07
JPH053971Y2 (en) * 1986-05-27 1993-01-29
US5334240A (en) * 1990-06-04 1994-08-02 Macdermid, Incorporated Aqueous acidic tin-lead immersion plating bath containing weak acid and weak base
CN103983601A (en) * 2014-06-04 2014-08-13 江南大学 Infrared optical fiber oil fume concentration sensor
WO2020009022A1 (en) * 2018-07-06 2020-01-09 味の素株式会社 Sensor cover, sensor device provided with same, liquid property measuring method and method for producing metabolite in aeration culture

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