JPS54123997A - Remote measuring method of atmospheric components - Google Patents

Remote measuring method of atmospheric components

Info

Publication number
JPS54123997A
JPS54123997A JP3131878A JP3131878A JPS54123997A JP S54123997 A JPS54123997 A JP S54123997A JP 3131878 A JP3131878 A JP 3131878A JP 3131878 A JP3131878 A JP 3131878A JP S54123997 A JPS54123997 A JP S54123997A
Authority
JP
Japan
Prior art keywords
laser light
concentrations
laser
subjected
points
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
JP3131878A
Other languages
Japanese (ja)
Inventor
Toru Taharu
Katsuyoshi Ito
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP3131878A priority Critical patent/JPS54123997A/en
Publication of JPS54123997A publication Critical patent/JPS54123997A/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
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

PURPOSE:To make possible measurement of distant distributions of concentrations and achieve the reduction in size of the apparatus by applying frequency modulation to the continuous oscillation laser of relatively small outputs. CONSTITUTION:The output of a CW laser oscillator 1 is subjected to photo frequency modulation 2, is radiated into the atmoshphere from a transmission telescope 4 and the laser light scattered by the aerosols existing at the points A, B, etc. are collected by a receiving telescope 6, are subjected to heterodyne detection 7 and amplification 8, thence they are supplied to a mixer 10 whereby they are mxed with the output of a local oscillator 9 which is repeatedly swept with a specified time delay with respect to the transmission laser light, then through a BPF 13, sequring detector 14, the signal corresponding to the intensity of the receiving laser light is obtainable as a function of distances. By A/D converting 15 this signal, sample holding 16 performing specified operation 17, the concentration between the points A and B is obtained. Further the distance distribution of the concentrations is obtained by sequentially deviating the timings of sample holding and is recorded 18.
JP3131878A 1978-03-17 1978-03-17 Remote measuring method of atmospheric components Pending JPS54123997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3131878A JPS54123997A (en) 1978-03-17 1978-03-17 Remote measuring method of atmospheric components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3131878A JPS54123997A (en) 1978-03-17 1978-03-17 Remote measuring method of atmospheric components

Publications (1)

Publication Number Publication Date
JPS54123997A true JPS54123997A (en) 1979-09-26

Family

ID=12327920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3131878A Pending JPS54123997A (en) 1978-03-17 1978-03-17 Remote measuring method of atmospheric components

Country Status (1)

Country Link
JP (1) JPS54123997A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298235A (en) * 1985-10-25 1987-05-07 Tokyo Gas Co Ltd Gas distribution measurement method
WO2010055715A1 (en) * 2008-11-14 2010-05-20 株式会社Ihi Apparatus for determining concentration of gaseous component
US8395771B2 (en) 2008-11-14 2013-03-12 Ihi Corporation Apparatus and method for determining concentration of gaseous component

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6298235A (en) * 1985-10-25 1987-05-07 Tokyo Gas Co Ltd Gas distribution measurement method
WO2010055715A1 (en) * 2008-11-14 2010-05-20 株式会社Ihi Apparatus for determining concentration of gaseous component
JP2010117303A (en) * 2008-11-14 2010-05-27 Ihi Corp Apparatus for measuring concentration of gas component
US8395771B2 (en) 2008-11-14 2013-03-12 Ihi Corporation Apparatus and method for determining concentration of gaseous component

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