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    • 8. 发明专利
    • Apparatus and method for determining concentration of gaseous component
    • AU2009315122A1
    • 2010-05-20
    • AU2009315122
    • 2009-08-03
    • IHI CORP
    • IZAWA JUNHAMANO YASUNORIKUBOTA NOBUHIKO
    • G01N21/49
    • A sufficiently large light detection value can be obtained to determine a concentration of a target component, in a desired section, without using a laser emitter of a high laser intensity or a large light collector. By changing an orientation of a laser emitter 3 about a horizontal axis or a height of the laser emitter 3, a laser irradiation position on a ground or water surface 5 is switched between a first irradiation position 5a and a second irradiation position 5b. A photodetector 9 detects first scattered light resulting from scattering of first laser beam at the first irradiation position 5a, second scattered light resulting from scattering of second laser beam at the first irradiation position 5a, third scattered light resulting from scattering of the first laser beam at the second irradiation position 5b, and fourth scattered light resulting from scattering of the second laser beam at the second irradiation position 5b. A concentration calculator 11 calculates a concentration of a target component between the first irradiation position 5a and the second irradiation position 5b, based on detection values of the first, second, third, and fourth scattered light obtained by the photodetector 9.
    • 9. 发明专利
    • APPARATUS AND METHOD FOR DETERMINING CONCENTRATION OF GASEOUS COMPONENT
    • MY179062A
    • 2020-10-27
    • MYPI2011002168
    • 2009-08-03
    • IHI CORP
    • IZAWA JUNHAMANO YASUNORIKUBOTA NOBUHIKO
    • A sufficiently large light detection value can be obtained to determine a concentration of a target component in a desired section, without using a laser emitter of a high laser intensity or a large light collector. By changing an orientation of a laser emitter (3) about a horizontal axis or a height of the laser emitter (3), a laser irradiation position on a ground or water surface (5) is switched between a first irradiation position (5a) and a second irradiation position (5b). A photodetector (9) detects firs scattered light resulting from scattering of first laser beam at the first irradiation position (5a), second scattered light resulting from scattering of second laser beam at the first irradiation position (5a), third scattered light resulting from scattering of the first laser beam at the second irradiation position (5b), and fourth scattered light resulting from scattering of the second laser beam at the second irradiation position (5b). A concentration calculator (11) calculates a concentration of a target component between the first irradiation position (5a) and the second irradiation position (5b), based on detection values of the first, second, third, and fourth scattered light obtained by the photodetector (9).
    • 10. 发明专利
    • APPARATUS AND METHOD FOR DETERMINING CONCENTRATION OF GASEOUS COMPONENT
    • CA2740283A1
    • 2010-05-20
    • CA2740283
    • 2009-08-03
    • IHI CORP
    • IZAWA JUNHAMANO YASUNORIKUBOTA NOBUHIKO
    • G01N21/49
    • Sufficiently large optical values are detected without the need of using a laser having a high emission intensity or a large light collector, and the determination of the concentration of a target component within a desired section is rendered possible. The orientation of a laser (3) is horizontally or vertically changed to thereby switch the laser-irradiated site of a ground or water surface (5) between a first irradiated site (5a) and a second irradiated site (5b). A first scattered light resulting from the scattering of a first laser light at the first irradiated site (5a), a second scattered light resulting form the scattering of a second laser light at the first irradiated site (5a), a third scattered light resulting from the scattering of the first laser light at the second irradiated site (5b), and a fourth scattered light resulting from the scattering of the second laser light at the second irradiated site (5b) are detected with a photodetector (9). Based on the values detected by the photodetector (9) for the first, second, third, and fourth scattered lights, the concentration of the target component in the section ranging from the first irradiated site (5a) to the second irradiated site (5b) is calculated with a concentration calculator (11).