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公开(公告)号：US12078590B2
公开(公告)日：2024-09-03
申请号：US17905486
申请日：2021-03-04
Applicant: TOKUSHIMA UNIVERSITY , FUJIKIN INCORPORATED
Inventor： Yoshihiro Deguchi , Masaaki Nagase , Kouji Nishino , Nobukazu Ikeda
IPC: G01N21/3504 , G01N21/27 , G01N21/31
CPC classification number: G01N21/274 , G01N21/314 , G01N21/3504
Abstract: A concentration measurement method performed in a concentration measurement device including an electric unit having a light source and a photodetector, a fluid unit having a measurement cell through which a gas flows, and a processing circuit for calculating a concentration of the gas based on an intensity of a light passing through the measurement cell. The concentration measurement method includes a step of determining an absorption coefficient of the measurement gas using a reference absorption coefficient determined in association with the reference gas and a correction factor associated with the measurement gas, and a step of obtaining a concentration of the measurement gas flowing in the measurement cell using the absorption coefficient of the measurement gas. When the absorption peak wavelength of the measurement gas is longer than the peak wavelength of the light source, a reference gas having a longer absorption peak wavelength than the peak wavelength of the light source is used, and when the absorption peak wavelength of the measurement gas is shorter than the peak wavelength of the light source, a reference gas having a shorter absorption peak wavelength than the peak wavelength of the light source is used.
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公开(公告)号：US10928303B2
公开(公告)日：2021-02-23
申请号：US16320002
申请日：2017-07-25
Applicant: TOKUSHIMA UNIVERSITY , FUJIKIN INCORPORATED
Inventor： Yoshihiro Deguchi , Takashi Fukawa , Taiki Hattori , Masaaki Nagase , Kazuteru Tanaka , Kouji Nishino , Nobukazu Ikeda
Abstract: A concentration measuring device includes a measuring cell having a flow passage and a translucent window, a light source for emitting light to the measuring cell through the window, a reflective member for reflecting light propagating through the measuring cell to the window, a light detector for detecting the light exiting from the window, a calculation part for calculating the concentration of the fluid on the basis of a detection signal from the light detector, and an optical device for guiding the light from the light source to the window and guiding the light from the window to the light detector.
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公开(公告)号：US10324029B2
公开(公告)日：2019-06-18
申请号：US15748261
申请日：2016-08-09
Applicant: TOKUSHIMA UNIVERSITY , FUJIKIN INCORPORATED
Inventor： Yoshihiro Deguchi , Masaaki Nagase , Michio Yamaji , Nobukazu Ikeda , Kouji Nishino , Masayoshi Kawashima , Kazuteru Tanaka
IPC: G01N21/31 , G01N21/33 , G01J3/42 , G01N21/59 , G01N21/27 , G01J3/10 , G01J3/28 , G01J3/433 , G01J3/02 , G01N21/3504 , G01J1/42
Abstract: A concentration measurement device including at least one light source; a measurement cell for containing a fluid to be measured; a splitter for dividing light from the light source into incident light being incident into the measurement cell and non-incident light not being incident into the measurement cell; a transmitted-light detector for detecting transmitted light that is the incident light having passed through the measurement cell; a non-incident light detector for detecting the non-incident light; and an arithmetic part for correcting a detection signal of the transmitted-light detector using a detection signal of the non-incident light detector.
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公开(公告)号：US10732099B2
公开(公告)日：2020-08-04
申请号：US16068087
申请日：2016-12-20
Applicant: TOKUSHIMA UNIVERSITY
Inventor： Yoshihiro Deguchi
IPC: G01N21/27 , G01N21/39 , G01N21/3504 , G01N21/03
Abstract: A gas analysis device includes a laser light source configured to output a laser beam, an irradiation unit configured to irradiate a measurement region including measurement target gas with the laser beams in plural directions, plural photoreceivers each configured to receive a laser beam having passed through the measurement region and output an electric signal according to intensity of the received laser beam, and an analyzer configured to analyze the physical state of the measurement target gas based on the electric signal output from each photoreceiver. The analyzer sets a function (e.g. two-dimensional polynomial f(X,Y)) representing the physical state (e.g. concentration, temperature) of the target gas at least in the measurement region, and measures the physical state of the target gas by determining a coefficient of each of terms included in the function based on a measured value obtained from the electric signal output from the photoreceiver.
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公开(公告)号：US20160178517A1
公开(公告)日：2016-06-23
申请号：US14913296
申请日：2014-08-21
Applicant: TOKUSHIMA UNIVERSITY
Inventor： Yoshihiro Deguchi , Takahiro Kamimoto
IPC: G01N21/61 , G01N21/3504 , G01N21/31 , G01K11/18 , G01N21/39
CPC classification number: G01N21/61 , G01J3/427 , G01J3/4338 , G01J5/0014 , G01J5/601 , G01K11/00 , G01K11/18 , G01N21/3151 , G01N21/3504 , G01N21/39 , G01N2021/399
Abstract: A gas analyzing apparatus includes first and second laser sources (11, 12) that output first and second laser lights, a laser controller (14) that controls the first and second laser sources to vary wavelengths of the first and second laser lights in the respective predetermined wavelength ranges, an optical multiplexer (15, 17) that multiplexes the first and second laser lights to transmit the multiplexed laser light to a target gas, an optical receiver (19) that receives the laser light transmitted through the target gas, and an analyzer (23) that analyzes a temperature and/or a concentration of the target gas based on an electric signal output from the optical receiver. While varying the wavelengths of the laser lights, the laser controller (14) controls amplitudes of the first and second laser lights to differ from each other and varies intensities of the first and second laser lights in the opposite direction.
Abstract translation: 气体分析装置包括输出第一和第二激光的第一和第二激光源（11,12），控制第一和第二激光源以改变相应的第一和第二激光的波长的激光控制器（14） 预定的波长范围，多路复用第一和第二激光以将复用的激光发射到目标气体的光复用器（15,17），接收透过目标气体的激光的光接收器（19），以及 分析器（23），其基于从光接收器输出的电信号来分析目标气体的温度和/或浓度。 在激光的波长变化的同时，激光控制器（14）控制第一和第二激光的振幅彼此不同，并且使第一和第二激光的强度在相反方向上变化。
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Patent Agency Ranking
公开(公告)号：US10976240B2
公开(公告)日：2021-04-13
申请号：US15748264
申请日：2016-08-09
Applicant: TOKUSHIMA UNIVERSITY , FUJIKIN INCORPORATED
Inventor： Yoshihiro Deguchi , Masaaki Nagase , Michio Yamaji , Nobukazu Ikeda , Kouji Nishino , Masayoshi Kawashima , Kazuteru Tanaka
IPC: G01N21/94 , G01N21/31 , G01N21/33 , G01N21/27 , G01J3/10 , G01J3/42 , G01N21/59 , G01N21/15 , G01N21/55 , G01N21/88
Abstract: A concentration measurement device for measuring the concentration of a measured fluid within a measurement cell by detecting transmitted light that has passed through the measurement cell having a light incidence window and a light emission window disposed opposing to each other, comprising a reflected-light detector for detecting reflected light of the light incidence window.
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公开(公告)号：US10302563B2
公开(公告)日：2019-05-28
申请号：US14913296
申请日：2014-08-21
Applicant: Tokushima University
Inventor： Yoshihiro Deguchi , Takahiro Kamimoto
IPC: G01N21/61 , G01N21/3504 , G01J3/427 , G01N21/31 , G01N21/39 , G01J5/00 , G01J3/433 , G01J5/60 , G01K11/18 , G01K11/00
Abstract: A gas analyzing apparatus includes first and second laser sources that output first and second laser lights, a laser controller that controls the first and second laser sources to vary wavelengths of the first and second laser lights in the respective predetermined wavelength ranges, an optical multiplexer that multiplexes the first and second laser lights to transmit the multiplexed laser light to a target gas, an optical receiver that receives the laser light transmitted through the target gas, and an analyzer that analyzes a temperature and/or a concentration of the target gas based on an electric signal output from the optical receiver. While varying the wavelengths of the laser lights, the laser controller controls amplitudes of the first and second laser lights to differ from each other and varies intensities of the first and second laser lights in the opposite direction.
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公开(公告)号：US10222323B2
公开(公告)日：2019-03-05
申请号：US15321398
申请日：2015-07-23
Applicant: TOKUSHIMA UNIVERSITY , FUJIKIN INCORPORATED
Inventor： Yoshihiro Deguchi , Masaaki Nagase , Nobukazu Ikeda , Michio Yamaji , Tadayuki Yakushijin
Abstract: An inline concentration measurement device comprises: a measurement cell main body with a gas flow path formed; a light incident part with a window member connected to the main body; and a light receiving part with a window member connected to the main body, wherein the gas flow path includes a gas flow path for an optical path extending straight between the window members of the light incident part and the light receiving part, a first communication part making a gas inlet formed in the main body communicate with the gas flow path part for the optical path, and a second communication part making a gas outlet formed in the main body communicate with the gas flow path part for the optical path, and the first communication part obliquely extends from the gas inlet towards the window member of the light incident part.
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公开(公告)号：US10371630B2
公开(公告)日：2019-08-06
申请号：US14909424
申请日：2014-07-18
Applicant: TOKUSHIMA UNIVERSITY , FUJIKIN INCORPORATED
Inventor： Yoshihiro Deguchi , Masaaki Nagase , Nobukazu Ikeda , Michio Yamaji
Abstract: An inline concentration meter includes a light source unit emitting mixed light containing at least two wavelengths with a phase difference, a detecting unit including a light incident part for entering the mixed light emitted from the light source unit into a fluid passage of a detector body and at least two light detection parts receiving the mixed light passed through the fluid passage, a computing processor unit conducting frequency analyzes of detection signals of the mixed light output from the respective light detection parts and computing variations of intensities of the detection signals corresponding to absorbances in at least two frequency ranges to compute a concentration of fluid in the fluid passage based on the variations of the intensities of the detection signals, and a recording/displaying unit recording and displaying a value of the fluid concentration computed at the computing processor unit.
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公开(公告)号：US20190049368A1
公开(公告)日：2019-02-14
申请号：US16068087
申请日：2016-12-20
Applicant: TOKUSHIMA UNIVERSITY
Inventor： Yoshihiro Deguchi
CPC classification number: G01N21/27 , G01N21/031 , G01N21/3504 , G01N21/39
Abstract: A gas analysis device includes a laser light source configured to output a laser beam, an irradiation unit configured to irradiate a measurement region including measurement target gas with the laser beams in plural directions, plural photoreceivers each configured to receive a laser beam having passed through the measurement region and output an electric signal according to intensity of the received laser beam, and an analyzer configured to analyze the physical state of the measurement target gas based on the electric signal output from each photoreceiver. The analyzer sets a function (e.g. two-dimensional polynomial f(X,Y)) representing the physical state (e.g. concentration, temperature) of the target gas at least in the measurement region, and measures the physical state of the target gas by determining a coefficient of each of terms included in the function based on a measured value obtained from the electric signal output from the photoreceiver.
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