Patents by Inventor Kazuteru TANAKA
Kazuteru TANAKA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11796458Abstract: A Concentration measurement device 100 comprises: a measurement cell 4 having a flow path through which a gas flows, a light source 1 for generating incident light to the measurement cell, a photodetector 7 for detecting light emitted from the measurement cell, a pressure sensor 20 for detecting a pressure of the gas in the measurement cell, a temperature sensor 22 for detecting a temperature of the gas in the measurement cell, and an arithmetic circuit 8 for calculating a concentration of the gas based on an output P of the pressure sensor, an output T of the temperature sensor, an output I of the photodetector, and an extinction coefficient ?, wherein the arithmetic circuit 8 is configured to calculate the concentration using the extinction coefficient ? determined on the basis of the output of the temperature sensor 22.Type: GrantFiled: January 21, 2020Date of Patent: October 24, 2023Assignee: FUJIKIN INCORPORATEDInventors: Masaaki Nagase, Kazuteru Tanaka, Masahiko Takimoto, Kouji Nishino, Nobukazu Ikeda
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Patent number: 11692931Abstract: The concentration measurement device 100 includes an electric unit 20 having a light source 22 and a photodetector 24, a fluid unit 10 having a measurement cell 1, optical fibers 11 and 12 for connecting the electric unit 20 and the fluid unit 10 and is configured to measure the concentration of the fluid in the measurement cell by detecting the light incident from the light source 22 to the measurement cell and then emitted from the measurement cell by the photodetector 24, where optical connection parts 32 and 34 connected to the optical fibers 11, 12 and the light source 22 or the photodetector 24 are integrally provided in the electric unit 20.Type: GrantFiled: March 31, 2020Date of Patent: July 4, 2023Assignee: FUJIKIN INCORPORATEDInventors: Masaaki Nagase, Kazuteru Tanaka, Masahiko Takimoto, Kouji Nishino, Nobukazu Ikeda
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Patent number: 11630058Abstract: A concentration measuring device 100 comprises: a measurement cell 4 having a flow path, a light source 1, a photodetector 7 for detecting light emitted from the measurement cell, and an arithmetic circuit 8 for calculating light absorbance and concentration of a fluid to be measured on the basis of an output of the photodetector, the measurement cell includes a cell body, a window portion 3 fixed to the cell body so as to contact the flow path, and a reflective member 5 for reflecting light incident on the measurement cell through the window portion, the window portion is fixed to the cell body 40 by a window holding member 30 via a gasket 15, an annular sealing protrusion 15a is provided on a first surface of the gasket for supporting the window portion, and an annular sealing protrusion 42a is also provided on a support surface 42 of the cell body for supporting the second surface opposite to the first surface of the gasket.Type: GrantFiled: June 10, 2022Date of Patent: April 18, 2023Assignee: FUJIKIN INCORPORATEDInventors: Masaaki Nagase, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
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Publication number: 20220299432Abstract: A concentration measuring device 100 comprises: a measurement cell 4 having a flow path, a light source 1, a photodetector 7 for detecting light emitted from the measurement cell, and an arithmetic circuit 8 for calculating light absorbance and concentration of a fluid to be measured on the basis of an output of the photodetector, the measurement cell includes a cell body, a window portion 3 fixed to the cell body so as to contact the flow path, and a reflective member 5 for reflecting light incident on the measurement cell through the window portion, the window portion is fixed to the cell body 40 by a window holding member 30 via a gasket 15, an annular sealing protrusion 15a is provided on a first surface of the gasket for supporting the window portion, and an annular sealing protrusion 42a is also provided on a support surface 42 of the cell body for supporting the second surface opposite to the first surface of the gasket.Type: ApplicationFiled: June 10, 2022Publication date: September 22, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
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Publication number: 20220283081Abstract: The concentration measurement device 100 includes an electric unit 20 having a light source 22 and a photodetector 24, a fluid unit 10 having a measurement cell 1, a first light-transmission member 11 for transmitting light from the light source to the measurement cell, a second light transmission member 12 for transmitting light from the measurement cell to the photodetector, a lens 3A provided in the fluid unit, the lens 3A being arranged such that light from the first light transmission member is to be incident on the first position and light is to be emitted from the second position to the second light transmission member, a pressure sensor 5 for measuring pressure of fluid flowing through the measurement cell, and an arithmetic circuit 28 for detecting concentration of the fluid flowing through the measurement cell, the arithmetic circuit being configured to calculate the fluid concentration based on the output of the photodetector and a correction factor related to the pressure output by the pressure seType: ApplicationFiled: August 31, 2020Publication date: September 8, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Masahiko TAKIMOTO, Kazuteru TANAKA, Kouji NISHINO, Nobukazu IKEDA
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Patent number: 11391668Abstract: A concentration measuring device 100 comprises: a measurement cell 4 having a flow path, a light source 1, a photodetector 7 for detecting light emitted from the measurement cell, and an arithmetic circuit 8 for calculating light absorbance and concentration of a fluid to be measured on the basis of an output of the photodetector, the measurement cell includes a cell body, a window portion 3 fixed to the cell body so as to contact the flow path, and a reflective member 5 for reflecting light incident on the measurement cell through the window portion, the window portion is fixed to the cell body 40 by a window holding member 30 via a gasket 15, an annular sealing protrusion 15a is provided on a first surface of the gasket for supporting the window portion, and an annular sealing protrusion 42a is also provided on a support surface 42 of the cell body for supporting the second surface opposite to the first surface of the gasket.Type: GrantFiled: September 17, 2019Date of Patent: July 19, 2022Assignee: FUJIKIN INCORPORATEDInventors: Masaaki Nagase, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
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Publication number: 20220170849Abstract: The concentration measurement device 100 includes an electric unit 20 having a light source 22 and a photodetector 24, a fluid unit 10 having a measurement cell 1, optical fibers 11 and 12 for connecting the electric unit 20 and the fluid unit 10 and is configured to measure the concentration of the fluid in the measurement cell by detecting the light incident from the light source 22 to the measurement cell and then emitted from the measurement cell by the photodetector 24, where optical connection parts 32 and 34 connected to the optical fibers 11, 12 and the light source 22 or the photodetector 24 are integrally provided in the electric unit 20.Type: ApplicationFiled: March 31, 2020Publication date: June 2, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Kazuteru TANAKA, Masahiko TAKIMOTO, Kouji NISHINO, Nobukazu IKEDA
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Publication number: 20220074851Abstract: A Concentration measurement device 100 comprises: a measurement cell 4 having a flow path through which a gas flows, a light source 1 for generating incident light to the measurement cell, a photodetector 7 for detecting light emitted from the measurement cell, a pressure sensor 20 for detecting a pressure of the gas in the measurement cell, a temperature sensor 22 for detecting a temperature of the gas in the measurement cell, and an arithmetic circuit 8 for calculating a concentration of the gas based on an output P of the pressure sensor, an output T of the temperature sensor, an output I of the photodetector, and an extinction coefficient ?, wherein the arithmetic circuit 8 is configured to calculate the concentration using the extinction coefficient ? determined on the basis of the output of the temperature sensor 22.Type: ApplicationFiled: January 21, 2020Publication date: March 10, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Kazuteru TANAKA, Masahiko TAKIMOTO, Kouji NISHINO, Nobukazu IKEDA
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Publication number: 20220034794Abstract: A concentration measuring device 100 comprises: a measurement cell 4 having a flow path, a light source 1, a photodetector 7 for detecting light emitted from the measurement cell, and an arithmetic circuit 8 for calculating light absorbance and concentration of a fluid to be measured on the basis of an output of the photodetector, the measurement cell includes a cell body, a window portion 3 fixed to the cell body so as to contact the flow path, and a reflective member 5 for reflecting light incident on the measurement cell through the window portion, the window portion is fixed to the cell body 40 by a window holding member 30 via a gasket 15, an annular sealing protrusion 15a is provided on a first surface of the gasket for supporting the window portion, and an annular sealing protrusion 42a is also provided on a support surface 42 of the cell body for supporting the second surface opposite to the first surface of the gasket.Type: ApplicationFiled: September 17, 2019Publication date: February 3, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Kazuteru TANAKA, Keiji HIRAO, Tadayuki YAKUSHIJIN, Kouji NISHINO, Michio YAMAJI, Nobukazu IKEDA
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Patent number: 10976240Abstract: 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.Type: GrantFiled: August 9, 2016Date of Patent: April 13, 2021Assignees: TOKUSHIMA UNIVERSITY, FUJIKIN INCORPORATEDInventors: Yoshihiro Deguchi, Masaaki Nagase, Michio Yamaji, Nobukazu Ikeda, Kouji Nishino, Masayoshi Kawashima, Kazuteru Tanaka
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Patent number: 10928303Abstract: 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.Type: GrantFiled: July 25, 2017Date of Patent: February 23, 2021Assignees: TOKUSHIMA UNIVERSITY, FUJIKIN INCORPORATEDInventors: Yoshihiro Deguchi, Takashi Fukawa, Taiki Hattori, Masaaki Nagase, Kazuteru Tanaka, Kouji Nishino, Nobukazu Ikeda
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Publication number: 20190271636Abstract: 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.Type: ApplicationFiled: July 25, 2017Publication date: September 5, 2019Applicants: TOKUSHIMA UNIVERSITY, FUJIKIN INCORPORATEDInventors: Yoshihiro DEGUCHI, Takashi FUKAWA, Taiki HATTORI, Masaaki NAGASE, Kazuteru TANAKA, Kouji NISHINO, Nobukazu IKEDA
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Patent number: 10324029Abstract: 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.Type: GrantFiled: August 9, 2016Date of Patent: June 18, 2019Assignees: TOKUSHIMA UNIVERSITY, FUJIKIN INCORPORATEDInventors: Yoshihiro Deguchi, Masaaki Nagase, Michio Yamaji, Nobukazu Ikeda, Kouji Nishino, Masayoshi Kawashima, Kazuteru Tanaka
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Publication number: 20180217053Abstract: 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.Type: ApplicationFiled: August 9, 2016Publication date: August 2, 2018Applicants: TOKUSHIMA UNIVERSITY, FUJIKIN INCORPORATEDInventors: Yoshihiro DEGUCHI, Masaaki NAGASE, Michio YAMAJI, Nobukazu IKEDA, Kouji NISHINO, Masayoshi KAWASHIMA, Kazuteru TANAKA
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Publication number: 20180217054Abstract: 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.Type: ApplicationFiled: August 9, 2016Publication date: August 2, 2018Applicants: TOKUSHIMA UNIVERSITY, FUJIKIN INCORPORATEDInventors: Yoshihiro DEGUCHI, Masaaki NAGASE, Michio YAMAJI, Nobukazu IKEDA, Kouji NISHINO, Masayoshi KAWASHIMA, Kazuteru TANAKA