Patents by Inventor Hirotaka YABUSHITA

Hirotaka YABUSHITA 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).

  • Patent number: 11448589
    Abstract: An analyzer analyzes a measurement sample on the basis of spectrum data obtained by irradiating light to the measurement sample. The analyzer includes a main analysis part, a correlation data storage part and a concentration calculation part. The main analysis part calculates a concentration of a predetermined hydrocarbon component contained in the measurement sample on the basis of the spectrum data of the measurement sample. The correlation data storage part stores therein a plurality of correlation data each indicating a correlation between a concentration of the predetermined hydrocarbon component or the spectrum data and a THC concentration. The concentration calculation part selects at least one correlation data from among a plurality of correlation data stored in the correlation data storage part according to the concentration of the predetermined hydrocarbon component, and calculates a concentration of the total hydrocarbon components in the measurement sample by using correlation data thus selected.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: September 20, 2022
    Assignee: HORIBA, LTD.
    Inventor: Hirotaka Yabushita
  • Publication number: 20200408675
    Abstract: An analyzer analyzes a measurement sample on the basis of spectrum data obtained by irradiating light to the measurement sample. The analyzer includes a main analysis part, a correlation data storage part and a concentration calculation part. The main analysis part calculates a concentration of a predetermined hydrocarbon component contained in the measurement sample on the basis of the spectrum data of the measurement sample. The correlation data storage part stores therein a plurality of correlation data each indicating a correlation between a concentration of the predetermined hydrocarbon component or the spectrum data and a THC concentration. The concentration calculation part selects at least one correlation data from among a plurality of correlation data stored in the correlation data storage part according to the concentration of the predetermined hydrocarbon component, and calculates a concentration of the total hydrocarbon components in the measurement sample by using correlation data thus selected.
    Type: Application
    Filed: June 25, 2020
    Publication date: December 31, 2020
    Applicant: HORIBA, LTD.
    Inventor: Hirotaka YABUSHITA
  • Publication number: 20200386678
    Abstract: An exhaust gas analyzer to analyze exhaust gas discharged from an internal combustion engine includes an infrared light source, a photodetector, a CO2 concentration calculation part and an O2 concentration calculation part. The infrared light source irradiates infrared light to the exhaust gas. The photodetector detects infrared light after passing through the exhaust gas. The CO2 concentration calculation part calculates a CO2 concentration in the exhaust gas on the basis of a detection signal obtained by the photodetector. The O2 concentration calculation part calculates an O2 concentration in the exhaust gas from the CO2 concentration by using a fuel combustion reaction equation and an EGR rate in an exhaust gas recirculation system or a value related to the EGR rate.
    Type: Application
    Filed: June 5, 2020
    Publication date: December 10, 2020
    Applicant: HORIBA, LTD.
    Inventors: Yuichi MORI, Hirotaka YABUSHITA
  • Patent number: 9799504
    Abstract: In order to attain a main objective of the present invention to provide an ion source capable of efficiently extracting ions, the ion source is configured to include: a conductive tubular body having an ion emitting aperture in a tip surface thereof and a penetration portion in a side wall thereof allowing thermo-electrons to pass through from an outside toward an inside; a mesh surrounding an outer periphery of the penetration portion; and a thermionic emission filament surrounding an outer periphery of the mesh, such that the thermo-electrons emitted from the thermionic emission filament pass through the mesh and reach the inside of the conductive tubular body through the penetration portion.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: October 24, 2017
    Assignee: HORIBA STEC, CO., LTD.
    Inventors: Masanobu Nakazono, Hirotaka Yabushita, Junya Nakai, Tomoko Katsuda
  • Publication number: 20170170000
    Abstract: In order to attain a main objective of the present invention to provide an ion source capable of efficiently extracting ions, the ion source is configured to include: a conductive tubular body having an ion emitting aperture in a tip surface thereof and a penetration portion in a side wall thereof allowing thermo-electrons to pass through from an outside toward an inside; a mesh surrounding an outer periphery of the penetration portion; and a thermionic emission filament surrounding an outer periphery of the mesh, such that the thermo-electrons emitted from the thermionic emission filament pass through the mesh and reach the inside of the conductive tubular body through the penetration portion.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 15, 2017
    Applicant: HORIBA STEC, CO., LTD.
    Inventors: Masanobu NAKAZONO, Hirotaka YABUSHITA, Junya NAKAI, Tomoko KATSUDA