Patents by Inventor Genki Yoshikawa

Genki Yoshikawa 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).

  • Publication number: 20200141032
    Abstract: A fiber structure includes a plurality of fiber layers stacked in a stacking direction and a plurality of binding yarns that bind the fiber layers together in the stacking direction. Each of the binding yarns is engaged with the first fiber bundles that configure two fiber layers located at opposite ends of the fiber structure in the stacking direction. Each first fiber bundle has an engagement portion as a section that is engaged with the binding yarn and a non-engagement portion as a section that is not engaged with the binding yarns. Regarding the engagement portion and the non-engagement portion, the dimension of the non-engagement portion in the stacking direction is greater than the dimension of the engagement portion in the stacking direction.
    Type: Application
    Filed: June 26, 2018
    Publication date: May 7, 2020
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Genki YOSHIKAWA
  • Publication number: 20200075134
    Abstract: The present invention provides a method and a device for estimating a value to be estimated associated with a specimen, by performing machine learning of a relationship between a value of an estimation object and an output corresponding thereto, based on an output from a chemical sensor with regard to a plurality of specimens for which specific values to be estimated are known, and using the result of the mechanical learning to estimate a specific value to be estimated on the basis of an output from the chemical sensor with regard to a given unknown specimen.
    Type: Application
    Filed: November 21, 2017
    Publication date: March 5, 2020
    Applicant: National Institute for Materials Science
    Inventors: Kota Shiba, Ryo Tamura, Gaku Imamura, Genki Yoshikawa
  • Patent number: 10564082
    Abstract: According to improvement of the receptor layer of various sensors of the type for detecting physical parameters (for example, a surface stress sensor, QCM, and SPR), all of high sensitivity, selectivity, and durability are achieved simultaneously. A porous material or a particulate material, e.g., nanoparticles, is used in place of a uniform membrane which has been conventionally used as a receptor layer. Accordingly, the sensitivity can be controlled by changing the membrane thickness of the receptor layer, the selectivity can be controlled by changing a surface modifying group to be fixed on the porous material or particulate material, and the durability can be controlled by changing the composition and surface properties of the porous material or particulate material.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: February 18, 2020
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Kota Shiba, Genki Yoshikawa, Yusuke Yamauchi, Norihiro Suzuki, Gaku Imamura, Kosuke Minami, Hamish Hei-Man Yeung
  • Publication number: 20190391122
    Abstract: Provided is a novel analysis method which, when a chemical sensor is used to perform a measurement, makes it possible to identify a sample without controlling or monitoring a change in the time the sample is introduced. According to the present invention, a sample can be identified without knowing a change in the time the sample is introduced, by using a chemical sensor having a plurality of channels each having different characteristics to perform a measurement, and performing an analysis on the basis of responses obtained from each channel.
    Type: Application
    Filed: February 16, 2018
    Publication date: December 26, 2019
    Inventors: Gaku IMAMURA, Genki YOSHIKAWA, Takashi WASHIO
  • Patent number: 10479871
    Abstract: A fiber structure for a fiber-reinforced composite material includes a section in which a width varies continuously along a central axis in a plan view. In a section in which the width increases continuously along the central axis, discontinuous fibers are aligned radially along the central axis, and both a thickness of the fiber structure and a density of the discontinuous fibers are uniform.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: November 19, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Genki Yoshikawa, Ryuta Kamiya
  • Patent number: 10458939
    Abstract: As a receptor layer, a film of a composite material of a base material such as a polymer and particles that adsorb an analyte is used. When the present invention is applied to a surface stress sensor or the like, the Young's modulus of the receptor layer, which significantly affects detection sensitivity, can be preset with a high degree of freedom, by independently selecting particles that adsorb a desired analyte and a base material that disperses said particles therein.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: October 29, 2019
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Kota Shiba, Genki Yoshikawa, Gaku Imamura
  • Publication number: 20190323982
    Abstract: The invention provides: a gas sensor device that is capable of removing a component adsorbed on a gas sensor by relatively simple means and easily restoring a signal baseline of the gas sensor to a constant state; and a method for removing a gas component. The gas sensor device according to an embodiment of the invention includes a gas sensor and cleaning means that contains a liquid for cleaning the gas sensor. The gas sensor includes a sensor main body that is capable of detecting a characteristic parameter of a component present in a gas phase or a liquid phase, and a sensitive membrane that is coated on a surface of the sensor main body and is durable against the liquid.
    Type: Application
    Filed: October 24, 2017
    Publication date: October 24, 2019
    Applicants: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, KYOCERA CORPORATION
    Inventors: Genki YOSHIKAWA, Kota SHIBA, Gaku IMAMURA, Takanori YASUDA, Kyohei KOBAYASHI, Hisashi SAKAI
  • Publication number: 20190317066
    Abstract: Provided is a novel analysis method that enables identification of a sample even when any sample is introduced during measurement carried out by using a chemical sensor. An input in which the amount of an unknown sample changes over time is provided to the chemical sensor, a response which is from the chemical sensor and which changes over time is measured, a sensor function (transmission function) of the chemical sensor with respect to the unknown sample is calculated on the basis of the input and the response, and the unknown sample is identified on the basis of the sensor function of the chemical sensor with respect to the unknown sample.
    Type: Application
    Filed: November 22, 2017
    Publication date: October 17, 2019
    Applicant: National Institute for Materials Science
    Inventors: Gaku Imamura, Genki Yoshikawa, Takashi Washio
  • Patent number: 10444133
    Abstract: A sample in a gas state to be measured is forced to impinge on a structure in which a change in a characteristic including a mechanical deformation, an optical change, an electric change and a magnetic change is exerted due to the impingement of a gaseous sample, a gasified liquid sample or solid sample to cause at least one of changes in characteristics including a mechanical deformation, an optical change, an electric change and a magnetic change; and the molecular weight of the sample in a gas state is obtained.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 15, 2019
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Genki Yoshikawa, Kota Shiba
  • Publication number: 20190300668
    Abstract: This fiber wound body has a plurality of reinforcing fiber yarns wound around a winding axis, each of the reinforcing fiber yarns having a thickness gradient portion in which the fiber content is uniform along the longitudinal direction of the yarn and the thickness gradually changes.
    Type: Application
    Filed: June 21, 2017
    Publication date: October 3, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Ryohei TSUJI, Genki YOSHIKAWA, Shun KUNO, Ryuta KAMIYA
  • Patent number: 10357937
    Abstract: A fiber laminate W is configured by laminating first to fourth fiber layers. The fiber laminate is provided with a taper section, in which the thickness changes depending on the position in the longitudinal direction. The first to fourth fiber layers are formed by discontinuous fibers and are configured with the orientation angles of the discontinuous fibers aligned in one direction. The orientation angles of the discontinuous fibers in the first to fourth fiber layers are different. In addition, the first to fourth fiber layers are provided with thickness changing sections, in which the thickness changes continuously while the density of fibers is kept constant irrespective of the position in the longitudinal direction. The taper section is configured by stacking the thickness changing sections. The change amount of the thickness of each thickness changing section is the same irrespective of the position in the longitudinal direction.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: July 23, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Genki Yoshikawa, Ryuta Kamiya
  • Publication number: 20180371651
    Abstract: A fabric laminate used as a reinforcing base material of a fiber-reinforced composite is constituted by laminating fabrics having warp yarns and weft yarns. Each warp yarn has a diameter-changing portion, in which the diameter of the yarn gradually changes in the yarn longitudinal direction in the vicinity of one end in the yarn longitudinal direction of the warp yarn.
    Type: Application
    Filed: December 8, 2016
    Publication date: December 27, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Genki YOSHIKAWA, Ryuta KAMIYA, Shun KUNO
  • Publication number: 20180356388
    Abstract: Provided is a sensor which enables detection/identification of various types of fuels for automobiles by using simple devices. According to the present invention, high-octane gas, regular gas, diesel oil, heating oil, gasoline laced with heating oil, and the like can be clearly identified without using a large-scale analysis such as gas chromatography or mass spectroscopy by using a sensor having a structure in which a surface of a sensor body which detects a surface stress or the like is coated with particles modified with a hydrocarbon group such as an alkyl group.
    Type: Application
    Filed: November 14, 2016
    Publication date: December 13, 2018
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Kota SHIBA, Genki YOSHIKAWA, Gaku IMAMURA
  • Publication number: 20180355128
    Abstract: A fiber structure for a fiber-reinforced composite material includes a section in which a width varies continuously along a central axis in a plan view. In a section in which the width increases continuously along the central axis, discontinuous fibers are aligned radially along the central axis, and both a thickness of the fiber structure and a density of the discontinuous fibers are uniform.
    Type: Application
    Filed: September 14, 2016
    Publication date: December 13, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Genki YOSHIKAWA, Ryuta KAMIYA
  • Publication number: 20180194098
    Abstract: A fiber laminate W is configured by laminating first to fourth fiber layers. The fiber laminate is provided with a taper section, in which the thickness changes depending on the position in the longitudinal direction. The first to fourth fiber layers are formed by discontinuous fibers and are configured with the orientation angles of the discontinuous fibers aligned in one direction. The orientation angles of the discontinuous fibers in the first to fourth fiber layers are different. In addition, the first to fourth fiber layers are provided with thickness changing sections, in which the thickness changes continuously while the density of fibers is kept constant irrespective of the position in the longitudinal direction. The taper section is configured by stacking the thickness changing sections. The change amount of the thickness of each thickness changing section is the same irrespective of the position in the longitudinal direction.
    Type: Application
    Filed: June 20, 2016
    Publication date: July 12, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Genki YOSHIKAWA, Ryuta KAMIYA
  • Publication number: 20180052085
    Abstract: A sample in a gas state to be measured is forced to impinge on a structure in which a change in a characteristic including a mechanical deformation, an optical change, an electric change and a magnetic change is exerted due to the impingement of a gaseous sample, a gasified liquid sample or solid sample to cause at least one of changes in characteristics including a mechanical deformation, an optical change, an electric change and a magnetic change; and the molecular weight of the sample in a gas state is obtained.
    Type: Application
    Filed: March 4, 2016
    Publication date: February 22, 2018
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Genki YOSHIKAWA, Kota SHIBA
  • Publication number: 20180017515
    Abstract: As a receptor layer, a film of a composite material of a base material such as a polymer and particles that adsorb an analyte is used. When the present invention is applied to a surface stress sensor or the like, the Young's modulus of the receptor layer, which significantly affects detection sensitivity, can be preset with a high degree of freedom, by independently selecting particles that adsorb a desired analyte and a base material that disperses said particles therein.
    Type: Application
    Filed: February 25, 2016
    Publication date: January 18, 2018
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Kota SHIBA, Genki YOSHIKAWA, Gaku IMAMURA
  • Publication number: 20180003604
    Abstract: According to improvement of the receptor layer of various sensors of the type for detecting physical parameters (for example, a surface stress sensor, QCM, and SPR), all of high sensitivity, selectivity, and durability are achieved simultaneously. A porous material or a particulate material, e.g., nanoparticles, is used in place of a uniform membrane which has been conventionally used as a receptor layer. Accordingly, the sensitivity can be controlled by changing the membrane thickness of the receptor layer, the selectivity can be controlled by changing a surface modifying group to be fixed on the porous material or particulate material, and the durability can be controlled by changing the composition and surface properties of the porous material or particulate material.
    Type: Application
    Filed: August 31, 2015
    Publication date: January 4, 2018
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Kota SHIBA, Genki YOSHIKAWA, Yusuke YAMAUCHI, Norihiro SUZUKI, Gaku IMAMURA, Kosuke MINAMI, Hamish Hei-Man YEUNG
  • Patent number: 9506822
    Abstract: A double-side-coated surface stress sensor includes a sensing membrane structure portion where at least two ends opposite each other are fixed on a mounting portion; a receptor layer that coats both surfaces of the sensing membrane structure portion; and an element detecting a stress, which is provided in the vicinity of at least one of the fixed two ends, opposite each other, of the sensing membrane structure portion or at least one of the fixed two ends, opposite each other, of the mounting portion, in which in a detection output is obtained from the element based on the stress which is applied onto the receptor layer coating both of the surfaces of the sensing membrane structure portion. Accordingly, it is possible to provide a double-side-coated surface stress sensor which coats both surfaces of the sensing membrane structure portion by the receptor layer, thereby obtaining a sufficiently large detection output.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: November 29, 2016
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Genki Yoshikawa, Masakazu Aono, Tomonobu Nakayama, Frederic Loizeau, Terunobu Akiyama, Sebastian Gautsch, Peter Vettiger
  • Patent number: 9212959
    Abstract: Deflection of a free end of one plate-like member, that is caused by uniform stress, is transmitted to an other plate-like member by moving a free end of the other plate-like member. According to this configuration, the uniform stress applied to the one plate-like member is converted into stress induced by a point force in the other plate-like member, and then, the induced stress is concentrated on a fixed end side narrow portion in which a piezoresistor is provided. Thus, a novel structure for a piezoresistive surface stress sensor having high sensitivity to uniform stress applied to the surface of the sensor is provided.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: December 15, 2015
    Assignee: National Institute for Materials Science
    Inventors: Genki Yoshikawa, Heinrich Rohrer, Terunobu Akiyama, Vettiger Peter