Patents by Inventor Ryohto SAWADA

Ryohto SAWADA 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: 12000790
    Abstract: This invention prevents measurement error from becoming large in thermoelectric conversion coefficient evaluation and enhances evaluation efficiency. This invention is a physical property evaluation device for evaluating the physical properties of a plurality of solid materials formed on a substrate. The physical property evaluation device comprises an electromotive force measurement means that forms closed circuits including the individual solid materials and measures the electromotive forces occurring at the two ends of each of the solid materials, a means for producing heat flow within the individual solid materials, an external magnetic field generation means for generating a uniform magnetic field having a given intensity and direction in the vicinity of the individual solid materials, and an automation means for evaluating the physical properties of the individual solid materials using the electromotive force measurement means, heat flow production means, and external magnetic field generation means.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: June 4, 2024
    Assignee: NEC CORPORATION
    Inventors: Masahiko Ishida, Ryohto Sawada, Yuma Iwasaki, Akihiro Kirihara, Hiroko Someya
  • Publication number: 20240112764
    Abstract: An information processing device includes one or more processors. The one or more processors are configured to optimize, for a specific elementary reaction in a reaction using a catalyst including a plurality of elementary reactions, an arrangement of a promoter element in the catalyst based on activation energy acquired using a trained model, and search for the promoter element based on the activation energy acquired using the trained model for each type of the promoter element.
    Type: Application
    Filed: December 8, 2023
    Publication date: April 4, 2024
    Applicants: ENEOS Corporation, Preferred Networks, Inc.
    Inventors: Yoshihiro YAYAMA, Yusuke ASANO, Takafumi ISHII, Takao KUDO, Taku WATANABE, Ryohto SAWADA
  • Patent number: 11917917
    Abstract: A thermoelectric conversion element that has a power generation layer containing an iron-aluminum based magnetic alloy material containing equal to or more than 70 weight percent of iron and aluminum in total. The power generation layer generates an electromotive force, due to an anomalous Nernst effect that develops in the magnetic alloy material in response to a temperature gradient applied thereto, in a direction intersecting both the magnetization direction of the magnetic alloy material and the direction of the applied temperature gradient.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: February 27, 2024
    Assignee: NEC CORPORATION
    Inventors: Akihiro Kirihara, Yasutomo Omori, Ryohto Sawada, Masahiko Ishida, Koichi Terashima, Yuma Iwasaki, Hiroko Someya
  • Patent number: 11870083
    Abstract: Provided are an exterior body and an abnormality detector capable of suppressing bulking even when a heat generation detection function is provided. The exterior body of an electronic device generates heat during operation and is characterized by being provided with a magnetic body that is at least a portion of the exterior body, that has spontaneous magnetization, and that generates an electromotive force by exhibiting an abnormal Nernst effect through heat generation of the electronic device, wherein an electrode for extracting power is provided to the magnetic body.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: January 9, 2024
    Assignee: NEC CORPORATION
    Inventors: Akihiro Kirihara, Yuma Iwasaki, Masahiko Ishida, Koichi Terashima, Ryohto Sawada
  • Patent number: 11744469
    Abstract: In order to enable the measurement of thermal property information about a subject, this thermal diffusion coefficient measuring device, which is used by contacting the surface of a living body, is provided with: a biological information sensor comprising a temperature sensor and a heat flux sensor; and a heating/cooling control means. The temperature sensor is provided at a position contacting the surface of the living body, and operates so as to detect skin temperature. The heat flux sensor is provided at a position contacting the surface of the living body, while being adjacent to the temperature sensor, and operates so as to detect heat flux on the surface of the living body. The heating/cooling control means enables the measurement of the temperature diffusion coefficient of a thermal resistance component that is present between the biological information sensor and a deep inner portion of the living body.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: September 5, 2023
    Assignees: NEC CORPORATION, TOHOKU UNIVERSITY
    Inventors: Masahiko Ishida, Ryo Iguchi, Yuki Shiomi, Eiji Saitoh, Ryohto Sawada, Akihiro Kirihara, Koichi Terashima, Yasuyuki Oikawa
  • Publication number: 20220058175
    Abstract: To assist a person to make an appropriate action plan based on multi-dimensional data. A data analysis apparatus includes an input part which receives first multi-dimensional data made up by a set of multi-dimensional vectors; a calculation part which divides a first multi-dimensional space spanned by the first multi-dimensional data into a second multi-dimensional space(s), interpolates second multi-dimensional data forming the second multi-dimensional space(s) among the first multi-dimensional data, and estimates a regression model(s); and an analysis part which determines whether or not there is a deficiency in the first multi-dimensional data based on an estimation result of the regression model(s).
    Type: Application
    Filed: September 12, 2019
    Publication date: February 24, 2022
    Applicant: NEC Corporation
    Inventor: Ryohto SAWADA
  • Publication number: 20220052247
    Abstract: A thermoelectric conversion element that has a power generation layer containing an iron-aluminum based magnetic alloy material containing equal to or more than 70 weight percent of iron and aluminum in total. The power generation layer generates an electromotive force, due to an anomalous Nernst effect that develops in the magnetic alloy material in response to a temperature gradient applied thereto, in a direction intersecting both the magnetization direction of the magnetic alloy material and the direction of the applied temperature gradient.
    Type: Application
    Filed: December 13, 2019
    Publication date: February 17, 2022
    Applicant: NEC Corporation
    Inventors: Akihiro KIRIHARA, Yasutomo OMORI, Ryohto SAWADA, Masahiko ISHIDA, Koichi TERASHIMA, Yuma IWASAKI, Hiroko SOMEYA
  • Publication number: 20220037576
    Abstract: A portable power supply according to the present invention is provided with a combustion device (20) and a heating container (30) that retains an object to be heated, wherein at least a part of a portion of the heating container, the portion being directly heated by the combustion device, is provided with a magnetic metal plate (32) that has spontaneous magnetization and that generates electromotive force due to an anomalous Nernst effect induced by the heating, and wherein electrodes (33a, 33b) for drawing power are provided. Thus, the heating container for generating electricity has a simple configuration, and furthermore the portable power supply is provided with both the heating container and the combustion device.
    Type: Application
    Filed: November 14, 2019
    Publication date: February 3, 2022
    Applicant: NEC Corporation
    Inventors: Akihiro KIRIHARA, Masahiko ISHIDA, Koichi TERASHIMA, Yuma IWASAKI, Ryohto SAWADA, Yasutomo OMORI
  • Publication number: 20210395865
    Abstract: A magnetic alloy material that includes iron and cobalt as main components and at least one element selected from the group containing of platinum, gold, and iridium.
    Type: Application
    Filed: November 21, 2019
    Publication date: December 23, 2021
    Applicant: NEC Corporation
    Inventors: Yuma IWASAKI, Masahiko ISHIDA, Akihiro KIRIHARA, Koichi TERASHIMA, Ryohto SAWADA, Hiroko SOMEYA, Yasutomo OMORI
  • Publication number: 20210366666
    Abstract: Provided are an exterior body and an abnormality detector capable of suppressing bulking even when a heat generation detection function is provided. The exterior body of an electronic device generates heat during operation and is characterized by being provided with a magnetic body that is at least a portion of the exterior body, that has spontaneous magnetization, and that generates an electromotive force by exhibiting an abnormal Nernst effect through heat generation of the electronic device, wherein an electrode for extracting power is provided to the magnetic body.
    Type: Application
    Filed: October 25, 2019
    Publication date: November 25, 2021
    Applicant: NEC Corporation
    Inventors: Akihiro KIRIHARA, Yuma IWASAKI, Masahiko ISHIDA, Koichi TERASHIMA, Ryohto SAWADA
  • Publication number: 20210302343
    Abstract: This invention prevents measurement error from becoming large in thermoelectric conversion coefficient evaluation and enhances evaluation efficiency. This invention is a physical property evaluation device for evaluating the physical properties of a plurality of solid materials formed on a substrate. The physical property evaluation device comprises an electromotive force measurement means that forms closed circuits including the individual solid materials and measures the electromotive forces occurring at the two ends of each of the solid materials, a means for producing heat flow within the individual solid materials, an external magnetic field generation means for generating a uniform magnetic field having a given intensity and direction in the vicinity of the individual solid materials, and an automation means for evaluating the physical properties of the individual solid materials using the electromotive force measurement means, heat flow production means, and external magnetic field generation means.
    Type: Application
    Filed: August 5, 2019
    Publication date: September 30, 2021
    Applicant: NEC Corporation
    Inventors: Masahiko ISHIDA, Ryohto SAWADA, Yuma IWASAKI, Akihiro KIRIHARA, Hiroko SOMEYA
  • Patent number: 11105376
    Abstract: In order to determine information about the generation of heat in a bearing (10) in a simple manner, a bearing (10) includes an outer ring (12) secured to a securing member, and an inner ring (11) provided on the inside of the outer ring (12) and secured to a shaft that rotates in the circumferential direction relative to the securing member. A thermal flow sensor (14) is provided as a coating on a securing-side surface that includes the outer ring (12), and generates a thermoelectromotive force including information about frictional heat generated with the rotation of the shaft.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: August 31, 2021
    Assignees: NEC CORPORATION, TOHOKU UNIVERSITY
    Inventors: Akihiro Kirihara, Masahiko Ishida, Koichi Terashima, Ryohto Sawada, Eiji Saitoh, Yasuyuki Oikawa, Ryo Iguchi, Masao Ono
  • Publication number: 20210026853
    Abstract: A combination search system includes: a storage that stores actual data in which input information indicating a combination of values taken by elements of the multi dimensions in the confirmation work in the past or in a real space is associated with output information indicating a value of the predetermined parameter obtained for the combination indicated by the input information at that time; and a search unit that repeats, a process of determining at least one combination to be used in next confirmation work on the basis of importance of information that is an index defined for each combination of the elements, the index being calculated from the actual data and being based on an amount of change in uncertainty of the value of the predetermined parameter in a whole of a search space due to that new output information for the combination is added to the actual data.
    Type: Application
    Filed: February 15, 2019
    Publication date: January 28, 2021
    Applicant: NEC Corporation
    Inventors: Ryohto SAWADA, Masahiko ISHIDA, Yuma IWASAKI
  • Publication number: 20200395526
    Abstract: To protect the surface of a member exposed to a high-temperature environment and detect surface temperature or heat flow distribution, this magnetic thermoelectric conversion element, which is provided on the surface of a support in contact with a heat source, has: a magnetic body; an electromotive body which is magnetically coupled to the magnetic body and has electrical conductivity; and a heat-resistant metal oxide film covering the magnetic body and the electromotive body.
    Type: Application
    Filed: November 21, 2018
    Publication date: December 17, 2020
    Applicants: NEC CORPORATION, TOHOKU UNIVERSITY
    Inventors: Masahiko ISHIDA, Akihiro KIRIHARA, Ryohto SAWADA, Eiji SAITOH, Ryo IGUCHI, Yasuyuki OIKAWA, Masao ONO
  • Publication number: 20200313062
    Abstract: A thermoelectric conversion element 10 includes an anomalous Nernst material 11 having the anomalous Nernst effect, in which: the anomalous Nernst material 11 includes at least an element having the inverse spin-Hall effect; and the element is spin-polarized. By applying, for example, a magnetic field to such the thermoelectric conversion element 10 in the x direction and a temperature gradient thereto in the z direction, thermoelectromotive force can be taken out from terminals 12.
    Type: Application
    Filed: August 13, 2018
    Publication date: October 1, 2020
    Applicant: NEC CORPORATION
    Inventors: Yuma IWASAKI, Masahiko ISHIDA, Akihiro KIRIHARA, Koichi TERASHIMA, Ryohto SAWADA, Hiroko SOMEYA
  • Publication number: 20200263736
    Abstract: In order to determine information about the generation of heat in a bearing (10) in a simple manner, a bearing (10) includes an outer ring (12) secured to a securing member, and an inner ring (11) provided on the inside of the outer ring (12) and secured to a shaft that rotates in the circumferential direction relative to the securing member. A thermal flow sensor (14) is provided as a coating on a securing-side surface that includes the outer ring (12), and generates a thermoelectromotive force including information about frictional heat generated with the rotation of the shaft.
    Type: Application
    Filed: August 3, 2018
    Publication date: August 20, 2020
    Applicants: NEC CORPORARATION, TOHOKU UNIVERSITY
    Inventors: Akihiro KIRIHARA, Masahilo ISHIDA, Koichi TERASHIMA, Ryohto SAWADA, Eiji SAITOH, Yasuyuki OIKAWA, Ryo IGUCHI, Masao ONO
  • Publication number: 20200194651
    Abstract: A thermoelectric conversion unit includes a plurality of pipes 1 and a thermoelectric conversion element. A first fluid flows through the pipe 1. The thermoelectric conversion element 2 is wound around each of the pipes 1, and generates electric power due to a temperature difference between the first fluid and a second fluid flowing outside the pipe 1. Further, the thermoelectric conversion element 2 has a sheet shape.
    Type: Application
    Filed: December 5, 2017
    Publication date: June 18, 2020
    Applicant: NEC CORPORATION
    Inventors: Yuma IWASAKI, Masahiko ISHIDA, Akihiro KIRIHARA, Koichi TERASHIMA, Ryohto SAWADA, Hiroko SOMEYA
  • Publication number: 20200037884
    Abstract: In order to enable the measurement of thermal property information about a subject, this thermal diffusion coefficient measuring device, which is used by contacting the surface of a living body, is provided with: a biological information sensor comprising a temperature sensor and a heat flux sensor; and a heating/cooling control means. The temperature sensor is provided at a position contacting the surface of the living body, and operates so as to detect skin temperature. The heat flux sensor is provided at a position contacting the surface of the living body, while being adjacent to the temperature sensor, and operates so as to detect heat flux on the surface of the living body. The heating/cooling control means enables the measurement of the temperature diffusion coefficient of a thermal resistance component that is present between the biological information sensor and a deep inner portion of the living body.
    Type: Application
    Filed: March 20, 2018
    Publication date: February 6, 2020
    Applicants: NEC CORPORATION, TOHOKU UNIVERSITY
    Inventors: Masahiko ISHIDA, Ryo IGUCHI, Yuki SHIOMI, Eiji SAITOH, Ryohto SAWADA, Akihiro KIRIHARA, Koichi TERASHIMA, Yasuyuki OIKAWA
  • Publication number: 20200034367
    Abstract: A relation search system includes: a storage means (1) which stores a data set which includes a first-type data group and a second-type data group which are two types of data group that are acquired by different methods; a data adaptation means (2) which either corrects or reconstructs either first data which belongs to the first-type data group or second data which belongs to the second-type data group and which is associated with the first data, such that a divergence which arises between the first data and the second data because of the difference in the methods for the acquisition thereof is reduced; and a learning means (3) which, using the data set which includes the corrected or reconstructed data, carries out machine learning.
    Type: Application
    Filed: March 6, 2018
    Publication date: January 30, 2020
    Applicant: NEC Corporation
    Inventors: Yuma IWASAKI, Masahiko ISHIDA, Akihiro KIRIHARA, Koichi TERASHIMA, Hiroko SOMEYA, Ryohto SAWADA