Patents by Inventor Natsuki TSUSHIMA

Natsuki TSUSHIMA 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: 10488183
    Abstract: A sensor system for sensing deformation of a flexible structure includes a beam structure that will be coupled to a surface of the flexible structure having a natural frequency fs, an axial strain ?axialstructure, and a shear strain ?xystructure associated therewith. The beam structure has an axial strain ?axialbeam and a shear strain ?xybeam associated therewith. The beam structure satisfies criteria defined by minimization of a root mean square difference between ?axialstructure and ?axialbeam and minimization of a root mean square difference between ?xystructure and ?xybeam. Fiber optic strain sensors are coupled to and distributed in a spaced-apart fashion along the beam structure. The beam structure is more flexible than the flexible structure such that a combination of the beam structure, the fiber optic sensors, and the flexible structure has a natural frequency fc defined by (0.95)fs?fc?(1.05)fs.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 26, 2019
    Assignee: United States of America as Represented by the Administrator of NASA
    Inventors: Michael G. Wolf, Jeffrey D. Suhey, James E. Stanley, Edwin D. Griffin, Hector Gutierrez, Daniel Kirk, Gabriel Lapilli, Weihua Su, Natsuki Tsushima, Bartel van der Veek
  • Patent number: 9957872
    Abstract: An abnormality diagnosing apparatus configured to diagnose abnormality of a fuel injection amount of a diesel engine includes: an oxidation catalyst provided in an exhaust gas passage; an exhaust gas temperature detector configured to detect an upstream-side exhaust gas temperature and a downstream-side exhaust gas temperature, the upstream-side exhaust gas temperature being an exhaust gas temperature on an upstream side of the oxidation catalyst, the downstream-side exhaust gas temperature being an exhaust gas temperature on a downstream side of the oxidation catalyst; and an abnormality determining unit configured to determine whether the fuel injection amount is excessive or not on the basis of comparison between the upstream-side exhaust gas temperature and the downstream-side exhaust gas temperature.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: May 1, 2018
    Assignee: Volvo Truck Corporation
    Inventors: Yousuke Aoyama, Yuuji Kamoda, Natsuki Tsushima
  • Publication number: 20160115849
    Abstract: An abnormality diagnosing apparatus configured to diagnose abnormality of a fuel injection amount of a diesel engine includes: an oxidation catalyst provided in an exhaust gas passage; an exhaust gas temperature detector configured to detect an upstream-side exhaust gas temperature and a downstream-side exhaust gas temperature, the upstream-side exhaust gas temperature being an exhaust gas temperature on an upstream side of the oxidation catalyst, the downstream-side exhaust gas temperature being an exhaust gas temperature on a downstream side of the oxidation catalyst; and an abnormality determining unit configured to determine whether the fuel injection amount is excessive or not on the basis of comparison between the upstream-side exhaust gas temperature and the downstream-side exhaust gas temperature.
    Type: Application
    Filed: November 14, 2013
    Publication date: April 28, 2016
    Inventors: Yousuke AOYAMA, Yuuji KAMODA, Natsuki TSUSHIMA