Patents by Inventor Yusuke Sone

Yusuke Sone 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).

  • Acoustic measurement device and acoustic measurement method
    Patent number: 8107061
    Abstract: In a schlieren optical system, a laser beam is passed through the jet flow and the ambient around the jet flow, and a high speed sampling is performed using a high speed photo sensor while displacing measurement points. The value obtained by sampling represents a result of the optical path caused curved by a density gradient generated in an arc-shape from the center of the jet flow. The value is subjected to a high speed discrete Fourier transform and decomposed into frequency components which constitute the noise. Thereafter, Abel inversion is performed on data belonging to a particular frequency to obtain a density gradient in the radial direction from the center of the jet flow. The obtained density gradient is visualized in a graph display, so that the position of the sound source and the state of the jet flow can be accurately grasped.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: January 31, 2012
    Assignees: National University Corporation Gunma University, Japan Aerospace Exploration Agency
    Inventors: Mikiya Araki, Yusuke Sone, Takayuki Kojima, Hideyuki Taguchi, Seiichi Shiga, Tomio Obokata
  • ACOUSTIC MEASUREMENT DEVICE AND ACOUSTIC MEASUREMENT METHOD
    Publication number: 20100162819
    Abstract: In a schlieren optical system, a laser beam is passed through the jet flow and the ambient around the jet flow, and a high speed sampling is performed using a high speed photo sensor while displacing measurement points. The value obtained by sampling represents a result of the optical path caused curved by a density gradient generated in an arc-shape from the center of the jet flow. The value is subjected to a high speed discrete Fourier transform and decomposed into frequency components which constitute the noise. Thereafter, Abel inversion is performed on data belonging to a particular frequency to obtain a density gradient in the radial direction from the center of the jet flow. The obtained density gradient is visualized in a graph display, so that the position of the sound source and the state of the jet flow can be accurately grasped.
    Type: Application
    Filed: January 8, 2010
    Publication date: July 1, 2010
    Applicants: National University Corporation Gunma University, Japan Aerospace Exploration Agency
    Inventors: Mikiya Araki, Yusuke Sone, Takayuki Kojima, Hideyuki Taguchi, Seiichi Shiga, Tomio Obokata