Patents by Inventor Kazuto Seto

Kazuto Seto 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).

  • Absolute displacement detection method and absolute displacement sensor using the method
    Patent number: 8418552
    Abstract: An absolute displacement sensor 1 includes a sensor housing 2 serving as a detection object; a mass body 3 having a mass m which is movably supported by the sensor housing 2 with a spring coefficient k and a damping coefficient c; a detecting means 4 which electrically detects a relative velocity of the sensor housing 2 with respect to the mass body 3; a feedback control means 5 which controls the absolute displacement of the mass body 3 attributable to the absolute displacement of the sensor housing 2 by positively feeding back the relative displacement and by negatively feeding back a relative acceleration obtained by primarily differentiating the relative velocity, respectively; and a phase lag compensation means 6 which performs phase lag compensation with respect to the relative displacement.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: April 16, 2013
    Assignees: Oiles Corporation
    Inventor: Kazuto Seto
  • ABSOLUTE DISPLACEMENT DETECTION METHOD AND ABSOLUTE DISPLACEMENT SENSOR USING THE METHOD
    Publication number: 20110203377
    Abstract: An absolute displacement sensor 1 includes a sensor housing 2 serving as a detection object; a mass body 3 having a mass m which is movably supported by the sensor housing 2 with a spring coefficient k and a damping coefficient c; a detecting means 4 which electrically detects a relative velocity of the sensor housing 2 with respect to the mass body 3; a feedback control means 5 which controls the absolute displacement of the mass body 3 attributable to the absolute displacement of the sensor housing 2 by positively feeding back the relative displacement and by negatively feeding back a relative acceleration obtained by primarily differentiating the relative velocity, respectively; and a phase lag compensation means 6 which performs phase lag compensation with respect to the relative displacement.
    Type: Application
    Filed: August 5, 2008
    Publication date: August 25, 2011
    Inventor: Kazuto Seto