Patents by Inventor Jirou Muraoka

Jirou Muraoka 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).

  • Encoder, servo unit, and method including calculating position data
    Patent number: 8775117
    Abstract: An encoder includes a detector, a first position data calculator, a first data converter, an approximation device and a third position data calculator. The first data converter is configured to convert a first position data calculated by the first position data calculator into second position data whose second width in bits is longer than a first width in bits of the first position data. The approximation device is configured to calculate an approximation function that derives position data when timing data is input, based on a plurality of the second position data converted by the first data converter at a plurality of successive sampling timings, respectively. The third position data calculator is configured to calculate third position data indicating a position of a detection target at an output timing, based on the approximation function calculated by the approximation device.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: July 8, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Hironobu Yoshitake, Jirou Muraoka
  • ENCODER, SERVO UNIT, AND POSITION DATA CALCULATING METHOD
    Publication number: 20120116715
    Abstract: An encoder includes a detector, a first position data calculator, a first data converter, an approximation device and a third position data calculator. The first data converter is configured to convert a first position data calculated by the first position data calculator into second position data whose second width in bits is longer than a first width in bits of the first position data. The approximation device is configured to calculate an approximation function that derives position data when timing data is input, based on a plurality of the second position data converted by the first data converter at a plurality of successive sampling timings, respectively. The third position data calculator is configured to calculate third position data indicating a position of a detection target at an output timing, based on the approximation function calculated by the approximation device.
    Type: Application
    Filed: September 22, 2011
    Publication date: May 10, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Hironobu Yoshitake, Jirou Muraoka