Patents by Inventor Ryosaku Kaji

Ryosaku Kaji 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: 8508219
    Abstract: There is provided an apparatus and method for identifying and measuring the electric field strength which occurs from each of RFID tags arranged in a detection target space by a receiver to grasp the state of an object. The apparatus is provided with m (m>=1) electromagnetic field generation means provided near a space, the space being occupied by the object when the object is in a particular state; n (n>=1) electric field strength measurement means for identifying and measuring electric field strength which occurs from each of the m electromagnetic field generation means; characteristic extraction means for calculating characteristics from m×n time-series data of the electric field strength; and state identification means for identifying, by statistical processing, a state from the characteristics and characteristic data in each state for learning.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: August 13, 2013
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Ryosaku Kaji, Mitsuaki Shimizu, Kiyomi Hirota
  • Publication number: 20100019759
    Abstract: There is provided an apparatus and method for identifying and measuring the electric field strength which occurs from each of RFID tags arranged in a detection target space by a receiver to grasp the state of an object. The apparatus is provided with m (m>=1) electromagnetic field generation means provided near a space, the space being occupied by the object when the object is in a particular state; n (n>=1) electric field strength measurement means for identifying and measuring electric field strength which occurs from each of the m electromagnetic field generation means; characteristic extraction means for calculating characteristics from m×n time-series data of the electric field strength; and state identification means for identifying, by statistical processing, a state from the characteristics and characteristic data in each state for learning.
    Type: Application
    Filed: April 28, 2009
    Publication date: January 28, 2010
    Applicant: National Institute of Advanced Industrial Science and Technology
    Inventors: Ryosaku Kaji, Mitsuaki Shimizu, Kiyomi Hirota
  • Publication number: 20070132582
    Abstract: The present invention provides a mobile object detection method, and a mobile object detection system, that allow detecting the movement of an object based on measurements of the electric field intensity generated by transmitters such as IC tags, while curbing implementation costs. Movement of the object is detected by measuring electric field intensity generated by a plurality of transmitters arranged in a detection space, obtaining a difference between the electric field intensity and an average value of the electric field intensity in a state where an object in the detection space is not moving, and detecting the movement of the object when the difference is equal to or larger than a threshold value based on a standard deviation of the electric field intensity in a state where the object in the detection space is not moving.
    Type: Application
    Filed: December 11, 2006
    Publication date: June 14, 2007
    Applicant: National Institute of Advanced Industrial Science and Technology
    Inventors: Ryosaku Kaji, Hideo Itoh