Patents by Inventor Tomohiro Otsuka

Tomohiro Otsuka 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: 9423415
    Abstract: This sensor state determination system is a sensor state monitoring system capable of accurately determining whether or not a detecting sensor used with a railroad vehicle is in an abnormal state. This system includes: a detecting sensor capable of detecting a physical value acting upon the railroad vehicle; and an electronic control device. A monitoring sensor equivalent to the detection sensor is installed at a position equivalent to the position of the detection sensor. The electronic control device is provided with a determination means (coherence calculation section, state determination section) that computes, based on a first signal detected by the detecting sensor and a second signal detected by the monitoring sensor, a coherence value indicating a correlation between the signals. The electronic control device determines that the detecting sensor is in an abnormal state if the coherence value is smaller than a preset abnormality determination value.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: August 23, 2016
    Assignees: NIPPON SHARYO, LTD., CENTRAL JAPAN RAILWAY COMPANY
    Inventors: Koichiro Nanba, Nobuyuki Okada, Takahiro Sasauchi, Tatsuya Mita, Tomohiro Otsuka, Tomonori Goto, Yasuki Nakakura, Naoki Tokuda
  • Publication number: 20140297096
    Abstract: This sensor state determination system is a sensor state monitoring system capable of accurately determining whether or not a detecting sensor used with a railroad vehicle is in an abnormal state. This system includes: a detecting sensor capable of detecting a physical value acting upon the railroad vehicle; and an electronic control device. A monitoring sensor equivalent to the detection sensor is installed at a position equivalent to the position of the detection sensor. The electronic control device is provided with a determination means (coherence calculation section, state determination section) that computes, based on a first signal detected by the detecting sensor and a second signal detected by the monitoring sensor, a coherence value indicating a correlation between the signals. The electronic control device determines that the detecting sensor is in an abnormal state if the coherence value is smaller than a preset abnormality determination value.
    Type: Application
    Filed: February 7, 2012
    Publication date: October 2, 2014
    Applicants: CENTRAL JAPAN RAILWAY COMPANY, NIPPON SHARYO, LTD.
    Inventors: Koichiro Nanba, Nobuyuki Okada, Takahiro Sasauchi, Tatsuya Mita, Tomohiro Otsuka, Tomonori Goto, Yasuki Nakakura, Naoki Tokuda