Patents by Inventor Tomohito Yamazaki

Tomohito Yamazaki 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: 10254432
    Abstract: A device can include a housing; external electrodes; circuitry disposed in the housing where the circuitry converts analog signals sensed by the external electrodes to digital signals. Various other apparatuses, systems, methods, etc., are also disclosed.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: April 9, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Nestor H. Cuevas, Herve Denaclara, Tomohito Yamazaki, James Minto, Ryosei Aoki
  • Publication number: 20150369949
    Abstract: A device can include a housing; external electrodes; circuitry disposed in the housing where the circuitry converts analog signals sensed by the external electrodes to digital signals. Various other apparatuses, systems, methods, etc., are also disclosed.
    Type: Application
    Filed: June 24, 2015
    Publication date: December 24, 2015
    Inventors: Nestor H. Cuevas, Herve Denaclara, Tomohito Yamazaki, James Minto, Ryosei Aoki
  • Patent number: 8526013
    Abstract: A batteryless absolute encoder determines the accuracy of absolute position information to be output when electric power is turned on and outputs an alarm signal in the case of abnormality. The batteryless absolute encoder includes an absolute position computing section, an absolute position storing section, and a determining section. The absolute position computing section computes the absolute position of a spindle to be detected, including the number of revolutions of the spindle, based upon detection signals output from four reluctance resolvers. The absolute position storing section stores the absolute position output from the absolute position computing section when electric power is turned off. The determining section compares an absolute position output from the absolute position computing section when electric power is turned on and the stored absolute position and outputs an alarm signal if a difference between the two absolute positions is larger than a predetermined value.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: September 3, 2013
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Kazuhiro Makiuchi, Tomohito Yamazaki, Tooru Miyajima, Shigeharu Katou, Toshiaki Ayuzawa
  • Patent number: 8358124
    Abstract: A magnetic absolute encoder with enhanced resolution is provided. A first cycle determining section 27 utilizes data stored in a fourth angle data storing section 23 to determine in which cycle of m cycles of the fourth angle data, fifth angle data, which has been newly computed in response to rotation of a rotary shaft 1, occurs. A second cycle determining section 29 determines in which cycle of n cycles of first angle data that occur in first determined cycle, the newly computed fifth angle data occurs. A third cycle determining section 31 determines in which cycle of N1 cycles of the first angle data, the current first angle data occurs, based on the first determined cycle and second determined cycle. An absolute position determining section 33 determines the absolute position based on third determined cycle and the digital value of the current first angle data.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: January 22, 2013
    Assignee: Sayno Denki Co., Ltd.
    Inventors: Shigeharu Katou, Kazuhiro Makiuchi, Shoji Ito, Tooru Miyajima, Tomohito Yamazaki, Toshiaki Ayuzawa, Masato Matsuda
  • Publication number: 20110115481
    Abstract: A magnetic absolute encoder with enhanced resolution is provided. A first cycle determining section 27 utilizes data stored in a fourth angle data storing section 23 to determine in which cycle of m cycles of the fourth angle data, fifth angle data, which has been newly computed in response to rotation of a rotary shaft 1, occurs. A second cycle determining section 29 determines in which cycle of n cycles of first angle data that occur in first determined cycle, the newly computed fifth angle data occurs. A third cycle determining section 31 determines in which cycle of N1 cycles of the first angle data, the current first angle data occurs, based on the first determined cycle and second determined cycle. An absolute position determining section 33 determines the absolute position based on third determined cycle and the digital value of the current first angle data.
    Type: Application
    Filed: November 17, 2010
    Publication date: May 19, 2011
    Applicant: SANYO DENKI CO., LTD.
    Inventors: Shigeharu Katou, Kazuhiro Makiuchi, Shoji Ito, Tooru Miyajima, Tomohito Yamazaki, Toshiaki Ayuzawa, Masato Matsuda
  • Publication number: 20110026040
    Abstract: A batteryless absolute encoder determines the accuracy of absolute position information to be output when electric power is turned on and outputs an alarm signal in the case of abnormality. The batteryless absolute encoder includes an absolute position computing section, an absolute position storing section, and a determining section. The absolute position computing section computes the absolute position of a spindle to be detected, including the number of revolutions of the spindle, on the basis of detection signals output from four reluctance resolvers. The absolute position storing section stores the absolute position output from the absolute position computing section when electric power is turned off. The determining section compares an absolute position output from the absolute position computing section when electric power is turned on and the stored absolute position and outputs an alarm signal if a difference between the two absolute positions is larger than a predetermined value.
    Type: Application
    Filed: March 16, 2009
    Publication date: February 3, 2011
    Applicant: SANYO DENKI CO., LTD.
    Inventors: Kazuhiro Makiuchi, Tomohito Yamazaki, Tooru Miyajima, Shigeharu Katou, Toshiaki Ayuzawa