Patents by Inventor Shigenori SASAI

Shigenori SASAI 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: 10411564
    Abstract: A robot includes a driving unit, a flexible board including a power line that transmits electric power to the driving unit, and a choke coil connected to the power line. A band rejection filter is formed by parasitic capacitance, which is formed by the electric line, and the choke coil.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: September 10, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Takema Yamazaki, Izumi Iida, Shigenori Sasai
  • Patent number: 9975240
    Abstract: A robot includes a robot arm, a drive unit that drives the robot arm, a first control unit that controls drive of the drive unit, a plurality of detection units at least one of which is an angular velocity sensor as an inertial sensor, and a wiring unit that series-connects the plurality of detection units and the first control unit.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: May 22, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Takema Yamazaki, Izumi Iida, Munenori Sawada, Daisuke Sato, Isamu Sejimo, Shigenori Sasai
  • Publication number: 20160279795
    Abstract: A robotic device having an arm including an actuator and inertial sensor, a first calculator adapted to calculate an angular velocity and an angular acceleration of the actuator based on a rotational angle data from an angle sensor, a second calculator adapted to calculate one of an angular velocity and an angular acceleration of the arm based on an output detected by the inertial sensor, and a comparator adapted to compare one of the angular velocity and the angular acceleration calculated by the first calculator and one of the angular velocity and the angular acceleration calculated by the second calculator with each other, and it is determined that the inertial sensor is at fault if an absolute value of the difference between the actuator and the arm in one of the angular velocity and the angular acceleration in the comparison section is larger than a threshold value.
    Type: Application
    Filed: June 7, 2016
    Publication date: September 29, 2016
    Inventor: Shigenori SASAI
  • Patent number: 9403274
    Abstract: A robotic device having an arm including an actuator and inertial sensor, a first calculator adapted to calculate an angular velocity and an angular acceleration of the actuator based on a rotational angle data from an angle sensor, a second calculator adapted to calculate one of an angular velocity and an angular acceleration of the arm based on an output detected by the inertial sensor, and a comparator adapted to compare one of the angular velocity and the angular acceleration calculated by the first calculator and one of the angular velocity and the angular acceleration calculated by the second calculator with each other, and it is determined that the inertial sensor is at fault if an absolute value of the difference between the actuator and the arm in one of the angular velocity and the angular acceleration in the comparison section is larger than a threshold value.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: August 2, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Shigenori Sasai
  • Publication number: 20160118866
    Abstract: A robot includes a driving unit, a flexible board including a power line that transmits electric power to the driving unit, and a choke coil connected to the power line. A band rejection filter is formed by parasitic capacitance, which is formed by the electric line, and the choke coil.
    Type: Application
    Filed: October 21, 2015
    Publication date: April 28, 2016
    Inventors: Takema YAMAZAKI, Izumi IIDA, Shigenori SASAI
  • Publication number: 20150127147
    Abstract: A robot includes a robot arm, a drive unit that drives the robot arm, a first control unit that controls drive of the drive unit, a plurality of detection units at least one of which is an angular velocity sensor as an inertial sensor, and a wiring unit that series-connects the plurality of detection units and the first control unit.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 7, 2015
    Inventors: Takema YAMAZAKI, Izumi IIDA, Munenori SAWADA, Daisuke SATO, Isamu SEJIMO, Shigenori SASAI
  • Publication number: 20140121832
    Abstract: A robotic device having an arm including an actuator and inertial sensor, a first calculator adapted to calculate an angular velocity and an angular acceleration of the actuator based on a rotational angle data from an angle sensor, a second calculator adapted to calculate one of an angular velocity and an angular acceleration of the arm based on an output detected by the inertial sensor, and a comparator adapted to compare one of the angular velocity and the angular acceleration calculated by the first calculator and one of the angular velocity and the angular acceleration calculated by the second calculator with each other, and it is determined that the inertial sensor is at fault if an absolute value of the difference between the actuator and the arm in one of the angular velocity and the angular acceleration in the comparison section is larger than a threshold value.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Applicant: Seiko Epson Corporation
    Inventor: Shigenori SASAI
  • Patent number: 8649904
    Abstract: A robotic device having an arm including an actuator and inertial sensor, a first calculator adapted to calculate an angular velocity and an angular acceleration of the actuator based on a rotational angle data from an angle sensor, a second calculator adapted to calculate one of an angular velocity and an angular acceleration of the arm based on an output detected by the inertial sensor, and a comparator adapted to compare one of the angular velocity and the angular acceleration calculated by the first calculator and one of the angular velocity and the angular acceleration calculated by the second calculator with each other, and it is determined that the inertial sensor is at fault if an absolute value of the difference between the actuator and the arm in one of the angular velocity and the angular acceleration in the comparison section is larger than a threshold value.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: February 11, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Shigenori Sasai
  • Patent number: 8538582
    Abstract: A robot includes: an arm driven by a motor; an angle sensor that detects a pivoting angle of the motor; an inertia sensor that detects an inertial force acting on the arm; a noise detecting unit that detects a noise frequency of the inertia sensor from both an output of the angle sensor and an output of the inertia sensor; a filter-constant determining unit that determines a characteristic of a filter from information of the noise detecting unit; and the filter that removes noise of the inertia sensor on the basis of the filter-constant determining unit.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: September 17, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Shigenori Sasai
  • Publication number: 20120179294
    Abstract: A robot includes: an arm driven by a motor; an angle sensor that detects a pivoting angle of the motor; an inertia sensor that detects an inertial force acting on the arm; a noise detecting unit that detects a noise frequency of the inertia sensor from both an output of the angle sensor and an output of the inertia sensor; a filter-constant determining unit that determines a characteristic of a filter from information of the noise detecting unit; and the filter that removes noise of the inertia sensor on the basis of the filter-constant determining unit.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 12, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shigenori Sasai
  • Publication number: 20120010748
    Abstract: A robotic device having an arm including an actuator and inertial sensor, a first calculator adapted to calculate an angular velocity and an angular acceleration of the actuator based on a rotational angle data from an angle sensor, a second calculator adapted to calculate one of an angular velocity and an angular acceleration of the arm based on an output detected by the inertial sensor, and a comparator adapted to compare one of the angular velocity and the angular acceleration calculated by the first calculator and one of the angular velocity and the angular acceleration calculated by the second calculator with each other, and it is determined that the inertial sensor is at fault if an absolute value of the difference between the actuator and the arm in one of the angular velocity and the angular acceleration in the comparison section is larger than a threshold value.
    Type: Application
    Filed: July 11, 2011
    Publication date: January 12, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shigenori SASAI