Patents by Inventor Akira Sawada

Akira Sawada 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: 10146343
    Abstract: The purpose is to provide a terminal device that can be operated by a virtual operation key which is easy to use. The terminal device according to an aspect of the present invention comprises a display unit for displaying a virtual operation key, a touch panel for detecting contact by an inputting object on the virtual operation key, and a control unit for assessing whether a drag operation by the inputting object has been carried out on the basis of contact with the virtual operation key by the inputting object detected via the touch panel and controlling the display position of the virtual operation key, wherein the control unit modifies the display position of the virtual operation key in accordance with the contact position of the inputting object if the contact position of the inputting object exceeds a display area of the virtual operation key due to the drag operation.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: December 4, 2018
    Assignee: GungHo Online Entertainment, Inc.
    Inventor: Akira Sawada
  • Publication number: 20180244158
    Abstract: the control device for electric vehicle in the first embodiment, in the electric vehicle including the motor that functions as the traveling driving source and provides a regenerative braking force to the vehicle, and the friction brakes that provide the friction braking force to the vehicle, detects the motor rotation speed proportionate to a running speed of this electric vehicle, estimates the disturbance torque that acts on the motor, and performs the control such that the motor torque command value converges to the disturbance torque estimated value as the motor rotation speed decreases. Then, when the motor rotation speed becomes almost 0, the control device performs the control such that the friction-braking-amount command value with respect to the friction brakes converges to a value determined on the basis of the disturbance torque estimated value, and causes the motor torque command value to converge to almost 0.
    Type: Application
    Filed: August 10, 2016
    Publication date: August 30, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hiroyuki KOMATSU, Ken ITOU, Takashi NAKAJIMA, Yuuji KATSUMATA, Akira SAWADA
  • Patent number: 10035430
    Abstract: A control device for electric motor vehicle using the motor as the traveling driving source and configured to decelerate by a regenerative braking force from the motor detects the accelerator operation amount, calculates the disturbance torque estimated value, and detects or estimates the resistance component unrelated to the gradient from the vehicle state. The control device for electric motor vehicle corrects the disturbance torque estimated value according to the detected or estimated resistance component unrelated to the gradient. The motor is controlled on the basis of the motor torque command value. When the accelerator operation amount is equal to or less than the predetermined value and the electric motor vehicle is just before the stop of the vehicle, the motor torque command value converges to the corrected disturbance torque estimated value in conjunction with the reduction of the rotation speed of the motor.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: July 31, 2018
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Akira Sawada, Ken Ito, Takashi Nakajima, Yuji Katsumata, Hiroyuki Komatsu
  • Publication number: 20180154797
    Abstract: The control device for the electric vehicle determines whether or not the starting operation of the vehicle has been performed by the driver, calculates the disturbance torque estimated value Td necessary for maintaining the vehicle stop state corresponding to the disturbance acting on the vehicle, and performs a control such that the driving torque of the motor converges to the disturbance torque estimated value Td when the vehicle is determined to be just before stop of the vehicle during running or determined to have undergone the starting operation. Then, the control device for the electric vehicle controls the responsiveness of the driving torque to the disturbance acting on the vehicle, and increases the responsiveness of the driving torque of the motor compared with the responsiveness of the driving torque just before stop of the vehicle when the starting operation is determined to have been performed.
    Type: Application
    Filed: May 26, 2015
    Publication date: June 7, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Akira SAWADA, Ken ITOU, Takashi NAKAJIMA, Yuji KATSUMATA, Hiroyuki KOMATSU
  • Patent number: 9956960
    Abstract: The device that generates the friction braking force to decelerate the vehicle estimates the disturbance torque acting on the vehicle. When the accelerator operation amount is equal to or less than the predetermined value and the vehicle is just before the stop of the vehicle, the control device for vehicle causes the friction braking amount to converge to the friction braking amount to the value decided on the basis of the disturbance torque estimated value Td in conjunction with the reduction in the motor rotation speed (speed parameter) proportionate to the traveling speed of the vehicle.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: May 1, 2018
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Hiroyuki Komatsu, Ken Ito, Takashi Nakajima, Yuji Katsumata, Akira Sawada
  • Patent number: 9919617
    Abstract: A control device for electric motor vehicle using a motor as a traveling drive source and configured to decelerate by a regenerative braking force of the motor includes a motor torque command value setter configured to set a first torque target value for traveling based on the vehicle information as a motor torque command value for traveling based on the vehicle information before a speed parameter proportional to a traveling speed of an electric motor vehicle becomes equal to or less than a predetermined value, and set a second torque target value for stopping the electric motor vehicle and maintaining a vehicle stopped state as the motor torque command value when the speed parameter becomes equal to or less than the predetermined value, a motor controller configured to control the motor on the basis of the motor torque command value.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: March 20, 2018
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Akira Sawada, Ken Ito, Takashi Nakajima, Yuji Katsumata, Hiroyuki Komatsu
  • Publication number: 20180077370
    Abstract: A signal output circuit includes a transistor includes a source that is coupled to a light receiving element and a gate of which electric potential is fixed, a first switch circuit capable of fixing a potential of the source to a reference potential, a second switch circuit coupled to a drain of the transistor, a third switch circuit coupled to the drain, a first capacitor coupled to the drain via the second switch circuit and coupled to the drain via the third switch circuit, wherein a first voltage according to a first current flowing through the transistor via the second switch circuit occurs, and a second voltage according to a second current flowing through the transistor via the third switch circuit occurs, and an output circuit that outputs a first signal corresponding to the first voltage and a second signal corresponding to the second voltage.
    Type: Application
    Filed: August 24, 2017
    Publication date: March 15, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Hironori Nishino, Akira Sawada
  • Patent number: 9902272
    Abstract: A control device for electric motor vehicle is configured to decelerate by a regenerative braking force of the motor when an accelerator operation amount decreases or becomes zero. The control device detects the accelerator operation amount, calculates a motor torque command value, and controls the motor on the basis of the motor torque command value calculated. The control device detects a speed parameter proportional to a traveling speed and calculates a feedback torque for stopping the vehicle on the basis of the speed parameter detected. The control device also estimates a disturbance torque acting on the motor and converges, as the speed parameter is reduced, the motor torque command value to the disturbance torque on the basis of the feedback torque when the accelerator operation amount decreases or becomes zero and the electric motor vehicle stops shortly. The control device adjusts the feedback torque according to the disturbance torque.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: February 27, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akira Sawada, Ken Ito, Takashi Nakajima, Yuji Katsumata, Hiroyuki Komatsu
  • Publication number: 20180043792
    Abstract: A control device for electric motor vehicle using the motor as the traveling driving source and configured to decelerate by a regenerative braking force from the motor detects the accelerator operation amount, calculates the disturbance torque estimated value, and detects or estimates the resistance component unrelated to the gradient from the vehicle state. The control device for electric motor vehicle corrects the disturbance torque estimated value according to the detected or estimated resistance component unrelated to the gradient. The motor is controlled on the basis of the motor torque command value. When the accelerator operation amount is equal to or less than the predetermined value and the electric motor vehicle is just before the stop of the vehicle, the motor torque command value converges to the corrected disturbance torque estimated value in conjunction with the reduction of the rotation speed of the motor.
    Type: Application
    Filed: January 26, 2015
    Publication date: February 15, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Akira SAWADA, Ken ITO, Takashi NAKAJIMA, Yuji KATSUMATA, Hiroyuki KOMATSU
  • Publication number: 20180015840
    Abstract: a control device for electric motor vehicle uses the motor as the traveling driving source. The control device for electric motor vehicle is configured to decelerate by the regenerative braking force from the motor. The control device for electric motor vehicle is configured to detect the amount of the accelerator operation, detect the motor rotation speed proportionate to the traveling speed of the electric motor vehicle, and calculate the motor rotation speed estimated value according to the state of the electric motor vehicle. Additionally, the control device for electric motor vehicle is configured to detect or estimate the resistance component unrelated to the gradient from the vehicle state and correct the motor rotation speed estimated value according to the resistance component.
    Type: Application
    Filed: January 26, 2015
    Publication date: January 18, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Akira SAWADA, Ken ITO, Takashi NAKAJIMA, Yuji KATSUMATA, Hiroyuki KOMATSU
  • Publication number: 20180015925
    Abstract: The device that generates the friction braking force to decelerate the vehicle estimates the disturbance torque acting on the vehicle. When the accelerator operation amount is equal to or less than the predetermined value and the vehicle is just before the stop of the vehicle, the control device for vehicle causes the friction braking amount to converge to the friction braking amount to the value decided on the basis of the disturbance torque estimated value Td in conjunction with the reduction in the motor rotation speed (speed parameter) proportionate to the traveling speed of the vehicle.
    Type: Application
    Filed: January 26, 2015
    Publication date: January 18, 2018
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hiroyuki KOMATSU, Ken ITO, Takashi NAKAJIMA, Yuji KATSUMATA, Akira SAWADA
  • Patent number: 9845022
    Abstract: A control device for electric motor vehicle configured to decelerate by a regenerative braking force of the motor detects an accelerator operation amount, calculates a motor torque command value and controls the motor on the basis of the calculated motor torque command value. Further, a speed parameter proportional to a traveling speed is detected, and a feedback torque for stopping the electric motor vehicle is calculated on the basis of the detected speed parameter. Furthermore, the speed parameter is estimated in accordance with a state of the electric motor vehicle, and a feedforward torque is calculated on the basis of the estimated speed parameter. When accelerator operation amount is not larger than a predetermined value and the electric motor vehicle stops shortly, the motor torque command value is converged to zero on the basis of the feedback torque and the feedforward torque with a reduction in the traveling speed.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: December 19, 2017
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroyuki Komatsu, Ken Ito, Takashi Nakajima, Yuji Katsumata, Akira Sawada
  • Patent number: 9844685
    Abstract: A radiotherapy equipment control device acquires reference position information for a specific location at a reference time. Furthermore, representative point reference position information is generated from reference position information for a plurality of markers at the reference time, and relative position information up to the reference position information for the specific location is generated. Moreover, representative point position information at another time is generated from the position information for a plurality of markers in a subject at the other time, which differs from the reference time. In addition, position information for the specific location at the other time is generated from the representative point position information and the relative position information.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: December 19, 2017
    Assignees: HITACHI, LTD., KYOTO UNIVERSITY
    Inventors: Yasunobu Suzuki, Mitsuhiro Nakamura, Akira Sawada, Masahiro Yamada
  • Publication number: 20160347202
    Abstract: A control device for electric motor vehicle using a motor as a traveling drive source and configured to decelerate by a regenerative braking force of the motor includes a motor torque command value setter configured to set a first torque target value for traveling based on the vehicle information as a motor torque command value for traveling based on the vehicle information before a speed parameter proportional to a traveling speed of an electric motor vehicle becomes equal to or less than a predetermined value, and set a second torque target value for stopping the electric motor vehicle and maintaining a vehicle stopped state as the motor torque command value when the speed parameter becomes equal to or less than the predetermined value, a motor controller configured to control the motor on the basis of the motor torque command value.
    Type: Application
    Filed: January 5, 2015
    Publication date: December 1, 2016
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Akira Sawada, Ken Ito, Takashi Nakajima, Yuji Katsumata, Hiroyuki Komatsu
  • Publication number: 20160297303
    Abstract: A control device for electric motor vehicle is configured to decelerate by a regenerative braking force of the motor when an accelerator operation amount decreases or becomes zero. The control device detects the accelerator operation amount, calculates a motor torque command value, and controls the motor on the basis of the motor torque command value calculated. The control device detects a speed parameter proportional to a traveling speed and calculates a feedback torque for stopping the vehicle on the basis of the speed parameter detected. The control device also estimates a disturbance torque acting on the motor and converges, as the speed parameter is reduced, the motor torque command value to the disturbance torque on the basis of the feedback torque when the accelerator operation amount decreases or becomes zero and the electric motor vehicle stops shortly. The control device adjusts the feedback torque according to the disturbance torque.
    Type: Application
    Filed: December 2, 2013
    Publication date: October 13, 2016
    Inventors: Akira SAWADA, Ken ITO, Takashi NAKAJIMA, Yuji KATSUMATA, Hiroyuki KOMATSU
  • Publication number: 20160297321
    Abstract: A control device for electric motor vehicle configured to decelerate by a regenerative braking force of the motor detects an accelerator operation amount, calculates a motor torque command value and controls the motor on the basis of the calculated motor torque command value. Further, a speed parameter proportional to a traveling speed is detected, and a feedback torque for stopping the electric motor vehicle is calculated on the basis of the detected speed parameter. Furthermore, the speed parameter is estimated in accordance with a state of the electric motor vehicle, and a feedforward torque is calculated on the basis of the estimated speed parameter. When accelerator operation amount is not larger than a predetermined value and the electric motor vehicle stops shortly, the motor torque command value is converged to zero on the basis of the feedback torque and the feedforward torque with a reduction in the traveling speed.
    Type: Application
    Filed: November 20, 2014
    Publication date: October 13, 2016
    Inventors: Hiroyuki Komatsu, Ken Ito, Takashi Nakajima, Yuji Katsumata, Akira Sawada
  • Patent number: 9463936
    Abstract: A sorting system is provided with conveying section, distance detecting section, article detecting section, determining section, acquisition section, and sorting section. The conveying section conveys an article. The distance detecting section acquires distance data indicating a distance, from above the conveying section, from the distance detecting section to an object included in a detection area including an area through which the article conveyed by the conveying section passes. The article detecting section detects one or a plurality of the articles based on the distance data. The determining section determines, when a plurality of the articles are detected, whether a plurality of the articles are sortable. The acquisition section acquires sorting information of the article.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: October 11, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaya Maeda, Yuka Watanabe, Tomoyuki Hamamura, Bunpei Irie, Akira Sawada, Kenji Baba
  • Patent number: 9461578
    Abstract: A motor control device of a vehicle includes a motor and a lock mechanism for locking the rotation of vehicle wheels. The motor control device includes a detection device for detecting release of the lock mechanism, a damping control device for suppressing torsional vibration of a drive shaft, and a current control device for controlling current flowing to the motor on the basis of a motor torque command value set by the damping control device. The current control device channels an excitation current for generating a magnetic flux in the motor on the basis of the detection result of the detection device.
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: October 4, 2016
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yuji Katsumata, Ken Ito, Takashi Nakajima, Akira Sawada, Shou Oono, Hiroyuki Komatsu
  • Publication number: 20160120494
    Abstract: A radiograph analysis device is configured to detect a marker area from a radiograph obtained by imaging a specimen in which a marker is embedded, and the radiograph analysis device includes a brightness relation information acquisition unit configured to acquire brightness relation information generated based on information related to a quantity of radiation and showing a relation between a brightness of the marker area and a brightness of a reference portion assumed to be a portion other than the marker, a reference brightness acquisition unit configured to acquire the brightness of the reference portion, and a marker area detection unit configured to detect the marker area based on the brightness relation information acquired by the brightness relation information acquisition unit and the brightness of the reference portion acquired by the reference brightness acquisition unit.
    Type: Application
    Filed: May 19, 2014
    Publication date: May 5, 2016
    Inventors: Kunio TAKAHASHI, Masahiro YAMADA, Akira SAWADA
  • Patent number: 9308109
    Abstract: The stent graft delivery device includes a shaft on which the stent graft is placed on the distal side; a sheath which is slidable outside of the shaft; a handle which is provided on the proximal side of the shaft and the sheath; and an operation unit which is provided with a switch mechanism. When a rotating member is rotated, while in a state of pressing a switch member of the switch mechanism inward, the sheath moves backward and the shaft moves forward using the handle as a reference.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: April 12, 2016
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Kazuyoshi Tani, Akira Sawada