Patents by Inventor Hiroaki Hirai

Hiroaki Hirai 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).

  • Publication number: 20240113793
    Abstract: A purely-lateral position estimation unit (1603) estimates as an estimated purely-lateral position, when a disturbance wave to disturb communication performed in a train is generated while the train is traveling, a position existing in a purely-lateral direction with respect to a position of a generation source of the disturbance wave. A feature extraction unit (1604) extracts a feature of a measured reception power value being a reception power value measured in the train during a disturbance wave generation period wherein the disturbance wave has been generated.
    Type: Application
    Filed: December 11, 2023
    Publication date: April 4, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takuya MIURA, Hiroaki HIRAI, Toshiyuki KURIYAMA, Kosuke SHIMMYO, Katsuhiro KONDO
  • Patent number: 11882133
    Abstract: A list-type detection unit (220) performs list-type detection on communication data so as to detect a fraudulent communication. A machine-learning-type detection unit (230) performs machine-learning-type detection on communication data so as to detect a fraudulent communication. A communication acceptance unit (210) receives communication data from a network, and allocates the received communication data to at least one of the list-type detection unit and the machine-learning-type detection unit, using an allocation filter. A filter setting unit (250) determines a parameter value based on a load status of the list-type detection unit and a load status of the machine-learning-type detection unit, and sets the determined parameter value in the allocation filter.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: January 23, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroaki Hirai, Koji Sato
  • Patent number: 11382533
    Abstract: A motion analyzing device includes a myogenic potential measuring unit (20) and a myogenic potential measurement processor (101) to measure the muscle activity of a person who performs a motion and a motion measuring unit (30) and a position measurement processor (102) to measure the body motion. The motion analyzing device also includes an AA muscle co-activation ratio calculating unit (103), a muscle synergy calculating unit (104) and an equilibrium point calculating unit (105) to calculate an equilibrium point of the person and a muscle synergy that is a set of base vectors describing the equilibrium point based on a musculoskeletal model of the person and a constraint condition that the position of the endpoint of the limb matches the position of the equilibrium point in a static situation to keep a posture still under gravity compensation.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: July 12, 2022
    Assignee: Osaka University
    Inventors: Hiroaki Hirai, Fumiaki Yoshikawa, Eichi Watanabe, Yuma Nagakawa, Akira Kuroiwa, Mitsunori Uemura, Fumio Miyazaki
  • Publication number: 20220141238
    Abstract: A list-type detection unit (220) performs list-type detection on communication data so as to detect a fraudulent communication. A machine-learning-type detection unit (230) performs machine-learning-type detection on communication data so as to detect a fraudulent communication. A communication acceptance unit (210) receives communication data from a network, and allocates the received communication data to at least one of the list-type detection unit and the machine-learning-type detection unit, using an allocation filter. A filter setting unit (250) determines a parameter value based on a load status of the list-type detection unit and a load status of the machine-learning-type detection unit, and sets the determined parameter value in the allocation filter.
    Type: Application
    Filed: November 24, 2021
    Publication date: May 5, 2022
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroaki HIRAI, Koji SATO
  • Publication number: 20210290108
    Abstract: A motion analyzing device includes a myogenic potential measuring unit (20) and a myogenic potential measurement processor (101) to measure the muscle activity of a person who performs a motion and a motion measuring unit (30) and a position measurement processor (102) to measure the body motion. The motion analyzing device also includes an AA muscle co-activation ratio calculating unit (103), a muscle synergy calculating unit (104) and an equilibrium point calculating unit (105) to calculate an equilibrium point of the person and a muscle synergy that is a set of base vectors describing the equilibrium point based on a musculoskeletal model of the person and a constraint condition that the position of the endpoint of the limb matches the position of the equilibrium point in a static situation to keep a posture still under gravity compensation.
    Type: Application
    Filed: September 6, 2017
    Publication date: September 23, 2021
    Inventors: Hiroaki HIRAI, Fumiaki YOSHIKAWA, Eichi WATANABE, Yuma NAGAKAWA, Akira KUROIWA, Mitsunori UEMURA, Fumio MIYAZAKI
  • Patent number: 10691394
    Abstract: A video delivery apparatus includes: a division unit to divide video information corresponding to one screen, which is to be delivered to each of multiple display modules constituting a display, into pieces of video information each corresponding to the number of output lines, which is N times (N is an integer of one or greater) a line indicating pixels per one line of the corresponding display module, and output the pieces of video information corresponding to the number of output lines for each of the multiple display modules; and a delivery processor to deliver the video information corresponding to one screen of the display by repetitively delivering, to the multiple display modules, delivery data obtained by multiplexing the pieces of video information corresponding to the number of output lines of the respective multiple display modules, output from the division unit, and control information indicating the target display modules to which the pieces of video information corresponding to the number of out
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: June 23, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroaki Hirai, Yasunori Hoshihara, Kiyotaka Kato
  • Patent number: 10631751
    Abstract: In order to estimate a movement command that a central nervous system is to select to implement a desired movement based on three feature amounts under the concepts of an antagonistic muscle ratio and an antagonistic muscle sum and based on a musculoskeletal model, a movement analysis apparatus includes: a myoelectric potential measurement unit to measure a myoelectric potential of a person who performs a movement; a movement measurement unit to measure a body movement; and a stiffness-ellipse calculation unit, an equilibrium-point calculation unit and a muscle synergy calculation unit to calculate, from measurement information obtained at the measurement units, feature amounts of a stiffness ellipse, an equilibrium point, and a muscle synergy that are base vectors describing the equilibrium point at an operating point based on a musculoskeletal model.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: April 28, 2020
    Assignee: Osaka University
    Inventors: Fumio Miyazaki, Hiroaki Hirai, Mitsunori Uemura, Kanna Uno, Takanori Oku
  • Patent number: 10589810
    Abstract: A walking robot (1) includes a body (20) joined with an upper part of two legs (10) so that the body has a changeable posture relative to the legs; and a posture control unit (105, 106, 107) configured to control a posture of the body stably in accordance with states of the legs (10) and the body (20). The walking robot includes: a state calculation unit (101, 102, 103) configured to calculate periodically, from angular information on the legs (10) and the body (20), angular momentum p1 around a lower end of the leg in a stance phase and integral pI1 of the angular momentum; and a stabilization determination unit (104) configured to determine whether the calculated angular momentum p1 and integral pI1 are approaching or getting away from target values, and output a result of the determination to the posture control unit (105, 106, 107).
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: March 17, 2020
    Assignee: OSAKA UNIVERSITY
    Inventors: Mitsunori Uemura, Fumio Miyazaki, Hiroaki Hirai
  • Patent number: 10434029
    Abstract: A walking assistance apparatus includes: a walking assistance attachment to be attached to a leg of a human body and including a variable stiffness mechanism having stiffness that is changeable in a direction where the human bends and stretches the knee by motor driving; and a controller. The controller includes a foot-end motion calculation part configured to receive an output from a sensor to detect motion of a leg and successively calculate a relative velocity of a foot end with reference to a waist of the human body; and a leg state determination part configured to determine shift timing between a swing phase and a stance phase based on the relative velocity of the foot end.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: October 8, 2019
    Assignee: Osaka University
    Inventors: Mitsunori Uemura, Fumio Miyazaki, Hiroaki Hirai
  • Publication number: 20180329668
    Abstract: A video delivery apparatus includes: a division unit to divide video information corresponding to one screen, which is to be delivered to each of multiple display modules constituting a display, into pieces of video information each corresponding to the number of output lines, which is N times (N is an integer of one or greater) a line indicating pixels per one line of the corresponding display module, and output the pieces of video information corresponding to the number of output lines for each of the multiple display modules; and a delivery processor to deliver the video information corresponding to one screen of the display by repetitively delivering, to the multiple display modules, delivery data obtained by multiplexing the pieces of video information corresponding to the number of output lines of the respective multiple display modules, output from the division unit, and control information indicating the target display modules to which the pieces of video information corresponding to the number of out
    Type: Application
    Filed: January 7, 2016
    Publication date: November 15, 2018
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroaki HIRAI, Yasunori HOSHIHARA, Kiyotaka KATO
  • Publication number: 20180177667
    Abstract: A walking assistance apparatus includes: a walking assistance attachment to be attached to a leg of a human body and including a variable stiffness mechanism having stiffness that is changeable in a direction where the human bends and stretches the knee by motor driving; and a controller. The controller includes a foot-end motion calculation part configured to receive an output from a sensor to detect motion of a leg and successively calculate a relative velocity of a foot end with reference to a waist of the human body; and a leg state determination part configured to determine shift timing between a swing phase and a stance phase based on the relative velocity of the foot end.
    Type: Application
    Filed: June 23, 2015
    Publication date: June 28, 2018
    Inventors: Mitsunori UEMURA, Fumio MIYAZAKI, Hiroaki HIRAI
  • Publication number: 20180093725
    Abstract: A walking robot (1) includes a body (20) joined with an upper part of two legs (10) so that the body has a changeable posture relative to the legs; and a posture control unit (105, 106, 107) configured to control a posture of the body stably in accordance with states of the legs (10) and the body (20). The walking robot includes: a state calculation unit (101, 102, 103) configured to calculate periodically, from angular information on the legs (10) and the body (20), angular momentum p1 around a lower end of the leg in a stance phase and integral pI1 of the angular momentum; and a stabilization determination unit (104) configured to determine whether the calculated angular momentum p1 and integral pI1 are approaching or getting away from target values, and output a result of the determination to the posture control unit (105, 106, 107).
    Type: Application
    Filed: April 1, 2016
    Publication date: April 5, 2018
    Inventors: Mitsunori UEMURA, Fumio MIYAZAKI, Hiroaki HIRAI
  • Patent number: 9814052
    Abstract: A data distribution server and terminals measure a communication status with other devices. Based on measurement results of the communication status, the data distribution server categorizes the terminals as “trunk” or “branch”, notifies the terminals of categorization results, notifies the terminals of selection of a relay path through which data can be distributed to all relay terminals by relaying the data between “trunks”, and instructs a “trunk” terminal to relay the data through the relay path. When notified that the terminal itself is a “trunk”, each of the terminals relays the data based on an instruction from the data distribution server. When notified by the data distribution server that the terminal itself is a “branch”, each of the terminals receives the data distributed from the data distribution server or the “trunk”.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: November 7, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hiroaki Hirai
  • Publication number: 20170273096
    Abstract: To provide a wireless communication device that can reduce the influence of periodic noises in fixed period communication using wireless communication. A wireless master device (N201) serving as a wireless master station for performing wireless communication with a wireless slave device (N301) serving as a wireless slave station includes a delay control portion (14) configured to set a delay time onto an input signal at random in every transmission period, and a wireless transmission portion (13) configured to transmit the signal to the wireless slave station (N301), while delaying the signal based on the delay time.
    Type: Application
    Filed: December 21, 2015
    Publication date: September 21, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Hiroaki HIRAI
  • Publication number: 20160324436
    Abstract: In order to estimate a movement command that a central nervous system is to select to implement a desired movement based on three feature amounts under the concepts of an antagonistic muscle ratio and an antagonistic muscle sum and based on a musculoskeletal model, a movement analysis apparatus includes: a myoelectric potential measurement unit to measure a myoelectric potential of a person who performs a movement; a movement measurement unit to measure a body movement; and a stiffness-ellipse calculation unit, an equilibrium-point calculation unit and a muscle synergy calculation unit to calculate, from measurement information obtained at the measurement units, feature amounts of a stiffness ellipse, an equilibrium point, and a muscle synergy that are base vectors describing the equilibrium point at an operating point based on a musculoskeletal model.
    Type: Application
    Filed: November 20, 2014
    Publication date: November 10, 2016
    Applicant: Osaka University
    Inventors: Fumio MIYAZAKI, Hiroaki HIRAI, Mitsunori UEMURA, Kanna UNO, Takanori OKU
  • Patent number: 9271122
    Abstract: A content delivery system which comprises a delivery server and multiple terminal devices, the delivery server delivering content, the multiple terminal devices receiving delivery of the content, in the content delivery system connection between the delivery server and the terminal devices and connection between the terminal devices being made by radio, in the content delivery system the terminal devices being connected in multiple stages, wherein the delivery server instructs a terminal device which has received delivery of the content and which is connected to an other terminal device at the next stage to deliver content possessed by a self terminal device to the other terminal device, and wherein the instructed terminal device delivers content possessed by the self terminal device to the other terminal device and notifies the delivery result to the delivery server.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: February 23, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hiroaki Hirai
  • Publication number: 20160021668
    Abstract: A data distribution server and terminals measure a communication status with other devices. Based on measurement results of the communication status, the data distribution server categorizes the terminals as “trunk” or “branch”, notifies the terminals of categorization results, notifies the terminals of selection of a relay path through which data can be distributed to all relay terminals by relaying the data between “trunks”, and instructs a “trunk” terminal to relay the data through the relay path. When notified that the terminal itself is a “trunk”, each of the terminals relays the data based on an instruction from the data distribution server. When notified by the data distribution server that the terminal itself is a “branch”, each of the terminals receives the data distributed from the data distribution server or the “trunk”.
    Type: Application
    Filed: June 4, 2013
    Publication date: January 21, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Hiroaki HIRAI
  • Patent number: 9078585
    Abstract: Disclosed is a muscle synergy analysis which comprises detecting a myoelectric signal generated at each muscle of an antagonistic muscle pair group of a subject; calculating, as time-series data, an antagonistic muscle ratio of an antagonistic muscle pair at a myoelectric signal level from a myoelectric signal detected during a predetermined motion by the subject; and conducting multi variate analysis using the antagonistic muscle ratio at each time of the time-series data as a variable to calculate a principal component including at least a first principal component having high contribution to correlation.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: July 14, 2015
    Assignee: Osaka University
    Inventors: Fumio Miyazaki, Hiroaki Hirai, Syohei Kawagoe, Kazuhiro Matsui, Takayuki Nakano
  • Patent number: 8676239
    Abstract: A wireless communication system including a master station, and slave stations that execute a predetermined operation based on an operation instruction transmitted by the master station, in which the master station includes a normal frame processor that generates an operation instruction, and a Go/Stop signal processor that generates an execution instruction signal instructing to execute the operation instruction to transmit the signal when a response to the operation instruction is obtained from all the slave stations during a predetermined response waiting time, each of the slave stations include an execution-instruction-signal receiving unit that receives the execution instruction signal, and the execution-instruction-signal receiving unit executes an operation corresponding to the execution instruction signal when receiving the execution instruction signal or waits execution of the corresponding operation until the execution instruction signal corresponding to the operation instruction is received.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: March 18, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hiroaki Hirai
  • Publication number: 20140016530
    Abstract: A content delivery system which comprises a delivery server and multiple terminal devices, the delivery server delivering content, the multiple terminal devices receiving delivery of the content, in the content delivery system connection between the delivery server and the terminal devices and connection between the terminal devices being made by radio, in the content delivery system the terminal devices being connected in multiple stages, wherein the delivery server instructs a terminal device which has received delivery of the content and which is connected to an other terminal device at the next stage to deliver content possessed by a self terminal device to the other terminal device, and wherein the instructed terminal device delivers content possessed by the self terminal device to the other terminal device and notifies the delivery result to the delivery server.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 16, 2014
    Inventor: Hiroaki HIRAI