Patents by Inventor Masaki Matsushita

Masaki Matsushita 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: 11203357
    Abstract: A vehicle automated driving system 100 comprises a surrounding environment information acquiring device 10, a vehicle information acquiring device 20, a driver information acquiring device 30, a package selecting part 90, a package proposing part 91, an automated driving executing part 92, and a rejection count detecting part 93. The package selecting part determines the driving assistance package based on at least one of the surrounding environment information, the vehicle information, and the driver information, selects the determined driving assistance package if the rejection count of the determined driving assistance package is less than a predetermined threshold value, and selects a driving assistance package different from the determined driving assistance package if the rejection count of the determined driving assistance package is the threshold value or more.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: December 21, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
  • Patent number: 11150072
    Abstract: There is provided a displacement measuring device that minimize unnecessary power consumption and improves power efficiency. A displacement measuring device includes a main scale and a detection head that is provided in such a manner as to be relatively displaceable to the main scale and outputs a periodic signal having a phase to be changed according to relative displacement to the main scale. The detection head outputs, as the periodic signal, a coarse scale signal having a coarse period and a fine scale signal having a fine period. A coarse phase detector calculates, from two pieces of phase information acquired from the coarse scale signal, the average phase of the coarse scale signal. A fine phase detector calculates, from four pieces of phase information acquired from the fine scale signal, the average phase of the fine scale signal.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: October 19, 2021
    Assignee: MITUTOYO CORPORATION
    Inventors: Masaki Matsushita, Satoshi Adachi
  • Publication number: 20210102796
    Abstract: There is provided a displacement measuring device that minimize unnecessary power consumption and improves power efficiency. A displacement measuring device includes a main scale and a detection head that is provided in such a manner as to be relatively displaceable to the main scale and outputs a periodic signal having a phase to be changed according to relative displacement to the main scale. The detection head outputs, as the periodic signal, a coarse scale signal having a coarse period and a fine scale signal having a fine period. A coarse phase detector calculates, from two pieces of phase information acquired from the coarse scale signal, the average phase of the coarse scale signal. A fine phase detector calculates, from four pieces of phase information acquired from the fine scale signal, the average phase of the fine scale signal.
    Type: Application
    Filed: October 5, 2020
    Publication date: April 8, 2021
    Inventors: Masaki Matsushita, Satoshi Adachi
  • Patent number: 10520336
    Abstract: The displacement detector is configured to receive a transmission signal output from a transmission signal output unit by a reception electrode disposed in a detection head to detect a displacement between the detection head and a scale based on the received signal. The transmission signal is transmitted from a transmission electrode disposed in the detection head to the reception electrode through a coupling electrode disposed in the scale. Phase adjustment units generates a signal whose phase is adjusted from the transmission signal output from the transmission signal output unit. An amplitude adjustment unit adjusts an amplitude of the signal whose phase is adjusted by the phase adjustment unit to generate a crosstalk correction signal. A demodulation unit samples a signal generated by synthesizing the crosstalk correction signal and the received signal and to demodulate the sampled signal.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: December 31, 2019
    Assignee: MITUTOYO CORPORATION
    Inventors: Osamu Kawatoko, Masaki Matsushita
  • Patent number: 10040475
    Abstract: A malfunction detection device for a resolver detects malfunction in a resolver with accuracy and stability even if a value of a square sum is varied between inside and outside of a normal range. When the resolver is in malfunction, a sine signal and a cosine signal are read. It is determined whether a malfunction determination of the resolver is prohibited, or not, from read values of the sine signal and the cosine signal, or square values thereof. When it is determined that the malfunction determination of the resolver is prohibited, the count value is accumulated and incremented every time the test value falls outside a normal range. When the count value arrives at a given value or higher, it is determined that the resolver is in malfunction.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: August 7, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shunichi Wada, Takayuki Yamamoto, Ryoichi Yonezawa, Masaki Matsushita, Katsuya Ikemoto
  • Publication number: 20180216971
    Abstract: The displacement detector is configured to receive a transmission signal output from a transmission signal output unit by a reception electrode disposed in a detection head to detect a displacement between the detection head and a scale based on the received signal. The transmission signal is transmitted from a transmission electrode disposed in the detection head to the reception electrode through a coupling electrode disposed in the scale. Phase adjustment units generates a signal whose phase is adjusted from the transmission signal output from the transmission signal output unit. An amplitude adjustment unit adjusts an amplitude of the signal whose phase is adjusted by the phase adjustment unit to generate a crosstalk correction signal. A demodulation unit samples a signal generated by synthesizing the crosstalk correction signal and the received signal and to demodulate the sampled signal.
    Type: Application
    Filed: January 12, 2018
    Publication date: August 2, 2018
    Inventors: Osamu Kawatoko, Masaki Matsushita
  • Patent number: 9981684
    Abstract: A vehicle steering control apparatus includes a power-supply supply portion 101 supplying a power supply to a micro-controller 102, an inverter 104 supplying power to drive a motor 5, a gate driver 103 controlling the inverter 104, a motor relay 105 opening and closing a current-passing path between the inverter 104 and the motor 5, a motor relay driver 106 controlling the motor relay 105, and a monitoring control portion A 108a and a monitoring control portion B 108b monitoring a power-supply voltage of the power-supply supply portion 101. Because multiple monitoring control portions are included, even in the event of an inconvenience in either one of the monitoring control portions A 108a and B 108b, the motor 5 can be stopped quickly in a reliable manner when the power-supply voltage goes out of a normal operation range.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: May 29, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Matsushita, Takayuki Kifuku, Hiroyuki Kozuki, Masatoshi Saito, Yu Kawano
  • Patent number: 9540037
    Abstract: A malfunction detection device for a resolver detects malfunction in a resolver with accuracy and stability even if a value of a square sum is varied between inside and outside of a normal range. When the resolver is in malfunction, a sine signal and a cosine signal are read. It is determined whether a malfunction determination of the resolver is prohibited, or not, from read values of the sine signal and the cosine signal, or square values thereof. When it is determined that the malfunction determination of the resolver is prohibited, the count value is accumulated and incremented every time the test value falls outside a normal range. When the count value arrives at a given value or higher, it is determined that the resolver is in malfunction.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: January 10, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shunichi Wada, Takayuki Yamamoto, Ryoichi Yonezawa, Masaki Matsushita, Katsuya Ikemoto
  • Publication number: 20160207563
    Abstract: A malfunction detection device for a resolver detects malfunction in a resolver with accuracy and stability even if a value of a square sum is varied between inside and outside of a normal range. When the resolver is in malfunction, a sine signal and a cosine signal are read. It is determined whether a malfunction determination of the resolver is prohibited, or not, from read values of the sine signal and the cosine signal, or square values thereof. When it is determined that the malfunction determination of the resolver is prohibited, the count value is accumulated and incremented every time the test value falls outside a normal range. When the count value arrives at a given value or higher, it is determined that the resolver is in malfunction.
    Type: Application
    Filed: March 29, 2016
    Publication date: July 21, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shunichi WADA, Takayuki YAMAMOTO, Ryoichi YONEZAWA, Masaki MATSUSHITA, Katsuya IKEMOTO
  • Publication number: 20160207564
    Abstract: A malfunction detection device for a resolver detects malfunction in a resolver with accuracy and stability even if a value of a square sum is varied between inside and outside of a normal range. When the resolver is in malfunction, a sine signal and a cosine signal are read. It is determined whether a malfunction determination of the resolver is prohibited, or not, from read values of the sine signal and the cosine signal, or square values thereof. When it is determined that the malfunction determination of the resolver is prohibited, the count value is accumulated and incremented every time the test value falls outside a normal range. When the count value arrives at a given value or higher, it is determined that the resolver is in malfunction.
    Type: Application
    Filed: March 29, 2016
    Publication date: July 21, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shunichi WADA, Takayuki YAMAMOTO, Ryoichi YONEZAWA, Masaki MATSUSHITA, Katsuya IKEMOTO
  • Patent number: 9346487
    Abstract: The apparatus herein provided includes a plurality of systems including driving circuits (20a, 20b) for driving motor coils (3a, 3b) corresponding thereto, and a control unit (10) for controlling control values of the driving circuits (20a, 20b), wherein, when a fault occurs in at least one of the plurality of systems including the motor coils (3a, 3b), the control unit (10) decreases a control value of a system(s) in which the fault occurs from an ordinary time control value or stops the drive by the system(s) in which the fault occurs, and also increases a control value of another system(s) in which the fault does not occur to more than an ordinary time control value.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: May 24, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihiko Kimpara, Akihiko Mori, Masaki Matsushita, Jiro Okada
  • Patent number: 9335184
    Abstract: A malfunction detection device for a resolver detects malfunction in a resolver with accuracy and stability even if a value of a square sum is varied between inside and outside of a normal range. When the resolver is in malfunction, a sine signal and a cosine signal are read. It is determined whether a malfunction determination of the resolver is prohibited, or not, from read values of the sine signal and the cosine signal, or square values thereof. When it is determined that the malfunction determination of the resolver is prohibited, the count value is accumulated and incremented every time the test value falls outside a normal range. When the count value arrives at a given value or higher, it is determined that the resolver is in malfunction.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: May 10, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shunichi Wada, Takayuki Yamamoto, Ryoichi Yonezawa, Masaki Matsushita, Katsuya Ikemoto
  • Patent number: 9242670
    Abstract: In a steering control device, a road surface reaction force torque calculation module (52) uses a vehicle speed, steering angle, and vehicle model to calculate a caster-trail-caused torque, a self-aligning torque, and a road surface reaction force torque. A reaction force command current calculation module (53) uses the road surface reaction force torque and the vehicle speed to calculate a reaction force command current.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: January 26, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaya Endo, Masahiko Kurishige, Takayuki Kifuku, Masaki Matsushita, Hideki Doi
  • Publication number: 20150298727
    Abstract: The apparatus herein provided includes a plurality of systems including driving circuits (20a, 20b) for driving motor coils (3a, 3b) corresponding thereto, and a control unit (10) for controlling control values of the driving circuits (20a, 20b) wherein, when a fault occurs in at least one of the plurality of systems including the motor coils (3a, 3b), the control unit (10) decreases a control value of a system(s) in which the fault occurs from an ordinary time control value or stops the drive by the system(s) in which the fault occurs, and also increases a control value of another system(s) in which the fault does not occur to more than an ordinary time control value.
    Type: Application
    Filed: January 11, 2012
    Publication date: October 22, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshihiko KIMPARA, Akihiko MORI, Masaki MATSUSHITA, Jiro OKADA
  • Publication number: 20150216860
    Abstract: The object is to provide a novel therapeutic strategy achieving high therapeutic effect on a skeletal dysplasia caused by excessive activation of FGFR3, particularly achondroplasia and hypochondroplasia. Provided is a therapeutic agent for a skeletal dysplasia, including meclizine or its pharmaceutically acceptable salt as an active ingredient.
    Type: Application
    Filed: February 20, 2014
    Publication date: August 6, 2015
    Applicant: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY
    Inventors: Kinji Ohno, Naoki Ishiguro, Hiroshi Kito, Masaki Matsushita
  • Patent number: 8983727
    Abstract: A steering control apparatus is obtained which can achieve a sophisticated control function and redundancy of a motor output torque control unit with a simple construction. The apparatus includes a motor 3 that provides assist torque to a steering system, and a processing unit 2 that has an input processing section 21 for taking in detection signals of various kinds of sensors, and an inverter 25a for driving the motor 3, wherein a command is given to the inverter 25a based on the detection signals. The processing unit 2 has a motor target output torque calculation section 221a, a motor output torque control unit 222, a plurality of main-calculation sections, and a plurality of sub-calculation sections corresponding to the main-calculation sections, and determines abnormality of the motor output torque control unit 222 based on individual calculation results of the main-calculation sections and the sub-calculation sections.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: March 17, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takayuki Kifuku, Hiroyuki Kozuki, Masaki Matsushita
  • Publication number: 20140350791
    Abstract: A vehicle steering control apparatus includes a power-supply supply portion 101 supplying a power supply to a micro-controller 102, an inverter 104 supplying power to drive a motor 5, a gate driver 103 controlling the inverter 104, a motor relay 105 opening and closing a current-passing path between the inverter 104 and the motor 5, a motor relay driver 106 controlling the motor relay 105, and a monitoring control portion A 108a and a monitoring control portion B 108b monitoring a power-supply voltage of the power-supply supply portion 101. Because multiple monitoring control portions are included, even in the event of an inconvenience in either one of the monitoring control portions A 108a and B 108b, the motor 5 can be stopped quickly in a reliable manner when the power-supply voltage goes out of a normal operation range.
    Type: Application
    Filed: December 5, 2011
    Publication date: November 27, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masaki Matsushita, Takayuki Kifuku, Hiroyuki Kozuki, Masatoshi Saito, Yu Kawano
  • Patent number: 8648560
    Abstract: In an electric motor control apparatus, an electric motor driving unit includes: a current detection unit configured to detect a current flowing through a current detection place in the electric motor driving unit. A control unit includes a current calculation unit configured to calculate a current value of a current flowing through an electric motor from an offset correction value obtained based on a first detection value detected at a time when a current flows through the current detection place and a second detection value detected at a time when a current does not flow through the current detection place. The offset correction value includes: a first offset correction value stored in nonvolatile memory of the control unit at a time of assembling the electric motor control apparatus; and a second offset correction value computed by the control unit while the electric motor is driven.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: February 11, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Matsushita, Takayuki Kifuku, Yasuaki Hori
  • Patent number: 8604734
    Abstract: In an electric motor control apparatus, an electric motor driving unit includes: a current detection unit configured to detect a current flowing through a current detection place in the electric motor driving unit. A control unit includes a current calculation unit configured to calculate a current value of a current flowing through an electric motor from an offset correction value obtained based on a first detection value detected at a time when a current flows through the current detection place and a second detection value detected at a time when a current does not flow through the current detection place. The offset correction value includes: a first offset correction value stored in nonvolatile memory of the control unit at a time of assembling the electric motor control apparatus; and a second offset correction value computed by the control unit while the electric motor is driven.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Matsushita, Takayuki Kifuku, Yasuaki Hori
  • Patent number: 8326493
    Abstract: A motor-driven power steering control apparatus is achieved, which uses a small-amplitude pass filter, the filter filtering out a component having a small amplitude, to remove a steering component from dynamic state quantity such as a rotational speed signal, and to accurately extract only a vibration component having a small amplitude compared with the steering component, and controls the vibration component to be reduced.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: December 4, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Isao Kezobo, Masahiko Kurishige, Masaya Endo, Takayuki Kifuku, Seiji Sawada, Masaki Matsushita