Patents by Inventor Kei Kanemoto

Kei Kanemoto 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: 10697773
    Abstract: A physical quantity sensor includes a driven section and a drive spring that supports the driven section so that the driven section is displaceable in a first direction. The drive spring has a serpentine shape and includes a plurality of spring structures extending in a second direction that intersects a first direction. At least one of the spring structures has a thin section that is thinner in a third direction that intersects the first and second directions than the other portions of the drive spring.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: June 30, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Makoto Furuhata, Kei Kanemoto
  • Patent number: 10670428
    Abstract: A circuit device adapted to perform detection of angular velocity observed by a capacitance type angular velocity transducer includes a drive device, a detection device, a vibration frequency controller adapted to variably control at least one of a detection frequency and a drive frequency of the capacitance type angular velocity transducer, and a storage adapted to store a correction parameter group adapted to correct a sensor characteristic of the capacitance type angular velocity transducer due to a variation of at least one of the detection frequency and the drive frequency.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: June 2, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Ryuta Nishizawa, Kei Kanemoto, Takayuki Kikuchi
  • Patent number: 10627234
    Abstract: A gyro sensor includes: a substrate; a first drive section; and a first detection section and a second detection section that detect angular velocity. The first detection section includes a first movable body including a first movable electrode that vibrates by vibration of the first drive section and is displaced in response to the angular velocity, and a first fixed electrode fixed to the substrate and facing the first movable electrode. The second detection section includes a second movable body including a second movable electrode that vibrates by vibration of the first drive section and is displaced in response to the angular velocity, and a second fixed electrode fixed to the substrate and facing the second movable electrode. The first movable body and the second movable body are coupled together by a first coupling section.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: April 21, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Takayuki Kikuchi, Kei Kanemoto
  • Patent number: 10442081
    Abstract: An arithmetic processing unit 40 estimates a possible existence region of a specific state quantity by performing polyhedron projection processing for finding a projection region obtained by projecting a convex polyhedron to a subspace representing the specific state quantity, where the convex polyhedron is within a space configured with the contact reaction forces of a plurality of contacting portions (13, 23) of a mobile robot 1 and the specific state quantity as variable components and where the convex polyhedron is specified by a mechanical relation between the contact reaction forces and the specific state quantity and by a linear inequality representing a contact reaction force constraint condition.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: October 15, 2019
    Assignees: HONDA MOTOR CO., LTD., THE UNIVERSITY OF TOKYO
    Inventors: Masao Kanazawa, Yoshiki Kanemoto, Shunichi Nozawa, Yohei Kakiuchi, Kei Okada, Masayuki Inaba
  • Patent number: 10302672
    Abstract: An angular velocity detection circuit includes: an angular velocity signal generation unit that generates an angular velocity signal on the basis of an output signal of a differential amplifier unit that differentially amplifies a signal based on an output signal of a first conversion unit and a signal based on an output signal of a second conversion unit; and a correction signal generation unit that generates a correction signal for reducing an offset of the angular velocity signal which occurs due to leakage signals which are respectively included in the first detection signal and the second detection signal on the basis of a signal based on drive oscillation of the angular velocity detection element. The correction signal is input to a circuit that is located on a first signal path ranging from the first detection electrode of an angular velocity detection element to the differential amplifier unit.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: May 28, 2019
    Assignee: Seiko Epson Corporation
    Inventor: Kei Kanemoto
  • Publication number: 20190113341
    Abstract: A physical quantity sensor includes a substrate, a first detection electrode that includes a first electrode finger, a first spring that supports the first detection electrode in a displaceable manner in a first direction with respect to the substrate, a second detection electrode that includes a second electrode finger which is disposed at a distance from the first electrode finger in the first direction, and a second spring that supports the second detection electrode in a displaceable manner in the first direction with respect to the substrate. A spring constant of the first spring in the first direction is equal to a spring constant of the second spring in the first direction.
    Type: Application
    Filed: October 16, 2018
    Publication date: April 18, 2019
    Inventors: Kazuyuki NAGATA, Takayuki KIKUCHI, Kei KANEMOTO
  • Publication number: 20180369863
    Abstract: A vibration device includes a substrate that contains movable ions, an element unit that has a movable portion which is displaceable from the substrate, and a conductor layer that is disposed on a side of the substrate which is opposite to the element unit. When a potential of the movable portion is set to E1 and a potential of the conductor layer is set to E2, |E1?E2|<|E1| is satisfied. In a plan view obtained in a direction where the conductor layer, the substrate, and the element unit are juxtaposed with one another, the conductor layer overlaps at least a portion of the movable portion.
    Type: Application
    Filed: June 25, 2018
    Publication date: December 27, 2018
    Inventors: Kei KANEMOTO, Takayuki KIKUCHI
  • Publication number: 20180306581
    Abstract: A physical quantity sensor includes a driven section and a drive spring that supports the driven section so that the driven section is displaceable in a first direction. The drive spring has a serpentine shape and includes a plurality of spring structures extending in a second direction that intersects a first direction. At least one of the spring structures has a thin section that is thinner in a third direction that intersects the first and second directions than the other portions of the drive spring.
    Type: Application
    Filed: April 9, 2018
    Publication date: October 25, 2018
    Inventors: Makoto FURUHATA, Kei KANEMOTO
  • Publication number: 20180283868
    Abstract: A physical quantity sensor includes: a base substrate; a first wiring portion that is fixed to the base substrate; a second wiring portion that is fixed to the base substrate and has at least a part disposed in parallel to the first wiring portion; and an electrode portion that is disposed in the base substrate and has a reference potential. The electrode portion is disposed between the base substrate, and the first and second wiring portions. At least parts of the first and second wiring portions overlap the electrode portion in a plan view.
    Type: Application
    Filed: March 21, 2018
    Publication date: October 4, 2018
    Inventors: Kei KANEMOTO, Makoto FURUHATA
  • Publication number: 20180238688
    Abstract: A gyro sensor includes: a substrate; a first drive section; and a first detection section and a second detection section that detect angular velocity. The first detection section includes a first movable body including a first movable electrode that vibrates by vibration of the first drive section and is displaced in response to the angular velocity, and a first fixed electrode fixed to the substrate and facing the first movable electrode. The second detection section includes a second movable body including a second movable electrode that vibrates by vibration of the first drive section and is displaced in response to the angular velocity, and a second fixed electrode fixed to the substrate and facing the second movable electrode. The first movable body and the second movable body are coupled together by a first coupling section.
    Type: Application
    Filed: January 3, 2018
    Publication date: August 23, 2018
    Inventors: Takayuki KIKUCHI, Kei KANEMOTO
  • Patent number: 9970763
    Abstract: A gyro sensor includes a substrate, an oscillation member, fixed driving electrodes and a movable driving electrode that oscillate the oscillation member, fixed detection electrodes and a movable detection electrode that detect a signal that varies in accordance with oscillation by Coriolis' force of the oscillation member, a bias voltage application unit that applies a bias voltage to the oscillation member, and a storage unit, and the bias voltage application unit sets a value of the bias voltage based on information stored in the storage unit.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: May 15, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Kei Kanemoto
  • Publication number: 20180052012
    Abstract: A circuit device adapted to perform detection of angular velocity observed by a capacitance type angular velocity transducer includes a drive device, a detection device, a vibration frequency controller adapted to variably control at least one of a detection frequency and a drive frequency of the capacitance type angular velocity transducer, and a storage adapted to store a correction parameter group adapted to correct a sensor characteristic of the capacitance type angular velocity transducer due to a variation of at least one of the detection frequency and the drive frequency.
    Type: Application
    Filed: August 9, 2017
    Publication date: February 22, 2018
    Inventors: Ryuta NISHIZAWA, Kei KANEMOTO, Takayuki KIKUCHI
  • Patent number: 9846442
    Abstract: There is provided a functional element capable of preventing an oblique vibration due to a vibration leakage phenomenon from propagating to degrade the detection accuracy. A gyro element as the functional element includes a support body, a detection section, a drive coupling section having a first part and a second part, and a mass section connected to the drive coupling section, and connected to the support body via the drive coupling section, and the mass section performs the drive vibration in a direction along a third axis parallel to a normal line of a plane including the first axis and the second axis perpendicular to each other.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: December 19, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Kei Kanemoto, Makoto Furuhata
  • Patent number: 9798332
    Abstract: There is provided a functional element capable of preventing an oblique vibration due to a vibration leakage phenomenon from propagating to degrade the detection accuracy. A gyro element as the functional element includes a support body, a detection section, a drive coupling section having a first part and a second part, and a mass section connected to the drive coupling section, and connected to the support body via the drive coupling section, and the mass section performs the drive vibration in a direction along a third axis parallel to a normal line of a plane including the first axis and the second axis perpendicular to each other.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: October 24, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Kei Kanemoto, Makoto Furuhata
  • Publication number: 20170254833
    Abstract: An angular velocity detection circuit includes: an angular velocity signal generation unit that generates an angular velocity signal on the basis of an output signal of a differential amplifier unit that differentially amplifies a signal based on an output signal of a first conversion unit and a signal based on an output signal of a second conversion unit; and a correction signal generation unit that generates a correction signal for reducing an offset of the angular velocity signal which occurs due to leakage signals which are respectively included in the first detection signal and the second detection signal on the basis of a signal based on drive oscillation of the angular velocity detection element. The correction signal is input to a circuit that is located on a first signal path ranging from the first detection electrode of an angular velocity detection element to the differential amplifier unit.
    Type: Application
    Filed: February 23, 2017
    Publication date: September 7, 2017
    Inventor: Kei KANEMOTO
  • Publication number: 20170254644
    Abstract: A drive circuit includes a first converter that includes a first operational amplifier and a first capacitance, accumulates first signals output from a first electrode of an angular velocity detection element and input to the first operational amplifier in the first capacitance, and then, converts the signals to a voltage, a first phase adjustment portion that adjusts a phase of the drive signal which drives the angular velocity detection element and limits a frequency band of the drive signal based on the output signals from the first converter, and a drive signal generation portion that generates the drive signal based on the output signals from the first phase adjustment portion.
    Type: Application
    Filed: February 28, 2017
    Publication date: September 7, 2017
    Inventor: Kei KANEMOTO
  • Publication number: 20170254645
    Abstract: An angular velocity detection circuit includes: a first conversion unit that includes a first operational amplifier, and converts a first detection signal, which is output from a first detection electrode and is input to a first input terminal of the first operational amplifier, into a voltage; an angular velocity signal generation unit that generates an angular velocity signal on the basis of an output signal of the first conversion unit; and a first correction signal generation unit that generates a first correction signal for reducing an offset of the angular velocity signal which occurs due to a leakage signal included in the first detection signal on the basis of a signal based on drive oscillation of the angular velocity detection element. The first correction signal is input to the first input terminal or a second input terminal of the first operational amplifier directly or through a resistor.
    Type: Application
    Filed: February 23, 2017
    Publication date: September 7, 2017
    Inventor: Kei KANEMOTO
  • Patent number: 9470525
    Abstract: A gyro sensor includes: a base body; a vibrating body; a driving portion driving the vibrating body in a direction of a first axis; a movable electrode portion displaceable, according to angular velocity about a second axis perpendicular to the first axis, in a direction of a third axis perpendicular to the first axis and the second axis; a first spring portion connected to the vibrating body and a first side surface of the movable electrode portion, the first side surface intersecting the first axis or the second axis; a second spring portion connected to the vibrating body and a second side surface of the movable electrode portion, the second side surface being parallel to the first side surface. The first spring portion and the second spring portion have portions extending in the direction of the first axis and portions extending in a direction of the second axis.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: October 18, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Kei Kanemoto
  • Publication number: 20160258753
    Abstract: A gyro sensor includes a substrate, an oscillation member, fixed driving electrodes and a movable driving electrode that oscillated the oscillation member, fixed detection electrodes and a movable detection electrode that id detected a signal that varies in accordance with oscillation by Coriolis' force of the oscillation member, a bias voltage application unit that applies a bias voltage to the oscillation member, and a storage unit, and the bias voltage application unit sets a value of the bias voltage based on information stored in the storage unit.
    Type: Application
    Filed: February 5, 2016
    Publication date: September 8, 2016
    Inventor: Kei KANEMOTO
  • Patent number: 9389078
    Abstract: A gyro sensor includes a first detection mass unit provided with a drive mass unit, a drive unit, a first detection unit and a first vibrating body; and a second detection mass unit provided with a second detection unit and a second vibrating body, the first vibrating body extends in the direction of the first axis and one end thereof is connected to the first detection mass unit, the second vibrating body extends in a direction that is opposite to an extension direction of the first vibrating body, and one end thereof is connected to the second detection mass unit, and the vibrating bodies vibrate in the direction of a third axis, along with the vibration in the direction of the first axis.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: July 12, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Kei Kanemoto