Patents by Inventor Tomoya Jomori

Tomoya Jomori 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: 20210041475
    Abstract: An electrostatic actuator includes a fixed electrode and a movable electrode arranged to face the fixed electrode. The movable electrode is configured to be displaceable with respect to the fixed electrode and a fixed portion. An attractive force acts between the movable electrode and the fixed portion. In the electrostatic actuator, a non-linear vibration of the movable electrode when a voltage is applied to the fixed electrode and the movable electrode is reduced by the attractive force acting between the movable electrode and the fixed portion.
    Type: Application
    Filed: October 28, 2020
    Publication date: February 11, 2021
    Inventors: Shota HARADA, Keitaro ITO, Tomoya JOMORI, Hideo YAMADA, Yuuki INAGAKI, Teruhisa AKASHI, Yoshiyuki HATA
  • Publication number: 20200263991
    Abstract: A vibration type angular velocity sensor includes a substrate having a surface; a plurality of fixation parts, a plurality of weights, two linear drive beams, a plurality of supporting members, a drive part and a detection part. The two linear drive beams are disposed on opposite sides of the weights in one direction so as to be connected to each other through the weights. The supporting members join the fixation parts to the drive beams. The drive part drives the drive beams to vibrate. The detection part generates an electric output according to displacement of the weights caused by an angular velocity applied thereto while the drive beams are being driven to vibrate. The fixation parts are disposed between the two linear drive beams.
    Type: Application
    Filed: December 10, 2019
    Publication date: August 20, 2020
    Inventor: Tomoya JOMORI
  • Publication number: 20200191571
    Abstract: A vibration gyroscope includes: a mass part supported to be displaceable in a first direction and a second direction; an exciter vibrating the mass part in the first direction; and a detector detecting a displacement amount of the mass part in the second direction. The first direction and the second direction are orthogonal to each other. A resonance frequency of the mass part in the first direction coincides with a resonance frequency of the mass part in the second direction. A Q-factor of vibration of the mass part in the second direction is smaller than a Q-factor of vibration of the mass part in the first direction.
    Type: Application
    Filed: February 20, 2020
    Publication date: June 18, 2020
    Inventors: Motohiro FUJIYOSHI, Yoshiteru OMURA, Takashi OZAKI, Tomoya JOMORI, Katsuaki GOTO, Megumi SUZUKI
  • Publication number: 20200088519
    Abstract: An angular velocity sensor includes: a substrate; a drive beam supported via a support member with a fixing part; a drive weight supported with the drive beam; a detection weight supported via a beam part including a detection beam with the drive weight; and a detection part in the detection beam generating an electric output corresponding to a displacement of the detection beam when an angular velocity is applied. When the angular velocity is applied while the drive weight and the detection weight vibrate and are driven by the drive beam, the detection beam is displaced in a direction intersecting the vibration direction. The angular velocity is detected based on a change of an output voltage of a detection piezoelectric film in accordance with a displacement of the detection beam.
    Type: Application
    Filed: November 21, 2019
    Publication date: March 19, 2020
    Inventor: Tomoya JOMORI
  • Publication number: 20190092620
    Abstract: A physical quantity sensor includes a substrate, a beam part that includes a detection beam, a detection weight that is supported on the substrate through the beam part, and a detection piezoelectric film that is disposed on the detection beam and is configured to generate an electric output according to displacement of the detection beam caused by movement of the detection weight in a direction due to an application of a physical quantity. The detection beam includes a first detection beam and a second detection beam that are disposed to hold the detection weight at different positions from each other in the direction. The first detection beam and the second detection beam have different spring constants, and the detection piezoelectric film is disposed on the first detection beam.
    Type: Application
    Filed: November 28, 2018
    Publication date: March 28, 2019
    Inventor: Tomoya JOMORI
  • Patent number: 10060744
    Abstract: When one direction of plane directions of a substrate is a first direction and a direction of the plane directions of the substrate perpendicular to the first direction is a second direction, a vibrating member is supported at an outer peripheral section via a plurality of beam sections having first beam-configuring members that can displace at least in the first direction and second beam-configuring members that are joined to the first beam-configuring members and that can displace at least in the second direction. In at least a subset of the plurality of beam sections, beam-configuring members on a side of the outer peripheral section among the first beam-configuring members and the second beam-configuring members are integrated with each other.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: August 28, 2018
    Assignee: DENSO CORPORATION
    Inventors: Minekazu Sakai, Tomoya Jomori
  • Patent number: 9910055
    Abstract: A vibration angular velocity sensor includes a substrate and a vibrator. The vibrator includes support members, linear drive beams, and a plurality of weight portions connected by the drive beams. The vibrator vibrates the plurality of weight portions by bending of the drive beams. The vibrator is fixed to the substrate through the support members at fixed points of the drive beam. A spring property of the support members is smaller than a spring property of the drive beams.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: March 6, 2018
    Assignee: DENSO CORPORATION
    Inventors: Tomoya Jomori, Yoichi Mochida
  • Patent number: 9696158
    Abstract: In a gyro sensor, two detection weights are placed in an outer drive weight to be arranged in an x-axis direction and coupled to each other via a coupling spring. By thus coupling the two detection weights via the coupling spring, it is possible to separate an in-phase-mode resonant frequency fin and an anti-phase-mode resonant frequency fanti from each other. As a result, it is possible to provide the gyro sensor which can suppress an output error on receiving an impact and perform more precise angular velocity detection.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: July 4, 2017
    Assignees: DENSO CORPORATION, Kyoto University
    Inventors: Tomoya Jomori, Toshiyuki Tsuchiya
  • Publication number: 20170108335
    Abstract: When one direction of plane directions of a substrate is a first direction and a direction of the plane directions of the substrate perpendicular to the first direction is a second direction, a vibrating member is supported at an outer peripheral section via a plurality of beam sections having first beam-configuring members that can displace at least in the first direction and second beam-configuring members that are joined to the first beam-configuring members and that can displace at least in the second direction. In at least a subset of the plurality of beam sections, beam-configuring members on a side of the outer peripheral section among the first beam-configuring members and the second beam-configuring members are integrated with each other.
    Type: Application
    Filed: June 11, 2015
    Publication date: April 20, 2017
    Inventors: Minekazu SAKAI, Tomoya JOMORI
  • Publication number: 20170052027
    Abstract: A vibration angular velocity sensor includes a fixed portion, a movable portion, a beam portion, and an anti-vibration spring structure. The movable portion has driving-detection weights. The beam portion has detection beams, support members, and driving beams, and has a frame structure formed of the driving beams, the support members, and the driving-detection weights. The anti-vibration spring structure is disposed between the detection beams and the fixed portion and is deformable along a first axis and a second axis. The vibration angular velocity sensor causes the driving-detection weights disposed on both sides of the fixed portion to undergo driving vibrations in directions opposite to each other along the first axis about the fixed portion and detects an angular velocity based on a fact that the driving-detection weights vibrate also along the second axis upon application of the angular velocity.
    Type: Application
    Filed: June 2, 2015
    Publication date: February 23, 2017
    Inventors: Tomoya JOMORI, Minekazu SAKAI
  • Patent number: 9476897
    Abstract: A physical quantity sensor has a resonance frequency f1 in same-phase mode and a resonance frequency f3 in same-phase absorptive mode greater than the resonance frequency f1. An absolute value ?f3 is a difference between the resonance frequency f3 in the same-phase absorptive mode and a value that is the product of the resonance frequency f1 in the same-phase mode multiplied by n; an avoidance difference D indicates a degree of deviation of the absolute value ?f3 from the resonance frequency f1 in the same-phase mode. A relation (?f3>n·f1·D) is satisfied, and, simultaneously, the avoidance difference D is provided to be greater than 0%. This can avoid the vibrational excitation by resonance interference from becoming the maximum displacement.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: October 25, 2016
    Assignee: DENSO CORPORATION
    Inventors: Tomoya Jomori, Yoichi Mochida
  • Patent number: 9219169
    Abstract: An angular velocity sensor for detecting an angular velocity includes a substrate having the stationary portion, two pair of driver weights, two detector weights, and a detector electrode. The angular velocity is detected by using a differential signal output indicating a variation in capacitances. When the absolute value of a de-coupling ratio (=(fanti?fin)/fanti) is greater than or equal to 0.07, the occurrence of the anti-phase mode movement can be prevented so as to prevent the occurrence of the output error of the gyro sensor and detect the angular velocity more precisely.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: December 22, 2015
    Assignees: DENSO CORPORATION, Kyoto University
    Inventors: Tomoya Jomori, Toshiyuki Tsuchiya
  • Publication number: 20150308828
    Abstract: In a gyro sensor, two detection weights are placed in an outer drive weight to be arranged in an x-axis direction and coupled to each other via a coupling spring. By thus coupling the two detection weights via the coupling spring, it is possible to separate an in-phase-mode resonant frequency fin and an anti-phase-mode resonant frequency fanti from each other. As a result, it is possible to provide the gyro sensor which can suppress an output error on receiving an impact and perform more precise angular velocity detection.
    Type: Application
    Filed: November 27, 2013
    Publication date: October 29, 2015
    Inventors: Tomoya JOMORI, Toshiyuki TSUCHIYA
  • Publication number: 20150168437
    Abstract: A physical quantity sensor has a resonance frequency f1 in same-phase mode and a resonance frequency f3 in same-phase absorptive mode greater than the resonance frequency f1. An absolute value ?f3 is a difference between the resonance frequency f3 in the same-phase absorptive mode and a value that is the product of the resonance frequency f1 in the same-phase mode multiplied by n; an avoidance difference D indicates a degree of deviation of the absolute value ?f3 from the resonance frequency f1 in the same-phase mode. A relation (?f3>f1×D) where the absolute value ?f3 is greater than a value that is the product of the resonance frequency f1 in the same-phase mode multiplied by the avoidance difference D is satisfied, and, simultaneously, the avoidance difference D is provided to be greater than 0%. This can avoid the vibrational excitation by resonance interference from becoming the maximum displacement.
    Type: Application
    Filed: May 28, 2013
    Publication date: June 18, 2015
    Inventors: Tomoya Jomori, Yoichi Mochida
  • Publication number: 20140360265
    Abstract: A vibration angular velocity sensor includes a substrate and a vibrator. The vibrator includes support members, linear drive beams, and a plurality of weight portions connected by the drive beams. The vibrator vibrates the plurality of weight portions by bending of the drive beams. The vibrator is fixed to the substrate through the support members at fixed points of the drive beam. A spring property of the support members is smaller than a spring property of the drive beams.
    Type: Application
    Filed: December 20, 2012
    Publication date: December 11, 2014
    Inventors: Tomoya Jomori, Yoichi Mochida
  • Patent number: 8601873
    Abstract: In an angular velocity sensor, a vibrator is coupled with a substrate through a beam part, and is movable in a first direction and a second direction that is perpendicular to the first direction. A driving part is configured to vibrate the vibrator in the first direction. A detecting part is configured to detect displacement of the vibrator in the second direction as a change in capacitance, the displacement being caused by Coriolis force generated in the vibrator due to vibration of the vibrator and an angular velocity around a third direction that is perpendicular to the first direction and the second direction. A restricting part is configured to restrict displacement of the vibrator in the second direction based on the change in capacitance. The angular velocity sensor is configured to satisfy a condition where ? sin ? is equal to or less than 1.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: December 10, 2013
    Assignees: DENSO CORPORATION, Toyota Jidosha Kabushiki Kaisha
    Inventors: Minekazu Sakai, Tomoya Jomori, Takashi Katsumata
  • Publication number: 20130270659
    Abstract: An angular velocity sensor for detecting an angular velocity includes a substrate having the stationary portion, two pair of driver weights, two detector weights, and a detector electrode. The angular velocity is detected by using a differential signal output indicating a variation in capacitances. When the absolute value of a de-coupling ratio (=(fanti?fin)/fanti) is greater than or equal to 0.07, the occurrence of the anti-phase mode movement can be prevented so as to prevent the occurrence of the output error of the gyro sensor and detect the angular velocity more precisely.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 17, 2013
    Inventors: Tomoya JOMORI, Toshiyuki TSUCHIYA
  • Patent number: 8438922
    Abstract: Each of first and second oscillators includes a detector portion and a driver portion. The detector portion includes a stationary detector electrode and a detector weight, which includes a movable detector electrode opposed to the stationary detector electrode. The driver portion includes a driver weight having a movable driver electrode, which oscillates the detector portion, and a stationary driver electrode opposed to the movable driver electrode. The driver weights of the first and second oscillators are directly connected through a driver joint beam. The detector weights of the first and second oscillators are directly connected through a detector joint beam.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: May 14, 2013
    Assignee: DENSO CORPORATION
    Inventors: Tomoya Jomori, Minekazu Sakai
  • Publication number: 20110271759
    Abstract: In an angular velocity sensor, a vibrator is coupled with a substrate through a beam part, and is movable in a first direction and a second direction that is perpendicular to the first direction. A driving part is configured to vibrate the vibrator in the first direction. A detecting part is configured to detect displacement of the vibrator in the second direction as a change in capacitance, the displacement being caused by Coriolis force generated in the vibrator due to vibration of the vibrator and an angular velocity around a third direction that is perpendicular to the first direction and the second direction. A restricting part is configured to restrict displacement of the vibrator in the second direction based on the change in capacitance. The angular velocity sensor is configured to satisfy a condition where ? sin ? is equal to or less than 1.
    Type: Application
    Filed: May 5, 2011
    Publication date: November 10, 2011
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Minekazu SAKAI, Tomoya Jomori, Takashi Katsumata
  • Publication number: 20110056292
    Abstract: Each of first and second oscillators includes a detector portion and a driver portion. The detector portion includes a stationary detector electrode and a detector weight, which includes a movable detector electrode opposed to the stationary detector electrode. The driver portion includes a driver weight having a movable driver electrode, which oscillates the detector portion, and a stationary driver electrode opposed to the movable driver electrode. The driver weights of the first and second oscillators are directly connected through a driver joint beam. The detector weights of the first and second oscillators are directly connected through a detector joint beam.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 10, 2011
    Applicant: DENSO CORPORATION
    Inventors: Tomoya Jomori, Minekazu Sakai