Patents by Inventor Takafumi Moriguchi
Takafumi Moriguchi 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).
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Publication number: 20230358539Abstract: A vibrating-type gyroscope element includes a fixed part, a resonator having a vibration mode of cos N? (N is a natural number of two or more), support parts-30, and electrodes. The electrodes are arranged in 4N orientations arranged in an outer circumferential direction of the resonator. The electrodes include at least one primary driving electrode-PD and at least one secondary pickoff electrode. A relationship U ? 1 or (S1 + S2) - 2 ? |S1 - S2| is satisfied, where S1 is the number of cases where a secondary pickoff electrode is clockwise adjacent to a primary driving electrode, S2 is the number of cases where a secondary pickoff electrode is anticlockwise adjacent to a primary driving electrode, and U is the number of the secondary pickoff electrodes being neither clockwise nor anticlockwise adjacent to a primary driving electrode.Type: ApplicationFiled: June 24, 2021Publication date: November 9, 2023Inventors: Ryohei UCHINO, Takafumi MORIGUCHI, Naoki OKIMOTO
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Publication number: 20230243653Abstract: A vibratory gyro element 100 includes a fixed part 10, a resonator 20 having a cos N? (N is a natural number of two or more) mode of vibration, support parts 30, and electrodes 40. The electrodes 40 are arranged in 4N orientations arranged in an outer circumferential direction of the resonator 20. The electrodes 40 include a primary driving electrode PD, a primary pickoff electrode PPO, a secondary pickoff electrode SPO, and a secondary driving electrode SD. The primary pickoff electrode PPO is arranged in the same orientation as that of the primary driving electrode PD, and the secondary driving electrode SD is arranged in the same orientation as that of the secondary pickoff electrode SPO.Type: ApplicationFiled: June 24, 2021Publication date: August 3, 2023Inventors: Ryohei UCHINO, Takafumi MORIGUCHI, Naoki OKIMOTO
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Publication number: 20230140998Abstract: A vibration-type angular velocity sensor (100) includes a first angular velocity sensor unit (101) and a second angular velocity sensor unit (102). In a predetermined period, the second angular velocity sensor unit performs a process of detecting an angular velocity based on secondary vibration of a vibrator (11) by a secondary side control circuit (17) and a process of detecting the angular velocity based on the secondary vibration of the vibrator by the primary side control circuit (16) by interchanging functions. The first angular velocity sensor unit detects the angular velocity in the predetermined period. The bias component of the first angular velocity sensor unit is calculated based on a first detection result detected by the first angular velocity sensor unit in the predetermined period and a second detection result detected by the second angular velocity sensor unit in the predetermined period.Type: ApplicationFiled: July 16, 2020Publication date: May 11, 2023Inventor: Takafumi MORIGUCHI
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Publication number: 20230140455Abstract: The azimuth/attitude angle measuring device (100) includ es a first angular velocity sensor (103), a second angular ve locity sensor (104), a power supply unit (102), and a control unit (101). The control unit is configured so that, when an angular velocity, which is to be used in an operation before and after interchanging a function of a primary side control circuit (12) and a function of a secondary side control circu it (13), is detected by one of the first angular velocity sen sor and the second angular velocity sensor, the control unit does not perform control for interchanging the function of th e primary side control circuit and the function of the second ary side control circuit in the other of the first angular ve locity sensor and the second angular velocity sensor.Type: ApplicationFiled: March 23, 2021Publication date: May 4, 2023Inventor: Takafumi MORIGUCHI
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Publication number: 20230123765Abstract: A vibration-type angular velocity sensor (100) includes a primary side control circuit (2) and a secondary side control circuit (3) which are configured so that a function as the primary side control circuit (2) and a function as the secondary side control circuit (3) are interchangeable, in which an offset value after interchange and an offset value before interchange are symmetric values with respect to a predetermined reference value.Type: ApplicationFiled: March 23, 2021Publication date: April 20, 2023Inventor: Takafumi MORIGUCHI
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Patent number: 10775169Abstract: In a vibrating structure angular rate sensor, a signal generator generates a phase change suppressing signal in which a phase change according to an amplitude of a rectangular wave signal generated by at least one of a first modulator and a second modulator is suppressed.Type: GrantFiled: March 9, 2018Date of Patent: September 15, 2020Assignee: Sumitomo Precision Products Co., Ltd.Inventor: Takafumi Moriguchi
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Patent number: 10161751Abstract: This vibration-type angular rate sensor corrects a sensor output from a secondary-side control circuit by adding, to a closed control loop of the secondary-side control circuit, an offset value based on the output of a closed control loop of a primary-side control circuit dependent on temperature.Type: GrantFiled: February 12, 2015Date of Patent: December 25, 2018Assignee: Sumitomo Precision Products Co., Ltd.Inventor: Takafumi Moriguchi
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Publication number: 20180259334Abstract: In a vibrating structure angular rate sensor, a signal generator generates a phase change suppressing signal in which a phase change according to an amplitude of a rectangular wave signal generated by at least one of a first modulator and a second modulator is suppressed.Type: ApplicationFiled: March 9, 2018Publication date: September 13, 2018Inventor: Takafumi MORIGUCHI
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Publication number: 20160377433Abstract: This vibration-type angular rate sensor corrects a sensor output from a secondary-side control circuit by adding, to a closed control loop of the secondary-side control circuit, an offset value based on the output of a closed control loop of a primary-side control circuit dependent on temperature.Type: ApplicationFiled: February 12, 2015Publication date: December 29, 2016Inventor: Takafumi MORIGUCHI
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Patent number: 9494426Abstract: A vibratory gyroscope is provided comprising a plurality of secondary pickoff transducers which are each sensitive to the secondary response mode, wherein: at least two of the secondary pickoff transducers comprise skew transducers designed to be sensitive to the primary mode which produce an induced quadrature signal in response thereto. A method of using the gyroscope is provided comprising the steps of arranging electrical connections between the secondary pickoff transducers and a pickoff amplifier so that in use the induced quadrature signal is substantially rejected by the amplifier in the absence of a fault condition, and the amplifier outputs an induced quadrature signal when a fault condition disconnects one of the skew transducers from the amplifier, and a comparator compares the quadrature output from the pickoff amplifier with a predetermined threshold value and provides a fault indication when the predetermined threshold is exceeded.Type: GrantFiled: November 27, 2012Date of Patent: November 15, 2016Assignee: Atlantic Inertial Systems LimitedInventors: Michael Durston, Takafumi Moriguchi, Ryuta Araki
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Patent number: 9441968Abstract: A direction detector that allows true north detection accuracy to be improved is provided. In a direction detector 1, an attitude changer 100 rotates an angular velocity sensor 26 around a detection axis and controls an attitude of the angular velocity sensor 26 so that the detection axis is directed in a predetermined measuring direction and an opposite direction to the predetermined measuring direction. A control device 30 controls the attitude changer 100 so that the angular velocity sensor 26 rotates in a first rotation direction around the detection axis before the angular velocity sensor 26 starts to detect an angular velocity around the predetermined measuring direction.Type: GrantFiled: January 30, 2014Date of Patent: September 13, 2016Assignee: SUMITOMO PRECISION PRODUCTS CO., LTD.Inventor: Takafumi Moriguchi
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Publication number: 20160033271Abstract: A direction detector that allows true north detection accuracy to be improved is provided. In a direction detector 1, an attitude changer 100 rotates an angular velocity sensor 26 around a detection axis and controls an attitude of the angular velocity sensor 26 so that the detection axis is directed in a predetermined measuring direction and an opposite direction to the predetermined measuring direction. A control device 30 controls the attitude changer 100 so that the angular velocity sensor 26 rotates in a first rotation direction around the detection axis before the angular velocity sensor 26 starts to detect an angular velocity around the predetermined measuring direction.Type: ApplicationFiled: January 30, 2014Publication date: February 4, 2016Applicant: SUMITOMO PRECISION PRODUCTS CO., LTD.Inventor: Takafumi MORIGUCHI
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Patent number: 9151612Abstract: A vibratory gyro which is provided with a ring-shaped vibrating body, leg portions flexibly supporting the ring-shaped vibrating body, a plurality of electrodes formed by having a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in the thickness direction, and a fixed potential electrode. The plurality of electrodes include a bank of driving electrodes for exciting primary vibration, detection electrodes for detecting secondary vibration, and suppression electrodes for suppressing the secondary vibration on the basis of a voltage signal from the detection electrodes. The driving electrodes, the detection electrodes and the suppression electrodes are disposed in the region from an outer peripheral edge of the ring-shaped vibrating body to a vicinity of the outer peripheral edge and/or a region from an inner peripheral edge thereof to a vicinity of the inner peripheral edge.Type: GrantFiled: January 6, 2010Date of Patent: October 6, 2015Assignee: SUMITOMO PRECISION PRODUCTS Co., Ltd.Inventors: Ryuta Araki, Takashi Ikeda, Hiroshi Nishida, Takafumi Moriguchi, Yasuyuki Hirata
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Publication number: 20140338449Abstract: A vibratory gyroscope is provided comprising a plurality of secondary pickoff transducers which are each sensitive to the secondary response mode, wherein: at least two of the secondary pickoff transducers comprise skew transducers designed to be sensitive to the primary mode which produce an induced quadrature signal in response thereto. A method of using the gyroscope is provided comprising the steps of arranging electrical connections between the secondary pickoff transducers and a pickoff amplifier so that in use the induced quadrature signal is substantially rejected by the amplifier in the absence of a fault condition, and the amplifier outputs an induced quadrature signal when a fault condition disconnects one of the skew transducers from the amplifier, and a comparator compares the quadrature output from the pickoff amplifier with a predetermined threshold value and provides a fault indication when the predetermined threshold is exceeded.Type: ApplicationFiled: November 27, 2012Publication date: November 20, 2014Applicants: SUMITOMO PRECISION PRODUCTS COMPANY LIMITED, ATLANTIC INERTIAL SYSTEMS LIMITEDInventors: Michael Durston, Takafumi Moriguchi, Ryuta Araki
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Patent number: 8601872Abstract: A vibrating gyroscope according to this invention includes a ring-shaped vibrating body 11 having a uniform plane, a leg portion 15 flexibly supporting the ring-shaped vibrating body and having a fixed end, a fixed potential electrode 16, and a plurality of electrodes 13a, 13b, . . . , 13h formed on the plane with a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in a thickness direction thereof. In this case, in a representative example shown in FIG. 1, when one of driving electrodes 13a for exciting a primary vibration of the ring-shaped vibrating body 11 in a vibration mode of cos N? is set as a reference driving electrode, the plurality of remaining electrodes 13b, . . . , 13h are disposed at specific positions. Such disposition allows this vibrating gyroscope to detect a uniaxial to triaxial angular velocity by adopting a secondary vibration detector inclusive of an out-of-plane vibration mode.Type: GrantFiled: February 20, 2009Date of Patent: December 10, 2013Assignee: SUMITOMO PRECISION PRODUCTS Co., Ltd.Inventors: Takashi Ikeda, Hiroshi Nishida, Osamu Torayashiki, Mitsuhiko Takemura, Tsuyoshi Fujimura, Ryuta Araki, Takafumi Moriguchi, Nobutaka Teshima, Yasuyuki Hirata
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Patent number: 8381590Abstract: A vibrating gyroscope comprises a ring-shaped vibrating body (11) a leg portion (15) flexibly supporting the body (11) and having a fixed end, a fixed potential electrode (16), and a plurality of electrodes (13a-13d) with a piezoelectric film sandwiched between an upper and a lower-layer metallic film in a thickness direction thereof. When N is a natural number of 2 or more, the plurality of electrodes (13a-13d) include driving electrodes (13a) for a primary vibration in a vibration mode of cosN?, which are each disposed (360/N)° apart from each other in a circumferential direction, first detection electrodes (13b) and second detection electrodes (13d) for detecting a secondary vibration generated when an angular velocity is applied to the body (11), which are each disposed in a certain region related to the driving electrode (13a) Each of the electrodes is also disposed in a certain region of the body (11).Type: GrantFiled: November 26, 2008Date of Patent: February 26, 2013Assignee: Sumitomo Precision Products Co., Ltd.Inventors: Takashi Ikeda, Hiroshi Nishida, Osamu Torayashiki, Mitsuhiko Takemura, Tsuyoshi Fujimura, Ryuta Araki, Takafumi Moriguchi, Nobutaka Teshima, Yasuyuki Hirata
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Patent number: 8375792Abstract: A vibrating gyroscope according to this invention includes a ring-shaped vibrating body 11 having a uniform plane, a leg portion 15 flexibly supporting the ring-shaped vibrating body and having a fixed end, a fixed potential electrode 16, and a plurality of electrodes 13a, 13b, . . . , 13f formed on the plane with a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in a thickness direction thereof. In this case, in a representative example shown in FIG. 1, when one of driving electrodes 13a for exciting a primary vibration of the ring-shaped vibrating body 11 in a vibration mode of cos N? is set as a reference driving electrode, the plurality of remaining electrodes 13b, . . . , 13f are disposed at specific positions.Type: GrantFiled: February 20, 2009Date of Patent: February 19, 2013Assignee: Sumitomo Precision Products Co., Ltd.Inventors: Takashi Ikeda, Hiroshi Nishida, Osamu Torayashiki, Mitsuhiko Takemura, Tsuyoshi Fujimura, Ryuta Araki, Takafumi Moriguchi, Nobutaka Teshima, Yasuyuki Hirata
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Publication number: 20120125100Abstract: A vibrating gyroscope according to this invention includes a ring-shaped vibrating body 11 having a uniform plane, leg portions 15 flexibly supporting the ring-shaped vibrating body, a plurality of electrodes 13a, 13b, . . . , 13h that are disposed on the plane of or above the ring-shaped vibrating body and are formed with one of an upper-layer metallic film and a lower-layer metallic film, and a piezoelectric film being sandwiched between the upper-layer metallic film and the lower-layer metallic film in a thickness direction thereof. When one of the driving electrodes 13a for exciting a primary vibration of the ring-shaped vibrating body 11 in a vibration mode of cos N? is referred to as a reference driving electrode, the remaining plurality of electrodes 13b, . . . , 13h are disposed at specific positions. Such disposition allows this vibrating gyroscope to detect a secondary vibration inclusive of an out-of-plane vibration mode.Type: ApplicationFiled: May 13, 2010Publication date: May 24, 2012Applicant: SUMITOMO PRECISION PRODUCTS CO, LTD.Inventors: Ryuta Araki, Takafumi Moriguchi, Takashi Ikeda, Hiroshi Nishida, Yasuyuki Hirata
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Publication number: 20110308315Abstract: A vibratory gyro which is provided with a ring-shaped vibrating body, leg portions flexibly supporting the ring-shaped vibrating body, a plurality of electrodes formed by having a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in the thickness direction, and a fixed potential electrode. The plurality of electrodes include a bank of driving electrodes for exciting primary vibration, detection electrodes for detecting secondary vibration, and suppression electrodes for suppressing the secondary vibration on the basis of a voltage signal from the detection electrodes. The driving electrodes, the detection electrodes and the suppression electrodes are disposed in the region from an outer peripheral edge of the ring-shaped vibrating body to a vicinity of the outer peripheral edge and/or a region from an inner peripheral edge thereof to a vicinity of the inner peripheral edge.Type: ApplicationFiled: January 6, 2010Publication date: December 22, 2011Applicant: Sumitomo Precision Products Co., Ltd.Inventors: Ryuta Araki, Takashi Ikeda, Hiroshi Nishida, Takafumi Moriguchi, Yasuyuki Hirata
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Publication number: 20110041606Abstract: A vibrating gyroscope according to this invention includes a ring-shaped vibrating body 11 having a uniform plane, a leg portion 15 flexibly supporting the ring-shaped vibrating body and having a fixed end, a fixed potential electrode 16, and a plurality of electrodes 13a, 13b, . . . , 13h formed on the plane with a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in a thickness direction thereof. In this case, in a representative example shown in FIG. 1, when one of driving electrodes 13a for exciting a primary vibration of the ring-shaped vibrating body 11 in a vibration mode of cos N? is set as a reference driving electrode, the plurality of remaining electrodes 13b, . . . , 13h are disposed at specific positions. Such disposition allows this vibrating gyroscope to detect a uniaxial to triaxial angular velocity by adopting a secondary vibration detector inclusive of an out-of-plane vibration mode.Type: ApplicationFiled: February 20, 2009Publication date: February 24, 2011Applicant: SUMITOMO PRECISION PRODUCTS CO., LTD.Inventors: Takashi Ikeda, Hiroshi Nishida, Osamu Torayashiki, Mitsuhiko Takemura, Tsuyoshi Fujimura, Ryuta Araki, Takafumi Moriguchi, Nobutaka Teshima, Yasuyuki Hirata