Patents by Inventor Daisuke Gunji
Daisuke Gunji 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: 20200311920Abstract: At least one processor of an apparatus functions as a generation unit that identifies at least an outer edge of a specific region in a surface layer of an object and that generates outer edge candidates, and a control unit that selects an outer edge candidate based on an instruction from a user among the generated outer edge candidates.Type: ApplicationFiled: March 24, 2020Publication date: October 1, 2020Inventors: Daisuke Gunji, Tomonobu Hiraishi
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Publication number: 20200070891Abstract: A suspension operation system includes: a suspension that includes a plurality of links supporting a wheel, at least one or more of the links having an actuator increasing or decreasing its length in an axial direction; a control device that supplies a drive signal to the actuator to control operation of the suspension; and a suspension operation terminal that operates the suspension. The suspension operation terminal includes: a detector that detects operation input information to the suspension operation terminal; and a communicator that transmits information about a target posture of the wheel, the information being based on the operation input information, to the control device as an operation command. The control device includes: a first calculator that calculates the length of the actuator on the basis of the operation command; and a drive circuit that produces the drive signal on the basis of information from the first calculator.Type: ApplicationFiled: September 28, 2018Publication date: March 5, 2020Applicant: NSK LTD.Inventors: Daisuke GUNJI, Hiroyasu KUMAGAI
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Publication number: 20200072290Abstract: The present invention provides a rolling bearing unit for supporting wheel that is able to suppress increase in the dimension in the axial direction due to the installation of a generator and a wireless communication apparatus to a minimum, supply sufficient electric power to a sensor attached to a wheel, and wirelessly transmit output signals of the sensor to an electronic apparatus on the vehicle body. The hub 17 comprises an inner recessed portion 29 on the inner diameter side of the inside portion in the axial direction which has a cylindrical fitting surface section 30 on the inner peripheral surface and is coaxial with the center axis of the hub 17, and a supporting member 67 is supported by and fastened to the inside of the inner recessed portion in a state where the hollow cylindrical supporting member 67 fits the cylindrical guide surface section 70 that is provided in the outer peripheral surface to the fitting surface section 30.Type: ApplicationFiled: June 20, 2018Publication date: March 5, 2020Inventors: Daisuke GUNJI, Fumiaki SODA
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Publication number: 20190389467Abstract: An electric vehicle drive apparatus includes a first motor, a second motor, a speed change mechanism coupled to the first motor and the second motor, and a controller controlling operation of the first motor and the second motor. The speed change mechanism includes a first planetary gear mechanism, a second planetary gear mechanism, and a one-way clutch that limits a rotation direction of a first carrier of the first planetary gear mechanism to a certain forward rotation direction. When rotating the first motor in a backward rotation direction opposite to the certain forward rotation direction and rotating the second motor in the forward rotation direction, the controller determines rotation speeds of the first motor and the second motor within a range indicated by Expression (1).Type: ApplicationFiled: September 15, 2017Publication date: December 26, 2019Applicant: NSK LTD.Inventors: Ryuho MORITA, Yasuyuki MATSUDA, Daisuke GUNJI, Mitsuru OIKE, Shin YAMAMOTO
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Publication number: 20190375288Abstract: An electric vehicle driving device includes a first motor that includes a first rotor, a first stator, and a first coil, a second motor that includes a second rotor, a second stator, and a second coil, and a transmission device to which power of at least one of the first motor and the second motor is transmitted. A plane passing through a first end portion located on the endmost side in an axial direction among an end portion of the first rotor in the axial direction, an end portion of the first stator in the axial direction, and an end portion of the first coil in the axial direction and being orthogonal to the rotation axis is a first plane.Type: ApplicationFiled: June 5, 2018Publication date: December 12, 2019Applicant: NSK LTD.Inventors: Yasuyuki MATSUDA, Daisuke GUNJI, Shin YAMAMOTO
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Patent number: 10502753Abstract: A charger incorporated in a vehicle wheel supporting rolling bearing unit detects an output voltage of an electric generator and calculates a rotation speed of a hub. When a rotation speed of the hub is in a low speed state where a sensor and a wireless communication device are operated by electric power supplied 5 by a battery, a frequency of wireless communication performed between the wireless communication device and a calculator disposed on a vehicle body side is changed according to the rotation speed of the hub or a traveling speed of a vehicle.Type: GrantFiled: October 31, 2016Date of Patent: December 10, 2019Assignee: NSK LTD.Inventors: Daisuke Gunji, Hiroshi Kawahara, Fumiaki Soda
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Patent number: 10480635Abstract: A rotation transmission device having a high torque measurement resolution is provided.Type: GrantFiled: February 20, 2017Date of Patent: November 19, 2019Assignee: NSK Ltd.Inventors: Yasuyuki Matsuda, Daisuke Gunji, Masafumi Hikida, Kazutaka Tanaka, Tooru Ueda, Tetsu Takehara, Tomoharu Saito, Hiroyasu Yoshioka, Yuka Kaneko
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Publication number: 20190316990Abstract: A wheel equipped with a sensing device includes a wheel and a sensing device. The sensing device includes a displacement extraction member, a to-be-detected part, and a detecting part. One radial end portion of the displacement extraction member is supported to one radial end-side portion of the wheel. The other radial end portion of the displacement extraction member is a free end. The to-be-detected part is provided to one of the other radial end-side portion of the wheel and the other radial end portion of the displacement extraction member. The detecting part is provided to the other of the other radial end-side portion of the wheel and the other radial end portion of the displacement extraction member, and is arranged in a vicinity of the to-be-detected part. An output of the detecting part changes in association with a change in positional relationship between the detecting part and the to-be-detected part.Type: ApplicationFiled: June 13, 2017Publication date: October 17, 2019Applicant: NSK LTD.Inventors: Hiroshi KAWAHARA, Daisuke GUNJI, Fumiaki SODA, Koji HASHIMOTO
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Patent number: 10444253Abstract: A charger incorporated in a vehicle wheel supporting rolling bearing unit detects an output voltage of an electric generator and calculates a rotation speed of a hub. When a rotation speed of the hub is in a low speed state where a sensor and a wireless communication device are operated by electric power supplied 5 by a battery, a frequency of wireless communication performed between the wireless communication device and a calculator disposed on a vehicle body side is changed according to the rotation speed of the hub or a traveling speed of a vehicle.Type: GrantFiled: October 31, 2016Date of Patent: October 15, 2019Assignee: NSK LTD.Inventors: Daisuke Gunji, Hiroshi Kawahara, Fumiaki Soda
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Patent number: 10421351Abstract: An in-wheel motor system can drive an in-wheel motor stably, and also allows power feeding from the road surface, even when transmission and reception coils are misaligned. An in-wheel motor system (1) includes a power transmitter (100) that utilizes a resonance phenomenon using a magnetic field. The power transmitter (100) transmits power (P) wirelessly from the vehicle body to an in-wheel motor (10) mounted in a wheel. The in-wheel motor system (1) may also include a communication interface (110) that communicates between the vehicle body and the wheel, and the communication interface (110) may transmit a control signal (CTL) for driving the in-wheel motor.Type: GrantFiled: February 16, 2015Date of Patent: September 24, 2019Assignees: THE UNIVERSITY OF TOKYO, NSK Ltd., TOKYO ELECTRIC MFG. CO., LTD.Inventors: Hiroshi Fujimoto, Takehiro Imura, Gaku Yamamoto, Daisuke Gunji, Motoki Sato
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Publication number: 20190283612Abstract: An electric vehicle drive device includes: a first motor; a second motor; a transmission mechanism coupled to the first motor and the second motor; and a control unit configured to control operation of the first motor and the second motor based on a drive signal. The transmission mechanism includes: a sun gear shaft coupled to the first motor; a first planetary gear mechanism; a second planetary gear mechanism; and a one-way clutch configured to restrict a rotation direction of a first carrier to a predetermined positive rotation direction. The drive signal includes gear change information indicating a first state in which the second motor is controlled based on torque or a second state in which the second motor is controlled based on rotation speed, and throttle information indicating an acceleration of rotation speed of a wheel.Type: ApplicationFiled: September 15, 2017Publication date: September 19, 2019Applicant: NSK LTD.Inventors: Ryuho MORITA, Yasuyuki MATSUDA, Mitsuru OIKE, Daisuke GUNJI, Shin YAMAMOTO
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Patent number: 10386253Abstract: A vehicle wheel supporting rolling bearing unit includes a stationary side bearing ring member, a rotation side bearing ring member, and plural rolling elements. The rotation side bearing ring member is provided with a first acceleration sensor, a second acceleration sensor, and a third acceleration sensor which are fixed on a virtual plane orthogonal to a center axis of the rotation side bearing ring member. The first acceleration sensor and the second acceleration sensor are arranged on a virtual line passing through a rotation center of the rotation side bearing ring member with a same distance from the rotation center while detection directions thereof are directed in a radial direction and are opposite to each other in the radial direction. The third acceleration sensor is arranged such that a detection direction thereof is non-parallel to the detection directions of the first acceleration sensor and the second acceleration sensor.Type: GrantFiled: October 27, 2016Date of Patent: August 20, 2019Assignee: NSK LTD.Inventors: Hiroki Hamada, Yasuyuki Matsuda, Masafumi Hikida, Hiroshi Kawahara, Daisuke Gunji
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Publication number: 20180372769Abstract: A charger incorporated in a vehicle wheel supporting rolling bearing unit detects an output voltage of an electric generator and calculates a rotation speed of a hub. When a rotation speed of the hub is in a low speed state where a sensor and a wireless communication device are operated by electric power supplied by a battery, a frequency of wireless communication performed between the wireless communication device and a calculator disposed on a vehicle body side is changed according to the rotation speed of the hub or a traveling speed of a vehicle.Type: ApplicationFiled: October 31, 2016Publication date: December 27, 2018Applicant: NSK LTD.Inventors: Daisuke GUNJI, Hiroshi KAWAHARA, Fumiaki SODA
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Publication number: 20180361789Abstract: An internal gear configuring a reduction gear is supported and fixed to a rotation side flange provided on an axially outer end portion of a hub, and the hub is rotationally driven based on a driving force input through the internal gear. Accordingly, since a drive shaft for rotationally driving the hub is not necessarily connected to a center hole of the hub, an electric generator and a wireless communication device can be disposed in an accommodating space having a large space provided on an axially inner side of the hub.Type: ApplicationFiled: October 31, 2016Publication date: December 20, 2018Applicant: NSK LTD.Inventors: Daisuke GUNJI, Yasuyuki MATSUDA
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Publication number: 20180313708Abstract: A vehicle wheel supporting rolling bearing unit includes a stationary side bearing ring member, a rotation side bearing ring member, and plural rolling elements. The rotation side bearing ring member is provided with a first acceleration sensor, a second acceleration sensor, and a third acceleration sensor which are fixed on a virtual plane orthogonal to a center axis of the rotation side bearing ring member. The first acceleration sensor and the second acceleration sensor are arranged on a virtual line passing through a rotation center of the rotation side bearing ring member with a same distance from the rotation center while detection directions thereof are directed in a radial direction and are opposite to each other in the radial direction. The third acceleration sensor is arranged such that a detection direction thereof is non-parallel to the detection directions of the first acceleration sensor and the second acceleration sensor.Type: ApplicationFiled: October 27, 2016Publication date: November 1, 2018Applicant: NSK LTD.Inventors: Hiroki HAMADA, Yasuyuki MATSUDA, Masafumi HIKIDA, Hiroshi KAWAHARA, Daisuke GUNJI
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Publication number: 20180285627Abstract: There are provided an object recognition unit of recognizing a target object in sequentially acquired images, a tracking unit of performing tracking on the sequentially acquired images for the recognized target object, and a storage controller of controlling so as to store in a first storage device the sequentially acquired images. The tracking unit further performs tracking for the target object on stored images, that are acquired before the target object is recognized by the object recognition unit in the sequentially acquired images, and are stored in the first storage device. The storage controller controls so as to store in a second storage device different from the first storage device, images in which the target object is tracked by the tracking unit of the sequentially acquired images, and images in which the target object is tracked by the tracking unit of the stored images.Type: ApplicationFiled: March 26, 2018Publication date: October 4, 2018Inventor: Daisuke Gunji
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Publication number: 20180111473Abstract: An in-wheel motor system can drive an in-wheel motor stably, and also allows power feeding from the road surface, even when transmission and reception coils are misaligned. An in-wheel motor system (1) includes a power transmitter (100) that utilizes a resonance phenomenon using a magnetic field. The power transmitter (100) transmits power (P) wirelessly from the vehicle body to an in-wheel motor (10) mounted in a wheel. The in-wheel motor system (1) may also include a communication interface (110) that communicates between the vehicle body and the wheel, and the communication interface (110) may transmit a control signal (CTL) for driving the in-wheel motor.Type: ApplicationFiled: February 16, 2015Publication date: April 26, 2018Applicants: THE UNIVERSITY OF TOKYO, NSK Ltd., TOYO ELECTRIC MFG. CO., LTD.Inventors: Hiroshi FUJIMOTO, Takehiro IMURA, Gaku YAMAMOTO, Daisuke GUNJI, Motoki SATO
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Publication number: 20170227111Abstract: A rotation transmission device having a high torque measurement resolution is provided.Type: ApplicationFiled: February 20, 2017Publication date: August 10, 2017Inventors: Yasuyuki MATSUDA, Daisuke Gunji, Masafumi Hikida, Kazutaka Tanaka, Tooru Ueda, Tetsu Takehara, Tomoharu Saito, Hiroyasu Yoshioka, Yuka Kaneko
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Patent number: 9625332Abstract: In order to implement a structure capable of improving the resolution of torque measurement while preventing the plastic deformation of a torsion bar (15), an input-side stopper (61) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an input-side rotating body (55) that includes an input shaft (13) and an input gear (7), and an output-side stopper (63) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an output-side rotating body (56) that includes an output shaft (14) and an output gear (8). The input-side stopper (61) and the output-side stopper (63) are combined so as to be engaged to be able to transmit torque only when the torsional angle within the elastic range of the torsion bar (15) reaches a predetermined amount.Type: GrantFiled: September 3, 2014Date of Patent: April 18, 2017Assignee: NSK Ltd.Inventors: Tomoharu Saito, Yasuyuki Matsuda, Daisuke Gunji, Masafumi Hikida, Kazutaka Tanaka, Tohru Ueda, Yuka Kaneko, Tetsu Takehara, Hiroyasu Yoshioka
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Publication number: 20170008385Abstract: An in-wheel motor system can drive an in-wheel motor stably, and also allows power feeding from the road surface, even when transmission and reception coils are misaligned. An in-wheel motor system (1) includes a power transmitter (100) that utilizes a resonance phenomenon using a magnetic field. The power transmitter (100) transmits power (P) wirelessly from the vehicle body to an in-wheel motor (10) mounted in a wheel. The in-wheel motor system (1) may also include a communication interface (110) that communicates between the vehicle body and the wheel, and the communication interface (110) may transmit a control signal (CTL) for driving the in-wheel motor.Type: ApplicationFiled: February 16, 2015Publication date: January 12, 2017Applicants: THE UNIVERSITY OF TOKYO, NSK Ltd., TOYO ELECTRIC MFG. CO., LTD.Inventors: Hiroshi FUJIMOTO, Takehiro IMURA, Gaku YAMAMOTO, Daisuke GUNJI, Motoki SATO