Patents by Inventor Hiromitsu Nagata
Hiromitsu Nagata 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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Patent number: 12214379Abstract: A vibratory actuator control apparatus includes a vibrating member, having an electro-mechanical energy conversion element, and a contact member that contacts the vibrating member. In a second case where the vibrating member and the contact member are brought from a stationary state to a stopped state, an operation sequentially passes through a third stage and a fourth stage. The third stage is for decelerating a relative movement driving speed by applying a driving voltage to the electro-mechanical energy conversion element while maintaining a control parameter of the driving voltage constant and increasing a driving frequency. The fourth stage is for decelerating the driving speed by applying the driving voltage to the electro-mechanical energy conversion element while maintaining the driving frequency constant and decreasing the control parameter of the driving voltage. A start frequency is set based on the driving frequency corresponding to a predetermined driving speed in the third stage.Type: GrantFiled: October 5, 2022Date of Patent: February 4, 2025Assignee: Canon Kabushiki KaishaInventors: Akio Atsuta, Hiromitsu Morita, Taiga Nagata
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Patent number: 12143055Abstract: An abnormality monitoring apparatus includes a drive circuit unit, a current detection unit, a current cutoff unit, a first control unit, and a second control unit. The drive circuit unit switches an energization to the motor winding. The current detection unit detects a motor current, which is a current flowing through the motor winding. The current cutoff unit cuts off the motor current. The first control unit has an energization control unit for controlling energization to the motor winding and an energization state notification unit for outputting an energization state signal according to an energization command. The second control unit is provided separately from the first control unit and has an abnormality monitoring unit configured to monitor an abnormality based on a detection value of the current detection unit and an energization state signal so as to perform fail-safe measure according to a monitoring result.Type: GrantFiled: August 18, 2022Date of Patent: November 12, 2024Assignee: DENSO CORPORATIONInventor: Hiromitsu Nagata
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Publication number: 20220393624Abstract: An abnormality monitoring apparatus includes a drive circuit unit, a current detection unit, a current cutoff unit, a first control unit, and a second control unit. The drive circuit unit switches an energization to the motor winding. The current detection unit detects a motor current, which is a current flowing through the motor winding. The current cutoff unit cuts off the motor current. The first control unit has an energization control unit for controlling energization to the motor winding and an energization state notification unit for outputting an energization state signal according to an energization command. The second control unit is provided separately from the first control unit and has an abnormality monitoring unit configured to monitor an abnormality based on a detection value of the current detection unit and an energization state signal so as to perform fail-safe measure according to a monitoring result.Type: ApplicationFiled: August 18, 2022Publication date: December 8, 2022Inventor: Hiromitsu NAGATA
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Patent number: 11396942Abstract: A shift range control device includes a signal receiver, an abnormality monitor, and a drive controller. The signal receiver acquires an encoder signal from an encoder capable of outputting three or more phase encoder signals having different phases. The abnormality monitor monitors an abnormality of the encoder. The drive controller controls drive of a motor by switching an energized phase of a motor winding so that a rotation position of the motor becomes a target rotation position according to a target shift range. When the abnormality of the encoder is detected, the driver controller drives the motor by faulty phase identification control to identify a faulty phase that is a phase in which an abnormality of the encoder signal occurs, and a normal phase in which the encoder signal is normal.Type: GrantFiled: April 8, 2021Date of Patent: July 26, 2022Assignees: DENSO CORPORATION, HONDA MOTOR CO., LTD.Inventors: Hiromitsu Nagata, Koji Sakaguchi, Jun Yamada, Masahiko Akiyama, Masashi Misawa, Kenshi Masuo
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Publication number: 20210222773Abstract: A shift range control device includes a signal receiver, an abnormality monitor, and a drive controller. The signal receiver acquires an encoder signal from an encoder capable of outputting three or more phase encoder signals having different phases. The abnormality monitor monitors an abnormality of the encoder. The drive controller controls drive of a motor by switching an energized phase of a motor winding so that a rotation position of the motor becomes a target rotation position according to a target shift range. When the abnormality of the encoder is detected, the driver controller drives the motor by faulty phase identification control to identify a faulty phase that is a phase in which an abnormality of the encoder signal occurs, and a normal phase in which the encoder signal is normal.Type: ApplicationFiled: April 8, 2021Publication date: July 22, 2021Inventors: Hiromitsu NAGATA, Koji SAKAGUCHI, Jun YAMADA, Masahiko AKIYAMA, Masashi MISAWA, Kenshi MASUO
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Patent number: 10523138Abstract: A motor control device includes: a state monitoring unit that detects a power supply abnormality in which a power is not normally supplied to at least one of a rotation sensor and a motor; an abnormality determination unit that detects an abnormality of the rotation sensor based on an output signal of the rotation sensor; and a decision unit that decides whether to confirm the abnormality of the rotation sensor based on a detection result of the state monitoring unit and a detection result of the abnormality determination unit. When the state monitoring unit detects the power supply abnormality, the decision unit does not decide the abnormality of the rotation sensor even when the abnormality determination unit detects the abnormality of the rotation sensor.Type: GrantFiled: February 13, 2017Date of Patent: December 31, 2019Assignee: DENSO CORPORATIONInventors: Hiromitsu Nagata, Seiji Nakayama, Jun Yamada
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Publication number: 20190103825Abstract: A motor control device includes: a state monitoring unit that detects a power supply abnormality in which a power is not normally supplied to at least one of a rotation sensor and a motor; an abnormality determination unit that detects an abnormality of the rotation sensor based on an output signal of the rotation sensor; and a decision unit that decides whether to confirm the abnormality of the rotation sensor based on a detection result of the state monitoring unit and a detection result of the abnormality determination unit. When the state monitoring unit detects the power supply abnormality, the decision unit does not decide the abnormality of the rotation sensor even when the abnormality determination unit detects the abnormality of the rotation sensor.Type: ApplicationFiled: February 13, 2017Publication date: April 4, 2019Inventors: Hiromitsu NAGATA, Seiji NAKAYAMA, Jun YAMADA
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Patent number: 10060527Abstract: During changing of a shift range (for example, from P-range to NotP-range), an SBW-ECU determines whether it is in a range-change delay condition (a switching completion time of the shift range is delayed than a normal switching completion time). When it is determined that it is in the range-change delay condition, it is determined whether a target range should be changed to a safer range (for example, P-range). As a result, when it is determined that the target range should be changed to the safer range, the target range is changed to the safer range. Thereby, even if a driver determines that the shift range cannot be changed before the switching completion of the shift range and the driver gets off the vehicle, the shift range can be changed to the safer range (P-range).Type: GrantFiled: February 16, 2016Date of Patent: August 28, 2018Assignee: DENSO CORPORATIONInventors: Hiromitsu Nagata, Jun Yamada
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Patent number: 9985568Abstract: An integrated IC provided in an SBW-ECU has plural functions such as a receiving function of receiving output signals of an encoder and a current supply function of supplying current to each phase of the motor. A microcomputer checks individually whether the signal receiving function and the current supply function are potentially abnormal and checks whether the integrated IC is abnormal based on the check results about the signal receiving function and the current supply function. For example, when it is determined that only the signal receiving function of the integrated IC is potentially abnormal, the encoder is determined to be abnormal. When it is determined that the signal receiving function and the current supply function of the integrated IC are both potentially abnormal, the integrated IC is determined to be abnormal.Type: GrantFiled: October 4, 2016Date of Patent: May 29, 2018Assignee: DENSO CORPORATIONInventors: Hiromitsu Nagata, Seiji Nakayama
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Publication number: 20170335960Abstract: During changing of a shift range (for example, from P-range to NotP-range), an SBW-ECU determines whether it is in a range-change delay condition (a switching completion time of the shift range is delayed than a normal switching completion time). When it is determined that it is in the range-change delay condition, it is determined whether a target range should be changed to a safer range (for example, P-range). As a result, when it is determined that the target range should be changed to the safer range, the target range is changed to the safer range. Thereby, even if a driver determines that the shift range cannot be changed before the switching completion of the shift range and the driver gets off the vehicle, the shift range can be changed to the safer range (P-range).Type: ApplicationFiled: February 16, 2016Publication date: November 23, 2017Inventors: Hiromitsu NAGATA, Jun YAMADA
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Patent number: 9762122Abstract: A load drive controlling device includes a dulling controller, a dulling adjuster, and a Proportional Integral (PI) controller. The dulling adjuster sets a first electric current value for a dulling adjustment operation according to a change trend of a target electric current value in an inductive load. The dulling adjuster performs the dulling adjustment operation on the first electric current and limits a dulled value based on a guard value. The PI controller performs a PI control based on a deviation between the dulled value and an actual value of the electric current. The dulling controller sets the first electric current value and the guard value according to a change trend of the target electric current value. In such a configuration, the load drive controlling device improves an electric current response while preventing an over-accumulation of an integration value.Type: GrantFiled: September 19, 2014Date of Patent: September 12, 2017Assignee: DENSO CORPORATIONInventors: Yuuta Mizuno, Fumihiko Nakane, Fuminori Suzuki, Hiromitsu Nagata
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Publication number: 20170104435Abstract: An integrated IC provided in an SBW-ECU has plural functions such as a receiving function of receiving output signals of an encoder and a current supply function of supplying current to each phase of the motor. A microcomputer checks individually whether the signal receiving function and the current supply function are potentially abnormal and checks whether the integrated IC is abnormal based on the check results about the signal receiving function and the current supply function. For example, when it is determined that only the signal receiving function of the integrated IC is potentially abnormal, the encoder is determined to be abnormal. When it is determined that the signal receiving function and the current supply function of the integrated IC are both potentially abnormal, the integrated IC is determined to be abnormal.Type: ApplicationFiled: October 4, 2016Publication date: April 13, 2017Inventors: Hiromitsu NAGATA, Seiji NAKAYAMA
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Patent number: 9169924Abstract: A control device for controlling an automatic transmission determines whether a fluid pressure of the operation fluid acting on a friction engagement element that is switched from a released-state to an engaged-state is in a fully-decreased state. If determined that the fluid pressure is not in a fully-decreased state, control of a manual valve is delayed. In such manner, the hydraulic circuit is switched by the manual valve after the full decrease of the fluid pressure of the operation fluid acting on the just-engaged friction engagement element. As a result, an abrupt rise of the fluid pressure is prevented and a shock in the automatic transmission is reduced.Type: GrantFiled: July 16, 2014Date of Patent: October 27, 2015Assignee: DENSO CORPORATIONInventors: Hiromitsu Nagata, Fuminori Suzuki
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Patent number: 9166520Abstract: A range switching device may switch a shift range despite resetting and restarting of a controller. When the controller is reset and restarted during a switching operation of the shift range and the shift range before or after being switched is a P range, the controller controls a motor to rotate the motor until a range switching mechanism abuts against a first limit position of a movable range of the range switching mechanism and learns a rotation position of the motor as a reference position of the motor. When the shift ranges before and after being switched are the ranges other that the P range, the controller controls the motor to rotate until the range switching mechanism abuts against a second limit position of the movable range and learns the rotation position of the motor as the reference position.Type: GrantFiled: January 7, 2014Date of Patent: October 20, 2015Assignee: DENSO CORPORATIONInventors: Hiromitsu Nagata, Jun Yamada, Kazuhiro Yoshida
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Patent number: 9124175Abstract: A load drive control device is provided, which includes a pulse generator for generating pulse signals with a duty ratio to drive an inductive load, a feedback setting section for setting the duty ratio for feedback, a detection setting section for setting the duty ratio for detection of a natural vibration frequency of the inductive load, a natural vibration frequency setting section for setting the natural vibration frequency of the inductive load based on an actual current value detected at setting the duty ratio for detection, and a selection section for selecting the feedback setting section as a duty ratio setting section at a normal time and for selecting the detection setting section as the duty ratio setting section when a condition for detecting the natural vibration frequency is satisfied.Type: GrantFiled: June 5, 2014Date of Patent: September 1, 2015Assignee: DENSO CORPORATIONInventors: Yuuta Mizuno, Fumihiko Nakane, Fuminori Suzuki, Hiromitsu Nagata
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Publication number: 20150088320Abstract: A load drive controlling device includes a dulling controller, a dulling adjuster, and a Proportional Integral (PI) controller. The dulling adjuster sets a first electric current value for a dulling adjustment operation according to a change trend of a target electric current value in an inductive load. The dulling adjuster performs the dulling adjustment operation on the first electric current and limits a dulled value based on a guard value. The PI controller performs a PI control based on a deviation between the dulled value and an actual value of the electric current. The dulling controller sets the first electric current value and the guard value according to a change trend of the target electric current value. In such a configuration, the load drive controlling device improves an electric current response while preventing an over-accumulation of an integration value.Type: ApplicationFiled: September 19, 2014Publication date: March 26, 2015Inventors: Yuuta MIZUNO, Fumihiko NAKANE, Fuminori SUZUKI, Hiromitsu NAGATA
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Publication number: 20150020632Abstract: A control device for controlling an automatic transmission determines whether a fluid pressure of the operation fluid acting on a friction engagement element that is switched from a released-state to an engaged-state is in a fully-decreased state. If determined that the fluid pressure is not in a fully-decreased state, control of a manual valve is delayed. In such manner, the hydraulic circuit is switched by the manual valve after the full decrease of the fluid pressure of the operation fluid acting on the just-engaged friction engagement element. As a result, an abrupt rise of the fluid pressure is prevented and a shock in the automatic transmission is reduced.Type: ApplicationFiled: July 16, 2014Publication date: January 22, 2015Inventors: Hiromitsu NAGATA, Fuminori SUZUKI
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Publication number: 20140375290Abstract: A load drive control device is provided, which includes a pulse generator for generating pulse signals with a duty ratio to drive an inductive load, a feedback setting section for setting the duty ratio for feedback, a detection setting section for setting the duty ratio for detection of a natural vibration frequency of the inductive load, a natural vibration frequency setting section for setting the natural vibration frequency of the inductive load based on an actual current value detected at setting the duty ratio for detection, and a selection section for selecting the feedback setting section as a duty ratio setting section at a normal time and for selecting the detection setting section as the duty ratio setting section when a condition for detecting the natural vibration frequency is satisfied.Type: ApplicationFiled: June 5, 2014Publication date: December 25, 2014Inventors: Yuuta MIZUNO, Fumihiko NAKANE, Fuminori SUZUKI, Hiromitsu NAGATA
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Publication number: 20140210395Abstract: A range switching device may switch a shift range despite resetting and restarting of a controller. When the controller is reset and restarted during a switching operation of the shift range and the shift range before or after being switched is a P range, the controller controls a motor to rotate the motor until a range switching mechanism abuts against a first limit position of a movable range of the range switching mechanism and learns a rotation position of the motor as a reference position of the motor. When the shift ranges before and after being switched are the ranges other that the P range, the controller controls the motor to rotate until the range switching mechanism abuts against a second limit position of the movable range and learns the rotation position of the motor as the reference position.Type: ApplicationFiled: January 7, 2014Publication date: July 31, 2014Applicant: Denso CorporationInventors: Hiromitsu NAGATA, Jun YAMADA, Kazuhiro YOSHIDA
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Patent number: 4520971Abstract: A double bearing type fishing reel which is provided with a reel mounting leg at an upper portion of a reel body, which reel mounting leg has a fishing rod mounting member and an operating lever pivotably connected to its base portion in such a manner that an operating portion of the lever is positioned under a front portion of the fishing rod mounting member, which operating lever is adapted to be drawn upward by the forefinger of the hand gripping the fishing rod mounting member and fishing rod. This reel permits the clutch operation and spool braking operation to be carried out quickly and easily, controlling the spool braking force to an arbitrary level, and reliably preventing backlash of the fishing line.Type: GrantFiled: May 28, 1982Date of Patent: June 4, 1985Assignee: Daiwa Seiko Inc.Inventor: Hiromitsu Nagata