Patents by Inventor Tsutomu Nakamura
Tsutomu Nakamura 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: 20170351247Abstract: A motor control device includes: a force command unit that designates a force to be applied to a workpiece to be machined by a machining device having a motor as a driving source; a force detecting unit that detects the force applied to the workpiece; a velocity-command calculating unit that calculates a velocity command based on the designated force and the detected force; a torque-command calculating unit that calculates a torque command based on the velocity command and the velocity of the motor; a motor control unit that controls the motor based on the torque command; a determining unit that determines the machining stage of the workpiece based on the detected force; and a gain changing unit that changes at least one of gains individually provided in the velocity-command calculating unit and the torque-command calculating unit in accordance with the determined machining stage.Type: ApplicationFiled: May 23, 2017Publication date: December 7, 2017Inventors: Tsutomu NAKAMURA, Satoshi IKAI
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Patent number: 9798295Abstract: A motor controller according to one aspect of the present invention is a motor controller for controlling a servo motor that drives a machine, including: a position command unit for outputting a position command of the machine; a position detector for detecting the position of the machine; a position controller for generating a motor velocity command based on the position command output by the position command unit and the machine position detected by the position detector; and a velocity controller for controlling the motor velocity in accordance with the motor velocity command, and is constructed such that the position controller includes a filter F(s) that approximates the inverse characteristic of the transfer characteristic from the motor velocity command to the machine velocity.Type: GrantFiled: February 24, 2016Date of Patent: October 24, 2017Assignee: FANUC CORPORATIONInventors: Tsutomu Nakamura, Satoshi Ikai
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Patent number: 9785125Abstract: A motor control device includes a first position detecting unit for detecting a position of a movable part, a second position detecting unit for detecting a position of a driven part, an error computing unit for computing an error between a first position detection value detected by the first position detecting unit and a second position detection value detected by the second position detecting unit, a memory unit for memorizing, as an initial error, an error computed when the movable part engages with the driven part, a compensation amount computing unit for computing a backlash compensation amount for compensating backlash, a compensation gain computing unit for computing a compensation gain based on the acceleration command, and a compensation amount computing unit for computing the backlash compensation amount using the compensation gain.Type: GrantFiled: October 27, 2016Date of Patent: October 10, 2017Assignee: FANUC CORPORATIONInventors: Tsutomu Nakamura, Satoshi Ikai
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Publication number: 20170277150Abstract: A motor controller according to the present invention includes a position command unit for commanding the position of a driven unit, a compensation filter unit for compensating a position command, and a servo control unit for controlling the operation of a servomotor based on a compensated position command. The compensation filter unit includes an inverse characteristic filter for approximating an inverse characteristic of a transfer characteristic from a motor position to a mechanical position, and a high frequency cutoff filter for reducing a high frequency component of the position command. The inverse characteristic filter is a filter for reducing a gain at a mechanical resonance frequency ?0. The high frequency cutoff filter has a constant “a” times high frequency cutoff frequency a?0 using a constant “a” of 1 or more, with respect to the mechanical resonance frequency ?0 determined in the inverse characteristic filter.Type: ApplicationFiled: March 14, 2017Publication date: September 28, 2017Applicant: FANUC CORPORATIONInventors: Tsutomu Nakamura, Satoshi Ikai
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Patent number: 9766614Abstract: A motor control apparatus of the present invention is a motor control apparatus for compensating elastic deformation between a servo motor and a driven part, driven by the servo motor, which includes a position command generator for generating a position command of the motor, a compensation filter for compensating the position command generated by the position command generator and a servo control unit for controlling the movement of the motor based on a position command after compensation, i.e., the compensated position command by the compensation filter, and is constructed such that the compensation filter includes a filter F(s) having an inertia JL of the driven part, a stiffness coefficient K of an elastically deformable part and a damping coefficient C of the elastically deformable part as the elements of filter coefficients.Type: GrantFiled: January 15, 2016Date of Patent: September 19, 2017Assignee: FANUC CORPORATIONInventors: Tsutomu Nakamura, Satoshi Ikai
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Patent number: 9760082Abstract: A motor control apparatus includes an error calculation unit which calculates an error between a position of a movable unit and a position of a driven unit, a memory unit which memorizes the error in association with a torque command value as an initial error, and a compensation amountcompensation amount calculation unit which calculates a compensation amountcompensation amount for compensating an elastic deformation amount of an elastic factor between the movable unit and the driven unit. The compensation amountcompensation amount calculation unit calculates the compensation amountcompensation amount based on the initial error held by the memory unit, the torque command value held in association with the initial error, and a torque command value calculated by a torque command calculation unit when a motor rotates reversely.Type: GrantFiled: October 6, 2015Date of Patent: September 12, 2017Assignee: FANUC CORPORATIONInventors: Satoshi Ikai, Tsutomu Nakamura
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Publication number: 20170130341Abstract: A corrosion protection cathode using an external power supply in which a reinforcing layer formed of a fiber base material is laminated with an adhesive layer on one surface of a conductive layer formed of a graphite sheet, and an electrolyte layer of an electrolyte-containing resin formed in a sheet shape and having adhesive power such that the layer is capable of being adhered to the conductive layer and to a surface layer of an object to be protected from corrosion is adhered by the adhesive power thereof to the other surface of the conductive layer, wherein the conductive layer always has a resistance value of 4? or less between any two points on the surface thereof on a side that comes into contact with the electrolyte layer.Type: ApplicationFiled: March 31, 2015Publication date: May 11, 2017Inventors: Jun SUZUKI, Yasuto ISHIKAWA, Hirokazu IIZUKA, Tsutomu NAKAMURA, Norimasa MIMURA, Yuichi FUTAKI
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Publication number: 20170123384Abstract: A motor control device includes a first position detecting unit for detecting a position of a movable part, a second position detecting unit for detecting a position of a driven part, an error computing unit for computing an error between a first position detection value detected by the first position detecting unit and a second position detection value detected by the second position detecting unit, a memory unit for memorizing, as an initial error, an error computed when the movable part engages with the driven part, a compensation amount computing unit for computing a backlash compensation amount for compensating backlash, a compensation gain computing unit for computing a compensation gain based on the acceleration command, and a compensation amount computing unit for computing the backlash compensation amount using the compensation gain.Type: ApplicationFiled: October 27, 2016Publication date: May 4, 2017Applicant: FANUC CORPORATIONInventors: Tsutomu Nakamura, Satoshi Ikai
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Patent number: 9541916Abstract: A motor control apparatus includes a error calculation unit which calculates a error between a first position detection value of a movable part and a second position detection value of a driven part, a storage unit which stores the errors when the movable part engages with the driven part in a first and second drive direction, as a first initial error and a second initial error, respectively, and a compensation calculation unit which calculates the amount of compensation to correct backlash and an elastic deformation. The compensation calculation unit calculates a command error based on the first initial error and the second initial error and a predetermined constant which is larger than 0 and not greater than 1 and calculates the amount of compensation by subtracting the current error calculated by the error calculation unit from the command error.Type: GrantFiled: April 29, 2015Date of Patent: January 10, 2017Assignee: FANUC CORPORATIONInventor: Tsutomu Nakamura
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Patent number: 9501054Abstract: A motor control system which uses position command values output from control parts for motors and feedback information from axes which are driven by the command values for feedback control of the axes in an environment in which when one or more axes among axes which are driven by motors are driven, the other axes receive interference, which motor control system calculates acceleration of an axis which is driven by a motor by a first control part, sends the calculated acceleration to a second control part using a communication device, multiplies the acceleration which was input at the second control part with a compensation gain to calculate a position compensating value which compensates the position of an axis, adds the calculated position compensating value to the position command value of the axis, and uses the compensated position command value to control the position of the axis.Type: GrantFiled: August 27, 2015Date of Patent: November 22, 2016Assignee: Fanuc CorporationInventors: Tsutomu Nakamura, Satoshi Ikai
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Publication number: 20160258935Abstract: A blood test device is configured to measure a blood count and an electrolyte in a blood sample. The blood test device includes: a sample placement section in which a blood sample containing an anticoagulant containing a salt of ethylenediaminetetraacetic acid (EDTA) other than sodium salt, potassium salt, or calcium salt of EDTA is placed; and a measurement section by which measurement of a blood count and an electrolyte is carried out for the blood sample placed in the sample placement section.Type: ApplicationFiled: March 2, 2016Publication date: September 8, 2016Inventor: Tsutomu Nakamura
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Publication number: 20160252896Abstract: A motor controller according to one aspect of the present invention is a motor controller for controlling a servo motor that drives a machine, including: a position command unit for outputting a position command of the machine; a position detector for detecting the position of the machine; a position controller for generating a motor velocity command based on the position command output by the position command unit and the machine position detected by the position detector; and a velocity controller for controlling the motor velocity in accordance with the motor velocity command, and is constructed such that the position controller includes a filter F(s) that approximates the inverse characteristic of the transfer characteristic from the motor velocity command to the machine velocity.Type: ApplicationFiled: February 24, 2016Publication date: September 1, 2016Applicant: FANUC CORPORATIONInventors: Tsutomu Nakamura, Satoshi Ikai
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Publication number: 20160209829Abstract: A motor control apparatus of the present invention is a motor control apparatus for compensating elastic deformation between a servo motor and a driven part, driven by the servo motor, which includes a position command generator for generating a position command of the motor, a compensation filter for compensating the position command generated by the position command generator and a servo control unit for controlling the movement of the motor based on a position command after compensation, i.e., the compensated position command by the compensation filter, and is constructed such that the compensation filter includes a filter F(s) having an inertia JL of the driven part, a stiffness coefficient K of an elastically deformable part and a damping coefficient C of the elastically deformable part as the elements of filter coefficients.Type: ApplicationFiled: January 15, 2016Publication date: July 21, 2016Inventors: Tsutomu Nakamura, Satoshi Ikai
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Patent number: 9315906Abstract: To provide an anode, corrosion-protecting structure of a concrete constructions using this, and a corrosion protection method capable of protecting electrical corrosion, with little generation of gas due to electrolysis of water or chlorine compounds, by decreasing as far as possible the amount of processing performed on the structural body in on-site construction work and suppressing the voltage that is conducted therethrough to a low level. [Solution] A corrosion-protecting structure (1) is constituted by attaching an anode (10) to the surface layer (3) of a corrosion-protecting body (4) through a first electrolyte layer (12) on one face of a conductive layer (11) formed as a sheet. The electrolyte is formed as a sheet. The first electrolyte layer (12) having adhesiveness is attached to the conductive layer (11) and the surface layer (3) of the corrosion-protecting body (4).Type: GrantFiled: August 24, 2012Date of Patent: April 19, 2016Assignee: Fujimori Kogyo Co., Ltd.Inventors: Yasuto Ishikawa, Shirou Yamamoto, Hirokazu Iiduka, Jun Suzuki, Tsutomu Nakamura, Norimasa Mimura, Yuichi Futaki
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Publication number: 20160098031Abstract: A motor control apparatus includes an error calculation unit which calculates an error between a position of a movable unit and a position of a driven unit, a memory unit which memorizes the error in association with a torque command value as an initial error, and a compensation amountcompensation amount calculation unit which calculates a compensation amountcompensation amount for compensating an elastic deformation amount of an elastic factor between the movable unit and the driven unit. The compensation amountcompensation amount calculation unit calculates the compensation amountcompensation amount based on the initial error held by the memory unit, the torque command value held in association with the initial error, and a torque command value calculated by a torque command calculation unit when a motor rotates reversely.Type: ApplicationFiled: October 6, 2015Publication date: April 7, 2016Inventors: Satoshi Ikai, Tsutomu Nakamura
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Patent number: 9289236Abstract: This mucosa separation apparatus includes a first insertion portion inserted to the interior of a subject, an expansion portion disposed on a head portion of the first insertion portion, and which expands by infusion of a fluid, a passage formed within the first insertion portion and connected to the expansion portion, for supplying the fluid to the expansion portion, and a curving portion which makes a head portion of an instrument inserted to the interior of the subject curve with respect to a part of the instrument which is closer to a base portion of the instrument than the head portion thereof.Type: GrantFiled: November 26, 2007Date of Patent: March 22, 2016Assignee: OLYMPUS CORPORATIONInventors: Akihito Sadamasa, Yasuo Miyano, Yutaka Yanuma, Ichiro Takahashi, Kenji Shibaki, Tsutomu Nakamura, Tsuyoshi Nakagawa, Yasuhito Kura
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Patent number: 9287027Abstract: An objective of the present invention is to provide a rare earth metal-based permanent magnet with improved adhesion properties. A rare earth metal-based permanent magnet of the present invention as a means for achieving the objective has a laminated plating film, and is characterized in that the plating film comprises as an outermost surface layer a SnCu alloy plating film having a film thickness in a range from 0.1 ?m to 2 ?m, the composition of the SnCu alloy plating film is 35 mass % or more but less than 55 mass % of Sn and the rest being Cu, and a base plating film having two or more layers including at least a Ni plating film and a Cu plating film which are formed as the lower layer under the SnCu alloy plating film, and among the base plating film, the Ni plating film is located just below the SnCu alloy plating film.Type: GrantFiled: May 14, 2008Date of Patent: March 15, 2016Assignee: HITACHI METALS, LTD.Inventors: Yukimitsu Miyao, Tsutomu Nakamura
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Publication number: 20160062325Abstract: A motor control system which uses position command values output from control parts for motors and feedback information from axes which are driven by the command values for feedback control of the axes in an environment in which when one or more axes among axes which are driven by motors are driven, the other axes receive interference, which motor control system calculates acceleration of an axis which is driven by a motor by a first control part, sends the calculated acceleration to a second control part using a communication device, multiplies the acceleration which was input at the second control part with a compensation gain to calculate a position compensating value which compensates the position of an axis, adds the calculated position compensating value to the position command value of the axis, and uses the compensated position command value to control the position of the axis.Type: ApplicationFiled: August 27, 2015Publication date: March 3, 2016Inventors: Tsutomu Nakamura, Satoshi Ikai
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Publication number: 20150362911Abstract: A motor control apparatus includes a error calculation unit which calculates a error between a first position detection value of a movable part and a second position detection value of a driven part, a storage unit which stores the errors when the movable part engages with the driven part in a first and second drive direction, as a first initial error and a second initial error, respectively, and a compensation calculation unit which calculates the amount of compensation to correct backlash and an elastic deformation. The compensation calculation unit calculates a command error based on the first initial error and the second initial error and a predetermined constant which is larger than 0 and not greater than 1 and calculates the amount of compensation by subtracting the current error calculated by the error calculation unit from the command error.Type: ApplicationFiled: April 29, 2015Publication date: December 17, 2015Inventor: Tsutomu NAKAMURA
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Patent number: 9195227Abstract: A motor control device includes a position command generating unit, a difference calculating unit for calculating a difference between a positional detection value of a movable unit and a positional detection value of a driven unit, a retaining unit for retaining, as an engaging difference, the difference when the movable unit is moved in a first or second direction to engage with the driven unit, in association with the first direction and the second direction, and a compensation amount calculating unit for calculating a backlash compensation amount based on the difference calculated by the difference calculating unit and the engaging difference retained by the retaining unit. It is determined whether or not the movable unit is engaged with the driven unit by comparing a movement amount of the driven unit with a threshold.Type: GrantFiled: January 9, 2014Date of Patent: November 24, 2015Assignee: Fanuc CorporationInventors: Satoshi Ikai, Tsutomu Nakamura