Patents by Inventor Katsuhiro Ikegami
Katsuhiro Ikegami 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: 20210381195Abstract: A work machine capable of saving works by an operator during traveling is provided. The work machine includes a vehicular main body including a traveling unit, a work implement attached to the vehicular main body, and a controller that automatically controls operations by the work implement. The controller cancels automatic control of operations by the work implement based on a traveling state of the traveling unit.Type: ApplicationFiled: December 10, 2019Publication date: December 9, 2021Applicant: KOMATSU LTD.Inventors: Atsushi MURA, Haruki NISHIGUCHI, Hayato HISA, Hiromu DAMBAYASHI, Akihiko TERAMURA, Kazuki TAKEHARA, Katsuhiro IKEGAMI
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Patent number: 9976286Abstract: A work machine includes: first working equipment with first working equipment parameter; second working equipment including a parallel link and being attachable to the first working equipment; a swing angle detector that detects swing angle information of the first working equipment; an attitude calculating unit that calculates an attitude of the first working equipment based on the detected swing angle information of the first working equipment; a working equipment parameter storage that stores the first working equipment parameter defined for a component of the first working equipment; a correction information acquiring unit that acquires information on the second working equipment as correction information; and a working equipment parameter correction unit that corrects the first working equipment parameter based on the correction information on the second working equipment acquired by the correction information acquiring unit.Type: GrantFiled: October 30, 2015Date of Patent: May 22, 2018Assignee: Komatsu Ltd.Inventors: Masanobu Seki, Tsutomu Iwamura, Katsuhiro Ikegami, Masashi Ichihara
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Patent number: 9783961Abstract: The present invention includes a stroke sensor which is arranged on a hydraulic cylinder and measures a stroke length of the hydraulic cylinder; a rotary encoder and a magnetic force sensor which measure a reset reference point to reset a value of the stroke length measured by the stroke sensor; a stroke end detection processing unit which detects a stroke end position of the hydraulic cylinder; a calibration processing unit which calibrates the measured value of the stroke length when the reset reference point and/or the stroke end position is detected; an HMI monitor which displays an entire work machine mounted with the hydraulic cylinder when an initial calibration work for the hydraulic cylinder is carried out; and a highlight display processing unit that highlights a moving portion to drive a hydraulic cylinder to be calibrated along with an indication of a driving direction.Type: GrantFiled: April 12, 2013Date of Patent: October 10, 2017Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Yoshiki Kami, Yuki Shimano, Hayato Matsumoto
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Publication number: 20170260717Abstract: A work machine includes: first working equipment with first working equipment parameter; second working equipment including a parallel link and being attachable to the first working equipment; a swing angle detector that detects swing angle information of the first working equipment; an attitude calculating unit that calculates an attitude of the first working equipment based on the detected swing angle information of the first working equipment; a working equipment parameter storage that stores the first working equipment parameter defined for a component of the first working equipment; a correction information acquiring unit that acquires information on the second working equipment as correction information; and a working equipment parameter correction unit that corrects the first working equipment parameter based on the correction information on the second working equipment acquired by the correction information acquiring unit.Type: ApplicationFiled: October 30, 2015Publication date: September 14, 2017Inventors: Masanobu Seki, Tsutomu Iwamura, Katsuhiro Ikegami, Masashi Ichihara
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Patent number: 9689140Abstract: A construction machine control system for a construction machine that includes a work machine including a boom, an arm, and a bucket includes: an adjusting device having a movable spool and being capable of adjusting an amount of operating oil supplied to a hydraulic cylinder that drives the work machine with movement of the spool; an operation command unit adjusting the spool; a storage unit storing a plurality of pieces of correlation data indicating a relation between a cylinder speed of the hydraulic cylinder and an operation command value of operating the hydraulic cylinder according to a type of the bucket; an acquiring unit acquiring type data indicating the type of the bucket; and a control unit selecting one piece of correlation data from the plurality of pieces of correlation data based on the type data and controlling the operation command value based on the selected correlation data.Type: GrantFiled: March 24, 2015Date of Patent: June 27, 2017Assignee: Komatsu Ltd.Inventors: Akinori Baba, Katsuhiro Ikegami, Takeshi Takaura, Masashi Ichihara, Yuki Shimano
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Patent number: 9689145Abstract: A hydraulic excavator is provided with a tilt cylinder disposition data creating unit and a bucket information computing unit. The tilt cylinder disposition data creating unit creates tilt cylinder disposition data which indicates that a disposition of a tilt cylinder is either a first disposition in which a bucket is rotated in the clockwise direction due to extension or a second disposition in which the bucket is rotated in the clockwise direction due to contraction, when viewing the bucket from a vehicle body side. The bucket information computing unit obtains a tilt angle of the bucket based on the stroke length on the basis of the tilt cylinder disposition data.Type: GrantFiled: December 9, 2015Date of Patent: June 27, 2017Assignee: KOMATSU LTD.Inventors: Yuto Fujii, Tsutomu Iwamura, Daiki Arimatsu, Katsuhiro Ikegami, Masanobu Seki
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Publication number: 20170167116Abstract: A hydraulic excavator is provided with a tilt cylinder disposition data creating unit and a bucket information computing unit. The tilt cylinder disposition data creating unit creates tilt cylinder disposition data which indicates that a disposition of a tilt cylinder is either a first disposition in which a bucket is rotated in the clockwise direction due to extension or a second disposition in which the bucket is rotated in the clockwise direction due to contraction, when viewing the bucket from a vehicle body side. The bucket information computing unit obtains a tilt angle of the bucket based on the stroke length on the basis of the tilt cylinder disposition data.Type: ApplicationFiled: December 9, 2015Publication date: June 15, 2017Inventors: Yuto FUJII, Tsutomu IWAMURA, Daiki ARIMATSU, Katsuhiro IKEGAMI, Masanobu SEKI
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Patent number: 9605412Abstract: A control system includes: a data acquisition unit that acquires an operation command value and data on a cylinder speed in a state where an operation command of operating a hydraulic cylinder is output; a deriving unit that derives an operation start operation command value when the hydraulic cylinder in a stopped state starts operating and slow-speed operation characteristics indicating a relation between the operation command value and the cylinder speed in a slow-speed area based on the data acquired by the data acquisition unit; a storage unit that stores the operation start operation command value and the slow-speed operation characteristics derived by the deriving unit; and a work machine control unit that controls a work machine based on information stored in the storage unit.Type: GrantFiled: March 24, 2015Date of Patent: March 28, 2017Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Yoshiki Kami, Akinori Baba, Takeshi Takaura
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Patent number: 9598841Abstract: A control system includes: a first pressure sensor disposed in a pilot oil passage between an operating device and a control valve and detecting pressure of pilot oil; a second pressure sensor disposed in the pilot oil passage between the control valve and a direction control valve and detecting the pressure of the pilot oil; a control valve controller controlling the control valve; a data acquisition unit acquiring data on a detection value of the first pressure sensor and a detection value of the second pressure sensor in a state where the pilot oil passage is opened by the control valve; and a correction unit correcting the detection value of the first pressure sensor or the second pressure sensor based on the data acquired by the data acquisition unit so that the detection value of the first pressure sensor is identical to the detection value of the second pressure sensor.Type: GrantFiled: March 24, 2015Date of Patent: March 21, 2017Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Akinori Baba, Yoshiki Kami
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Patent number: 9551133Abstract: A stroke operation calibration control device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; a malfunction detection unit outputting an error when the stroke length is in the predetermined measurement range; and a control unit prohibiting the reset until the stroke length has passed the reset reference point at power input time.Type: GrantFiled: April 12, 2013Date of Patent: January 24, 2017Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Yoshiki Kami, Yuki Shimano, Hayato Matsumoto
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Patent number: 9458597Abstract: A control system includes: a control valve control unit that controls a control valve; a data acquisition unit that acquires data on an operation command value and a cylinder speed in a state where an operation command for operating a hydraulic cylinder is output; and a deriving unit that derives operation characteristics in an operation direction of each of a plurality of hydraulic cylinders in relation to the operation command value based on the data acquired by the data acquisition unit. In acquisition of the data by the data acquisition unit, the control valve control unit controls a control valve of one pilot oil passage that is an acquisition object where the data is acquired among the plurality of pilot oil passages to open one pilot oil passage and controls control valves of the other pilot oil passages to close the other pilot oil passages.Type: GrantFiled: March 24, 2015Date of Patent: October 4, 2016Assignee: Kmoatsu Ltd.Inventors: Katsuhiro Ikegami, Satoshi Ito, Akinori Baba
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Publication number: 20160281331Abstract: A control system includes: a data acquisition unit that acquires an operation command value and data on a cylinder speed in a state where an operation command of operating a hydraulic cylinder is output; a deriving unit that derives an operation start operation command value when the hydraulic cylinder in a stopped state starts operating and slow-speed operation characteristics indicating a relation between the operation command value and the cylinder speed in a slow-speed area based on the data acquired by the data acquisition unit; a storage unit that stores the operation start operation command value and the slow-speed operation characteristics derived by the deriving unit; and a work machine control unit that controls a work machine based on information stored in the storage unit.Type: ApplicationFiled: March 24, 2015Publication date: September 29, 2016Inventors: Katsuhiro Ikegami, Yoshiki Kami, Akinori Baba, Takeshi Takaura
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Publication number: 20160273194Abstract: A control system includes: a first pressure sensor disposed in a pilot oil passage between an operating device and a control valve and detecting pressure of pilot oil; a second pressure sensor disposed in the pilot oil passage between the control valve and a direction control valve and detecting the pressure of the pilot oil; a control valve controller controlling the control valve; a data acquisition unit acquiring data on a detection value of the first pressure sensor and a detection value of the second pressure sensor in a state where the pilot oil passage is opened by the control valve; and a correction unit correcting the detection value of the first pressure sensor or the second pressure sensor based on the data acquired by the data acquisition unit so that the detection value of the first pressure sensor is identical to the detection value of the second pressure sensor.Type: ApplicationFiled: March 24, 2015Publication date: September 22, 2016Inventors: Katsuhiro Ikegami, Akinori Baba, Yoshiki Kami
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Patent number: 9447563Abstract: A stroke operation diagnosis supporting device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; and a monitor displaying on a screen at least the measurement value of the stroke length obtained by the stroke sensor and a calibration state obtained by the calibration process unit, wherein the monitor displays continuous time change of the measurement value of the stroke length obtained by the stroke sensor.Type: GrantFiled: April 12, 2013Date of Patent: September 20, 2016Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Yoshiki Kami, Yuki Shimano, Hayato Matsumoto
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Publication number: 20160265187Abstract: A construction machine control system for a construction machine that includes a work machine including a boom, an arm, and a bucket includes: an adjusting device having a movable spool and being capable of adjusting an amount of operating oil supplied to a hydraulic cylinder that drives the work machine with movement of the spool; an operation command unit adjusting the spool; a storage unit storing a plurality of pieces of correlation data indicating a relation between a cylinder speed of the hydraulic cylinder and an operation command value of operating the hydraulic cylinder according to a type of the bucket; an acquiring unit acquiring type data indicating the type of the bucket; and a control unit selecting one piece of correlation data from the plurality of pieces of correlation data based on the type data and controlling the operation command value based on the selected correlation data.Type: ApplicationFiled: March 24, 2015Publication date: September 15, 2016Inventors: Akinori Baba, Katsuhiro Ikegami, Takeshi Takaura, Masashi Ichihara, Yuki Shimano
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Patent number: 9347763Abstract: A hydraulic cylinder stroke operation diagnosis assisting device includes: movable portions that are sequentially supported by a vehicle body in a rotatable manner; a hydraulic cylinder between the vehicle body and each movable portion or between the movable portions to support the movable portions in a rotatable manner; a stroke sensor in the hydraulic cylinder to measure a stroke length of the hydraulic cylinder; a reset sensor measuring a reference reset point in which a value of the stroke length measured by the stroke sensor is reset; a stroke end detection unit detecting a stroke end position of the hydraulic cylinder; a calibration unit calibrating the measured value of the stroke length when the reference reset point and/or the stroke end position are detected; and a monitor displaying at least the measured value of the stroke length and a calibration state by the calibration unit.Type: GrantFiled: April 12, 2013Date of Patent: May 24, 2016Assignee: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Yoshiki Kami, Yuki Shimano, Yukinori Maeda
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Publication number: 20160138240Abstract: A control system includes: a control valve control unit that controls a control valve; a data acquisition unit that acquires data on an operation command value and a cylinder speed in a state where an operation command for operating a hydraulic cylinder is output; and a deriving unit that derives operation characteristics in an operation direction of each of a plurality of hydraulic cylinders in relation to the operation command value based on the data acquired by the data acquisition unit. In acquisition of the data by the data acquisition unit, the control valve control unit controls a control valve of one pilot oil passage that is an acquisition object where the data is acquired among the plurality of pilot oil passages to open one pilot oil passage and controls control valves of the other pilot oil passages to close the other pilot oil passages.Type: ApplicationFiled: March 24, 2015Publication date: May 19, 2016Applicant: KOMATSU LTD.Inventors: Katsuhiro Ikegami, Satoshi Ito, Akinori Baba
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Publication number: 20150299986Abstract: A stroke operation calibration control device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; a malfunction detection unit outputting an error when the stroke length is in the predetermined measurement range; and a control unit prohibiting the reset until the stroke length has passed the reset reference point at power input time.Type: ApplicationFiled: April 12, 2013Publication date: October 22, 2015Inventors: Katsuhiro Ikegami, Yoshiki Kami, Yuki Shimano, Hayato Matsumoto
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Publication number: 20150267382Abstract: A stroke operation diagnosis supporting device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; and a monitor displaying on a screen at least the measurement value of the stroke length obtained by the stroke sensor and a calibration state obtained by the calibration process unit, wherein the monitor displays continuous time change of the measurement value of the stroke length obtained by the stroke sensor.Type: ApplicationFiled: April 12, 2013Publication date: September 24, 2015Applicant: Komatsu Ltd.Inventors: Katsuhiro Ikegami, Yoshiki Kami, Yuki Shimano, Hayato Matsumoto
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Publication number: 20150047427Abstract: A hydraulic cylinder stroke operation diagnosis assisting device includes: movable portions that are sequentially supported by a vehicle body in a rotatable manner; a hydraulic cylinder between the vehicle body and each movable portion or between the movable portions to support the movable portions in a rotatable manner; a stroke sensor in the hydraulic cylinder to measure a stroke length of the hydraulic cylinder; a reset sensor measuring a reference reset point in which a value of the stroke length measured by the stroke sensor is reset; a stroke end detection unit detecting a stroke end position of the hydraulic cylinder; a calibration unit calibrating the measured value of the stroke length when the reference reset point and/or the stroke end position are detected; and a monitor displaying at least the measured value of the stroke length and a calibration state by the calibration unit.Type: ApplicationFiled: April 12, 2013Publication date: February 19, 2015Applicant: KOMATSU LTD.Inventors: Katsuhiro Ikegami, Yoshiki Kami, Yuki Shimano, Yukinori Maeda