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11.发明公开公开(公告)号：US20230144985A1
公开(公告)日：2023-05-11
申请号：US17914551
申请日：2021-04-14
Applicant: Komatsu Ltd.
Inventor： Shunichiro Kondo , Yuto Fujii , Ken Tagami
Abstract: There is provided a positioning system for a work machine using RTK positioning that uses a satellite positioning system, the positioning system including: a sensor controller that is a calculation unit that calculates a position of an antenna, of the satellite positioning system, disposed in the work machine based on a position of working equipment, of the work machine, aligned with a known reference point PR positioned at a work site; and a monitor controller that is an initialization control unit that outputs a control command that causes a receiver, of the satellite positioning system, that performs positioning calculation by the RTK positioning to execute initialization processing of the positioning calculation in which an integer value bias of each satellite and the position of the antenna of the satellite positioning system are unknown, by using the calculated position of the antenna of the satellite positioning system.
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公开(公告)号：US10526765B2
公开(公告)日：2020-01-07
申请号：US15562925
申请日：2016-11-09
Applicant: KOMATSU LTD.
Inventor： Yuto Fujii , Haruki Nishiguchi
Abstract: A work vehicle includes a bucket which can perform a tilting operation with a hydraulic oil, a valve adjusting a flow rate of the hydraulic oil having the bucket perform the tilting operation, an electromagnetic proportional control valve generating a pilot pressure guided to the valve, a controller outputting a current to the electromagnetic proportional control valve, and a first sensor for detecting the tilting operation. The controller detects a horizontal state of the bucket based on an output from the first sensor. The controller adjusts a value for the current output to the electromagnetic proportional control valve after the horizontal state of the bucket is detected, and starts calibration of data for predicting an operation speed of the bucket in the tilting operation.
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公开(公告)号：US20170342680A1
公开(公告)日：2017-11-30
申请号：US15328584
申请日：2016-05-31
Applicant: Komatsu Ltd.
Inventor： Tsutomu Iwamura , Yuhei Yamamoto , Yuto Fujii , Takashi Yokoo , Yoshiro Iwasaki
CPC classification number: E02F3/435 , E02F3/32 , E02F3/3677 , E02F3/369 , E02F9/0866 , E02F9/16 , E02F9/22 , E02F9/2267 , E02F9/2271 , E02F9/2296 , E02F9/262 , E02F9/264 , G05D1/0278 , G05D2201/0202
Abstract: A work machine control system that controls a work machine including a working device having a working tool that rotates about a shaft line includes: a target construction shape generation unit that generates a target construction shape indicating a target shape of a construction target of the work machine; a target shape calculation unit that calculates a control target shape which is a target shape when controlling rotation of the working tool from the target construction shape and calculates an extended target shape obtained by extending the control target shape; and a working device control unit that controls the rotation of the working tool about the shaft line based on a distance between the working tool and the control target shape and the extended target shape.
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14.发明申请公开(公告)号：US20170342679A1
公开(公告)日：2017-11-30
申请号：US15326700
申请日：2016-05-31
Applicant: Komatsu Ltd.
Inventor： Tsutomu Iwamura , Jin Kitajima , Yoshiro Iwasaki , Yuto Fujii , Takashi Yokoo
CPC classification number: E02F3/435 , E02F3/32 , E02F3/3677 , E02F9/16 , E02F9/2004 , E02F9/2033 , E02F9/2267 , E02F9/2271 , E02F9/2285 , E02F9/2296 , E02F9/262 , G05D1/0278
Abstract: A construction machine control system includes: a target construction ground shape generation unit which generates a target construction ground shape indicating a target shape of an excavation target; a working device control instruction determination unit which outputs an instruction for driving the working device in a working device operation plane orthogonal to at least one of a boom axis, an arm axis, and a bucket axis based on an operation state of at least one of an arm and a bucket and a distance between the bucket and the target construction ground shape; and a tilting control instruction determination unit which outputs an instruction for performing a tilting control of the bucket about a tilting axis based on a tilting state of the bucket and the distance between the bucket and the target construction ground shape.
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公开(公告)号：US09689145B1
公开(公告)日：2017-06-27
申请号：US15100720
申请日：2015-12-09
Applicant: KOMATSU LTD.
Inventor： Yuto Fujii , Tsutomu Iwamura , Daiki Arimatsu , Katsuhiro Ikegami , Masanobu Seki
CPC classification number: E02F9/264 , E02F3/32 , E02F3/3681 , E02F3/425 , E02F9/265
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US09663917B2
公开(公告)日：2017-05-30
申请号：US15101106
申请日：2015-10-16
Applicant: KOMATSU LTD.
Inventor： Yuto Fujii , Tsutomu Iwamura , Masanobu Seki
CPC classification number: E02F3/3681 , E02F3/32 , E02F3/3677 , E02F3/40 , E02F3/435 , E02F9/264 , E02F9/265 , G01B21/02 , G01C15/12 , G01S19/45
Abstract: A hydraulic excavator is equipped with a bucket, a tilt cylinder, a fourth stroke sensor, and a bucket information computing unit. The bucket is able to rotate about the center of a tilt axis. The tilt cylinder causes the bucket to rotate about the center of the tilt axis. The fourth stroke sensor detects a stroke length of the tilt cylinder. The bucket information computing unit obtains a tilt angle of the bucket on the basis of the stroke length detected by the fourth stroke sensor.
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公开(公告)号：US10480160B2
公开(公告)日：2019-11-19
申请号：US15540077
申请日：2016-11-09
Applicant: KOMATSU LTD.
Inventor： Akira Tanishige , Yoshiki Kami , Takashi Yokoo , Yuto Fujii , Haruki Nishiguchi
Abstract: A main controller controlling an operation of a work vehicle includes a determination unit and an abnormal condition determination unit. The determination unit determines whether or not an attachment has a sensor based on information on an attachment. When the determination unit determines that the attachment has the sensor and when the abnormal condition determination unit cannot receive a signal from the sensor, the abnormal condition determination unit determines that an abnormal condition has occurred.
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公开(公告)号：US10358799B2
公开(公告)日：2019-07-23
申请号：US15561546
申请日：2016-11-09
Applicant: KOMATSU LTD.
Inventor： Yuto Fujii , Takashi Yokoo
Abstract: A work vehicle includes an operation apparatus for operating a work implement, a valve adjusting a flow rate of a hydraulic oil operating the work implement, an electromagnetic proportional control valve provided in a pilot oil path connecting a pilot oil pressure source and a pilot chamber of the valve to each other and generating a command pilot pressure with a source pressure input from the pilot oil pressure source being used as a primary pressure, and a main controller outputting a command current operating the electromagnetic proportional control valve in accordance with an operation of the operation apparatus. The main controller includes a data table storage unit storing data for predicting an operation speed of the work implement and a calibration unit calibrating data on the condition that an operation onto the operation apparatus is performed.
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公开(公告)号：US20180202129A1
公开(公告)日：2018-07-19
申请号：US15525359
申请日：2017-01-13
Applicant: Komatsu Ltd.
Inventor： Yuto Fujii , Kota Beppu
Abstract: A work machine control system includes: an acquisition unit configured to acquire a plurality of pieces of current topographical data of a work site where a work machine including a work unit performs work; a setting unit configured to set predetermined first current topographical data and second current topographical data from the plurality of pieces of current topographical data acquired by the acquisition unit; and an arithmetic unit configured to calculate a difference between the first current topographical data and the second current topographical data, and obtain revision data to revise the first current topographical data based on the difference and parameter information related to the current topography of the work site.
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公开(公告)号：US20180202128A1
公开(公告)日：2018-07-19
申请号：US15526104
申请日：2017-01-13
Applicant: Komatsu Ltd.
Inventor： Toru Kurakane , Yuto Fujii , Kota Beppu , Yoshio Koda
Abstract: A work machine control system includes: an acquisition unit configured to acquire a plurality of pieces of current topographical data indicating a current topography of a work site where a work machine performs work; and a combining unit configured to generate combined current topographical data of the work site in accordance with a predetermined rule based on the plurality of pieces of current topographical data acquired in the acquisition unit.
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