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公开(公告)号：US11555294B2
公开(公告)日：2023-01-17
申请号：US16639798
申请日：2018-11-20
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Masafumi Hita , Yasuhiko Kanari
Abstract: When a machine-control ON/OFF switch is switched to the ON position, a controller outputs either a first control signal generated by an operation lever or a second control signal that operates a boom cylinder in accordance with a predetermined condition; when the ON/OFF switch is switched to the OFF position, the controller outputs the first control signal; when a control signal has been switched from one of the first control signal and the second control signal to the other control signal by the operation of the ON/OFF switch, the controller applies a rate limit to the control signal, and controls the boom cylinder on the basis of the control signal obtained after the limitation.
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公开(公告)号：US12203238B2
公开(公告)日：2025-01-21
申请号：US17438520
申请日：2020-09-25
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Shiho Izumi , Hideto Ishibashi , Shinichi Kotake , Shinji Ishihara , Yasuhiko Kanari
Abstract: A controller sets, as a satellite mask range, a range for which a work implement can become an obstacle when an antenna receives positioning signals from a plurality of positioning satellites on the basis of a position at which the antenna is installed, a movable range of the work implement, a posture of an upper swing structure, and an azimuth angle of the upper swing structure. The controller cancels the setting of the satellite mask range in a case where it has been determined, on the basis of satellite positioning condition data acquired from a receiver, that the setting of the satellite mask range leads to reduced precision of positioning computation by the receiver. In a case where the setting of the satellite mask range has been canceled, the receiver computes the position of the upper swing structure on the basis of the positioning signals transmitted from the plurality of positioning satellites.
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公开(公告)号：US20180282977A1
公开(公告)日：2018-10-04
申请号：US15846292
申请日：2017-12-19
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Kohei HIROMATSU , Shiho Izumi , Yasuhiko Kanari , Daito Sakai
Abstract: When a work implement is actuated in such a manner that a work point is located at each of a plurality of positions on a datum line, a first work point position computing section calculates a position of the work point at each of the plurality of positions. A calibration value computing section calculates calibration values of angle conversion parameters (αbm, βbm, αam, βam, αbk, βbk), dimension parameters (Lbm, Lam, Lbk), and line parameters (tilt tan θ, intercept Zline) using the fact that the positions of the work point at each of the plurality of positions calculated by the first work point position computing section can satisfy a linear equation indicating a datum line. A parameter update section reflects the calibration values calculated by the calibration value computing section in computation by a corresponding computing section that is one of the angle computing section and the first work point position computing section.
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公开(公告)号：US12031303B2
公开(公告)日：2024-07-09
申请号：US17414347
申请日：2019-11-21
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Shinji Ishihara , Shiho Izumi , Yasuhiko Kanari
Abstract: An installation error of a machine-body inertial measurement unit around a first axis is computed on a basis of sensing results of inertial measurement units of a front work implement, and the machine-body inertial measurement unit obtained while the upper swing structure is in a first calibration posture in which the upper swing structure faces a predetermined direction relative to a lower travel structure; and an installation error of the machine-body inertial measurement unit around a second axis is computed on a basis of a sensing result of the machine-body inertial measurement unit obtained while the upper swing structure is in a second calibration posture in which the upper swing structure is swung by 90 degrees relative to the lower travel structure from the first calibration posture, and the installation error of the machine-body inertial measurement unit around the first axis.
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公开(公告)号：US11891783B2
公开(公告)日：2024-02-06
申请号：US17274828
申请日：2020-01-29
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Kenta Nakagi , Yasuhiko Kanari , Shiho Izumi
CPC classification number: E02F9/264 , G02B27/0093 , G02B27/0101 , G02B27/017 , G02B27/0179 , G06T7/70 , G06T7/80 , G02B2027/014 , G02B2027/0138 , G02B2027/0187 , G06T2207/30204 , G06T2207/30252
Abstract: A calibration work support system includes an input device for inputting machine information including machine rank data on a hydraulic excavator and specification data on a front work implement, a display controller that generates a target posture image that is an image of the case in which the front work implement that takes target measurement posture is viewed with a point-of-view position and a line-of-sight direction of an operator M on the basis of the machine information input from the input device and target posture data defined in advance as the target measurement posture of the front work implement when an inertial measurement device is calibrated, and an HMD that displays the target posture image generated in the display controller. The HMD executes displaying in such a manner that the target posture image is superimposed on the actual front work implement viewed with the point-of-view position and the line-of-sight direction of the operator M.
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Patent Agency Ranking
公开(公告)号：US10323388B2
公开(公告)日：2019-06-18
申请号：US15549300
申请日：2016-03-10
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Yasuhiko Kanari , Manabu Edamura , Shiho Izumi , Takahiko Kurose
Abstract: A display system for a construction machine includes: a moving direction computing section for computing a predictive moving direction of a bucket; a work-tool display control section that, if the moving direction computing section predicts a movement of the bucket, changes the display position of a bucket image based on the predictive moving direction such that the area of a region located on the predictive moving direction side from the bucket image on the display screen of a monitor is displayed wider than when the bucket image is displayed at a reference position and that displays the bucket image at the reference position if a movement of the bucket cannot be predicted. A target-surface display control section displays on the display screen an image of a target surface when the bucket image is displayed at the display position determined by the work-tool display control section.
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7.发明授权公开(公告)号：US12146293B2
公开(公告)日：2024-11-19
申请号：US17275368
申请日：2020-03-25
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Shiho Izumi , Naoki Hayakawa , Kenta Nakagi , Yasuhiko Kanari
Abstract: In a hydraulic excavator including a controller configured to calculate the magnitude of a position difference in a height direction between a construction target surface and a front work implement on the basis of the position of the construction target surface, the position of a machine main body which is calculated by a GNSS receiver, and the posture of the front work implement which is detected by a posture sensor. The controller records snapshot data of information about an operation sensor, a pressure sensor, the posture sensor, the GNSS receiver, and a radio in a predetermined period that is determined based on a time at which the magnitude of the position difference exceeds a predetermined value when the magnitude of the position difference exceeds the predetermined value, and diagnoses a cause of the magnitude of the position difference exceeding the predetermined value, on the basis of the snapshot data.
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公开(公告)号：US12000114B2
公开(公告)日：2024-06-04
申请号：US17274448
申请日：2020-02-04
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Yasuhiko Kanari , Hideto Ishibashi
Abstract: A hydraulic excavator includes a receiver configured to calculate a position and an azimuth angle of an upper swing structure on the basis of satellite signals received by two GNSS antennae and a controller configured to calculate a distal end position of a bucket on the basis of the position and the azimuth angle of the upper swing structure calculated by the receiver. The controller sets, on the basis of installation positions of the two GNSS antennae, a movable range of a front work device and an inclination angle and an azimuth angle of the upper swing structure, a range within which the front work device possibly becomes an obstacle to reception of satellite signals by each of the two GNSS antennae as a mask range. The receiver is configured to calculate the position and the azimuth angle of the upper swing structure on the basis of the satellite signals transmitted from the remaining satellites other than the satellites positioned in the mask range.
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公开(公告)号：US10794046B2
公开(公告)日：2020-10-06
申请号：US15753246
申请日：2016-09-16
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Shinya Imura , Kouji Ishikawa , Hiroshi Sakamoto , Yasuhiko Kanari
Abstract: A hydraulic excavator (1) includes a controller (40) for generating, when the tip of a work implement (1A) is approaching a target surface (60) due to the pilot pressure output from an operating device (45a, 45b, 46a), a control signal for a boom cylinder (5) such that the tip of the work implement moves along the target surface and controlling the work implement (1A) by outputting the generated control signal to the flow control valve (15a) of the boom cylinder (5). The controller calculates the positional information of a finished shape (97) formed by the work implement, based on the topographic information input from a topographic measurement device (96) that measures the topography near the work machine and corrects the control signal based on the positional information of the finished shape such that the finished shape gets closer to the target surface.
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公开(公告)号：US10378186B2
公开(公告)日：2019-08-13
申请号：US15846292
申请日：2017-12-19
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Kohei Hiromatsu , Shiho Izumi , Yasuhiko Kanari , Daito Sakai
Abstract: When a work implement is actuated in such a manner that a work point is located at each of a plurality of positions on a datum line, a first work point position computing section calculates a position of the work point at each of the plurality of positions. A calibration value computing section calculates calibration values of angle conversion parameters (αbm, βbm, αam, βam, αbk, βbk), dimension parameters (Lbm, Lam, Lbk), and line parameters (tilt tan θ, intercept Zline) using the fact that the positions of the work point at each of the plurality of positions calculated by the first work point position computing section can satisfy a linear equation indicating a datum line. A parameter update section reflects the calibration values calculated by the calibration value computing section in computation by a corresponding computing section that is one of the angle computing section and the first work point position computing section.
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