Hitachi Construction Machinery Co., Ltd.

Kohei Hiromatsu

Shiho Izumi

Daito Sakai

Manabu Edamura

Yasuhiko Kanari

Naoki Hayakawa

A construction machine that can display various work devices including a bucket on a display device without causing a sense of discomfort is provided. A display controller is configured to deform a first drawing figure to create a first post-deformation drawing figure such that a triangle having vertexes at a first coupling point, a second coupling point and a first monitor point in the first drawing figure becomes congruent with a triangle having vertexes at the first coupling point, the second coupling point and the first monitor point in a coordinate system on an image on a display device, and arrange the first post-deformation drawing figure on a screen of the display device such that positions of the first coupling point, the second coupling point and the first monitor point in the first post-deformation drawing figure are arranged correspondingly to positions of the first coupling point, the second coupling point and the first monitor point, respectively, in the coordinate system on the image.

Construction machine

A measurement controller (): computes the position of a plane (S) representing a side surface of a work implement (A) in an image-capturing-device coordinate system (Co) on the basis of an image of the side surface of the work implement captured by an image-capturing device () and an internal parameter of the image-capturing device; computes the coordinate values of a point on the work implement in the image-capturing-device coordinate system (Co), the point corresponding to any pixel constituting the work implement on the captured image, on the basis of positional information on the pixel on the captured image and the position of the plane (S); and converts the coordinate values of the point on the work implement in the image-capturing-device coordinate system, the point corresponding to the pixel, to coordinate values in a work-implement coordinate system (Co) to output the coordinate values in the work-implement coordinate system (Co) to a work-machine controller () of a hydraulic excavator ().

Work-implement external-shape measurement system, work-implement external-shape display system, work-implement control system and work machine

A hydraulic excavator acquires operation content frequency data in a designated period based on output values output from a plurality of sensors sensing parameters that serve as indicators of operation contents performed via an operation device. A storage section stores a plurality of guide screens each corresponding to one of a plurality of work patterns of the hydraulic excavator. A work identifying section searches actual result data in the storage section for actual result data that matches or is similar to the operation content frequency data acquired by the data acquiring section in terms of operation contents and frequency thereof, and that identifies a current work pattern based on a work pattern allocated to actual result data related to a result of the search. A display device displays a guide screen corresponding to the work pattern identified by the work identifying section among the plurality of guide screens.

Work machine

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 (&#x3b1;bm, &#x3b2;bm, &#x3b1;am, &#x3b2;am, &#x3b1;bk, &#x3b2;bk), dimension parameters (Lbm, Lam, Lbk), and line parameters (tilt tan &#x3b8;, 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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Ushiku, Japan

Kohei Hiromatsu