# US 2013/0158797 A1 · Display system in hydraulic shovel and control method therefor

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- Number: US 2013/0158797 A1
- Document ID: US20130158797A1
- Status: Published application
- Kind: A1
- Application number: 13/819,471
- Filed: 2012-02-08
- Published: 2013-06-20
- Earliest claimed: 2011-02-22
- Assignees: Komatsu Ltd.
- Inventors: Ryo Fukano; Azumi Nomura; Takashi Kurihara; Etsuo Fujita; Masao Ando; Toshihiro Koide
- Web page: https://patentgrep.com/patent/US20130158797A1

## CPC

- E02F 9/2025: {Particular purposes of control systems not otherwise provided for (E02F3/16, E02F3/26, sub-groups of E02F3/43, E02F3/651, sub-groups of E02F3/84, E02F3/907, E02F5/145 take precedence)}
- E02F 9/264: {Sensors and their calibration for indicating the position of the work tool}
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)

## Abstract

A calculation unit of a hydraulic shovel display system sets a predetermined display range displayed as a guidance picture for land shape data. The guidance picture shows a cross section of a target surface included in a display range as seen from a side of a main vehicle body, and a current position of the hydraulic shovel. The calculation unit calculates a position of a start point nearest the main vehicle body and a position of an end point set apart from the start point by a maximum reach length of the work machine in the cross section of the target surface as seen from the side based on land shape data, work machine data and a current position of the main vehicle body. The calculation unit calculates a predetermined reference point of the display range based on the positions of the start point and the end point.

## Claims

### Claim 1

A display system for displaying a guidance picture showing a current position of a hydraulic shovel having a main vehicle body and a work machine attached to the main vehicle body, and a target surface selected from a plurality of design surfaces constituting a design land shape, the display system comprising:
a land shape data storage unit configured and arranged to store land shape data indicating a position of the target surface;
a work machine data storage unit configured and arranged to store work machine data indicating a maximum reach length of the work machine;
a position detector unit configured and arranged to detect the current position of the main vehicle body;
a calculation unit configured to set a predetermined display range displayed as the guidance picture for the land shape data, to calculate a position of a start point nearest the main vehicle body and a position of an end point set apart from the start point by the maximum reach length of the work machine on a cross section of the target surface as seen from a side of the main vehicle body based on the land shape data, the work machine data, and the current position of the main vehicle body, and to calculate a position of a predetermined reference point in the display range based on the positions of the start point and the end point; and
a display unit configured an arranged to display the guidance picture showing the cross section of the target surface included in the display range as seen from the side, and the current position of the hydraulic shovel.

### Claim 2 (depends on 1)

The display system for the hydraulic shovel according to claim 1, wherein
the end point is positioned outside the target surface when the cross section of the target surface is smaller than the maximum reach length.

### Claim 3 (depends on 1)

The display system for the hydraulic shovel according to claim 1, wherein
the display range has a rectangular shape, and
the calculation unit is configured to determine whether a short side of the display range is a vertical side or a horizontal side based on a screen aspect ratio of a part of the display unit displaying the guidance picture, and to determine a reduced scale of the display range so that a predetermined range of the guidance picture falls within a range of the short side of the display range.

### Claim 4 (depends on 1)

A hydraulic shovel comprising the display system for the hydraulic shovel according to claim 1.

### Claim 5

A method of controlling a display system for displaying a guidance picture showing a current position of a hydraulic shovel having a main vehicle body and a work machine attached to the main vehicle body, and a target surface selected from a plurality of design surfaces constituting a design land shape, the method comprising:
detecting a current position of the main vehicle body;
setting a predetermined display range displayed as the guidance picture for land shape data indicating a position of the target surface;
calculating a position of a start point nearest the main vehicle body and a position of an end point set apart from the start point by a maximum reach length of the work vehicle on a cross section of the target surface as seen from a side of the main vehicle body based on the land shape data, work machine data indicating the maximum reach length of the work machine, and the current position of the main vehicle body;
calculating a position of a predetermined reference point in the display range based on the positions of the start point and the end point; and
displaying the guidance picture showing the cross section of the target surface included in the display range as seen from the side, and the current position of the hydraulic shovel.