| 摘要 |
<p>A setting/display processing unit (11) of a control unit (9) comprises means (11b, 11c, 11d) that use signals of angle detectors (8a, 8b) when a front device is in a preset positional relation with respect to a laser reference surface and a signal of a setter (7) to compute the positional relations among a car body, an external reference and a target excavation surface, and means (11e, 11f, 11g, 11h, 11j) that perform image processing using the positional relations and generate/output image signals for displaying the positional relations among the car body, the external reference and the target excavation surface; and a display device (12) displays on a display unit (20) the schematic diagram of the car body and the lines of the external reference and the target excavation surface using the above positional relations. Whereby, the target excavation surface can be easily set and a setting error with respect to the external reference is not likely to occur when a specified-depth surface is continuously excavated over a long distance using the external reference.</p> |
