| 摘要 |
PURPOSE:To enable a surface to be finished into a desired shape with high precision, by a method wherein a detector for height deviation between a bucket and a profiling surface is mounted to a bucket, and a control valve for boom is controlled in a direction, in which deviation is brought into zero, through inputting of a deviation signal to a computing control device. CONSTITUTION:A detector 5 is mounted to a bucket 4 of a hydraulic shovel to detect height deviation between an excavation profiling surface 6 and a point 7 of the claw of the bucket. A detecting signal is inputted to a computing controller 9 to output a signal to a boom flow rate control valve 10 so that a deviation signal is brought to zero, and a boom cylinder 11 is actuated. Further, a manual.automatic change-over switch 8 is located between the comuting controller 9 and the boom flow rate control valve 10. This, when deviation is brougt to zero, enables to perform automatic excavation in confromity with a desired curve and plane. |
