| 摘要 |
PCT No. PCT/NO98/00018 Sec. 371 Date Oct. 6, 1999 Sec. 102(e) Date Oct. 6, 1999 PCT Filed Jan. 21, 1998 PCT Pub. No. WO98/31209 PCT Pub. Date Jul. 23, 1998When planting plants and similar objects a forest vehicle (1) is used which is provided with automatic planting assemblies (13) mounted at hydraulically controlled arms (11). The vehicle (1) moves slowly forwards and the absolute geographic position thereof is determined by means of satellite signals received on the antenna (15). At the frontmost portion of the vehicle (1), on a movable arm (3) scanning device such as a georadar screen (5) is provided, which transmits radar waves having a suitable wavelength and scans the ground area in front of the vehicle (1). The georadar determines the depth of soil and obstacles to planting such as stones and stumps. From the determinations of the georadar also suitable planting places are determined and the positions thereof are stored. The planting arms (11) and their assemblies (13) are then controlled, so that during the continuous movement of the vehicle forwards the planting assemblies stand still at the determined planting places and there perform planting. Owing to the determination of the soil conditions planting can be made with a high yield and due to the automatised procedure using a minimum of man power. |
