PURPOSE: To efficiently carry out spraying work uniformly by arranging a transfer body and a plane along the both sides of a sprayed region and transferring the transfer body and the plane in parallel, maintaining the horizontal angle of a hose for spraying chemicals which is laid between the transfer body and the plane, at 0°.
CONSTITUTION: When chemicals are sprayed, a transfer body 11 such as small- sized tractor is allowed to stop on the point D on a footpath between rice fields. and a small-sized unmanned helicopter 1 is allowed to be in hovering on the point C on the footpath between rice fields through remote operation. Then, a hose 13 mounted on the transfer body 11 is operated and the transfer body 11 is advanced at a constant speed, and the chemicals are sprayed into a sprayed region 8 from a hose 14. At this time, the helicopter 1 is steered so that the horizontal angle θho which is formed by the standard line CL detected by a potentiometer 21 and the hose 14 is always at 0°. When the traveling accumulation distance of the transfer body 11 becomes equal to the length L of the sprayed region 8, the pump 13, transfer body 11, and the helicopter 1 are allowed to stop.
SUGIMOTO MAKOTO
SATO AKIRA
