To uniform the spray density of a chemical and to raise the accuracy of the detected speed of a self-propelled chemical spraying vehicle by equipping the vehicle with a rotator for detecting a vehicle speed, a rotative speed detector and a spray flow rate controlling means, spraying the chemical from a nozzle to a paddy field and changing the spray flow rate in relation to the vehicle speed.
This self-propelled chemical spraying vehicle runs on a traveling ground and a rotator for detecting a vehicle speed rolls on the surface layer of the traveling ground to make the slip ratio of the rotator lower than that of wheels. The rotative speed of the rotator is detected by a rotative speed detector 82 and the vehicle speed is calculated based on the detected value of the detector 82. A spray flow rate controlling means 76 changes a spray flow rate based on the vehicle speed calculated from the rotative speed of the rotator to uniform the spray density regardless of the vehicle speed. A spray flow rate controlling means 76 changes the spray pressure of a nozzle 30 for jetting a chemical 54 to control the spray flow rate.
| JPH11103753 | APPARATUS FOR DILUTING WETTABLE POWDER |
| WO/2022/077177 | UNMANNED AERIAL VEHICLE |
KOBAYASHI KENJI
MATSUZAKI KAZUTADA
