Analysis on dropping processing of precision sowing device in rice seeding bowl by high-speed photography

In order to uncover the dropping processing of precision sowing device in rice seeding bowl, the process of dropping and motion manner of rice by the assembled of rice bowl dish precision sowing device was photographed on line by the high-speed photography. By observing and analyzing the reproduction of the photographed pictures, there exist different types of rice movement such as rotation, deflection etc. The trajectory is the quadratic curve, the vertical velocity increases with time but not increase by linear, by fitting the model in line with Yield Density, rice seed horizontal displacement are related to vertical displacement. Considering the rate and efficiency of dropping, 31 mm is determined as the maximum of the vertical displacement. The results provide the theoretic foundation for the dropping rate of precision sowing device in rice seeding bowl.