Measurement Method of Collision Restitution Coefficient between Corn Seed and Soil Based on the Collision Dynamics Theory of Mass Point and Fixed Surface

The collision restitution coefficient (CRC) is the essential parameter of discrete element method (DEM) to study interaction mechanism between corn seed and soil. accuracy its measurement results criticalness ensuring simulation accuracy. In current study, CRC soil mainly measured by colliding with However, since a granular body, essence one quantity particles, resulting in inaccurate particles. Therefore, based on dynamics theory mass point fixed surface, this paper proposed This analyzed influence selection process. was determined taking particle as surface. To verify feasibility method, system established high-speed camera technology. dropped at heights 10, 15, 20, 25 cm collide seed. separation velocity approaching obtain Taking simulation, experiment (DESE) bin (SBE)of free fall impact were carried out, compared analyzed. experiment, falling height (40, 50, 60, 70 cm) touching position (positions a, b, c, d) taken influencing factors. movement state ratio (SAVR) ξ during indexes. showed that when positions touched same, increase height, SAVR obtained from DESE SBE downward trend. When d, motion basically same SBE. relative error less than 10%, which proves paper. provided theoretical research basis for clarifying solving bouncing precision sowing.