Calibration of discrete element parameters for spinach seeds and optimization of seed-metering device design
Jiaxing Qing, Xusheng Gong, Xuan Cai, Weijie Tan, Hanzhou Hao, Xinyi Liang, Zi’ang Gao, Chao He
TL;DR
This study improves spinach seed planting by creating a simulation model and optimizing a seed-metering device to accurately place two seeds per hole.
Contribution
A novel method for calibrating discrete element parameters and optimizing seed-metering device design for spinach seeds is proposed.
Findings
Calibrated contact parameters for spinach seeds and PVC plate interactions were determined using simulation and physical tests.
Optimized seed-metering hole dimensions achieved a 92.23% qualified seeding rate at 10 r/min.
The device design meets agronomic requirements for precise spinach seed planting.
Abstract
Due to the lack of an exact simulation model for spinach seeds, existing seed-metering devices exhibit poor seeding performance and struggle to achieve precise seeding of two seeds per seed-metering hole. This study proposes a method for calibrating discrete element parameters of spinach seeds and develops a seed-metering device with rectangular seed-metering holes tailored to the two-seeds-per-hole requirement. Firstly, a spinach seed discrete element model was constructed. Based on the Box-Behnken Design experimental scheme, simulations of angle of repose and fluidity, combined with physical of angle of repose (38.27°) and physical mass flow rate (18.60 g/s), were used to calibrate contact parameters: (1) between spinach seed models (coefficient of restitution: 0.385; coefficient of static friction: 0.481; coefficient of rolling friction: 0.042); and (2) between seed models and PVC…
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Taxonomy
TopicsSoil Mechanics and Vehicle Dynamics · Agricultural Engineering and Mechanization · Tree Root and Stability Studies