Authors

Abstract

To solve the problems of multiple picking and missed picking in garlic planting, single-seed picking has become a critical technology requiring urgent improvement. In response, a claw-chain mechanism for single garlic seed picking was developed. Based on theoretical analysis of the seed picking claw’s motion, the feasible ranges of claw speed (v), minimum seed-holding length (S₂), and sprocket inclination angle (θ) were determined. Using the EDEM simulation platform, the single-seed picking rate and missed picking rate under different parameter combinations were obtained. A Box–Behnken central composite design was used to conduct a three-factor, three-level quadratic regression experiment involving claw speed, minimum seed-holding length, and sprocket inclination angle. Design-Expert software was employed to establish a response surface model and optimize the key parameters affecting the single-seed picking rate. The optimal parameter combination was a claw speed of 0.05 m/s, a minimum seed-holding length of 32.4 mm, and a sprocket inclination angle of 5.6°. Under these conditions, the single-seed picking rate reached 90.25%, and the missed picking rate was 4.9%, meeting the technical requirements for garlic single-seed planting.

Abstract in Chinese

为解决大蒜种植过程中存在多取漏取问题，单粒取种成为了亟需解决的关键技术。针对此问题，设计了一种爪链式单粒取种装置。通过对取种爪运动状态进行理论分析，确定取种爪速度（v）、取种爪最小容种长度（S2）及两链轮倾角（θ）的取值范围。利用EDEM仿真平台得到单粒取种率、漏取率的相应指标值。运用Box-Benhnken中心组合试验方法对取种爪速度、取种爪最小容种长度、两链轮倾角进行三因素三水平二次回归试验设计，采用Design-expert软件建立响应面数学模型，对影响单粒取种率的关键参数进行了综合优化，得到最优工作参数组合为取种爪速度为0.05m/s，取种爪最小容种长度为32.4mm，两链轮倾角为5.6°，在此条件下进行试验得到单粒取种率为90.25%，漏取为4.9%，满足大蒜种植的单粒取种率要求。