双臂采摘机器人提升果园作业效率,实测成功率80%、损伤率低于5%。
A Modular Dual-Arm Apple Harvesting Robot with Enhanced Field Performance

- 上下叠装双臂设计,单树定位即可同步采摘上下枝果。
- 实测每循环7.53秒,单次采摘成功率80%,果实完好率达91.2%。
- 适配商业果园,可应对不同品种与树形,适合农业自动化团队参考。
机器人采摘为缓解果园用工荒提供可行方案,但作业效率低和田间表现差制约其商业化应用。本文提出一种模块化双臂苹果采摘机器人,采用垂直堆叠臂结构,实现单棵树上、下区域同步作业,将平台定位从多树横向移动简化为单树停靠。相比此前水平双臂系统,该平台集成五项改进:(1) 基于基础模型的感知流水线,融合Grounding-DINO与EfficientViT-SAM,实现非结构化户外环境下的鲁棒果实定位;(2) 七阶急动量约束轨迹生成结合控制屏障函数安全过滤器,实现快速且安全的臂部运动;(3) 线性扫掠采摘策略,配合10cm接近缓冲与旋转分离方式,提升采摘可靠性;(4) 基于时序逻辑的双臂协调策略,结合视觉-机械臂异步调度,最大化共享真空源利用率;(5) 在两个商业化果园中完成2025年采收季验证,覆盖不同苹果品种与树形结构。在共采集的1738次臂操作中,系统达到80.0%的单次成功率,平均单臂周期时间7.53秒。果实损伤评估显示,91.2%的机器人采摘果实保持最高美国农业部等级(Extra Fancy),淤伤率介于2.4%至4.9%之间。进一步优化采摘周期与重叶遮挡处理后,该模块化设计有望实现苹果商业化采摘。
原文摘要 · Abstract (English)
Robotic apple harvesting offers a promising solution to labor shortages in commercial orchards, but low throughput and poor performance in orchard environments hinder its commercial adoption. This paper presents a modular dual-arm apple harvesting robot that uses a vertically stacked arms to enable simultaneous operation in the upper and lower zones of a single tree, simplifying platform positioning from multi-tree lateral repositioning to single-tree stops. Compared to our prior horizontal dual-arm system, the platform integrates 5 advances: (1)a foundation-model-based perception pipeline combining Grounding-DINO and EfficientViT-SAM for robust fruit localization in unstructured outdoor environments; (2)7th-order jerk-bounded trajectory generation paired with a Control Barrier Function safety filter to achieve fast yet safe arm motions; (3)a linear sweep harvesting strategy with a 10cm approach buffer and rotational detachment that improves picking reliability; (4)a temporal-logic-based dual-arm coordination policy with vision-arm async scheduling that maximizes usage of a shared vacuum source; and (5)field validation in 2 commercial orchards covering different apple varieties and tree architectures during the 2025 harvest season. Across the 1738 arm cycles collected in these field trials, the system achieved an 80.0% per-attempt success rate and a mean per-arm cycle time of 7.53s. Fruit damage assessments confirmed that 91.2% of robotically harvested fruit retained the highest USDA grade (Extra Fancy), with bruise rates between 2.4% and 4.9%. With further improvements in the picking cycle time and handling of heavy foliage occlusions, this new modular robot design holds promise for commercial harvesting of apples.
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