一款能抓取大小和状态各异物体的通用软体夹爪,无需密封也能操作液固物。
Everything-Grasping (EG) Gripper: A Universal Gripper with Synergistic Suction-Grasping Capabilities for Cross-Scale and Cross-State Manipulation
- 融合表面吸力与颗粒锁紧,实现无密封接触的跨尺度抓握。
- 可处理0.2至62,000 mm²的物体,跨度达3500倍以上。
- 自适应识别固液状态,支持水下、脆弱物等复杂任务。
在软体机器人领域,用单一机械手抓取尺寸差异大且物理状态各异(包括固体和液体)的物体仍是一大挑战。本文提出一种名为Everything-Grasping(EG)的软体末端执行器,通过集成分布式表面吸力与内部颗粒锁紧机制,实现无需在接触界面形成气密密封的跨尺度、跨状态操作。该夹爪可处理表面积从0.2 mm²(玻璃微珠)到超过62,000 mm²(A4纸张与编织袋)的物体,其操作范围覆盖约3500倍于自身接触面积(约707 mm²,直径30 mm)的小物与88倍大的物。我们还设计了一种触觉感知框架,结合液态检测与压力反馈式吸力控制,实现实时区分固态与液态目标。基于触觉推断的抓取模式选择(TIGMS)算法,根据分布压力与电压信号自主切换抓取方式。实验涵盖水下抓取、易碎品操作及液体捕获等多样任务,均表现出稳健可靠的重复性能。据我们所知,这是首个利用统一柔性结构稳定抓取固液跨尺度物体的软体夹爪。
原文摘要 · Abstract (English)
Grasping objects across vastly different sizes and physical states-including both solids and liquids-with a single robotic gripper remains a fundamental challenge in soft robotics. We present the Everything-Grasping (EG) Gripper, a soft end-effector that synergistically integrates distributed surface suction with internal granular jamming, enabling cross-scale and cross-state manipulation without requiring airtight sealing at the contact interface with target objects. The EG Gripper can handle objects with surface areas ranging from sub-millimeter scale 0.2 mm2 (glass bead) to over 62,000 mm2 (A4 sized paper and woven bag), enabling manipulation of objects nearly 3,500X smaller and 88X larger than its own contact area (approximated at 707 mm2 for a 30 mm-diameter base). We further introduce a tactile sensing framework that combines liquid detection and pressure-based suction feedback, enabling real-time differentiation between solid and liquid targets. Guided by the actile-Inferred Grasping Mode Selection (TIGMS) algorithm, the gripper autonomously selects grasping modes based on distributed pressure and voltage signals. Experiments across diverse tasks-including underwater grasping, fragile object handling, and liquid capture-demonstrate robust and repeatable performance. To our knowledge, this is the first soft gripper to reliably grasp both solid and liquid objects across scales using a unified compliant architecture.
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