GelSight FlexiRay: Breaking Planar Limits by Harnessing Large Deformations for Flexible,Full-Coverage Multimodal Sensing
作者: Yanzhe Wang, Hao Wu, Haotian Guo, Huixu Dong
分类: cs.RO
发布日期: 2024-11-28
备注: 14 pages, 8 figures
💡 一句话要点
提出GelSight FlexiRay以解决柔性机器人触觉传感的局限性问题
🎯 匹配领域: 支柱九:具身大模型 (Embodied Foundation Models)
关键词: 柔性机器人 触觉传感 多模态感知 视觉-触觉传感器 结构变形 人机交互 抓取任务
📋 核心要点
- 现有的视觉-触觉传感器依赖刚性结构,限制了柔性抓手的感知能力和适应性。
- 本文提出GelSight FlexiRay,通过多镜面配置和人类般的多模态感知,解决了柔性抓手中的触觉感知问题。
- 实验表明,GelSight FlexiRay在不同变形状态下的触觉性能优越,力测量和位置精度显著提升。
📝 摘要(中文)
将触觉传感集成到柔性软体机器人抓手中,为先进的机器人抓取和更安全的人机交互提供了有效途径。现有的视觉-触觉传感器依赖于刚性结构,牺牲了手指的柔性和感知区域。为了解决这一问题,本文提出了GelSight FlexiRay,这是一种多模态视觉-触觉传感器,能够在大幅结构变形的情况下实现安全和灵活的交互。通过采用多镜面配置并增强人类般的多模态感知,实验结果表明GelSight FlexiRay在不同变形状态下表现出色,力测量精度达到0.14 N,位置精度达到0.19 mm。与现有的柔性视觉-触觉传感器相比,FlexiRay在相同负载下的结构变形能力提升了五倍,展示了其在软体机器人系统中广泛应用的潜力。
🔬 方法详解
问题定义:本文旨在解决现有视觉-触觉传感器在柔性机器人抓手中因刚性结构导致的触觉感知局限性,尤其是在大幅变形情况下的感知能力不足。
核心思路:GelSight FlexiRay通过采用多镜面配置,优化光学路径,增强了在柔性结构变形下的触觉感知能力,同时集成了多种感知模式,如接触力、位置、温度、纹理和滑动检测。
技术框架:整体架构包括多镜面配置的设计、物理力-变形特性建模、以及多模态感知的集成。主要模块包括光学系统、传感器数据处理和感知信息融合。
关键创新:GelSight FlexiRay的核心创新在于其能够在大幅度结构变形下实现高精度的触觉感知,且其变形能力是现有柔性视觉-触觉传感器的五倍,显著提高了感知区域和信息区分能力。
关键设计:在设计中,采用了优化的多镜面配置以确保光学路径的畅通,设置了适当的参数以提高力测量和位置感知的精度,同时设计了适合的损失函数以优化多模态感知的融合效果。
🖼️ 关键图片
📊 实验亮点
实验结果显示,GelSight FlexiRay在不同变形状态下的力测量精度达到0.14 N,位置精度达到0.19 mm。与现有的柔性视觉-触觉传感器相比,其在相同负载下的结构变形能力提升了五倍,展示了其在多模态触觉感知中的卓越性能。
🎯 应用场景
该研究的潜在应用领域包括柔性机器人抓取、医疗机器人、以及人机协作系统等。通过实现高分辨率的触觉感知,GelSight FlexiRay能够提升机器人在复杂环境中的操作能力,促进更安全的人机交互,具有广泛的实际价值和未来影响。
📄 摘要(原文)
The integration of tactile sensing into compliant soft robotic grippers offers a compelling pathway toward advanced robotic grasping and safer human-robot interactions. Visual-tactile sensors realize high-resolution, large-area tactile perception with affordable cameras. However, conventional visual-tactile sensors rely heavily on rigid forms, sacrificing finger compliance and sensing regions to achieve localized tactile feedback. Enabling seamless, large-area tactile sensing in soft grippers remains challenging, as deformations inherent to soft structures can obstruct the optical path and restrict the camera's field of view. To address these, we present Gelsight FlexiRay, a multimodal visual-tactile sensor designed for safe and compliant interactions with substantial structural deformation through integration with Finray Effect grippers. First, we adopt a multi-mirror configuration, which is systematically modeled and optimized based on the physical force-deformation characteristics of FRE grippers. Second, we enhanced Gelsight FlexiRay with human-like multimodal perception, including contact force and location, proprioception, temperature, texture, and slippage. Experiments demonstrate Gelsight FlexiRay's robust tactile performance across diverse deformation states, achieving a force measurement accuracy of 0.14 N and proprioceptive positioning accuracy of 0.19 mm. Compared with state of art compliant VTS, the FlexiRay demonstrates 5 times larger structural deformation under the same loads. Its expanded sensing area and ability to distinguish contact information and execute grasping and classification tasks highlights its potential for versatile, large-area multimodal tactile sensing integration within soft robotic systems. This work establishes a foundation for flexible, high-resolution tactile sensing in compliant robotic applications.