Learning tactile perception from high-bandwidth single-point sensing
作者: Joseph Rigal, Emmanuel Virot, Caroline Pascal
分类: cs.RO, cs.LG
发布日期: 2026-09-21
💡 一句话要点
提出SpectRobot框架以解决单点触觉感知问题
🎯 匹配领域: 支柱一:机器人控制 (Robot Control)
关键词: 触觉感知 机器人操作 时频谱图 高带宽传感 学习系统 动态环境 单点传感器
📋 核心要点
- 现有触觉感知方法多依赖空间分布的传感器,导致在动态环境中易受损,且难以实现高带宽感知。
- SpectRobot框架通过将单点触觉信号转化为时频谱图,利用稀疏高带宽测量的丰富动态信息,提升了触觉感知的有效性。
- 实验结果表明,机器人能够利用单点信号完成复杂任务,且不同触觉传感技术间可共享相同的表示形式。
📝 摘要(中文)
触觉感知正越来越多地被应用于基于学习的机器人操作中,但许多现有方法依赖于空间分布的传感器。本文提出了SpectRobot框架,将单点触觉信号转化为紧凑的时频谱图。这些谱图以固定大小的图像形式编码高带宽触觉历史,能够被标准视觉编码器处理,并集成到原本为视觉开发的学习管道中,同时保留了传统相机无法获取的时间和频率信息。我们的实验表明,机器人可以利用单点振动信号解决视觉遮挡的操作任务,且时间历史对策略性能影响显著,传感带宽控制可用的谱信息,测量频率可达100 kHz。
🔬 方法详解
问题定义:本文旨在解决现有触觉感知方法在动态环境中对高带宽信息的获取不足,尤其是依赖空间分布传感器的局限性。
核心思路:SpectRobot框架通过将单点触觉信号转化为时频谱图,充分利用稀疏测量中的动态信息,而不是增加传感器的空间密度。
技术框架:该框架包括信号采集、时频谱图生成、视觉编码器处理和学习管道集成等主要模块,形成一个完整的触觉感知系统。
关键创新:SpectRobot的核心创新在于将高带宽单点触觉信号转化为图像形式的时频谱图,使其能够与视觉学习系统无缝集成,突破了传统触觉感知的局限。
关键设计:在实现中,传感器远离接触表面安装,保持机械耦合,减少磨损影响,提升在恶劣环境中的鲁棒性。
🖼️ 关键图片
📊 实验亮点
实验结果显示,机器人能够利用单点振动信号成功完成视觉遮挡的操作任务,且时间历史对策略性能的影响显著,传感带宽可达100 kHz,展示了与传统方法的显著提升。
🎯 应用场景
该研究的潜在应用领域包括机器人抓取、操作和人机交互等场景,能够提升机器人在复杂环境中的操作能力。通过更广泛地接入高带宽触觉感知,未来可能推动接触动态在具身学习系统中的整合,提供新的解决方案。
📄 摘要(原文)
Tactile sensing is increasingly being incorporated into learning-based robotic manipulation, yet many existing approaches rely on spatially distributed sensors. Here we introduce SpectRobot, a framework that transforms single-point tactile signals into compact time-frequency spectrograms. These spectrograms encode high-bandwidth tactile histories as fixed-size image-like representations. They can be processed by standard vision encoders and integrated into learning pipelines originally developed for vision, while preserving temporal and frequency information unavailable to conventional cameras. Rather than increasing spatial density through arrays of tactile elements, SpectRobot exploits the rich dynamics contained in sparse, high-bandwidth single-point measurements. In our implementation, the sensors are mounted away from the contact surface while remaining mechanically coupled to it, reducing direct exposure to wear and potentially improving robustness in harsh environments and for long-term deployment on dexterous robots. Our experiments demonstrate that: (1) a robot can exploit single-point vibration signals to solve a visually occluded manipulation task; (2) temporal history strongly influences policy performance, while sensing bandwidth controls the spectral information available, with measurements extending to 100~kHz; and (3) the same representation can be used across different tactile sensing technologies mediated by acceleration, force, or strain. We further show that capabilities previously associated with research-grade instrumentation can be accessed using readily available, off-the-shelf hardware. We believe that broader access to high-bandwidth tactile sensing could facilitate the integration of contact dynamics into embodied learning systems and, for some tasks, offer an alternative or complement to increasing the spatial density of tactile sensing.