受動的で柔軟な音響導波路によるスケーラブルな動的触覚センシング
Scalable Dynamic Tactile Sensing Enabled by Passive and Flexible Acoustic Waveguides
深いサブ波長の音響導波路を用いた受動的分布型触覚センシング手法を提案し、柔軟性を保ちながら高精度な位置検出と波形再構成を実現した。
詳しい要約
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著者: Guimin Long, Changhong Linghu, Chuanping Liu, Ke Xu, Xingjian Jing
分類: cs.RO
原文アブストラクト
Artificial dynamic tactile sensing requires sensitivity, robustness, and compliance, yet existing technologies face trade-offs when scaling to large-area arrays, compounded by wiring complexity and cost. Here, we report a passive distributed paradigm using deep sub-wavelength acoustic waveguides that decouples performance from structural flexibility. Elastic-membrane-capped Helmholtz resonators interconnected by spring-reinforced microtubes form an enclosed network with invariant acoustic transmission under macroscopic bending. By sparsely embedding microphones, the system achieves real-time localization (4 mm highest spatial resolution; >99% accuracy in a 4 microphones 64-node sensing array) and waveform reconstruction of low-frequency signals (<100 Hz). Fast Continuous Wavelet Transform and a lightweight neural network enable inference within 5.5 ms. We demonstrate conformable prototypes-fingertip arrays, a tactile glove, and large-area skins-detecting stimuli from single-hair contact to 5-mg particle impacts, arterial pulse waves, feather touches, and finger contact. This establishes a scalable, flexible, low-cost paradigm for next-generation human-machine interfaces.
