Stretchable and High-Precision Optical Tactile Sensor for Trajectory Tracking of Parallel Mechanisms
Yiding Nie, Dongliang Fan, Jiatai Huang, Chunyu Liu, and Jian S. Dai

TL;DR
This paper introduces a stretchable optical tactile sensor with superhigh spatial and force resolution, capable of precise trajectory tracking in soft robotics and human-machine interfaces.
Contribution
A novel continuous spectral-filtering based stretchable tactile sensor achieving high resolution, insensitivity to off-axis stimuli, and integration into mechanisms for real-time trajectory tracking.
Findings
High linear spatial response (0.996) during stretching and bending
Spatial resolution of 7 μm and force resolution of 5 mN
Rotational trajectory tracking with 0.02° resolution
Abstract
Stretchable sensors indicate promising prospects for soft robotics, medical devices, and human-machine interactions due to the high compliance of soft materials. Discrete sensing strategies, including sensor arrays and distributed sensors, are broadly involved in tactile sensors across versatile applications. However, it remains a challenge to achieve high spatial resolution with self-decoupled capacity and insensitivity to other off-axis stimuli for stretchable tactile sensors. Herein, we develop a stretchable tactile sensor based on the proposed continuous spectral-filtering principle, allowing superhigh resolution for applied stimuli. This proposed sensor enables a high-linear spatial response (0.996) even during stretching and bending, and high continuous spatial (7 {\mu}m) and force (5 mN) resolutions with design scalability and interaction robustness to survive piercing and…
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Taxonomy
TopicsAdvanced Sensor and Energy Harvesting Materials · Soft Robotics and Applications · Tactile and Sensory Interactions
