A Bio-Inspired Whisker Sensor toward Underwater Flow Sensing in Darkness and Turbidity
Zheyi Hang, Denghan Xiong, Pengo Xie, Huan Hu

TL;DR
This paper introduces a bio-inspired whisker sensor for underwater flow detection, mimicking seal whiskers to achieve high sensitivity, stability, and directional discrimination in turbid waters, suitable for UUV navigation.
Contribution
The work presents a novel flexible whisker sensor embedding silicon strain gauges, offering high sensitivity, robustness, and simplified packaging for underwater flow sensing in challenging environments.
Findings
Limit of detection of 0.27 mN
Maintains stability after 10,000 cycles
Minimal offset drift of less than 2%
Abstract
Underwater flow sensing is critical for unmanned underwater vehicles (UUVs) and environmental monitoring, yet existing sensors often suffer from low responsiveness, high detection thresholds, limited directional discrimination, complex packaging, and poor long-term stability, especially for navigation and target perception in turbid and cluttered waters. Previous solutions based on traditional strain gauges with limited detection accuracy or doped silicon sensors with limited detection height have shown feasibility but still face challenges in scalability, robustness under harsh aquatic conditions, and calibration complexity. This work presents a bio-inspired whisker sensor that provides a balanced solution by embedding high-gauge-factor silicon strain gauges into a flexible PDMS base, mimicking seal whiskers to offer both high sensitivity and simplified packaging. The device exhibits a…
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Taxonomy
TopicsUnderwater Vehicles and Communication Systems · Advanced Sensor and Energy Harvesting Materials · Marine animal studies overview
