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<p>Wide linear range and fast response of tactile sensors are crucial for simplifying signal conversion and enhancing real-time perception. However, traditional tactile sensors struggle to control force-electric response and viscoelastic hysteresis, limiting linear range and response speed. Inspired by the motion of the sea urchin tooth plate, this study proposes a tooth plate flexible tactile sensor (TPFTS), which integrates a bio-inspired elastomeric structure with conductive foam to achieve stress–strain tunability. The sensor achieves linear regulation of force-electric response, with a wide liner range (80-606 kPa with R<sup>2</sup> = 0.988), fast response and recovery time (29/24 ms), and excellent stability (over 20000 cycles). Additionally, TPFTS maintains stable signal output even with severe physical damage (signal stability &gt;95% with 8% volume loss). With superior performance, TPFTS has been applied in multi-degree-of-freedom force sensing, omnidirectional motion control, and wearable sensing, demonstrating its potential in health monitoring and human-machine interaction.</p>

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Sea urchin-inspired rigid-soft hybrid tactile sensor with wide linear range, fast response speed, and excellent robustness

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月18日

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  • Weihua Gao,
  • Jiantao Yao,
  • Xiangyu Fei,
  • Xianhe Yu,
  • Chaoming Li,
  • Congtian Gu,
  • Guoliang Ma,
  • Dakai Wang,
  • Zhiwu Han,
  • Luquan Ren

摘要

Wide linear range and fast response of tactile sensors are crucial for simplifying signal conversion and enhancing real-time perception. However, traditional tactile sensors struggle to control force-electric response and viscoelastic hysteresis, limiting linear range and response speed. Inspired by the motion of the sea urchin tooth plate, this study proposes a tooth plate flexible tactile sensor (TPFTS), which integrates a bio-inspired elastomeric structure with conductive foam to achieve stress–strain tunability. The sensor achieves linear regulation of force-electric response, with a wide liner range (80-606 kPa with R2 = 0.988), fast response and recovery time (29/24 ms), and excellent stability (over 20000 cycles). Additionally, TPFTS maintains stable signal output even with severe physical damage (signal stability >95% with 8% volume loss). With superior performance, TPFTS has been applied in multi-degree-of-freedom force sensing, omnidirectional motion control, and wearable sensing, demonstrating its potential in health monitoring and human-machine interaction.