皮肤灵活的超线性离子压力传感器用于可穿戴的肌肉骨监测
Pei Li1,2, Shipan Lang1, Lei Xie3
1Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China.
Nano-micro letters
|September 1, 2025
概括
一种新型的柔性离子压力传感器 (FIPS) 模仿人体皮肤以准确测量动态负荷,有助于早期检测运动引起的骨压力骨折.
科学领域:
- 仿生工程
- 可穿戴传感器技术
- 肌肉骨生物力学
背景情况:
- 运动引起的骨压力骨折正在增加,需要精确监测动态肌肉骨负荷.
- 现有的灵活压力传感器难以平衡高灵敏度与全范围线性,限制了它们的临床应用.
- 人体皮肤的多层结构和离子通道信号提供了先进的触觉模型.
研究的目的:
- 开发一种灵活的离子压力传感器 (FIPS),用于监测肌肉骨负荷.
- 克服常规压力传感器中的灵敏度-线性性权衡.
- 通过人类皮肤的触觉机制创建仿生传感器.
主要方法:
- 设计了一种双机制的FIPS,它结合了数字化织物微结构和离子膜.
- 工程压力比例接触面积扩张 ( P1/3) 和自我适应的离子度调制 ( P2/3).
- 在各种基板和离子材料中验证FIPS性能,并将其集成到智能内中进行步态分析.
主要成果:
- 在0-1MPa范围内实现了前所未有的灵敏度 (242kPa-1) 和线性 (R2=0.997),具有创纪录的线性传感因子 (LSF=242,000).
- 通过各种材料和基板的验证证明了多功能性.
- 使用FIPS的智能内在步态分析中显示1.8%的错误,显著超过非线性传感器 (6.5%的错误).
结论:
- 生物模拟FIPS设计克服了传统传感器的局限性,提供了高灵敏度和线性.
- 开发的传感器可以准确地评估骨负荷,从而预测压力骨折的风险.
- 这项工作为具有医疗级精度的高性能线性可穿戴传感器建立了通用框架.
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