一种基于聚二甲基硅氧烷（PDMS）涂层的气球形光纤呼吸监测传感器。

A PDMS Coating-Based Balloon-Shaped Fiber Optic Respiratory Monitoring Sensor.

作者信息

Shi Qingfeng, Cui Yunkun, Zhang Yu, Zhang Jie, Peng Feng

机构信息

Sports Department, Taishan University, Taian 271000, China.

School of Physics and Technology, University of Jinan, Jinan 250022, China.

出版信息

Sensors (Basel). 2025 Aug 20;25(16):5174. doi: 10.3390/s25165174.

DOI:10.3390/s25165174

PMID:40872035

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12389851/

Abstract

A respiratory monitoring sensor based on a balloon-shaped optical fiber is proposed. The sensor consists of a single-mode fiber (SMF) coated with polydimethylsiloxane (PDMS) bent into a balloon shape to form a fiber optic Mach-Zehnder interferometer. The sensor's sensitivity to temperature enables monitoring of breathing status by recognizing the temperature changes that occur during human respiration. By adjusting the bending radius of the balloon-shaped SMF, high-order modes can be effectively excited to interfere with the core mode. Due to the high thermo-optic coefficient and thermal expansion coefficient of PDMS itself, the balloon-shaped fiber optic sensor can achieve temperature sensitivity. The experimental results show that the temperature sensitivity is -166.29 pm/°C in a temperature range of 30 °C to 60 °C. Finally, the proposed sensor was mounted into a respiratory mask to monitor different breathing states (normal, fast, slow, and oral-nasal breathing transitions) and breathing frequencies.

摘要

提出了一种基于气球状光纤的呼吸监测传感器。该传感器由一根涂覆有聚二甲基硅氧烷（PDMS）的单模光纤（SMF）组成，该光纤弯曲成气球形状以形成光纤马赫-曾德尔干涉仪。传感器对温度的敏感性使得能够通过识别人类呼吸过程中发生的温度变化来监测呼吸状态。通过调整气球状SMF的弯曲半径，可以有效地激发高阶模与芯模发生干涉。由于PDMS本身具有较高的热光系数和热膨胀系数，气球状光纤传感器能够实现温度敏感性。实验结果表明，在30℃至60℃的温度范围内，温度灵敏度为-166.29 pm/℃。最后，将所提出的传感器安装到呼吸面罩中，以监测不同的呼吸状态（正常、快速、缓慢以及口鼻呼吸转换）和呼吸频率。