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应用科学学报 ›› 2024, Vol. 42 ›› Issue (2): 237-247.doi: 10.3969/j.issn.0255-8297.2024.02.005

• 通信工程 • 上一篇    下一篇

基于光纤光栅的多点拉锥光纤柔性曲率传感器

吴锴, 龚华平, 倪凯, 毛邦宁, 赵春柳   

  1. 中国计量大学 光学与电子科技学院, 浙江 杭州
  • 收稿日期:2022-07-30 出版日期:2024-03-31 发布日期:2024-03-28
  • 通信作者: 赵春柳,教授,研究方向为光纤传感。E-mail:clzhao@cjlu.edu.cn E-mail:clzhao@cjlu.edu.cn
  • 基金资助:
    国家重点研发计划（No.2020YFF0217800）资助

Multi-point Tapered Fiber Flexible Curvaturer Sensor Based on Fiber Grating

WU Kai, GONG Huaping, NI Kai, MAO Bangning, ZHAO Chunliu   

  1. College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, Zhejiang, China
  • Received:2022-07-30 Online:2024-03-31 Published:2024-03-28

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摘要： 针对现有曲率传感器存在制造工艺繁琐、成本较高的问题，提出了一种基于光纤光栅的反射式拉锥光纤柔性曲率传感器，通过将单模拉锥光纤植入聚二甲基硅氧烷（polydimethylsiloxane，PDMS）材料中实现对曲率的柔性传感，同时，利用光纤布拉格光栅（fiber Bragg grating，FBG）的波分复用特性，将其与多个拉锥光纤曲率传感器级联，实现了多点拉锥光纤柔性曲率传感，可同时感知多点的曲率信息。实验结果表明，薄膜状的PDMS柔弹性良好，拉锥光纤与PDMS膜能同步弯曲，弯曲灵敏度约为0.593 48~0.606 96 dB/m-1。基于FBG的多点拉锥光纤柔性曲率传感还具有较好的抗串扰能力。进一步地，使用该柔性传感器对喉咙处及手腕处的人体活动监测进行了应用研究，结果表明该传感器不但能检测到人体微小的肌肉变化，也能检测到幅度较大的动作，在人体活动监测领域具有良好的发展前景。

关键词: 光纤布拉格光栅, 单模拉锥光纤, 曲率传感, 聚二甲基硅氧烷

Abstract: Aiming at the shortcomings of the complicated manufacturing process and the high cost of the existing curvature sensors, a flexible curvature sensor based on fiber grating is proposed. Using the wavelength division multiplexing characteristics of fiber Bragg grating (FBG), it is cascaded with multiple taper fiber curvature sensors to realize the flexible curvature of multi-point taper fiber. This enables simultaneous sensing of the curvature information at multiple points. Experimental results show that the film-like PDMS has good flexibility, allowing synchronous bending of the tapered fiber and the PDMS film. The bending sensitivity is about 0.593 48~0.606 96 dB/m-1. The flexible curvature sensing of multi-point taper fiber based on FBG exhibits strong anti-crosstalk ability and can sense the curvature information of multiple points at the same time. Further, the flexible sensor is used to monitor human activity at the throat and wrist. Experimental results show that the sensor can not only detect small muscle changes in the human body but also capture larger movements, which suggests promising prospects for development.

Key words: fiber Bragg grating (FBG), single-mode tapered fiber, curvature sensing, polydimethylsiloxane (PDMS)

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