柔性基体光纤光栅脉搏波传感器特性  

Characteristics of Flexible Fibre Bragg Grating Pulse Wave Sensor

作　　者：葛子阳 王彦[1,2] 赵慧 金萍 范保存 GE Ziyang;WANG Yan;ZHAO Hui;JIN Ping;FAN Baocun(AnhuiProvincial Key Laboratory of Power Electronics and Motion Control(AnhuiUniversity of Technology),Maanshan,Anhui 243000,China;School of Electrical and Information Engineering,Anhui University of Technology,Maanshan,Anhui 243000,China;Shandong Huaning Mining Group Co.,Ltd.,Taian,Shandong 271400,China)

机构地区：[1]安徽省高校电力电子与运动控制重点实验室(安徽工业大学),安徽马鞍山243000 [2]安徽工业大学电气与信息工程学院,安徽马鞍山243000 [3]山东华宁矿业集团有限公司,山东泰安271400

出　　处：《光子学报》2021年第12期285-294,共10页Acta Photonica Sinica

基　　金：国家重点研发计划(No.2017YFC0805103);安徽省教育厅自然科学基金重点项目(Nos.KJ2017A041,KJ2018A0042)。

摘　　要：针对强电磁干扰环境下,压电、光电类脉搏波传感器易受干扰的缺点,提出一种柔性材料封装的光纤布拉格光栅脉搏波传感器,用于测量人体桡动脉脉搏信号。首先使用comsol有限元仿真软件,探究最优的封装厚度和光纤在基材中的位置。根据仿真结果,结合应变传递效果和传感器的灵活性,优化选择传感器厚度为5 mm,光纤封装在距离基体下表面1 mm处。以此制作了柔性光纤布拉格光栅脉搏波传感器,对十名测试者的人体桡动脉脉搏进行采集,采用改进的阈值小波方法去噪,去噪后的信号能很好的保留脉搏波信号的特征点,信噪比均达到了40以上,且峰值点、潮波点和重搏波点识别率分别达到100%,100%和90%。本文设计的柔性基体FBG脉搏波传感器能有效获取及识别脉搏波信号,为进一步的应用提供了理论基础及应用支撑。To address the shortcomings of piezoelectric and optoelectronic pulse wave sensors that are susceptible to interference in strong electromagnetic interference environments,a flexible material encapsulated Fibre Optic Grating(FBG)pulse wave sensor is proposed for measuring human radial artery pulse signals.The optimal package thickness and the position of the optical fibre in the substrate were first investigated using comsol finite element simulation software.Based on the simulation results,the sensor thickness of 5 mm and the optical fibre encapsulation at 1 mm from the lower surface of the substrate were optimised to combine the strain transfer effect and the flexibility of the sensor.The FBG flexible pulse wave sensor was fabricated and the human flexural artery pulses were collected from ten test subjects.The denoised signals were well preserved by a modified threshold wavelet method,and the signal-to-noise ratios were above 40,and the peak,tidal and repulse waveform recognition rates were 100%,100%and 90%respectively.The results show that the flexible substrate FBG pulse wave sensor can effectively acquire and identify pulse wave signals,providing a theoretical basis and application support for further applications.

关 键 词：光纤布拉格光栅 应变传递 脉搏波 小波去噪 

分 类 号：TN253[电子电信—物理电子学]