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Unobtrusive vital signs and activity monitoring based on dual mode fiber
Xu, Wei1,2; Bian, Shihang3; Dong, Bo1,2,4; Shen, Ying3; Han, Shuying3; Yu, Changyuan5; Zhao, Wei1,2,4; Wang, Yishan1,2,4
Source PublicationOptical Fiber Technology
Contribution Rank1

A solid unobtrusive fiber-optic sensor based on modal interference in dual mode fiber (DMF) embedded in a thin mat is proposed and investigated theoretically and experimentally, realizing real-time vital signs and activity monitoring. The whole sensing setup only consists of one laser diode, one section of DMF, one photo-detector and few standard single mode fibers (SMFs). The DMF fiber is sandwiched into the SMFs using core-offset splicing, i.e., SMF-DMF-SMF structure. The optimal value of the core offset is numerically simulated and experimentally validated. It has to be noted that all the fibers used in the experiment are with 900-μm protection jacket, which can effectively avoid fiber breaking. The proposed sensor is both investigated in different postures and different subjects. And the results of vital signs monitoring performance show great consistency compared with commercial monitors. Besides, the activity monitoring is also addressed with one-second discrimination resolution, identifying three basic states, i.e., on bed, body movement and off bed. It is easy to fabricate and shows great potential in future non-invasive vital signs and activity monitoring applications. © 2021 Elsevier Inc.

KeywordDual Mode Fiber Vital Signs Monitoring Activity Monitoring Unobtrusive
Indexed BySCI ; EI
WOS IDWOS:000660470600015
PublisherAcademic Press Inc.
EI Accession Number20211810295262
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Document Type期刊论文
Corresponding AuthorDong, Bo
Affiliation1.State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China;
3.School of Electronic & Information Engineering, Soochow University, 215006, China;
4.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; Shanxi; 030006, China;
5.Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon; Hong Kong, China
Recommended Citation
GB/T 7714
Xu, Wei,Bian, Shihang,Dong, Bo,et al. Unobtrusive vital signs and activity monitoring based on dual mode fiber[J]. Optical Fiber Technology,2021,64.
APA Xu, Wei.,Bian, Shihang.,Dong, Bo.,Shen, Ying.,Han, Shuying.,...&Wang, Yishan.(2021).Unobtrusive vital signs and activity monitoring based on dual mode fiber.Optical Fiber Technology,64.
MLA Xu, Wei,et al."Unobtrusive vital signs and activity monitoring based on dual mode fiber".Optical Fiber Technology 64(2021).
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