Thin Piezoelectric Sheet Assisted PGC Demodulation of Fiber-optic Integrated MZI and Its Application in Under Mattress Vital Signs Monitoring | |
Xu, Wei4; Yu, Changyuan3; Dong, Bo2; Wang, Yishan1; Zhao, Wei1 | |
刊名 | IEEE Sensors Journal
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关键词 | Integrated Mach-Zehnder interferometer matched filter phase generated carrier thin piezoelectric sheet vital signs monitoring. |
ISSN号 | 1530437X;15581748 |
DOI | 10.1109/JSEN.2021.3128601 |
产权排序 | 1 |
英文摘要 | A modified solid fiber-optic integrated Mach-Zehnder interferometer (IMZI) assisted with a thin piezoelectric sheet (TPS, ~ 130um thickness) and phase generated carrier (PGC) demodulation is proposed and investigated theoretically and experimentally. The IMZI's two arms are respectively molded with epoxy resin (EP) and silicone rubber (SI). These two materials are with distinctly different elastic modulus and Poisson ratios, which guarantees the high sensitivity of the IMZI. As for PGC, different modulation frequencies and amplitudes are generated and the corresponding modulation depths are calculated to obtain the optimal modulating parameters. Furthermore, a pair of complementary photodetectors are used to remove unwanted DC component and only the first harmonic is utilized to recover the phase, which can effectively avoid signal fading. In the experiments, where the IMZI is put under the mattress, activity monitoring is addressed and subjects are recruited to investigate the vital signs monitoring performance. The consistency check analysis results show the calculated heart rate variability (HRV) and breath rate variability (BRV) results are highly correlated with reference results, and the Pearson's r reaches 0.99. Moreover, reliability, post-exercise, and Valsalva Maneuver test are further conducted to verify the repeatability and dynamic monitoring capability. In conclusion, the proposed system is unobtrusive, cost-effective, robust, and convenient, which has great potential in future homecare and hospitalization. IEEE |
语种 | 英语 |
出版者 | Institute of Electrical and Electronics Engineers Inc. |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/95627] ![]() |
专题 | 西安光学精密机械研究所_瞬态光学技术国家重点实验室 |
作者单位 | 1.State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China, and Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. 2.College of new materials and new energy, Shenzhen Technology University, Shenzhen 518118, China. (e-mail: dongbo@sztu.edu.cn); 3.Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong.; 4.State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China, and University of Chinese Academy of Sciences, Beijing 100049, China.; |
推荐引用方式 GB/T 7714 | Xu, Wei,Yu, Changyuan,Dong, Bo,et al. Thin Piezoelectric Sheet Assisted PGC Demodulation of Fiber-optic Integrated MZI and Its Application in Under Mattress Vital Signs Monitoring[J]. IEEE Sensors Journal. |
APA | Xu, Wei,Yu, Changyuan,Dong, Bo,Wang, Yishan,&Zhao, Wei. |
MLA | Xu, Wei,et al."Thin Piezoelectric Sheet Assisted PGC Demodulation of Fiber-optic Integrated MZI and Its Application in Under Mattress Vital Signs Monitoring".IEEE Sensors Journal |
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