Low-Cost Wearable Sensor Based on a D-Shaped Plastic Optical Fiber for Respiration Monitoring

Wang, Yulin; Liu, Bin; Pang, Yi-Neng; Liu, Juan; Shi, Jiulin; Wan, Shengpeng; He, Xingdao; Yuan, Jinhui; Wu, Qiang

doi:10.1109/tim.2021.3075033

Cited by 29 publications

(12 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…( 4) can be further rewritten as Eq. (10). The term k j is a constant that represents phase sensitivity.…”

Section: Principle and Numerical Analysismentioning

confidence: 99%

“…NTERFEROMETRIC fiber sensors (IFSs) are widely used for measuring external environmental parameters, including gas refractive indices [1], temperature [2,3,4], strain [5,6], salinity [7], glucose [8], force [9] and respiration [10], because of their many advantages, such as low cost, simple fabrication, small size, anti-electromagnetic interference and high sensitivity/resolution. Generally, IFSs can simultaneously measure dual parameters [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase Demodulation Based on K-Space With High Sensitivity for Interferometric Fiber Sensor

Ling

Tian

et al. 2022

IEEE Photonics J.

View full text Add to dashboard Cite

This study firstly proposes and experimentally demonstrates a phase demodulation method with high sensitivity for interferometric fiber sensors (IFSs) on the basis of the fast Fourier transform of a wavenumber domain. The phase information of IFSs triggered by changes in environmental parameters is obtained by calculating the initial phase variation of a specific Fourier-transformed spatial frequency. Theoretically, phase sensitivity can be improved by n times when the optical path difference (OPD) of a spatial frequency peak is increased by a multiple (n times) of the OPD of other spatial frequency domain peaks. To verify the method experimentally, this study designed a large laterally offset spliced sensor formed by common singlemode fibers on the basis of mode interference. The sensing characteristics of temperature and strain in each set of two-beam interference are analyzed simultaneously by calculating the phase sensitivities of the frequency domain peaks. Furthermore, the highest reported temperature and strain sensitivities of 0.0795 rad/°C and −0.0088 rad/με, respectively, with good repeatability are realized.

show abstract

“…( 4) can be further rewritten as Eq. (10). The term k j is a constant that represents phase sensitivity.…”

Section: Principle and Numerical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase Demodulation Based on K-Space With High Sensitivity for Interferometric Fiber Sensor

Ling

Tian

et al. 2022

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

“…A portion of them is based on a modular design concept, which integrates the light source, sensing unit, and detector in space to form a compact sensing architecture. For example, Wang et al 19 proposed a low-cost, wearable, textile-based, respiratory sensing system. In the approach, a D-shaped POF sensor was fixed on an elastic belt to sense bending deformation, and an LED light source and optical receiver were customized with small packaging.…”

Section: Introductionmentioning

confidence: 99%

“…Research on miniaturized POF sensing systems has increased greatly as driven by wearable application scenarios [17][18][19] . A portion of them is based on a modular design concept, which integrates the light source, sensing unit, and detector in space to form a compact sensing architecture.…”

mentioning

confidence: 99%

Miniature optical fiber curvature sensor via integration with GaN optoelectronics

Shi

Zhang

et al. 2022

Commun Eng

View full text Add to dashboard Cite

Optical fiber curvature sensors have been considered as a promising option for human motion detection due to its good toughness, bending flexibility and anti-electromagnetic interference. However, for wearable devices, the miniature configuration is preferred, and a high integration of the light emitter, receiver and guided fiber is essential to configure the miniaturized sensing system. Here, we present a miniaturized curvature sensing system by integrating a GaN-based optoelectronic chip with the plastical optical fiber (POF). The light emitter and detector are fabricated on a GaN-on-sapphire wafer to form a tiny chip sized at 2.5 $$\times$$ × 1.5 mm2. The on-chip photodetector (PD) effectively senses the reflected light intensity, extracting information on the fiber bending deformation. A compact curvature sensing system is demonstrated for finger motion detection with movement angles of 30–90° and frequencies of 0.4, 1, and 1.6 Hz. The results show that the monolithically integrated LED and PD chip can be combined with the POF with reliable operation. The demonstration of the monolithically integrated optoelectronic device suggests a promising potential technology for future wearable fiber optical sensor system.

show abstract

“…In 2021, N. V. Kumar et al proposed blood pressure pulse monitor based on fiber grating sensor [36]. In 2021, Y. L. Wang et al proposed a low-cost wearable respiratory monitoring system based on D-shaped plastic fiber, which can monitor the respiratory frequency of human body in real time [37]. However, the above health monitoring system has some disadvantage, either high cost of equipment, or complex structure, low sensitivity, difficult to operate, such as the manufacturing cost of FBG is higher than that of SMF, and the demodulation of FBG is far more complex than that of SMF.…”

Section: Introductionmentioning

confidence: 99%

Low-cost wearable device based D-shaped single mode fiber curvature sensor for vital signs monitoring

Liu

et al. 2022

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

Low-Cost Wearable Sensor Based on a D-Shaped Plastic Optical Fiber for Respiration Monitoring

Abstract: Qiang (2021) Low-cost wearable sensor based on a D-shaped plastic optical fiber for respiration monitoring. IEEE Transactions on Instrumentation and Measurement.

Cited by 29 publications

References 46 publications

Phase Demodulation Based on K-Space With High Sensitivity for Interferometric Fiber Sensor

Phase Demodulation Based on K-Space With High Sensitivity for Interferometric Fiber Sensor

Miniature optical fiber curvature sensor via integration with GaN optoelectronics

Low-cost wearable device based D-shaped single mode fiber curvature sensor for vital signs monitoring

Contact Info

Product

Resources

About