Abstract
Respiratory rate is one of the most important factors for assessing human health and mental load. Flexible sensors have gained wide attention in applications for monitoring respiratory rate due to high conformability and maximum non-invasiveness to the human body. Herein, we report a flexible optical fiber respiratory belt (OFRB) sensor that can fit closely to the human skin for human respiration monitoring. This sensor takes an elastic waistband as a carrier, a circular-shaped optical fiber is sewed into the elastic waistband and two Fiber Bragg gratings (FBGs) are connected to both ends of the optical fiber. A dual FBGs light intensity difference algorithm has been adopted to eliminate uncertain light power fluctuation interference. This article provides a description of the characteristics of the OFRB sensor in terms of response to tensile strain and the results indicate a high sensitivity of 0.41 dB/mm, and excellent stretchability of up to 41.5%. Experiments on several static postures and activities of the human body have been conduct to validate the sensing performance of the OFRB sensor. The obtained positive results encourage the OFRB sensor for use in medical care for human respiratory rate monitoring in a non-invasive real-time method.
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Acknowledgment
This work was supported by the National Natural Science Foundation of China under Grant 51905398.
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Li, T., Su, Y., Cheng, H., Chen, F., Tan, Y., Zhou, Z. (2021). Ultra-sensitive and Stretchable Optical Fiber Respiratory Belt Sensor. In: Liu, XJ., Nie, Z., Yu, J., Xie, F., Song, R. (eds) Intelligent Robotics and Applications. ICIRA 2021. Lecture Notes in Computer Science(), vol 13016. Springer, Cham. https://doi.org/10.1007/978-3-030-89092-6_67
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DOI: https://doi.org/10.1007/978-3-030-89092-6_67
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