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A non-contact flexible pyroelectric sensor for wireless physiological monitoring system

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Abstract

Recently, human physiological information wireless monitoring in real-time is particularly important in health analysis. As a solution, a non-contact wireless physiological monitoring system based on pyroelectric generator (PyG), whose core part consists of a wireless circuit processing module and a polyvinylidene fluoride (PVDF) film, has been successfully designed. Owing to the temperature change under the stimulation of an external heat source, the output voltage of the PyG self-powered flexible sensor increases with the heat source temperature variation in the range of 295–355 K. Furthermore, based on the natural temperature oscillation between the living body and surrounding environment, the sensor can realize human physiological information assessment, for example, temperature monitoring of the palms, fingers, respiratory heat signals from mouth or nose or non-contact spatial heat mapping recognition of finger movement via sensor array. On this basis, a portable wireless monitoring system was designed by integrating the intelligent sensor with a signal conditioning circuit, data conversion storage module, Bluetooth module, and power module. This system can acquire real-time human oral or nasal breathing signals in the personal mobile app to evaluate the physiological state of individuals. Additionally, the wireless monitoring system can be activated within 10 m, demonstrating the application of PyG sensors in remote data transmission.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 51705476, 51975542), National Key R&D Project of China (Grant Nos. 2018YFF0300605, 2019YFF0301802), Shanxi “1331 Project” Key Subject Construction (Grant No. 1331KSC), Young Academic Leaders of North University of China (Grant No. QX201805), Program for the Innovative Talents of Higher Education Institutions of Shanxi, and Applied Fundamental Research Program of Shanxi Province (Grant Nos. 201801D221199, 201901D211281). The volunteer who participated in human testing provided informed consent.

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Author notes

  1. These authors contributed equally to this work.

Authors and Affiliations

  1. Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan, 030051, China

    Jian He, Sen Li, Xiaojuan Hou, Min Cui, Tao Guo, Jiliang Mu, Wenping Geng & Xiujian Chou

  2. Science and Technology on Near-Surface Detection Laboratory, Wuxi, 214035, China

    Yongjun Zhou & Hao Li

  3. China Institute of Sport Science, Beijing, 100061, China

    Xiangdong Wang

Authors
  1. Jian He
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  2. Sen Li
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  3. Xiaojuan Hou
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  4. Yongjun Zhou
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  5. Hao Li
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  6. Min Cui
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  7. Tao Guo
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  8. Xiangdong Wang
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  9. Jiliang Mu
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  10. Wenping Geng
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Corresponding authors

Correspondence to Xiangdong Wang or Xiujian Chou.

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Supporting information

Figures S1–S6, Table S1, Videos S1–S3. The supporting information is available online at info.scichina.com and link.springer.com. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors.

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A non-contact flexible pyroelectric sensor for wireless physiological monitoring system

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He, J., Li, S., Hou, X. et al. A non-contact flexible pyroelectric sensor for wireless physiological monitoring system. Sci. China Inf. Sci. 65, 122402 (2022). https://doi.org/10.1007/s11432-020-3175-6

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  • DOI: https://doi.org/10.1007/s11432-020-3175-6

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