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JOURNAL OF MECHANICAL ENGINEERING  > 2021  >  48(3): 200100.
Wu Yingjie, Wu Zhilin, Wang Lin, Nian Weiqi, He Yong, Guo Yongcai. Respiratory rate monitoring system based on inorganic halide perovskite humidity sensor[J]. JOURNAL OF MECHANICAL ENGINEERING, 2021, 48(3): 200100. doi: 10.12086/oee.2021.200100
Citation: Wu Yingjie, Wu Zhilin, Wang Lin, Nian Weiqi, He Yong, Guo Yongcai. Respiratory rate monitoring system based on inorganic halide perovskite humidity sensor[J]. JOURNAL OF MECHANICAL ENGINEERING, 2021, 48(3): 200100. doi: 10.12086/oee.2021.200100
shu

Respiratory rate monitoring system based on inorganic halide perovskite humidity sensor

doi: 10.12086/oee.2021.200100
Funds:

National Key R & D Plan for Major Instruments 2016YFF0102802

Chongqing Key Instrument Project cstc2017zdcy-zdzxX0009

Funded by Special Fund for Performance Incentive Guidance of Scientific Research Institutions in Chongqing cstc2019jxjl130029

Chongqing Natural Science Foundation cstc2018jcyjA3233

Chongqing Natural Science Foundation cstc2019jcyj-msxmX0623

Fundamental Scientific Research Business of Central Universities 2018CDQYGD0008

Fundamental Scientific Research Business of Central Universities 2018CDXYGD0017

Fundamental Scientific Research Business of Central Universities 2019CDQYGD004

Chongqing Graduate Research and Innovation Project CYS19011

More Information
  • Corresponding author: Guo Yongcai, E-mail: ycguo@cqu.edu.cn
  • Received Date: 23 Mar 2020
  • Rev Recd Date: 06 Nov 2020
    Abstract
  • The traditional respiratory rate measurement technologies have several deficiencies, such as subjective appraised results, complicated signal extraction processes, difficult access to equipment, and inconvenience to move due to the wired connection setting. The respiratory airflow can directly reflect the human breath, and the respiratory frequency is usually 10~12 breaths/min (1 ventilation every 5~6 seconds). The humidity difference between exhalation and inhalation can be directly used to measure respiratory rate. In the present work, a wireless respiratory rate monitoring system based on inorganic halide perovskite humidity sensor was developed. The sensor exhibits an ultrasensitive humidity sensing performance, which overcomes the long response/recovery time (> 10 seconds) of the commercial humidity sensors. The system utilized a Zigbee wireless communication to transmit the measurement signal, which separates the signal detection and processing parts, making it easier for the tester to move. The upper computer software was designed and used for data processing to calculate the breathing rate. The system can accurately monitor the respiratory rate in real-time, recognize and alarm the apnea successfully by comparing with a setting threshold value. The test results show that the system can accurately monitor the breathing rate with a maximum error of 1 time per minute. The system possesses great potential for application in respiratory rate monitoring due to its high accuracy, simple operation, portability, and low cost.

     

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