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Respiration Measurement System using Textile Capacitive Pressure Sensor

전기용량성 섬유 압력센서를 이용한 호흡측정 시스템

  • 민세동 (연세대 공대 전기전자공학과) ;
  • 윤용현 (연세대 공대 전기전자공학과) ;
  • 이충근 (연세대 공대 전기전자공학과) ;
  • 신항식 (연세대 공대 전기전자공학과) ;
  • 조하경 (연세대 공대 전기전자공학과) ;
  • 황선철 (인덕대학 방송영상미디어과) ;
  • 이명호 (연세대 공대 전기전자공학과)
  • Published : 2010.03.01

Abstract

In this paper, we proposed a wearable respiration measurement system with textile capacitive pressure sensor. Belt typed textile capacitive pressure sensor approach of respiration measurement, from which respiration signatures and rates can be derived in real-time for long-term monitoring, are presented. Belt typed textile capacitive pressure sensor has been developed for this measurement system. the distance change of two plates by the pressure of motion has been used for the respiration measurement in chest area. Respiration rates measured with the textile capacitive pressure sensor was compared with standard techniques on 8 human subjects. Accurate measurement of respiration rate with developed sensor system is shown. The data from the method comparison study is used to confirm theoretical estimates of change in capacitance by the distance change. The current version of respiratory rate detection system using textile capacitive pressure sensor can successfully measure respiration rate. It showed upper limit agreement of $3.7997{\times}10^{-7}$ RPM, and lower limit of agreement of $-3.8428{\times}10^{-7}$ RPM in Bland-Altman plot. From all subject, high correlation were shown(p<0.0001). The proposed measurement method could be used to monitor unconscious persons, avoiding the need to apply electrodes to the directly skin or other sensors in the correct position and to wire the subject to the monitor. Monitoring respiration using textile capacitive pressure sensor offers a promising possibility of convenient measurement of respiration rates. Especially, this technology offers a potentially inexpensive implementation that could extend applications to consumer home-healthcare and mobile-healthcare products. Further advances in the sensor design, system design and signal processing can increase the range and quality of the rate-finding, broadening the potential application areas of this technology.

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