Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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PPG Filtering Method for Respiration Measurement in U-Health Care System

U-Health Care 환경에서 호흡측정을 위한 PPG 최적필터기술

  • 김종화 (상명대학교 컴퓨터 과학과) ;
  • 황민철 (상명대학교 디지털미디어학부) ;
  • 남기창 (한국전기연구원)
  • Published : 2008.11.30
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Abstract

This research is to develop PPG filtering method for respiration measurement in U-Health Care system. Respiration rate was determined by filtering PPG and analyzing its spectrum. Optimal filter of PPG has been selected to get respiration by testing 120 sets of experiment data using 700 filtering cases. As a result, 2nd order Bessel-filter that used band-pass cutoff frequency at 0.175~0.4Hz with second order was good at developing respiration signal. Respiration signal in time domain could be continuously analyzed by converting frequency domain using spectrum analysis. 24 seconds has been found to be optimal time duration of collecting PPG data for determining respiration. Therefore, this study was successful of getting not only heart activity but also respiration by only PPG. Minimal invasive measurement obtaining multi-bio information by one sensor can be expected to apply to U-Health Care and human computer interaction.

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References

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