Photoplethysmogram measurement without direct skin-to-sensor contact using an adaptive light source intensity control.
We developed a chair-attached, nonintrusive photoplethysmogram (PPG) measuring system for everyday life, unconstrained monitoring using nonskin-contacting sensor-amplifier circuits capable of emitting suitable light intensity adaptable to clothing characteristics. Comparison between proposed and conventional systems showed reasonable correlation and root-mean-squared error levels, indicating its feasibility for unconstrained PPG monitoring.
Graduate Program in Bioengineering, Seoul National University, Seoul 110-799, Korea. hyunjae100@bmsil.snu.ac.kr
Hyun Jae
HJ
Baek
Gih Sung
GS
Chung
Ko Keun
KK
Kim
Jung Soo
JS
Kim
Kwang Suk
KS
Park
D003020:Clothing; D004867:Equipment Design; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods*; D017156:Photoplethysmography / Q000295:instrumentation* / Q000379:methods*; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted