The effect of textile-based inductive coil sensor positions for heart rate monitoring.
In the research related to heart rate measurement, few studies have been done using magnetic-induced conductivity sensing methods to measure the heart rate. The aim of this study was to analyze the effect of the position of a textile-based inductive coil sensor on the measurement of the heart rate. In order to assess the capability of the textile-based inductive coil sensor and the repeatability of measured cardiac muscle contractions, we proposed a new quality index based on the morphology of measured signals using a textile-based inductive coil sensor. We initially explored eight potential positions of the inductive sensor in a pilot experiment, followed by three sensor positions in the main experiment. A simultaneously measured electrocardiography (ECG) signal (Lead II) which was used as a reference signal for a comparison of the R-peak location with signals obtained from selected positions of the textile-based inductive coil sensor. The result of the main experiment indicated that the total quality index obtained from the sensor position 'P3', which was located 3 cm away from the left side from the center front line on the chest circumference line, was the highest (QI value = 1.30) among the three positions across all the subjects. This finding led us to conclude that (1) the position of the textile-based inductive coil sensor significantly affected the quality of the measurement results, and that (2) P3 would be the most appropriate position for the textile-based inductive coil sensor for heart rate measurements based on the magnetic-induced conductivity sensing principle.
Department of Clothing and Textiles, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, South Korea.
Hye Ran
HR
Koo
Young-Jae
YJ
Lee
Sunok
S
Gi
Seonah
S
Khang
Joo Hyeon
JH
Lee
Jae-Ho
JH
Lee
Min-Gyu
MG
Lim
Hee-Jung
HJ
Park
Jeong-Whan
JW
Lee
D000328:Adult; D015716:Electrocardiography, Ambulatory / Q000295:instrumentation*; D004867:Equipment Design; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008280:Magnetics / Q000295:instrumentation*; D008297:Male; D010865:Pilot Projects; D015203:Reproducibility of Results; D013784:Textiles