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KMID : 1137820100310020170
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의공학회지
2010 Volume.31 No. 2 p.170 ~ p.175
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Heart-rate Measurement During Exercise Using PPG Signal
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Lee Keun-Sang
Baek Young-Hyun
Park Young-Chool
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Abstract
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A method of measuring heart rate using photoplethysmograph(PPG) signal during exercise is proposed. PPG’s are composed of strong base tones and their harmonics, and the strong base tones are trackable by the adaptive notch filter (ANF) which adjusts its coefficients to minimize the output power. The proposed heart rate measurement algorithm continuously notches the frequency component with the maximum power in the measured PPG, so that the fundamental frequency corresponding to heart rate is traced. We also presents methods of detecting degeneration and impulsive noise blocks to minimize the coefficient fluctuation. Experiments were conducted using real PPG signals captured during exercise. Results showed that the proposed algorithm is capable of consistently tracking the heart rate embedded in the noisy PPG’s.
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KEYWORD
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PPG, Heart Rate, Adaptive Notch Filter, Degeneration, Impulsive Noise
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