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A Method for Estimating a Stress State Using a Pulse Sensor for QOL Visualization

This paper proposes method for estimating a stress state by using pulse sensor obtaining from wearable devices in order to identify long-term stress factors in daily life. For the method, we use LF/HF (Low Frequency / High Frequency), which is derived from the fluctuation of the peak intervals of heartbeat, and is an indicator of the psychological stress state. The proposed method estimates LF/HF by using a pulse instead of the heartbeat, and formulates Stress and Relaxed Value (SRV) as a Quality of Life (QOL) indicator on the basis of LF/HF. In addition, we conduct an experiment comparing pulse data, obtaining from pulse sensor and pulse wave obtaining from the pulse wave monitor. The experimental result shows that the same trend can be recognized on these data.