J1102-1-1 心拍変動による精神ストレスの短時間解析に関する研究(ライフサポート1:生体計測)

概要

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We have researched the simply technique for analyzing mental stress by heart beat information. It is known that the heartbeat intervals (RRI) fluctuate by the stress. Especially, the index named LF/HF that means the power in low frequency band (LF) is divided by the power in high frequency band (HF) for the frequency analysis of RRI is often used. In general, it is said that the data of five minutes is necessary for the frequency analysis. However, five minutes are long when thinking about the consumer use. This paper proposes consideration of the technique of stress analysis from short data of heartbeat intervals. Concretely, we enable the analysis by removing the noise element included in RRI by using Kalman filter. It is shown that the stability of the analysis was improved by using the filter by the experiment.
2009-09-12