5202 ドライバの心理的高負荷状況の検出と低減の方策(DS2 ドライバモニタリングと追突回避支援,ディベロップメント・セッション)

概要

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An investigation for quantifying the automobile driver's mental workload was conducted by analyzing fluctuations in finger pulse, which were measured by a sensor on the steering wheel; the experiment was carried out in a driving simulator with 20 participants. The Lyapnov exponent quantifying the fluctuation of finger pulse was evaluated in terms of the accuracy to detect the hazardous driving situation brought on by a high mental workload. The ratio of the Lyapnov exponent relative to that during the ordinary driving situation fluctuated in the same range larger than 120[%] when the driver's mental workload was high. It is possible to estimate that the driver is facing the hazardous driving situation if the ratio of Lyapnov exponent of finger pulse is higher than 120 [%]. In addition to that, the effect of tree aroma on an automobile driver's mental workload was investigated. The fluctuation of the driver's finger pulse in terms of Lyapnov exponent was used to analyze mental workload. It was found that the tree aroma Alpha-Pinene minimizes the fluctuation of finger pulse and lowers the mental workload in terms of workload scores of NASA-TLX, and thus is beneficial in terms of active safety during car driving.
社団法人日本機械学会の論文
2008-12-09