基于脑电特性的荒漠化地区公路最大直线长度研究

Study on the Maximum Straight Line Length of the Highway in the Desertification Area Based on EEG

荒漠化地区公路路域景观单调,直线长度过长,缺乏必要的行车信息刺激,易导致驾驶员心理疲劳,严重威胁到行车安全。为了找到符合驾驶员心理、生理需求的荒漠化地区公路最大直线长度,在三条典型荒漠化公路直线段上进行行车试验,分析脑电信号与直线长度及车速的关系,利用SPSS软件建立脑电信号与直线长度的回归模型。结果表明:脑电β波与直线长度呈负相关,与车速不相关;脑电指标(α+θ)/β与直线长度呈正相关,与车速不相关;提出了基于脑电信号的荒漠化地区公路最大直线长度建议值为5.83 km。结果可为荒漠化地区公路线形设计提供部分理论支撑。

The landscape in the desertification area is monotonous,and the length of straight line is too long to support adequate stimulus for drivers,which easily leads to the psychological fatigue and the threat to driving safety. In order to find the maximum straight line length of the highway in the desertification area,the field test has been conducted to analyze the relationship among the EEG signals,straight line length and the speed. During the data processing,the regression model of the signal and straight line length has been established. And the results show that β wave of EEG has a negative correlation with straight line length,but not associated with speed,and the ratio of（ α ＋ θ） / β has a positive correlation with straight line length,but not associated with speed too,moreover,the maximum straight line length is recommended to be 5. 83 km as the optimal length. In conclusion,the results based on this articles can providing theoretical support for the design of highway alignment in the desertification area.