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通过检测驾驶员心理、生理指标,观察公路线形复杂程度对驾驶员心率变异性(HRV)的影响,研究不合理公路线形对驾驶员行车安全的影响。对内蒙古境内6条公路的线形资料进行调查统计,利用赋值打分法确定各自的复杂程度;选取典型路段进行实驾试验,通过二列相关系数的计算及相应检验,得到心率变异分析的敏感指标;进而分析公路线形复杂程度对驾驶员心理、生理的影响。结果表明,HRV指标间期均值(MRR)、低高频比值(LF/HF)、样本熵(Samp En)对公路线形复杂程度响应敏感;即复杂程度过低会导致驾驶员由于驾驶任务简单出现反应迟缓、注意力难以集中等现象,影响行车安全;复杂程度过高会使驾驶员时刻保持精神高度集中状态,容易提前产生疲劳,从而威胁行车安全。
By detecting the driver’s psychological and physiological indexes, observing the influence of the complexity of the road alignment on the driver’s heart rate variability (HRV), the impact of the unreasonable road alignment on the driving safety of the driver is studied. The survey and statistics on the linear data of 6 highways in Inner Mongolia were carried out. The assignment complexity method was used to determine the complexity of each road. A typical section was selected for the actual driving test. The correlation coefficient of two columns was calculated and the corresponding test was conducted to get the sensitive index of heart rate variability analysis. And then analyze the complexity of highway alignment on the driver psychological, physiological impact. The results show that MRR, LF / HF and Samp En are sensitive to the complexity of highway alignment. That is to say, if the complexity is too low, Slow response, concentration is difficult to concentrate on the phenomenon, affecting traffic safety; high complexity will make the driver always maintain a high degree of mental state, prone to fatigue in advance, thus threatening traffic safety.