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为了得出驾驶人在高原环境下的疲劳特性,选取3个不同海拔的试验点与20名驾驶人进行模拟试验,对试验过程中驾驶人的心率变化与驾驶行为进行记录,以心跳间隔变化率为评价指标进行疲劳研究并验证其合理性,采用受试者工作特征曲线确定疲劳时间点,建立了驾驶人疲劳的二元Logit模型。分析结果表明:海拔为3 500、4 200、4 600 m时,驾驶人平均心跳间隔分别为0.759、0.746、0.615s;大型车与小型车驾驶人在海拔4 600m比在海拔3 500m的疲劳时间点分别提前20.8、8.4min,海拔越高疲劳时间点出现越早;时间、心跳间隔变化率每增加一个单位,发生疲劳的比率分别是原来的1.215、1.139倍;大型车驾驶人发生疲劳的比率是小型车驾驶人的14.6%,表明大型车驾驶人表现出更强的抗疲劳能力。
In order to get the fatigue characteristics of the driver under high altitude environment, three test points at different elevations and 20 drivers were selected to simulate the changes of heart rate and driving behavior during the test. The change rate of heartbeat interval The fatigue index was evaluated and its rationality was verified. The fatigue time was determined by using the working characteristic curve of the subject, and a binary Logit model of driver fatigue was established. The results showed that the mean heartbeat intervals of drivers were 0.759, 0.746 and 0.615s respectively at 3 500, 4 200 and 4 600 m; for large and small car drivers at 4 600m above sea level at a fatigue time of 3 500m above sea level Points were 20.8,8.4min earlier, the higher the elevation of fatigue time points appear earlier; time, heart rate interval change rate for each additional unit, the occurrence of fatigue were the original 1.215,1.139 times the rate of fatigue; large car drivers fatigue ratio Which is 14.6% of the drivers of small cars, indicating that the drivers of large cars show more resistance to fatigue.