Fatigue characteristics of driver in Qinghai-Tibet Plateau based on electrocardiogram analysis
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摘要: 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、0.615 s; 大型车与小型车驾驶人在海拔4 600m比在海拔3 500 m的疲劳时间点分别提前20.8、8.4 min, 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。Abstract: In order to obtain the fatigue characteristics of driver in plateau environment, three test sites with different altitudes and 20 d rivers were selected to do simulation tests, heart rate change of driver and driving behaviors were recorded in test process, the changing rate of heartbeat interval was regarded as the evaluation index to do fatigue research and verify its rationality, receiver operating characteristic(ROC)curve was used to determine the fatigue time point, and binary Logit model of driver fatigue was built. Analysis result shows that when the altitudes are 3 500, 4 200 and 4 600 m respectively, the average heartbeat intervals of driver are 0.759, 0.746 and 0. 615 srespectively. The fatigue time points of large vehicle and small vehicle drivers at the altitude of 4 600 m respectively advance by 20. 8 and 8.4 min compared with altitude of 3 500 m. The higher the altitude is, the earlier the fatigue time point comes. Every one unit increases of time length and change rate of heartbeat interval result in 1.215 and 1.139 times of fatigue happening ratio respectively. The fatigue happening ratio of large vehicle driver is 14. 6% of fatigue happening ratio of small vehicle driver, so large vehicle driver shows stronger fatigueresistance ability.
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Key words:
- traffic safety /
- Qinghai-Tibet Plateau /
- fatigue characteristic /
- heartbeat interval /
- heart rate /
- driving simulation
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图 6 不同海拔条件下时间与心率、心跳间隔之间的关系
Figure 6. Relationship among time, heart rate and heartbeat interval at different altitudes
图 8 外地大型车驾驶人疲劳变化曲面
Figure 8. Fatigue change surfaces of nonlocal large vehicle drivers
图 9 外地小型车驾驶人疲劳变化曲面
Figure 9. Fatigue change surfaces of nonlocal small vehicle drivers
图 10 外地大型车与小型车驾驶人疲劳曲线
Figure 10. Fatigue curves of nonlocal large vehicle and small vehicle drivers
表 3 不同海拔条件下大型车与小型车驾驶人的疲劳时间点
Table 3. Fatigue time points of large vehicle and small vehicle drivers under different altitudes
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