草原公路直线段交通工程设施信息量对驾驶员心率变异性的影响研究

Study on Influences of Traffic Engineering Facilities Information Quantity on Driver’s HRV in Straight Section of Grassland Highway

针对草原公路直线路段交通工程设施设置现状与存在的问题,搭建室内模拟试验场景,进行6种信息量条件下的驾驶员心率变异性研究,应用灰色关联度分析方法确定敏感评价指标,并建立数学模型,定量研究驾驶员心率变异指标随交通工程设施信息量等级变化的规律,确定适宜信息量范围。试验结果表明,驾驶员的最适心率变异评价指标为RR间期(每一次心脏跳动间的间隔时间)的标准差(SDNN)、心率变异低频(LF)与心率变异高频(HF)之比;熟练与非熟练驾驶员在信息量为Z2(10~20 bits/km)条件下心理调节水平相对较高、注意力较集中、对交通工程设施的关注程度较高,更利于安全行车;随交通工程设施信息量等级变化,熟练与非熟练驾驶员二者相比,前者对交通工程设施的关注度较高、心理调节水平较高、注意力较集中。

Aiming at the current situation and existing problems of traffic engineering facilities on the straight section of grassland highway,the indoor simulation experiments were carried out and test scene was built to study the driver’s heart rate variability under six kinds of information guantity conditions.By using grey relational degree analysis method and establishing regression mathematical curve model,this paper quantitatively studied the variation rule of driver’s heart rate variability index with the information guantity of traffic engineering facilities,and the appropriate range of information guantity was determined.The test results showed that:the optimum HRV indexes for drivers with the change of traffic engineering facilities information guantity were SDNN and LF/HF.Experienced and inexperienced drivers had a relatively high level of psychological adjustment,concentration and attention to traffic engineering facilities under the condition of Z2(1020 bits/km)information guantity,it was more conducive to safe driving.With the change of traffic engineering facilities information guantity,compared with inexperienced drivers,experienced drivers paid more attention to traffic engineering facilities,had higher level of psychological adjustment,and paid more attention.