草原公路直线段长度对驾驶员心率变异性的影响研究

Research on the Effect of Prairie Road Straight Line Length on Drivers' HRV

通过草原公路实驾试验,采集了14名驾驶员在六段长度不同的相邻直线段上的心电数据,通过Kubios HRV软件分析心率变异指标SDNN值和LF/HF值,以探究草原公路直线段长度对驾驶员心率变异的影响。对SDNN值和LF/HF值进行非参数检验,结果表明个体差异对SDNN值影响大,而对LF/HF值影响小,因此可以用LF/HF值来评价直线段长度对驾驶员的影响。在一定范围内,随着草原公路直线段长度的增大,驾驶员的LF/HF值有先增大后减小的趋势,但是不同气质驾驶员的极大LF/HF值对应的直线段长度值不一样,超过该长度后,随着直线段长度的增大,驾驶员的警惕性会逐渐减小,适合草原公路驾驶员心生理情况的直线段长度应该控制在极大直线段长度左右。

14 ECG data were couected on a sixth straight lines of different lengths of adjacent segments through real prairie road driving test, the heart rate variability index SDNN values and LF/HF values were analyzed through Kubios HRV software to explore the prairie road length effects on heart rate variability of drivers. Nonparametrie tests the SDNN values and LF/HF values, the results show that individual differences have great influence on SDNN values but little influence on LF/HF values, so LF/HF values can used to evaluate the effect of the length of the line segment to the drivers. With increasing of prairie road line segment length in a certain range, LF/HF values of drivers has a tendency that first increase and then decrease, but the great length of the line segment LF/HF values corresponding to the different qualities of the drivers, over this length, with the increases of the length of the straight section, the driver＇ s vigilance will gradually decrease, the length of the line segment suitable prairie road driver＇s physiological conditions should be controlled at about the great length straight line.