草原公路驾驶员心电指标对标志标牌 信息量的敏感性

为验证驾驶员心电指标(electrocardiogram,ECG)对草原公路标志标牌信息量的敏感性,选取5名驾驶员开展草原公路实驾试验,分析驾驶员心电指标随标志标牌信息量变化规律,通过相关性分析、斜率分析方法研究各驾驶员心电指标变化趋势的相关性和单位时间内各心电指标受信息量变化的影响规律。结果表明:草原公路标志标牌信息量变化对驾驶员MRR(RR间期均值)和NN50(相邻间期差值大于50 ms的个数)指标值影响较大,其中与MRR指标值变化关联度为81. 82%,与NN50指标值变化关联度为63. 64%,因此可选用MRR值和NN50值来评价草原公路标志标牌信息量对驾驶员心电特性的影响;随着标志标牌信息量的增加,驾驶员MRR值呈下降趋势,NN50值呈上升趋势,驾驶员注意力集中,警惕性较高。

Study on Sensitivity of Driver's ECG Index to Information Volume of Traffic Signs of Grassland Highway

In order to verify the sensitivity of the driver''s ECG indicator to the information volume of traffic signs on the grassland, five drivers were selected to carry out the actual driving test on the grassland road, the change law of driver''s ECG index and signage information volume of traffic signs was analyzed. Correlation analysis and slope analysis method are used to study the correlation between the changes of ECG indicators and the influence of ECG indicators on the information volume of traffic signs. The results show that the information volume change of the traffic signs on grassland road has a great influence on the MRR and NN50 index values of the drivers. The correlation degree with the MRR index value is 81.82%, and the correlation degree with the NN50 index value is 63.64%. Therefore, the MRR value and NN50 value can be selected to evaluate the impact of information volume of traffic signs on grassland road on the driver''s ECG characteristics; with the increase of information volume of traffic signs, the driver''s MRR value shows a downward trend and the NN50 value shows an upward trend, the driver''s attention is concentrated and more vigilant.