草原公路长直线段最佳信息量阈值研究

doi:10.16265/j.cnki.issn 1003-3033.2021.06.025

摘要/Abstract

摘要： 为优化草原公路单调景观环境,提高驾驶员安全行车水平,采用模拟驾驶试验方法,根据真实路况信息设计双车道二级草原公路,按照单位信息量1～5个/km设置5种不同的信息量环境,选择40名被试进行试验,提取眨眼持续时间、注视持续时间、瞳孔直径、扫视幅度4个眼动敏感指标,量化不同信息量环境下驾驶员眼动指标变化特征,建立信息量与眼动指标关系模型,对二次曲线进行拟合并求导。研究结果表明:眼动指标与信息量呈U形关系,4个/km是最佳信息量阈值,此环境下驾驶员眼动指标变化率最大,提取处理信息量最多,此阈值下景观环境不宜触发“单调”;当信息量阈值大于或小于4个/km时,驾驶员眼动指标的变化率均会减小。

关键词: 草原公路, 长直线段, 信息量阈值, 眼动指标, 驾驶员

Abstract: In order to optimize monotonous landscape environment of grassland highways and improve driving safety of drivers, simulated driving experiment method was adopted to design a two-lane second-class grassland highway based on real road information. Different information densities were set for a range of 1-5/km, 40 subjects were selected and tested for four eye movement sensitivity indices including blink duration, fixation duration, pupil diameter and saccade range. Then, variation rules of their eye movement indices under different information amount environment were quantified, a relationship model between information content and indices was established, and derivative of the conic in terms of quasi combination was taken. The results show that relationship between information amount and eye movement indices is U-shaped, and 4/km makes the optimal information threshold under which change rate of indices reaches the largest with the utmost information extracted and landscape environment will not trigger "monotony". However, when it is greater than or less than 4/km, the change rate would decrease.

Key words: grassland highway, long straight segment, information threshold, eye movement indices, driver

中图分类号:

X912

商艳, 朱守林, 戚春华. 草原公路长直线段最佳信息量阈值研究[J]. 中国安全科学学报, 2021, 31(6): 189-195.

SHANG Yan, ZHU Shoulin, QI Chunhua. Research on optimal information threshold of long straight section on grassland highway[J]. China Safety Science Journal, 2021, 31(6): 189-195.

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