为研究山区公路设计参数对驾驶人动态视觉的影响,构建了驾驶行为多源参数采集平台,招募18名驾驶人,开展了山区公路环境下的实车驾驶试验.测量并记录了注视、扫视以及头部运动的相关参数,研究了直线长度、弯道半径等参数对驾驶人动态视觉搜索特性的影响机理.结果表明:直线距离越长,驾驶人视点分布越离散;直行行驶时的临界扫视幅度显著低于右转和左转,且弯道半径越小,临界扫视幅度越大,两者呈对数函数关系;转弯时的头部水平运动剧烈程度显著高于直行驾驶模式.研究成果为山区公路驾驶人视觉搜索可靠度评价提供了一个全新的理论视角与技术方案,具有较强的推广应用价值.%To study the effects of design parameters on drivers' visual search behavior on mountain roads ,a multisource parame-ter acquisition platform for driving behaviors was developed .18 drivers were recruited to take part in the naturalistic driving test under mountain road environments .Fixation ,saccade and head movement parameters were measured and recorded .The influence mechanism of straight line length and curve radius on drivers' visual search characteristics was further explored .Results showed that concentration degree of fixation points decline with longer straight lines .Critical saccade amplitude in straight driving was significantly lower than that of left turning and right turning ,and the value increases as the curve radius decreases ,showing loga-rithmic relationship .When driving along the curve ,the head horizontal movement intensity was remarkably higher than that of straight driving .Our research results provided a new theoretical perspective and technical solution for reliability evaluation of drivers' visual search modes on mountain roads ,which were worthy of wide application .
展开▼
