隧道环境下中间视觉模型的对比及应用

Comparison and Application of Mesopic Models under the Tunnel Environment

从视觉功效试验参数角度出发,分析USP、S、MOVE、MES2等中间视觉光度学模型计算结果的差异及成因,并讨论了各模型在隧道照明中的适用性。结果表明,在隧道中间段亮度水平范围内,四种中间视觉模型获得的亮度增益幅度为MOVE>MES2>S>USP。基于视觉功效的各中间视觉模型主要区别在于亮度适应系数x,有色差、高对比度和大偏心角的视觉任务会增大中间视觉函数Vm(λ)中暗视觉函数V'(λ)的权重;而无色差、低对比度和小偏心角的视觉任务会使得明视觉函数V(λ)的权重更大。隧道行车过程多为目标有色差、<5°偏心角和包含正负对比度的视觉任务,MOVE模型更适用于评价隧道中间段的人眼实际感受。

The present research analyzes the differences between the luminance calculated using the USP,S,MOVE,MES2model and its causes,as well as discusses the applicability of each model in tunnel lighting from the perspective of visual conditions.Results show that in the interior zone of the tunnel,luminance calculated by MOVE ranks the highest,followed by MES2and S model,and USP ranks the lowest.The major difference among visual performance based systems is adaptation coefficient x.Meanwhile,visual tasks with chromatic,high contrast and large eccentricity can enhance the weight of photopic function V(λ)in mesopic function Vm(λ);while visual tasks with achromatic,low contrast and small eccentricity can strengthen the weight of scotopic function V′(λ).The chromatic,eccentricity below5degrees,negative and positive contrast target is more frequently encountered in tunnel.Thus,MOVE model is more applicable to describe the actual vision in the tunnel driving environment.