隧道不同光线分布下的照明功能指标数值分析

Numerical Analysis of the Visual Function Index under Various Tunnel Light Distributions

在隧道照明中有三种光线分布形式可供选择,分别是逆光照明、对称照明、顺光照明。在光通量相同的前提下,三种光线分布形式在亮度、目标物可见度等方面具有不同的效能。文章以亮度、目标物可见度为视觉功能指标,采用数值分析的方法研究隧道内三种光线分布形式对路面亮度、目标物可见度的影响。研究结果表明:隧道逆光照明的综合效能最高,顺光照明次之,对称照明的综合效能较低,以隧道安全和低碳的角度来看,逆光照明是最优的光线分布形式。

In tunnel lighting,there are three light distribution forms,which are back lighting,symmetrical lighting and forward lighting.On the premise of the same luminous flux,the three light distribution forms have different efficiency in brightness,target visibility and so on.In this paper,taking the brightness and the visibility of the target object as the visual function indicators,the effects of three light distribution forms in the tunnel on the pavement brightness and the visibility of the target object are studied by means of numerical analysis.The results show that the comprehensive efficiency of tunnel back lighting is the highest,followed by forward lighting,and the comprehensive efficiency of symmetrical lighting is lower.From the perspective of tunnel safety and low carbon,back lighting is the best form of light distribution.