基于眩光控制的公路隧道逆光角配置研究

Research on Backlight Angle Configuration of Highway Tunnel Based on Glare Control

逆光照明在公路隧道照明节能方面具有潜在的应用价值,其逆向光强出光能有效增益目标对比度,但同样增加了驾驶者的感光刺激。所以在提高其照明质量的同时,尽可能兼顾照明的安全性和舒适性就显得尤为重要。因此,研究采用试验与仿真的方法,在已有曲线基础上对逆光照明的最大光强角(光束角不变)进行空间配置,并分析其照明效能,为逆光照明的二次光学配光设计研究提供参考意义。研究表明:逆光照明光通量的增加对路面平均亮度的提升较为直接,计算工况中平均同比增长30%~50%,对TI眩光的影响幅度较小,同比增长4%~8%;隧道基本照明中逆向最大光强角超过36°时(光束角35°~50°),TI眩光可能超限;最大光强角每5°的调整,阈值增量的折减比是路面平均亮度折减比的1~2倍,即在一定角度范围内,通过调节主要光强角,控制阈值增量的收益是可观的。

Back lighting has potential application value in road tunnel lighting energy saving,its back light can effectively increase the target contrast,but also increases the driver's photosensitive stimulation.Therefore,while improving the lighting quality,it is particularly important to take into account the safety and comfort of lighting as much as possible.Therefore,the method of experiment and simulation are adopted to spatially configure the maximum light intensity angle(beam angle is unchanged)of counter-beam lighting on the basis of the existing curve,and its lighting efficiency is analyzed so as to provide reference for the secondary optical design of back lighting.The research shows that increase the luminous flux of back lighting can directly improve the average road surface luminance,with the average increase of 30%to 50%in the calculation conditions,the impact on TI glare is small,with an increase of 4%to 8%;when the maximum light intensity angle in the reverse direction exceeds 36°(beam angle 35°~50°),TI glare may exceed the limit;for every 5°adjustment of the maximum light intensity angle,the reduction ratio of the threshold increment is 1-2 times that of the average road surface luminance,that is,within a certain angle range,by adjusting the light intensity angle,the gain of controlling the threshold increment is substantial.