摘要
在分析隧道洞外驾驶员适应亮度内涵的基础上,介绍了隧道洞外亮度L20的3种确定方法,查表法、环境简图法、黑度法,及等效光幕亮度L seq的确定方法,并对比分析以L20和L seq表达隧道洞外亮度的合理性,提出以等效光幕亮度L seq表达驾驶员驾车接近隧道时的适应亮度更为合理。考虑CIE推荐计算L seq的各环边界视角为近似值,提出用各环边界视角精确值计算等效光幕亮度L seq能进一步提高计算精度。
Based on the introduction of the concept of driver＇ s adaption luminance outside road tunnel, this paper introduced three determination methods of L20 and the determination methods of Lseq After studying the theoretical intension of these two parameters, the thesis argues that the equivalent veiling luminance Lseq can express the access zone luminance more accurately. It is more reasonable to determine the threshold zone lu- minance based on Lseq than on Lseq A polar diagram should be superimposed over the tunnel entrance image in the calculation of Lseq with the angular relationship of the polar diagram conventionally obtained with an ap- proximation calculation method. This paper proposed that that the calculation of Lseq should based on accurate angular relationship of the polar diazram.
出处
《灯与照明》
2013年第3期13-17,共5页
Light & Lighting
基金
国家自然科学基金资助项目(51278507
50908240)
关键词
隧道照明
适应亮度
洞外亮度
等效光幕亮度
tunnel lighting
adaption luminance
luminance outside tunnel
equivalent veiling luminance
