半透发光式与逆反射式指路标志视认效果对比分析  

Comparative analysis of the visual effects between the semi-transparent LED guide signs and the retro-reflective guide ones

作　　者：胡江碧[1] 陈丽[1] 孙淑娅 王荣华 HU Jiang-bi;CHEN Li;SUN Shu-ya;WANG Rong-hua(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《安全与环境学报》2020年第3期1013-1020,共8页Journal of Safety and Environment

基　　金：国家自然科学基金重点项目(61531005);贵州省交通运输厅科技项目(2015122038)。

摘　　要：为保证隧道内驾驶员对指路标志的安全视认,分析隧道照明光环境、标志特性对驾驶员视认距离的影响,营造了隧道中间段5种色温、3种亮度照明光环境,随机选取了20名小客车驾驶员进行半透发光式与逆反射式指路标志的视认试验。结果表明:隧道内半透发光式指路标志的视认距离明显优于逆反射式指路标志,且半透发光式指路标志的最佳字体照度范围为3 000~3 500 lx;在最佳的背景光环境条件下,半透发光式指路标志与字高53 cm,笔画在5画以下、5~10画及10画以上的逆反射式指路标志达到相同的视认效果时,字高分别缩减了35. 85%、30. 19%和24. 53%。半透发光式指路标志的应用可提高隧道内指路标志的视认距离,并能减少交通事故的发生,可为以后隧道内交通标志的改进与创新提供理论支撑。The paper has done an analysis of the factors influencing the visual performance of the guide signs,including the fonts features,the illuminance of the features,the background brightness and the color temperature,so as to ensure the recognition of the road-guide signs of the highway tunnels for the drivers. For the said purpose,we have designed the static visual recognition tests to determine the influence of the tunnel lighting environment and the luminous featured fonts on the drivers’ recognition distance. And,as a matter of fact,the middle section of the tunnel should also be installed with a lighting condition with5 kinds of color temperatures and 3 types of brightness,with the fonts of the semi-transparent LED guide sign as much as 7 types of illuminance. At the same time,20 health test standards of the drivers have to be chosen with the 4. 9 or more visual accuity.For the said purpose,we have to do a series of comparison recognition experiments between the semi-transparent LED guide sign and the retro-reflective guide sign under the different tunnel lighting environments. And,subsequently,it would be necessary to obtain the optimum light environmental parameters and the recognition distance of the 2 kinds of guide signs through the analysis of the experimental data measured by the tests. Thus,the results of the above testing comparison may prove that the brightness of the tunnel environment,the color temperature and illuminance of the fonts feature tend to be related actually to the driver’s recognition effect of the guide signs. Moreover,under the different background light conditions,the recognition effect of the semi-transparent LED guide sign proves to be noticeably better than that of the retro-reflective guide one. In addition,the front illuminance of the semi-transparent LED guide signs within the range from 3 000 lx to 3 500 lx tends to be of the optomostoc level for the drivers to recognize. Moreover,the recognition distance featured at a 53 cm height in the retro-reflective guide sign ought t

关 键 词：安全工程 隧道内照明光环境 逆反射式指路标志 半透发光式指路标志 字体照度 视认距离 

分 类 号：X951[环境科学与工程—安全科学]