道路照明中的亮度水平应属中间视觉范畴.而世界各国的现行道路照明标准均是在明视觉条件下确定的,这与中间视觉效果差别很大,由此带来的问题将造成照明质量的评价误差.为此,通过反应时间来研究中间视觉条件下的道路照明已成为该学科国际上的前沿研究课题.对此,文章介绍了采用自行研制的中间视觉反应时间测试系统进行光源光效的研究.该系统以不同光源形成中间视觉光环境,用变化的光斑模拟夜间行车道路前方可能出现的障碍物,并分别在不同背景亮度、视标对比度和视标偏心角的条件下,利用电子快门记录受测人员确认光斑的反应时间.通过对大量实测数据的回归分析,拟合出不同实验条件下反应时间与背景亮度的函数表达式,从而得出金卤光源视觉功效高于钠灯光源的结论.文中对测试系统的构造、工作原理、实验方法及数据处理结果进行了分析与讨论.该项研究成果对创建中间视觉条件下的可见度模型提供了实验依据,为中国道路照明工程的具体实施和实际改进有很好的借鉴意义.

Brightness level of the mad lighting should be of the mesopic vision category. But the present road lighting standard in the various countries is in the bright vision condition, this is different with the mesopic vision effect, which will bring the appraisal error into the illumination quality. Therefore, studies on the mesopic vision condition through the reaction time of the road lighting have been the front research topic. Regarding this, this article introduces the middle vision reaction time test system which independently develops to carry on the photosource light effect the research. This system can adopt different light sources to form the illumination environment under the mesopic vision, simulate road barrier ahead the car at night with varied light, and examine reaction time according to visual characteristic of driver through electronic shutter. Through regression analysis of the massive measured data, the reaction time and the background halogen brightness function expression has been fitted under the different experimental condition, thus obtains the golden photosource vision effect to be higher than the sodium lamp photosource the conclusion. In the article, the system the structure, the principle of work, the experimental technique and the data processing result has carried on the analysis and the discussion. This research results which is founded in the mesopic visual condition the visibility model provide the experimental basis, which has the very good model significance for China road lighting project concrete implementation and the actual improvement.

TU113.666

国家自然科学基金