建筑材料表面红外双向反射分布函数实验分析

谢鸣¹, 黄勇², 王晓春¹, 赵欢欢¹, 谈和平¹

1.哈尔滨工业大学能源科学与工程学院;2.北京航空航天大学航空科学与工程学院



摘要:

为了深入研究建筑物表面红外反射分布特性和散射分布特性,选择建筑外饰面常用的3种典型材料(如花岗岩、铝板和镀膜玻璃),通过自行搭建双向反射分布函数(BRDF)实验台,利用聚四氟乙烯粉压制的标准白板(近似朗伯体)为单一参考试样,分别用0.632 8、1.340 0和3.390 0μm波段3种激光器,在不同的入射角度下,对各材料表面的BRDF分布进行了测量.结合其表面粗糙度并通过实验数据探讨了其表面反射特性与散射特性,指出了镀膜玻璃表面在近中红外区(入射波长为3.390 0μm)其表观上反射存在多峰值的现象,同时其BRDF分布值较0.632 8和1.340 0μm的有明显提高.该研究结果表明:不同入射波长时镀膜玻璃表面反射具有较大的差异性.

关键词:  双向反射分布函数  表面粗糙度  光散射  偏镜峰

DOI：10.11918/j.issn.0367-6234.2011.03.010

分类号:TU502

基金项目:国家自然科学基金资助项目(50606003)



Experimental analysis of the bidirectional reflectance distribution function(BRDF) of exterior finishing surface for typical building

XIE Ming¹, HUANG Yong², WANG Xiao-chun¹, ZHAO Huan-huan¹, TAN He-ping¹

1.School of Energy Science and Engineering,Harbin Institute of Technology,150001 Harbin,China;2.School of Avigation Science and Engineering,Beihang University,100191 Beijing,China)

Abstract:

Since the bidirectional reflectance distribution function(BRDF) could show well the infrared reflecting and scattering characteristics of exterior surface of buildings,three typical materials,granite,aluminum sheet and coated glass,which are often used on the exterior finishing surface of high-rise buildings,were chosen to be investigated.The BRDF distributions of these surfaces were measured by laser waves of 0.632 8 μm,1.340 0 μm and 3.390 0 μm respectively at different incidence angles,using the white standard plate(approximate Lambert Body)as a single sample,and the reflecting and scattering characteristics of these surfaces were analyzed.When the length of laser wave is 3.390 0 μm,there is a phenomenon of more peaks on the reflecting of coated glass’s surface and the values of these peaks are higher than that of 0.632 8 μm and 1.340 0 μm at the same time.It is shown that there is large diversity in the reflecting of coated glass’s surface with different incidence waves.

Key words:  bidirectional reflectance distribution function(BRDF)  surface roughness  light scattering  partial mirror peak