MEASUREMENT SYSTEM AND METHOD FOR REFLECTION PROPERTIES OF WET ROAD SURFACES

摘要

This paper describes the measurement methodology and system architection of reflection properties of wet road surfaces in the description form of r-table as defined by CIE 66-1984. The aim of the measurement is to improve the accuracy of luminance simulation in the application of outdoor road lighting, specificly for the raining condition. A segmented measurement process was defined and applied in the measurement, which successfully solved the issue of rapid attenuation of "wetness" on the road surface that was measured. A new parameter, namely "drying time" is introduced to better reflect the dynamic change of reflection properties during and after the rain. The series of wet r-table with "drying time" as classified label would be considered as practical design basis for optimizing the lighting solutions for the raining condition.