In order to further improve the highway changeable signs luminous uniformity,this study uses the LED distribution photometer to detect the average luminous intensity of the same batch of four different colours of single-grain LEDs,using the average,standard deviation,coefficient of variation and unevenness of the data calculation,based on the results of the calculations,analysis of the stability of the average luminous intensity of different colours of the LEDs and to further explore the average luminous intensity of the LEDs.Luminous intensity testing process and control measures.The results of the study show that:in the process of product quality control and acceptance testing of changeable signs,according to national standards should be strengthened in the same batch of single-grain LED testing,through the data analysis to evaluate the average luminous intensity of the same batch of LED dispersion and inhomogeneity,in order to ensure that the uniformity of light emitting changeable signs light-emitting units.
维普
万方数据