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利用一种新的单色LED光谱辐射模型建立大功率单色LED模拟仿真数据库;研究了通过多光谱叠加设计拟合日光光谱,确定了最佳的LED组合;在此基础上,系统分析了不同LED组合对日光光谱的拟合效果。结果表明,大功率单色LED已可以实现对日光光谱较好模拟,最佳组合包含23种不同种类LED,与日光光谱拟合相关指数达到82.06%。当组合中LED种类增加,对拟合相关指数无影响。当种类减少至16种时,相关指数缓慢减至79.97%,再进一步减少时,相关指数下降剧烈,选取的LED达到12种时,相关指数为45.27%。研究结果对实际选取LED种类模拟日光光谱,实现不同程度类日光照明具有指导意义。
A new monochromatic LED radiation spectrum model was established to simulate a high-power monochromatic LED database. The solar spectrum was fitted by multi-spectral superposition, and the best LED combination was determined. On this basis, Fitting Effect of LED Combination on Daylight Spectra. The results show that the high power monochromatic LED has been able to achieve a good simulation of the solar spectrum, the best combination of 23 kinds of different types of LED, and solar spectral fitting index reached 82.06%. When the combination of LED species increased, no effect on the fitting correlation index. When the species was reduced to 16 species, the relevant index slowed down to 79.97%. When further reduced, the index dropped drastically. When the selected LED reached 12 species, the relevant index was 45.27%. The results of this study are instructive for the actual selection of LED types to simulate sunlight spectrum and to achieve different levels of daylight illumination.