LED阵列发光特性仿真和对比分析

发布时间：2018-12-16 23:30

【摘要】：LED正逐步替代传统卤素光源应用于机场助航灯,跑道警戒灯作为防止飞机入侵跑道的重要助航灯,针对其发光特性要求,提出对环形和方形LED阵列中心照度和发光角度研究。首先给出单LED光源在目标平面中心照度和发光角度的计算方法。其次在满足均匀排布的前提下,构造上述两种阵列,利用Matlab仿真在不同目标距离下对应的中心照度、发光角度及光斑半径的变化规律,并采用最小二乘法进行曲线拟合。最后通过光学软件TracePro进行追迹模拟仿真。结果表明:随目标距离的增大,两种阵列中心照度逐渐减小,光斑半径和发光角度逐渐增大,当目标距离小于8m时,两种阵列发光特性存在差异,环形阵列的中心照度较大,方形阵列发光角度较大,随着目标距离的增大,两种阵列的发光特性逐渐趋于一致。以4C级机场为例,分析得出上述两种阵列对A型警戒灯均适用,B型警戒灯适于采用方形阵列。
[Abstract]:LED is gradually replacing the traditional halogen light source for airport navigation light. Runway warning lamp is an important aid lamp to prevent aircraft from invading the runway. According to the requirements of luminescence characteristics, the central illumination and luminous angle of circular and square LED arrays are studied. First, the method of calculating the illuminance and luminescence angle of single LED light source in the target plane is presented. Secondly, under the premise of uniform arrangement, the above two kinds of arrays are constructed, and the variation law of center illumination, luminous angle and spot radius at different target distance are simulated by Matlab, and the curve fitting is carried out by least square method. Finally, the tracing simulation is carried out by the optical software TracePro. The results show that with the increase of the target distance, the central illumination of the two arrays gradually decreases, the radius of the spot and the luminous angle increase gradually. When the distance of the target is less than 8 m, the luminescence characteristics of the two arrays are different, and the central illumination of the ring array is larger. The luminescence angle of the square array is large, and the luminescence characteristics of the two arrays tend to be consistent with the increase of the target distance. Taking the 4C airport as an example, it is concluded that the above two kinds of arrays are suitable for both type A warning lights and the B type warning lights are suitable for using square arrays.
【作者单位】：中国民航大学电子信息与自动化学院;中国民航大学空中交通管理研究基地;
【基金】：国家重点研发计划(No.2015YFB0502401)~~
【分类号】：TM923.34

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