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LED阵列发光特性仿真和对比分析

Simulation and comparative analysis of LED arrays in light-emitting characteristics

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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8 m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

Traditional halogen light sources are being gradually replaced by LED for airfield navigation lights. The runway guard lights are important navigation lights to prevent the aircraft from invading the runway. The study of the ring and square LED array center illumination and luminous angle is proposed aiming at its requirements of the luminous characteristics. Firstly, the calculation method of center illumination and luminous angle of single LED light source at target plane is given. Secondly, the above two arrays are constructed in the premise of satisfying the uniform arrangement. The center illumination, the luminous angle and the spot radius of two arrays at different target distances are researched by Matlab, and the least square method is used to simulate the power function curve. Finally, the tracing simulation is performed through the software TracePro. The results show that with the increase of the target distance, the center illumination of the two arrays gradually decreases, the spot radius and the luminous angle of both gradually increase. When the target distance is less than 8 m, the luminous characteristics of the two arrays are different. The center illumination of ring array is slightly larger, and the luminous angle of square array is slightly larger. The luminous characteristics of the two arrays are gradually tending to consistency with the increase of the target distance. Taking the 4C class airport as an example, it is calculated that the above two arrays are applicable to A-type guard lights and square array is suitable for B-type guard lights.

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中图分类号:TN256

DOI:10.3788/yjyxs20173212.0961

所属栏目:材料科学

基金项目:国家重点研发计划(No.2015YFB0502401)

收稿日期:2017-08-06

修改稿日期:2017-09-21

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作者单位    点击查看

侯启真:中国民航大学 电子信息与自动化学院, 天津 300300
薛荣荣:中国民航大学 电子信息与自动化学院, 天津 300300
王洁宁:中国民航大学 空中交通管理研究基地, 天津 300300

联系人作者:侯启真(qzhhou@cauc.edu.cn)

备注:侯启真(1966-), 女, 天津人, 硕士, 副教授, 主要从事机场目视助航系统、机场运行与保障技术等方面的研究。

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引用该论文

HOU Qi-zhen,XUE Rong-rong,WANG Jie-ning. Simulation and comparative analysis of LED arrays in light-emitting characteristics[J]. Chinese Journal of Liquid Crystals and Displays, 2017, 32(12): 961-967

侯启真,薛荣荣,王洁宁. LED阵列发光特性仿真和对比分析[J]. 液晶与显示, 2017, 32(12): 961-967

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