LED光照度叠加特性分析

发布时间：2019-04-21 12:26

【摘要】：计算LED光源对视场内的照射强度是设计均匀性光源的基础,也是视觉检测系统获得高质量图像的关键要素之一.本文以实验结果分析为依据,研究LED光的照度叠加特性.建立了单个LED光照模型,给出了单个LED照射条件下视场内任一点的照度计算方法;基于建立的单个LED光照模型,研究出两同色LED光的叠加特性,并给出了两同色LED光照射时视场内任一点的照度计算方法;为验证该方法的有效性,对3个LED光进行叠加实验,并在视场内任意选取20个点.实验结果显示:1根据本文所提方法求得的灰度值与真实值间的总体偏差为1.085,说明两者一致性良好;2 3个LED光照度叠加可看成其中两个LED组合成一个LED,再与另一个LED进行照度叠加;同理,n个LED光照度叠加可看作是由单个LED两两叠加后,再进行重复的叠加计算.
[Abstract]:Calculating the intensity of LED light source to the field of view is the basis of designing uniform light source and one of the key elements of obtaining high-quality image by visual inspection system. Based on the analysis of experimental results, the illuminance superposition characteristics of LED light are studied in this paper. A single LED illumination model is established, and the illuminance calculation method of any point in the field of view under the condition of single LED irradiation is given. Based on the single LED illumination model, the superposition characteristics of the two-color LED light are studied, and the illuminance calculation method of any point in the field of view when the two-color LED light is irradiated by the two-color LED light is given. In order to verify the effectiveness of the method, three LED light superposition experiments were carried out, and 20 points were selected randomly in the field of view. The experimental results show that: (1) the total deviation between the gray value and the real value is 1.085 according to the method proposed in this paper, which indicates that the two methods are in good agreement; Twenty-three LED illuminance overlaps can be regarded as one LED, combined into one LED, and then superimposed with another LED; similarly, n LED illuminance overlaps can be regarded as two-fold superposition of a single LED and then repeated superposition calculation.
【作者单位】：汕头大学机械电子工程系;
【基金】：国家自然科学基金资助项目(51305247;51175315;61307124) 广东省自然科学基金资助项目(S2013010015788;2014A030313616)
【分类号】：TN312.8;TP391.41

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