摘要
本文在数字摄像能见度自动观测仪的光源材质和LED光源特性分析的基础上,给出了LED光源电流反馈电路,并开展了稳定性和一致性测试测试。本实验的发光阵列由16×16高密度LED灯组构成,LED发光板被安装于灯箱内部,并在光源周边设置了反射镜,确保照射到周边的光重新被反射至发光区。对LED光源系统稳定性测试得到光源亮度平均值为11 306.42灰度级。对LED双光源实施了一致性测试,双光源亮度比的相对标准差在0.29%左右,符合一致性要求,光源亮度和温度表现为明显的正相关性,双光源亮度比保持稳定状态。
Based on the analysis of the light source material of digital camera visibility automatic observation instrument and the characteristics of LED light source,this paper presents the current feedback circuit of LED light source,and carries out the stability and consistency test.The luminous array of this experiment is composed of 16*16 high-density LED lamp groups.The LED emitting plate is installed inside the lamp box,and a reflector is set around the light source to ensure that the light irradiated to the surrounding area is reflected back to the luminous area.According to the stability test of LED light source system,the average brightness of the light source is 11 306.42 grayscale.The consistency test was carried out for the LED double light source.The relative standard deviation of the brightness ratio of the two light sources was about 0.29%,which met the consistency requirement.The brightness and temperature of the light source showed obvious positive correlation,and the brightness ratio of the two light sources remained stable.
作者
赵庭兵
曾曾
李强
ZHAO Ting-bing;ZENG Zeng;LI Qiang(Chongqing College of Humanities,Science&Technology,Chongqing,401524;Lhasa Municipal Party Committee Politics and Law Committee,Tibet Autonomous Region 850000;China Institute of Metrology,Beijing 100048)
出处
《环境技术》
2018年第5期101-104,共4页
Environmental Technology
