单灯多显示LED智能铁路信号机的光学混色研究  

Research on Optical Color Mixing of Single Lamp Multi Display LED Intelligent Railway Signal

作　　者：贺清[1] 杜跃飞 赵康效 He Qing;Du Yuefei;Zhao Kangxiao(School of Automation&Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070

出　　处：《激光与光电子学进展》2022年第11期507-514,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51967010);甘肃省教育厅优秀研究生“创新之星”项目(2021CXZX601)。

摘　　要：针对我国现有铁路信号机存在的色衰以及色品坐标偏移的问题,提出了一种单灯多显示发光二极管(LED)混光智能信号机的设想。首先,根据格拉斯曼定律及国际照明委员会标准色度系统混光原理建立了RGB(Red,Green,Blue)三色混光调制系统。然后,建立了占空比与色品坐标、相关色温的函数关系,并采用脉冲宽度调制方式分别对RGB三通道中的月白色、黄色、紫色灯光进行调节。最后,完成了占空比可调的三通道混光调制系统的设计与构建,并结合相对光通量衰减数据进行了仿真及实验验证。结果表明,RGB三色光系统可精确设定各色灯光的相关色品坐标,实现不同情况下的色品调节,满足铁路信号显示的需求。Aiming at the problems of color fading and chromaticity coordinate deviation in the existing railway signal in China,an idea of single lamp multi display light emitting diode(LED)mixed light intelligent signal is proposed in this paper.First,according to Grassmann’s law and International Commission on illumination standard chromaticity system mixing principle,the RGB(Red,Green,Blue)threecolor mixing modulation system is established.Then,the functional relationship between duty cycle,chromaticity coordinates and related color temperature is established,and the RGB three channel moon white,yellow and purple lights are adjusted by pulse width modulation.Finally,the design and construction of three channel mixed light modulation system with adjustable duty cycle are completed,and the simulation and experimental verification are carried out combined with the relative luminous flux attenuation data.The results show that the RGB threecolor light system can accurately set the relevant chromaticity coordinates of each color light and realize the chromaticity adjustment under different conditions,so as to meet the needs of railway signal display.

关 键 词：视觉光学 铁路信号机 色品坐标 混光调制 脉冲宽度调制 

分 类 号：U284.1[交通运输工程—交通信息工程及控制]