全天候车载驾驶员监控系统相机设计  

Design of camera of all-weather vehicle driver monitoring system

作　　者：张宝龙[1] 杜康熙 刘小凡 梅志远 李丹[1] Zhang Baolong;Du Kangxi;Liu Xiaofan;Mei Zhiyuan;Li Dan(College of Electronic Information and Automation,Tianjin University of Science and Technology,Tianjin 300222,China)

机构地区：[1]天津科技大学电子信息与自动化学院,天津300222

出　　处：《电子测量与仪器学报》2021年第6期109-116,共8页Journal of Electronic Measurement and Instrumentation

基　　金：天津市科技成果转化接力支持项目(18YFJLCG00070)资助。

摘　　要：为了监控驾驶员的异常驾驶行为,提升驾驶的安全性,设计了一款全天候车载驾驶员监控系统相机。对该相机涉及的RGB-IR CMOS图像传感器、双通道带通滤光片镜头、硬件电路及主动式红外照明等方面进行了研究。首先分析了RGB-IR CMOS图像传感器红外增强特性;其次根据应用场景及适配的图像传感器确定了镜头的设计参数,完成了镜头光学结构设计与优化,并选取了合适的双通道带通滤光片;接着完成了相机硬件电路的整体设计;最后评测了该相机的彩色、红外成像性能及图像在算法中的有效性。实验结果表明,该相机可以实现日间高清彩色成像和夜间高清红外成像,符合车规级性能标准,图像能实现10~15 m长距离传输,另外相机还具有成本低、稳定性高等优势。A camera of all-weather vehicle driver monitoring system is designed to detect the driver′s abnormal driving behavior and improve driving safety.The RGB-IR CMOS image sensor,dual band-pass filter lens,hardware circuit,and active infrared lighting technology of the camera are studied in this work.Firstly,infrared enhancement characteristics of the RGB-IR CMOS image sensor are analyzed.Secondly,parameters of the lens are chosen to design according to the application scene and the suitable CMOS image sensor.The optical structure of the lens is optimized and a dual band-pass filter is also selected.Thirdly,the overall design of the camera hardware circuit is completed.Finally,the imaging performance of the camera and the effectiveness of the algorithm are evaluated.The experimental results show that the camera can achieve daytime high-definition color imaging and high-definition infrared imaging at night.The camera can meet the standards of the vehicle specification level and the image can be transmitted over a long distance of 10~15 m.In addition,the camera also has the advantages of low cost and high stability.

关 键 词：驾驶员监控系统 RGB-IR CMOS图像传感器 双通道带通滤光片 主动式红外 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置] TN219[自动化与计算机技术—控制科学与工程]