前照灯全屏幕照度检测系统改进设计  

Improvement of Illuminance Detecting System of the Headlamp Based on the Full Screen

作　　者：金晅宏[1] 戴曙光[1] 周春樵[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光电工程》2011年第10期120-126,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(51075280);上海市教育委员会重点学科(J50505)

摘　　要：为了对汽车前照灯照度进行检测来保证行车的安全,现在相关技术行业主要把全屏幕摄像测试法应用在流水生产线上。针对该检测方法占地面积较大,而且在中心基准点HV对准方面存在影响测量精度的问题,本文提出了在全屏幕测试法的基础上加以改进的设计方案。该方法根据菲涅尔透镜和球透镜的光学特性来对系统进行优化,采用光学软件LightTools进行整个系统的仿真来验证系统设计的正确性。实验结果表明,采用球透镜的改进系统在前照灯照度的测量精度方面优于菲涅尔透镜。由于系统占地面积小,而且球透镜的聚光特性也能很好的解决HV基点的对准问题,所以该系统具有很广泛的市场前景。Illuminance detecting of the headlamp has become an obligatory step to keep the traffic safety.Now the full screen video method is used in the production line of headlamps of most relevant industries.This article describes an improving design proposal based on the full screen video method to solve its large floor area and the alignment of its center reference point ＂HV＂ lowering system measuring precision problems.By analyzing the optical character of Fresnel Lenses and globe lens,an optical simulation software named ＂LightTools＂ is used to set up the whole system model.Laboratory result finally shows globe lens in the improved system is better than Fresnel Lenses in the aspect of improving system measuring precision.Besides,this system has a little floor area,and the assembling light property of globe lens can also easily regulate the center reference point ＂HV＂.In view of automobile market,this system must have a broad prospect.

关 键 词：照度 全屏幕摄像测试法 菲涅尔透镜 球透镜 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论] TN29[自动化与计算机技术—计算机科学与技术]