数字化LED光源控制器设计  

Design of the Digital LED Lighting Controller

作　　者：谢鹏程[1] 赖乙宗[1] 李迪[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《科学技术与工程》2012年第3期560-563,共4页Science Technology and Engineering

基　　金：国家863计划项目(2009AA4Z111);国家科技支撑计划基金项目(2007BAH13B06);中央高校基本科研项目(2011ZM0056)资助

摘　　要：为了提高机器视觉中照明系统的质量,获得优质稳定的图像,设计了一种基于USB通信协议的LED光源控制器。该控制器采用基于ARM Cortex-M3内核的STM32F107作为微控制器,应用PWM调光技术以避免模拟调光中的色偏现象,并实现了普通、频闪、外部触发三种照明模式。在机器视觉检测系统的应用表明该控制器不但能够降低成本,而且能够实现PWM数字化精确调光,改善所提取图像质量。In order to improve the quality of lighting system in machine vision and obtain stable image,the LED lighting controller based on USB protocol has been designed.The lighting controller uses the STM32F107 as microcontroller which is based on ARM Cortex-M3 core.PWM Dimming technology is applied in order to avoid the phenomenon of color cast in analog dimming.Three lighting modes have been designed,including normal mode,strobe mode and trigger mode.The application in machine vision shows that it could not only reduces the cost but also dims accurately and improves the quality of the image.

关 键 词：STM32 USB2.0协议 光源控制器 机器视觉 PWM调光 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]