功率型LED光通量的反馈控制系统设计  

Feedback Control System Design of the Power LED Luminous Flux

作　　者：谢一菁[1] 

机构地区：[1]漳州职业技术学院电子工程系,福建漳州363000

出　　处：《泉州师范学院学报》2016年第2期68-72,共5页Journal of Quanzhou Normal University

摘　　要：为实现LED光通量的反馈控制系统,采用以STM32F103C8T6单片机为核心的最小系统、电源模块、LED驱动控制电路模块、光强度检测模块组成系统.该系统是以PT4115作为驱动模块,输出电流恒定来驱动功率型LED.并采用两个相同的驱动模块,同时用频率相同占空比不同可独立调节的PWM来控制白光LED与黄光LED发光.采用BH1750FVI光强度测试模块检测LED发光量及在LCD12864液晶屏上显示,并反馈到单片机系统,从而控制并调整PWM占空比以实现人机交互.To achieve LED luminous flux feedback control system, this project adopts the STM32F103CST6 single-chip microcomputer as the core of minimum system module,power module, LED the drive control circuit,light intensity detection module. As PT4115 drive module of the sys- tem,the output current constant power type LED to drive. Using two identical driver module, at the same time,different compared with the same frequency can be adjusted independently of PWM to con- trol the white LED with yellow LED. Using BH1750FVI light intensity test module testing LED quantity and in LCD12864 LCD screen display,and feedback to the single-chip microcomputer system, so as to control and adjust the PWM duty cycle to achieve human-computer interaction.

关 键 词：功率型LED 光通量 反馈控制 控制系统 

分 类 号：TH741[机械工程—光学工程]