摘要
为满足医学光疗、医学检测上对LED光源高稳定性和高精度且需具有多种发光模式的需求,利用DDS技术,研制了一种多功能光源调制驱动器。以ARM stm32和FPGA作为控制器,控制恒流源提供恒流信号的方法,实现提供可分时切换的双频正弦、正弦、方波等多种模式驱动信号的功能。实验结果表明:不同功率的LED均能在各种驱动模式下正常发光,稳定性好,精度高,满足多功能光源驱动装置的要求。
A LED light source with different lighting modes,high stability and high precision is required in medical phototherapy and optical sensor domain.To meet this demand,we have developed a kind of multifunction LED driver by using DDS technology.ARM and FPGA were used to control the constant-current source to provide stable current signals in kinds of drive mode,such as time-switched dual-frequency sine wave,sine wave,pulse wave,etc.The experimental results indicated that LEDs with different power could work normally in all kinds of drive modes.Moreover,the light was stable and accurate.
出处
《电子设计工程》
2014年第9期54-56,共3页
Electronic Design Engineering
基金
国家自然科学基金项目(61178087)
国家级大学生创新创业训练计划项目(GCX12023)
