分布式无线智能LED光照度调控系统

针对现代智能楼宇与基于物联网技术的LED光源调控应用需求,设计了一套分布式无线智能LED光照度调控系统。系统采用上下位机结构,以MSP430微处理器为分布式控制终端的主控单片机,根据控制终端内部预制的LED开启时间段和预期光照度参数,进行基于光照度反馈的分布式LED光源亮度PWM闭环调控,并通过无线通讯方式实现上位机对分布式多点LED调光控制终端的开关控制、预制参数调整和光照度状态监测。通过测试实验验证了系统设计的正确有效性。

Distributed wireless intelligent LED illumination dimmer system*

This paper presents a distributed intelligent LED illumination dimmer system based on wireless communication technology, which can meet to the needs of the modern intelligent building and networking-based light source control applications. The system consists of MSP430 microprocessor-based digital control terminals and PC-based host computer. According to the reference parameters of LED illumination and turn-on time saved inside the microprocessor, the digital control terminals carry out closed-loop PWM control algorithm to realize illumination adjustment of distributed LED light sources. By using wireless communication method, the host computer can control remote distributed LED terminals to execute several operations, including switching manipulation, reference parameters update, illumination condition monitoring. Test experimental results indicate that the proposed illumination dimmer system works reliably, and achieves required functions.