基于Zigbee技术的大功率LED路灯监控系统的设计与实现

发布时间：2018-03-25 15:32

本文选题：LED驱动电源　切入点：LLC谐振　出处：《华南理工大学》2014年硕士论文

【摘要】：LED作为一种新型绿色光源，具有节能、寿命长、方便监控等特点，已广泛应用在路灯上。LED路灯的智能化控制也成为研究热点，电力载波技术、Zigbee技术等都被应用于LED路灯的控制和管理中。电力线载波通过市电电线就可以传输数据，方便快捷，但也存在传送范围短、信号损失大、脉冲干扰严重等缺点，而Zigbee技术具有能耗低、成本低、易控制等特点，所以Zigbee和无线传感器网络技术成为了该领域的研究热点。本文首先从LED驱动电源的效率转换入手，因半桥LLC谐振变换器具有开关损耗低、效率高等优势，故选取其作为驱动电源的主电路。本论文深入研究了半桥LLC谐振变换器各个工作模态的原理，并对各工作模态进行了仿真验证。并结合有源功率因数校正技术，根据实际工程参数需求，设计了一款200W的LED路灯驱动电源。其次，以Zigbee技术为基础，设计了无线智能路灯监控系统。本文详细分析了Zigbee的组网技术和协议栈体系结构，以TI公司的CC2530为核心，设计了电流、温度、光敏传感器电路，，并开发了相应的下位机与上位机，分别有PC端上位机和安卓端上位机。本文所研究的内容来源于校企合作项目：高可靠LED驱动电源关键技术的研究（D8114260）。最终对整个监控系统进行了稳定性与性能测试，驱动电源拥有92%的效率和0.96以上的PF值，实现了初级开关管的ZVS和次级整流二极管的ZCS，输出电流恒定，电压纹波极小；基于Zigbee技术的监控系统实现了电流、温度、光强的检测和PWM调光，其结果符合设计要求。
[Abstract]:As a new type of green light source, LED has the characteristics of energy saving, long life, convenient monitoring and so on. It has been widely used in the intelligent control of streetlights. Zigbee technology has been used in the control and management of LED street lamp. Power line carrier can transmit data through electric wire, which is convenient and fast, but it also has some disadvantages, such as short transmission range, large signal loss, serious pulse interference and so on. Zigbee technology has the characteristics of low energy consumption, low cost, easy to control, so Zigbee and wireless sensor network technology has become a research hotspot in this field. This paper starts with the efficiency conversion of LED drive power supply, because the half-bridge LLC resonant converter has the advantages of low switching loss and high efficiency. Therefore, it is chosen as the main circuit of driving power supply. In this paper, the principle of each mode of half-bridge LLC resonant converter is deeply studied, and the simulation of each mode is carried out, and the active power factor correction technology is combined. According to the requirements of practical engineering parameters, a 200 W LED street lamp driving power supply is designed. Secondly, based on the Zigbee technology, the wireless intelligent street lamp monitoring system is designed. The network technology and protocol stack architecture of Zigbee are analyzed in detail. The current, temperature and Guang Min sensor circuits are designed with TI's CC2530 as the core. The corresponding lower computer and upper computer are developed, including PC and Android respectively. The content of this paper comes from the cooperation project of school and enterprise: the key technology of high reliability LED driver power supply D8114260. Finally, the stability and performance of the whole monitoring system are tested. The driving power supply has 92% efficiency and 0.96 PF value. The ZVS of the primary switch and the secondary rectifier diode are realized, the output current is constant and the voltage ripple is very small. The monitoring system based on Zigbee technology realizes the detection of current, temperature and intensity of light and the dimming of PWM, and the results meet the design requirements.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM923.5;TP277

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