毕业设计（论文）-太阳能LED路灯照明节能控制系统控制器设计精选.doc

摘要 随着太阳能照明技术的发展，近几年太阳能路灯行业发展迅速，规模不断扩大，并且随着新型节能LED灯具的出现，太阳能LED路灯以其节能性好的优势得到了广泛的推广。本文介绍了脉冲宽度调制技术PWM控制LED原理 关键词：LED恒流驱动；MSP430单片机； LED  Abstract With the development of solar lighting technology, in recent years the solar street lamp industry is developing rapidly, continues to expand the scale, and with the new energy-saving LED lamp, solar LED street lamps have been widely promoted for its good energy saving advantage. This paper introduces the principle of pulse width modulation technology PWM control the brightness of LED, designed a controller of MSP430F149 solar LED street lighting energy-saving control system based on. The controller includes hardware circuit design and software design of the hardware circuit, gives the hardware circuit of the controller schematics, design of the peripheral circuit of MCU, LED constant current drive circuit, sensor detection circuit, real-time clock circuit, keyboard and display circuit and power circuit. The software part of the adaptive brightness control algorithm flow chart and the C language source code, the algorithm according to the time, the brightness of the environment and personnel activities change the duty ratio of PWM signal, automatic adjustment of brightness of LED, make full use of the controllability of the LED, to achieve the best illumination control, to achieve the purpose of energy saving. Keywords: LED constant current drive; MSP430 microcontroller; LED lighting; PWM control; adaptive energy-saving control brightness. 目录 1 绪论 1 1.1课题的研究背景及意义 1 1.1.1 课题的背景 1 1.1.2 课题的意义 2 1.2 课题相关技术概述 3 1.2.1 太阳能LED路灯的优势 3 1.2.2 太阳能LED路灯的发展现状和前景 4 1.2.3 太阳能LED路灯控制器综述 4 1.2.4 太阳能LED路灯驱动器概述 4 1.3 本课题研究内容和论文组织结构 5 1.3.1 研究内容 5 1.3.2 论文的组织结构 5 2 系统总体方案设计 6 2.1 总体方案设计 6 2.2 PWM调光技术 7 3 硬件电路设计 8 3.1 MSP430F149单片机简介 8 3.1.1 MSP430F149单片机特点 8 3.1.2 MSP430F149单片机引脚简介 9 3.2 单片机外围电路 12 3.2.1 复位电路 12 3.2.2 单片机时钟电路设计 12 3.2.3 A/D转换器外部基准电压电路 13 3.2.4 MSP430单片机外围电路设计 14 3.3 LED恒流驱动电路 15 3.3.1 HV9910B功能特性及引脚简介 15 3.3.2 驱动电路参数计算 16