基于单片机的红外光通信系统设计(发射部分)毕业论文.doc

大连海事大学 毕 业 论 文 　 　　 二○一四年六月 基于单片机的红外光通信系统设计 （发射部分） 专业班级： 通信工程2班 姓 名： 赵晓明 指导教师： 谭克俊 信息科学技术学院 摘 要 红外通信技术是当今被广泛采用的短距离无线通信技术。本文在简单介绍红外协议基本原理的基础上，重点论述了采用STM32平台来实现一套红外通信系统发射部分的具体工作原理及实现方法。 本红外通信系统发射部分由前置模拟信号调理电路、STM32F103ZETT6片内AD设计的A/D转换部分、温度采集模块和红外发射驱动电路组成。前置模拟信号调理电路可将MIC、音乐和正弦波形3种模拟信号电压调节至0至3.3V，配合STM32平台的片内AD将3种模拟信号数字化。得到的数字信号发送至红外发射驱动电路，利用红外发光管，实现信号的定向传输。STM32平台的片内AD可达到较高的采样率，完成语音信号的高质量采样。在发送语音信号的同时，通过STM32平台上DHT11模块得到的温度信息可与语音信号采用信道时分复用的方式进行传输，每8秒传输一次温度信息。 本红外光通信装置发射部分实现了语音模拟信号与温度数字信号的发送，传输距离达到2m,配合中继转接部分可将信号完成90度变换，且接收端的语音无明显失真。 关键词：红外通信；STM32平台；AD采样率；时分复用 ABSTRACT Infrared communication technology is the short distance wireless communication technology is widely applied today. In this paper, on the basis of simple introduction to basic principle of infrared protocol, mainly discusses the STM32 platform to implement a set of infrared communication system is part of the working principle and implementation method. The infrared communication system launch part by the front analog signal conditioning circuit, STM32F103ZETT6 chip AD part design of the A/D conversion, temperature acquisition module and infrared emission of driving circuit. Front analog signal conditioning circuit to MIC, music and sine waveform three analog signal voltage regulation to 0 to 3.3 V, coordinates the STM32 platform on chip AD will be three kinds of digital analog signal. Get digital signal sent to the infrared emission of the drive circuit, using infrared light-emitting tube, realize the directional transmission of signals. STM32 platform on chip AD can achieve high sampling rate, to complete the high quality of the voice signal sampling. At the same time of sending voice signal, temperature information is obtained by STM32 platform DHT11 module can be used with voice signal channel of time-division multiplexing transmission in the form of information transmission every