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学位论文-—基于单片机的激光通信仪.doc
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学位论文-—基于单片机的激光通信仪.doc
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本 科 毕 业 论 文
(2013 届)
题 目
基于单片机的激光通信仪
学 院
专 业
光信息科学与技术
班 级
学 号
学生姓名
指导教师
完成日期
2013 年 5 月
摘 要
无线激光通信比起传统无线电通信有许多优势,尤其是在高数据速率。随着
信息时代不断发展,只靠电信号传输数据已经满足不了人类日益剧增的需求,而
光通信更大程度上能实现要求,比如光纤到户等等。本论文主要对单片机激光通
信系统的原理,单片机的应用等进行了分析;对 AD 转换,串口通信,激光收发
器,LED 灯送显,硬件制作和软件设计进行分析;对系统进行误差分析。
经过实验的证明,本论文设计的系统软件和硬件设计的很合理、实时性很好,
抗干扰的能力强。实验误差的显示表明,本设计在进行短距离的测量时误差比较
小,所以可以应用在简单的数据传送等方面。
关键词:PIC16F877A;激光;通信;LED 显示;AD 转换
ABSTRACT
Wireless laser communication has many advantages over traditional radio
communication especially in high data rate.With the faster and fater development of the
information age,the electrical pulse signal transmission data can not meet the demand of
the growing surge of mankind.In greater degree,optical communication can realize the
requirements,such as fiber to the home,and so on.The laser transceiver,ADC,master
synchronous serial port,LED data show the principle of wireless laser communication
system.The hardware,software design and production were discussed.
The research has led to the discovery that the software and hardware designing is
justified,the anti-disturbance competence is powerful and the real-time capability is
satis- factory.Experiments show that this error display design in short distance
measurement error is less,so it can be used in a simple data transter.
Keywords: PIC16F877A; Laser;Synchronous serial port; LED display;AD conversion
1. 绪 论...................................................................................................................................................1
1.1 课题背景 .............................................................................................................................................1
1.2 激光通信的特点优势,与应用.........................................................................................................1
1.3 国内外激光通信的现状 .....................................................................................................................2
2.激光通信系统分析 ....................................................................................................................................3
2.1 激光通信系统原理.............................................................................................................................3
2.1.1 激光传输 .........................................................................................................................................3
2.1.2 激光器..............................................................................................................................................4
2.1.3 调制与解调器 .................................................................................................................................4
2.1.4 光接收系统 ......................................................................................................................................5
2.1.5 大气传输技术 .................................................................................................................................5
3.激光通信系统的总体设计方案 ................................................................................................................6
3.1 激光通信系统的国内外研究现状 .....................................................................................................6
3.2 控制方法的确定.................................................................................................................................6
3.3 可靠性设计.........................................................................................................................................9
4. 激光通信控制电路的设计 ....................................................................................................................11
4.1 芯片的选择.......................................................................................................................................11
4.2 主要控制电路设计方案 ...................................................................................................................12
4.3 数据采集电路设计 ...........................................................................................................................12
4.4 激光接受与发射电路设计 ...............................................................................................................13
5.激光通信系统程序设计 ..........................................................................................................................15
5.1 编程语言的选择 ...............................................................................................................................15
5.2 主程序设计.......................................................................................................................................16
5.3 数据采集和处理程序设计...............................................................................................................18
6.结论和展望 ..............................................................................................................................................19
6.1 系统运行稳定性改进.......................................................................................................................19
6.2 结论...................................................................................................................................................19
1
致 谢 .........................................................................................................................................................20
参考文献 .....................................................................................................................................................21
附 录 .........................................................................................................................................................22
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