摘要：随着卫星通信技术的发展，移动卫星通信已经成为一种机动性良好的通信手段，可以用于汽车、飞机、火车、地铁、舰船等各种移动交通载体上，有着很强的市场潜力和应用前景。移动卫星通信的关键在于天线稳定准确的自动跟踪电路。现在我们通常能在公交车，出租车，地铁等公共交通设施以及一些豪华的私人汽车上看到这些车载卫星电视。但当车到无线信号覆盖不了的野外地区时，或者是在高速行驶的车辆上，却不能和外界保持顺畅的联系，无法实时地观看精彩的电视节目。为解决这一难题，我们要对交通天线跟踪系统进行研究。本文主要通过AT89C51单片机作为核心，并应用常用的GPS模块、数字电子罗盘模块、陀螺仪传感器、步进电机以及LCD显示器来对电路进行设计，介绍了如何计算卫星的俯仰角和航向角。最后，对天线搜索卫星进行了仿真。21502
毕业论文关键词： AT89C51；GPS；电子罗盘；步进电机；自动跟踪
The traffic antenna automatic tracking circuit design based on C51
Abstract:With the development of satellite communication technology, mobile satellite communication has become a good means of communication, mobility can be used in cars, planes, trains, subways, ships and other mobile transport carrier,which has strong market potential and application prospect.Mobile satellite communication is the key to the stable and accurate of antenna automatic tracking circuit.Now we can often see the satellite TV in buses, taxis, subway and other public transport facilities and some luxurious private car .But when the car to the wireless signal coverage of wilderness areas, or on the high-speed vehicle, it can't keep smooth contact with the outside and not in real time to watch wonderful TV program.To solve this problem, we need to study of traffic antenna tracking system.This paper mainly through the AT89C51 as the core, and application of commonly used GPS module, digital compass module, a gyroscope sensor, stepper motor, and LCD monitor to the circuit design,also introduce how to calculate the elevation Angle and heading Angle of satellite.Finally, simulate the antenna search satellite .
Keywords: AT89C51; GPS; digital compass; stepper motor; automatic tracking
目录
1 绪论 1
1.1 课题研究背景 1
1.2 国内外研究现状与水平 2
1.3 课题的基本内容 5
2 天线跟踪 7
2.1 天线的作用及分类 7
2.2 天线跟踪角度 9
2.2.1 坐标定义 9
2.2.2 坐标轴变换矩阵的计算 11
2.2.3 天线的航向角与俯仰角计算 12
2.3 天线跟踪技术 13
2.3.1 圆锥扫描跟踪 13
2.3.2 单脉冲跟踪 14
2.3.3 步进跟踪 15
2.3.4 总结与比较 16
3 电路的硬件设计 18
3.1 系统组成与工作原理 18
3.2 电路硬件设计 18
3.2.1 AT89C51单片机 19
3.2.2 GPS模块 23
3.2.3 电子罗盘模块 25
3.2.4 陀螺仪传感器模块 27
3.2.5 液晶显示模块 29
3.2.6 步进电机驱动模块 30
4 电路的软件设计 37
4.1 软件开发平台 37
4.1.1 Keil 37
4.1.2 Protel 99E 37
4.1.3 Protues 38
4.2 软件设计流程图 39
5 电路绘制及仿真 41
5.1 电路整体设计与绘制 41
5.2 基于PROTUES的仿真 41 基于C51的交通天线自动跟踪电路设计+电路图:http://www.youerw.com/tongxin/lunwen_13736.html