汽車倒車雷達

電子機電論文編號:JD215          字數:16330,頁數:51 

目   錄

第一章  緒論 1
1.1  課題研究的可行性 1
1.2  課題研究的意義和目的 1
1.3  課題研究的功能概述 2
1.4  課題研究的方案 2
第二章  系統的硬件設計 4
2.1 系統框圖 4
2.1.1 系統的主要電路 4
2.2   硬件電路設計 5
2.2.1 AT89C51單片機 5
2.2.2 LED數碼顯示模塊 8
2.2.3超聲波特點及測距原理 10
2.2.4超聲波發射和接收電路 11
2.3總體設計原理圖 18
第三章  系統軟件設計 19
3.1整體程序設計 19
3.2  基本功能模塊設計 19
3.2.1 LED數碼顯示模塊 22
3.2.2 外部中斷INT0、INT1處理模塊 23
3.2.3內部中斷T0、T1處理模塊 24
第四章 系統調試 26
4.1 硬件調試 26
4.2軟件調試 28
4.3系統測試 29
4.4誤差分析 30
第五章 總 結 33
結束語 34
致  謝 35
參考文獻 36
附錄1.硬件電路圖： 37
附錄2：程序清單 41

摘  要
隨著生活質量的提高，工作的需要，科技的發展，人們將越來越多的在生活中和工作中將汽車作為其日常的生活工具。給汽車安裝了倒車雷達系統，將使汽車安全性大大提高，以確保行車安全。
本系統是基于單片機控制的汽車倒車“雷達”系統，主要實現駕駛員在無法后視的情況下能夠通過系統的數字顯示，清楚車后障礙物的狀況，并通過報警信號避免撞車，在本系統的協助下安全的完成倒車。
本文主要內容如下：
1.系統的闡述倒車雷達的可行性和實現方法。
2.闡述了倒車“雷達”系統的系統組成。
3.詳細介紹其硬件電路構成，軟件設計和功能實現過程。
4.說明硬件電路和軟件電路的調試過程。
關鍵字：單片機 ；汽車； 超聲波 ；測距  
Abstract

In the condition of the life quality raise, necessaries of work, development of science and technology, more and more people will use automobile as their important tool in the living life and neutralization work .To fix a back car radar system in the motor vehicle will make car’s backward more secure. And will improve the security of driver.
This “radar” system is based on one-chip computer to control a automobile and to help a driver to backed a car . Below the situation that the main driver can’t see the afterwards of car, by means of the systematic LED digital display, the driver can see the distance between the car to the obstacle state. Moreover, it can avoid the collision of vehicles by the means of the alarm averts. And make backed a car secure complete by the systematic help.
The original chiefly act as the below substance:
1. The systematic elaborates backing car radar feasible quality and the realization means.
2. Elaborating what the systematic system is marked up.
3.Detailedly introducing such hardware electric circuit constitutes，software design and the process that how to really process.
4. Directions hardware electric circuit and software debug process.

Key words: MCU； Automobile ；Ultrasonic ；Distance- measurement