文档介绍：【清华大学本科毕业设计】
车用倒车雷达设计
【摘要】
倒车雷达是汽车泊车或者倒车时的安全辅助装置,能以声音或者更为直观的显示告知驾驶员周围障碍物的情况,解除了驾驶员泊车、倒车和起动车辆时前后左右探视所引起的困扰,并帮助驾驶员扫除了视野死角和视线模糊的缺陷,提高驾驶的安全性。本设计利用ATMEL公司的AT89C51单片机、超声波传感器测距实现超声波倒车雷达。利用LED和发光二极管表示传感器探测范围内是否有障碍物,当在探测范围内有障碍物时,发光管以一定频率闪烁,闪烁的频率以距离定,距离越近频率越高。同时蜂鸣器提示报警,探测并指明障碍物距离。
【关键词】
倒车雷达,超声波,测距,报警,单片机
The designs of the vehicle back-draft radar using ultrasonic theory
【Abstract】
Back-draft radar is the safety and assistant devices when parking or reversing a vehicle, it can tell drivers circs about the around barrier with voice or a more intuitive display, release the surrounded visit puzzle from drivers when parking, reversing and start vehicles, and to help drivers clean off dead ends and the limitation of vision blur, improve the security of driving. Using Single Chip AT89C51 of ATMEL and Ultrasonic Sensor measure distance to achieve Ultrasonic Back-draft Radar. Using LED and LBD Sensor to detect whether there are barriers, when detecting barriers within the scope, the LBD will blink with a confirm frequency, the blink frequency of LBD is determined by the distance of barrier, the nearer distance and the higher frequencies. At the same time, The Voice Alarm warning, detecting the distance, and demonstrate the distance of barrier.
【Key Words】
Back-draft radar, ultrasonic, measure, warning, microprocessor
目录
第一章引言 1
1
1
第二章超声波介绍 4
4
4
5
6
7
超声波传感器的应用 7
第三章倒车雷达的原理与总体设计 9
9
10
11
AT89C51的简介 11
AT89C51的主要性能参数 11
AT89C51的结构 12
13
13
超声波接收模块元器件选择 13
第四章硬件设计 15
超声波发射模块 15
超声波接收模块 16
单片机最小系统 17
第五章软件设计 18
18
18
18
19
19
20
第六章调试 22
22
22
调试结果 25
25
第七章结束语 27
第八章致谢 28
参考文献 29
第一章引言
随着我国汽车产业的高速发展,尤其是近几年来,我国开始进入私家车时代,汽车的数量逐渐增