超声波雷达倒车系统设计

超声波雷达倒车系统设计 摘要：倒车雷达是针对日益拥挤的道路交通状况，以及在停车场、车库、街道等比较狭窄区域，避免车与车、车与人以及车与墙壁等障碍物发生碰撞、摩擦而出现的一种着眼于倒车防护的汽车防撞系统。 本文根据超声波雷达测距原理，研制一款基于超声波脉冲测距的倒车雷达系统。使它能在汽车缓慢倒车行驶时，识别出汽车尾部的障碍物，并能够测量障碍物与车体之间距离，在汽车发生碰撞事故前，对驾驶员发出声音提示和数码管显示数字提示。 完成系统的控制和信号的处理的使美国ATMEL公司的8位单片机AT89C51。并且，还采用了CX20106A红外线检波接收专用芯片。 在系统的软件设计过程中，采用了模块化设计思想，对程序的维护和升级变得简单易行。 本课题完成了基于超声波脉冲测距的倒车雷达的硬件设计、软件设计以及系统调试。 关键词：超声波，测距，倒车雷达，AT89C51，检波接收，CX20106A Design of ultrasonic wave back-draft radar system Abstract: The back-draft radar is aims at day by day the crowded road traffic condition ,as well as in the parking lot ,the garage ,the street and so on the quite narrow region ,avoids automobile and automobile and person as well as vehicle and wall has the collision ,one kind which the friction appears focuses to the back-draft protection automobile collision avoidance system. This article according to the ultrasonic wave radar ranging principle ,develops section based on the ultrasonic wave pulse range finder back-draft radar system .Enables it when the automobile slow back-draft travel, distinguishes the automobile rear part the obstacle ,and can survey between the obstacle and the chassis is away from ,has in front of the collision accident in the automobile ,sends out the voice prompt and the digital tube demonstration numeral prompt to the pilot. Completes the system the control and the signal processing is American ATMEL Corporation dish position monolithic integrated circuit AT89C51. And ,but also has used the Hua-bang company ISD pronunciation chip ,the realization voice prompt. In the system software design process ,has used the modular design thought ,changes simply to the procedure maintenance and the promotion ,is easy to realize. This topic has completed based on the ultrasonic wave pulse range finder back-draft radar hardware design , the software design as well as the system debugging. Key-word: Ultrasonic, Ranging, Back-draft radar, AT89C51, Voice prompt, CX20106A. ………………………目录…………………………… 摘要 2 Abstract 3 第一章 绪论 5 1