摘 要本文设计了一款基于 AT89C51 单片机的倒车雷达，它采纳 ATMEL 公司生产的AT89C51 单片机作为控制核心，片外结合 T/R-40-12 小型超声波传感器模块、LCD1602液晶显示器模块、报警模块、晶振电路模块以及复位电路等模块而构成本倒车雷达的硬件系统。当倒车雷达安装在汽车尾部时，通过系统上的超声波模块来采集使用者距离后方障碍物的距离，然后通过单片机对采集数据进行处理，当距离少于临界距离时，单片机将驱动蜂鸣器进行报警提示司机；当后方无障碍物时，倒车雷达处于待机模式。经过大量的实验测试，本倒车雷达性能稳定，携带便捷，能够做到随时随地地辅助司机倒车，从而预防事故的发生。不仅如此，它对单片机以及超声波技术的推广也具有一定的积极作用。关键词：倒车雷达，AT89C51，超声波模块 Abstract This paper designs a reversing radar based on AT89C51 MCU, which uses ATMEL the AT89C51 as the control core, the external binding T/R-40-12 small ultrasonic sensor module, LCD1602 liquid crystal display module, alarm module, crystal oscillator circuit module and complex circuit module and the cost of reversing radar hardware system structure. When reversing radar is installed in the rear of the vehicle, the distance of the obstacle is acquired by the ultrasonic module of the system, and the data is processed by the microcontroller. The microcontroller will drive the buzzer to alert the driver when the distance is less than the critical distance. After a large number of experimental tests, the performance of the reversing radar is stable, easy to carry, can be done anytime and anywhere to assist the driver to reverse, so as to prevent the occurrence of accidents. Not only that, it also has a certain positive effect on the promotion of SCM and ultrasonic.Keywords:Reversing Radar, AT89C51, Ultrasonic Module目 录一、 引言.......................................................................................................................1（一） 课...
