基于STC89C52的汽车倒车辅助系统设计与实现  

Design and Implementation of Car Reversing Assist System Based on STC89C52

作　　者：徐恒 毛亚珍 XU Heng;MAO Ya-zhen(Hunan Industry Polytechnic,Changsha Hunan 410006;Yizhang Branch,China Telecom Co.,Ltd.,Chenzhou Hunan 424200)

机构地区：[1]湖南工业职业技术学院,湖南长沙410006 [2]中国电信股份有限公司宜章分公司,湖南郴州424200

出　　处：《长沙航空职业技术学院学报》2022年第2期13-16,共4页Journal of Changsha Aeronautical Vocational and Technical College

摘　　要：针对汽车倒车过程中很难判断车尾与障碍物距离而导致剐蹭的问题,设计了一种基于STC89C52的汽车倒车辅助系统。该系统的核心是采用HC-SR04发射、接收超声波信号,记录超声波从发射到接收的时间,然后利用DS18B20实时测量温度进行速度校正,从而准确地计算出车尾与障碍物的距离,再将距离值实时显示给驾驶员。当距离值小于系统设置的预警阈值时,蜂鸣器发出警报提醒。详细介绍了该系统硬件电路和软件程序设计过程,最后进行实物焊接调试,调试结果表明该系统可以有效控制汽车倒车距离,具有设计合理、精确度高、实时性好等特点。Aiming at the problem of scratching due to the difficulty in judging the distance between the rear of the car and the obstacle during the reversing process of the car,this paper designs a car reversing assistance system based on STC89C52.HC-SR04 is used to transmit and receive ultrasonic signals,record the time from transmitting to receiving ultrasonic waves,and then uses DS18B20 to measure temperature in real time for speed correction,so as to accurately calculate the distance between vehicles and obstacles.When the distance value is less than the warning threshold set by the system,the buzzer will give an alarm.The paper introduces the design process of the hardware circuit and software program of the system in detail,and finally through the physical welding debugging,the debugging results show that the system can effectively control the safety distance of the car reversing,and has the characteristics of reasonable design,high accuracy and good real-time performance.

关 键 词：STC89C52 超声波 温度补偿 汽车倒车 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]