摘要
汽车倒车防撞预警系统可以有效降低汽车倒车时发生刮擦碰撞事故的几率。该系统以AT89S52微处理器为主控制器，采用HC—SR04超声波测距传感器实现倒车时后方空间的测距，在主控单元设计和测距模块设计的基础上，进行了数据通信电路设计，并设计了软件系统，最后进行了测试实验。经过实验数据分析，系统探测距离范围在2～400cm，测距精度达到3mm。结果表明：该系统测距范围较大，测距精度不会造成对汽车的损害，能够满足汽车在狭小空间内的倒车预警要求。
In order to reduce the car scraping collision accidents caused by bad ＂rear view＂ when reversing, a car reverse anti-collision warning system is designed. This system takes AT89S52 single chip as the main control unit, and it adopts the HC-SR04 ultrasonic ranging module to realize the non-contact distance measurement. On the ba- sis of matching the hardware, we designed the circuit and software, and carried out the test experiment, analyzed the ranging error. This system detection range can be 2 -400 cm, ranging accuracy is up to 3 ram, and it can sat- isfy the requirement of the early warning of a car when reversing in the narrow space.
出处
《机床与液压》
北大核心
2015年第6期32-37,共6页
Machine Tool & Hydraulics
基金
supported by Program for Liaoning Excellent Talents in University(No.LJQ2012058)
关键词
微控制器
报警防撞系统
超声波传感器
Microcontroller, Anti-collision warning system, Ultrasonic
