基于超声波的倒车防撞报警系统设计

超声波倒车防撞报警系统又称为倒车雷达，是为了解决倒车过程发生的碰撞问题，提高驾驶员驾驶的安全而设计的。系统核心为超声波测距系统，由主控芯片、超声波发射电路、超声波接收电路和显示模块组成。系统以STC89C51单片机为主控芯片，以555定时器为超声波发射电路核心，CX20106A为超声波接收电路核心，以液晶LCD1602为显示模块核心，同时增加测温补偿模块和声光报警电路。此系统结构简单、成本低、易于控制。

Design of anti-collision reversing alarm system based on ultrasonic technology

An anti-collision reversing alarm system based on ultrasonic technology,also known as reversing radar,is designed in this paper to solve the problems of collision avoidance in parking,and improve the safety of driving.The core of the system is an ultrasonic ranging system which consists of a main control chip,an ultrasonic transmitting circuit,an ultrasonic receiving circuit and a display module.The sing-chip microcontroller STC89C51 is used as the main control chip.The ultrasonic transmitting circuit is based on 555 timer,the ultrasonic receiving circuit is based on CX20106A,and the display module is based on LCD1602.At the same time a temperature compensation module and a sound and light alarm circuit are given.The system has advantages of simple structure,low cost and easy control.