基于单片机的倒车防撞预警系统设计和实现

Design and Realization of Car Reversing Anti-Collision Warning System Based on Single Chip Computer

汽车倒车防撞预警系统是汽车泊车辅助装置。系统由超声波发射与回波接收电路、超声波电信号放大电路、单片机控制电路、显示电路和声音报警电路组成,根据超声波测距原理,实现倒车防撞预警。给出了硬件各单元电路图,软件主要模块的流程图,说明设计过程和工作原理。采用通用型单片机作为控制电路,方便功能扩展,充分利用单片机的内部资源,外围元件少、电路简洁、成本低、实用性强。

Car reversing anti- collision warning system is the car parking auxiliary unit. The system is composed of ultrasonic transmitting and receiving circuit , ultrasonic electrical signal enlargement circuit, single chip computer control circuit, display circuit and sound alarming circuit. According to ultrasonic ranging principle, car reversing anti - collision warning is realizedred,the hardware various units circuit diagram are given, as well as the software main module flow chart. The design process and principle of work are analyzed in the paper. The system takes the general single chip computer as the control circuit, convenient function expansion. Fully using single chip computer＇s internal resources, the periphery part is few, the circuit is simple,low price and usable.