基于单片机倒车防撞报警系统设计论文

基于单片机原理的倒车防撞控制系统

【摘要】本文介绍了AT89S51单片机的性能及特点，设计了以其为核心的一种低成本、高精度、微型化、数字显示的汽车防撞报警器。该防撞报警器将单片机的实时控制及数据处理功能，与超声波的测距技术、传感器技术相结合，可检测汽车运行中后方障碍物与汽车的距离，通过数显装置显示距离，并由发声电路根据距离远近情况发出警告声。对防范汽车倒车事故的发生具有重要的意义。

【关键词】单片机;超声波;防撞;报警

【Abstract】This paper introduces the properties and the characteristics of AT89S51, designs a impact-proof alarm with low cost, high precision, miniaturization, digital display taking it as the core . The impact-proof alarm takes SCM’s real-time control and data processing functions combine with the Ultrasonic ranging technology,the sensor technologies. It is able to detecte the distance of rear obstacle and the automobile, through digital display device shows by sound circuit distance, and according to the distance situation warned. It has the vital significance to prevent automobile reverse accident.

【keywords】 Microcontroller; Ultrasonic; Impact-proof; Alarm

目录

引言 .................................................................................................................................................... 1系统设计的目标和任务..................................................................................................................

1.1系统设计的基本要求...........................................................................................................

1.2系统设计的思路...................................................................................................................

1.3方案论证...............................................................................................................................

1.3.1发送模块....................................................................................................................

1.3.2接收模块....................................................................................................................

2 AT89S51单片机与超声波雷达工作原理......................................................................................

2.1 AT89S51单片机的概述.......................................................................................................

2.2 AT89S51单片机的特点.......................................................................................................

2.3 超声波简介..........................................................................................................................

2.4超声波测距原理……...................................................

2.5超声波测距误差分析…

2.5.1 温度误差....................................................

2.5.2 时间误差…… ..................................................

2.6 影响超声波探测的因素…….............................................

2.7 如何提醒车主.........................................................

2.8 基于CX20106超声波测距的调试 ....................................................................................