基于at89c52单片机超声波测距仪的设计毕业论文

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1、基于AT89C52单片机超声波测距仪的设计BASEDONAT89C51ULTRASONICRANGEFINDERDESIGN学生姓名学院名称专业名称指导教师目录摘要···········································11绪论············································31.1课题研究的背景··································31.2课题提出及研究的意义····························41.2.1课题的提出······

2、·····························41.2.2课题的研究意义·······························42超声波的介绍和超声波的测距原理··················42.1超声波的介绍····································42.1.1什么是超声波········································42.1.1超声波的特性及特点··································42.1.3超声波的应用··········

3、······························52.2超声波测距的原理及误差分析······················52.2.1超声波的测距原理····································52.2.2超声波的误差分析····································62.3单片机实现测距原理····································73系统硬件设计····································73.1系统结构设计·····

4、·······························73.2单片机AT89C52最小系统··························83.2.1单片机的功能········································83.2.2主要性能参数········································93.2.3AT89C52的管脚说明··································93.3DS18B20温度传感器简介··························11

5、3.4T40R40超声波传感器简介························113.4.1超声波传感器的基本介绍······························113.4.2超声波传感器的基本原理······························123.5LM7805稳压集成电路·····························123.5.1LM7805介绍·········································123.5.2LM7805特点·······················

6、···················123.5.3LM7805实际应用······································123.6LM567锁相环····································133.6.1LM567概述···········································133.6.2LM567功能叙述······································133.6.3LM567主要参数···························

7、···········133.7超声波发射器电路································143.8超声波检测接受电路······························153.9显示电路········································153.10LM7805电平转换电路····························163.11AT89C52复位电路·······························164系统软件设计·························

8、···········174.1子程序设计······································17