超声波测距仪的设计(毕业论文)

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1、目录摘要................................................................................................................................11绪论............................................................................................................................11.1研究背景及意义............................

2、......................................................................11.2超声波测距的国内外研究现状...........................................................................22.1超声波传感器.......................................................................................................32.1.1超声波发生器............

3、..............................................................................32.1.2压电式超声波发生器原理......................................................................32.2超声波测距仪的系统构成...................................................................................33.1方案论证............................

4、......................................................................................43.2整体设计方案......................................................................................................63.3超声波测距单片机控制系统..............................................................................63.4超声波

5、发射、接收电路....................................................................................103.5显示单元电路....................................................................................................123.5.1显示电路的数码管介绍.........................................................................123.5.2

6、显示电路.................................................................................................143.6供电电路.............................................................................................................143.7报警输出电路.....................................................................

7、................................154系统软件设计..........................................................................................................155调试......................................................