【導(dǎo)讀】課題設(shè)計(jì)的背景和意義·····································1. 主要設(shè)計(jì)內(nèi)容和要求·······································1. 第2章系統(tǒng)總體設(shè)計(jì)方案·············································2. 第3章硬件電路設(shè)計(jì)·················································4. 單片機(jī)最小系統(tǒng)··········································4. 超聲波發(fā)射電路···········································6. 超聲波檢測接收電路·······································7