【正文】 ..................................................................................4 超聲波的傳播速度 ................................................................................................................4 超聲波對聲場產(chǎn)生的作用 ....................................................................................................4 超聲波傳感器 ................................................................................................................................5 超聲波測距系統(tǒng)原理 ....................................................................................................................5 測量與控制方法 .............................................................................................................................6 控制系統(tǒng)方框圖 ............................................................................................................................6第三章 單片機(jī)主機(jī)系統(tǒng)電路 .................................................................................................................8 單片機(jī)主電路 ................................................................................................................................8 復(fù)位電路 ........................................................................................................................................93. 3 時鐘電路 .......................................................................................................................................93. 4 按鍵電路 .....................................................................................................................................103. 5 蜂鳴器電路 .................................................................................................................................10第四章 系統(tǒng)主要硬件設(shè)計(jì) ...................................................................................................................12 方案論證與比較 ..........................................................................................................................12 超聲波發(fā)射電路: ..................................................................................................................12 超聲波接收電路 ...................................................................................................................13 最終方案確定 ..............................................................................................................................15第五章 系統(tǒng)的硬件結(jié)構(gòu)設(shè)計(jì) ...............................................................................................................17 單片機(jī)的功能特點(diǎn)及測距原理 ..................................................................................................17 單片機(jī)的功能特點(diǎn) ...............................................................................................................17 單片機(jī)實(shí)現(xiàn)測距原理 ...........................................................................................................17 超聲波發(fā)射電路 ..........................................................................................................................18 超聲波檢測接收電路 ..................................................................................................................18IV第 IV 頁 ISD1700 語言模塊 .......................................................................................................................19 接線說明 ...............................................................................................................................19 按鍵說明 ...............................................................................................................................19第六章 系統(tǒng)軟件設(shè)計(jì) ...........................................................................................................................21 系統(tǒng)程序的結(jié)構(gòu) .........................................................................................................................21 系統(tǒng)程序的流程 .........................................................................................................................21 ...........................................................................23第七章 總結(jié) .........................................................................................................................................24致謝 .........................................................................................................................................................25參考文獻(xiàn) .................................................................................................................................................26附錄 1 源程序 .............................................................