論文標(biāo)準(zhǔn)WORD格式排版 62頁

超聲波料位計(jì)的結(jié)構(gòu)和功能，并從課題背景、系統(tǒng)組成、工作原理、軟硬件設(shè)計(jì)、系統(tǒng)調(diào)試等方面加以論述。
論文首先從超聲波的產(chǎn)生和特性入手對超聲波料位計(jì)和超聲波測距技術(shù)進(jìn)行了闡述，并得出了本論文的主要研究內(nèi)容和研究的可行性分析。
然后通過對超聲波測距原理的理解和最近幾年來超聲波發(fā)射和接收電路的認(rèn)識重點(diǎn)進(jìn)行了51系列單片機(jī)的功能介紹和軟硬件方面的設(shè)計(jì)，對電路圖和流程圖做出了詳細(xì)的介紹和分析，還提出了一些關(guān)于系統(tǒng)調(diào)試方面的建議。
最后在結(jié)論中對整個(gè)設(shè)計(jì)過程進(jìn)行分析和總結(jié)，得出了一些成果，但發(fā)現(xiàn)了諸多設(shè)計(jì)上的問題，我會在以后的時(shí)間里將它解決。

關(guān)鍵詞：超聲波，單片機(jī)，測距技術(shù)

Abstract
This dissertation was detailedly introduced us and is designed the ultra-audible sound and anticipates composition and the meritorous service capacity calculateed ，Moreover through the task backdrop 、System is makeed up 、Work rule 、Software and hardware design 、The respects such as system debug and so on are expounded 。
Dissertation coming into being first of all through the ultra-audible sound with the property is begined with to anticipate the ultra-audible sound to calculate to elaborate with the ultrasonic ranging technique ，Moreover obtain the feasible quality analysis with researcies of main research substance of native dissertation 。
Afterwards knowledge by means of the ultra-audible sound of understanding to the ultrasonic ranging rule with nearer year fireing and the receiving electric circuit has stressly been carried on The function introductions of 51 serial Single-Chip Microcomputers and the software and hardware respect design ，Detailed introduction and analysis were make to circuit diagram and flow diagram ，Still propose some proposals on the system debug respect 。
Finally being living in the conclusion analyses and sums up to the entire design process ，Obtain some fruit ，Yet discover the problem on much designs ，After I be able to be living time in by it resolves 。

Keyword ：Ultra-audible sound ，Single-Chip Microcomputer ，ranging technique

目 錄
1 緒論.........................................................1
1．1 引言....................................................1
1．2 單片機(jī)簡介..............................................1
1．3 超聲波產(chǎn)生和特性........................................2
1．3．1 超聲波的定義.......................................2
1．3．2 聲波的波型.........................................2
1．3．3 超聲波的產(chǎn)生和特性.................................3
1．4 超聲波測距技術(shù)的發(fā)展現(xiàn)狀及應(yīng)用..........................4
1．4．1 超聲波測距的優(yōu)勢...................................4
1．4．2 超聲波測距的應(yīng)用...................................5
1．4．3 超聲波測距的發(fā)展現(xiàn)狀...............................6
1．5 本論文的主要研究內(nèi)容及可行性分析........................7
2 超聲波測距原理...............................................8
2．1 超聲波測距傳感器........................................8
2．1．1 超聲波測距傳感器的工作原理.........................8
2．1．2 超聲波測距傳感器的分類和選擇.......................8
2．1．3 超聲波測距傳感器的探測方式........................12
2．1．4 超聲波傳感器頻率的選擇............................13
2．2 超聲波測距原理.........................................13
2．2．1 常見的測距法......................................13
2．2．2 超聲波測距基本原理................................13
2．3 幾種常見的40kHZ超聲波發(fā)射和接收電路...................14
3 單片機(jī)基本單元結(jié)構(gòu)與操作原理................................21
3．1 定時(shí)器/計(jì)數(shù)器的基本結(jié)構(gòu)與操作方式......................21
3．1．1 定時(shí)器/計(jì)數(shù)器的基本組成...........................21
3．1．2 定時(shí)器/計(jì)數(shù)器的SFR...............................21
3．1．3 定時(shí)器/計(jì)數(shù)器的工作方式...........................23
3．2 中斷系統(tǒng)的基本原理與操作方式...........................25
3．2．1 中斷系統(tǒng)的基本組成................................25
3．2．2 中斷系統(tǒng)中的SFR..................................26
3．2．3 中斷系統(tǒng)的自主操作過程............................27
4 超聲波測距儀的軟硬件設(shè)計(jì)....................................29
4．1 超聲波測距儀的硬件系統(tǒng)設(shè)計(jì).............................29
4．1．1 超聲波發(fā)射電路....................................29
4．1．2 超聲波接收電路....................................31
4．1．3 單片機(jī)系統(tǒng)及顯示電路..............................33
4．2 超聲波測距儀的軟件設(shè)計(jì).................................35
4．2．1 主程序............................................35
4．2．2 超聲波發(fā)射子程序..................................36
4．2．3 超聲波接收中斷程序................................37
4．2．4 延時(shí)子程序........................................37
4．2．5 顯示子程序........................................38
4．2．6 距離計(jì)算子程序....................................38
4．2．7 調(diào)試及性能分析....................................39
4．3 結(jié)論...................................................40
總結(jié)..................