【正文】 ..............................................................................9 80C51 單片機(jī)和 80C51 系列單片機(jī) ....................................................................9 80C51 的內(nèi)部結(jié)構(gòu) .............................................................................................11 80C51 的引腳功能描述 .......................................................................................13 80C51 電路設(shè)計(jì) ...........................................................................................................14 LCD1602 簡(jiǎn)介 ...........................................................................................................15 LCD1602 優(yōu)點(diǎn) ......................................................................................................15 液晶顯示簡(jiǎn)介 ..........................................................................................................16 1602 字符型 LCD 簡(jiǎn)介....................................................................................... 17 貴州大學(xué)本科畢業(yè)論文(設(shè)計(jì)) 第 I 頁 1602LCD 的基本參數(shù)及引腳功能 ....................................................................18 1602LCD 的指令說明及時(shí)序 ............................................................................19 1602LCD 的 RAM 地址映射及標(biāo)準(zhǔn)字庫表 .....................................................22 1602LCD 的一般初始化（復(fù)位）過程 ............................................................23 硬件原理圖 ...........................................................................................................24 AT89C52 單片機(jī)時(shí)鐘電路 ........................................................................................25 AT89C52 單片機(jī)復(fù)位電路 ........................................................................................26 電容三點(diǎn)式振蕩電路 ...................................................................................................26 USB 電源電路 ..............................................................................................................28第四章 軟件設(shè)計(jì) .....................................................................................................................30 I/O 口的分配 ................................................................................................................30 軟件設(shè)計(jì)流程圖 ...........................................................................................................30第五章 PCB 與實(shí)物制作 ........................................................................................................32 PROTEL99SE 介紹 ........................................................................................................32 電路圖的繪制 ................................................................................................................33 PCB 板的制作 ..............................................................................................................34 材料清單 .......................................................................................................................34 元器件的檢測(cè)與安裝 ...................................................................................................34設(shè)計(jì)總結(jié) ...................................................................................................................................39參考文獻(xiàn) ...................................................................................................................................40致謝 ...........................................................................................................................................41附錄 A 程序源代碼 .................................................................................................................42附錄 B 設(shè)計(jì)原理圖 .................................................................................................................47附錄 C 設(shè)計(jì) PCB圖 ..................................................................................................................48 貴州大學(xué)本科畢業(yè)論文(設(shè)計(jì)) 第 II 頁 數(shù)字式電感測(cè)量?jī)x設(shè)計(jì) 摘 要 本文介紹了簡(jiǎn)單的數(shù)字電感測(cè)量的工作原理，本文介紹了一種基于單片機(jī) 80c51的電感測(cè)量?jī)x器的設(shè)計(jì)。文章首先論述了設(shè)計(jì)數(shù)字電感測(cè)量?jī)x的意義及思路，然后分析和設(shè)計(jì)了系統(tǒng)硬件的各單元電路，其內(nèi)容包括：復(fù)位電路，電源電路、顯示電路、頻率產(chǎn)生電路、正旋波振蕩電路等，最后對(duì)系統(tǒng)的軟件進(jìn)行分析與設(shè)計(jì)。經(jīng)測(cè)試，系統(tǒng)實(shí)驗(yàn)功能完備，顯示清晰。關(guān)鍵詞：?jiǎn)纹瑱C(jī)，555 觸發(fā)器，lc 電容三點(diǎn)式，lcd1602 顯示器 貴州大學(xué)本科畢業(yè)論文(設(shè)計(jì)) 第 III 頁Design of digital inductance measuring instrument Abstract This paper introduces a simple working principle of digital inductance measurement, this paper introduces a design of inductance measuring instrument based on MCU 80c51. This paper first discusses the significance and the design ideas of digital inductance measuring instrument, then the analysis and design of each unit circuit of the hardware system, which includes: reset circuit, power supply circuit, display circuit, frequency generating circuit, sine wave oscillation circuit, finally carries on the analysis and design of the system software. The whole system to 80c51 SCM as the central control device, LCD1602 as a display, sine wave oscillation with 555 chip, using C language, keil software, Proteus pany simulation, auxiliary test plate. After the test, system test function is plete, clear display. Completed the design of inductance measurement and display, is a simple digital inductance measuring instrument.Keywords: SCM, 555 triggers, LC three point capacitance, LCD1602 display 貴州大學(xué)本科畢業(yè)論文(設(shè)計(jì)) 第 0 頁 第一章 前言 設(shè)計(jì)的背景和意義 目前，隨著電子工業(yè)的發(fā)展，電子元器件急劇增加，電子元器件的適用范圍也逐漸廣泛起來，在應(yīng)用中我們常常要測(cè)定電感的大小。 通常情況下，電路參數(shù)的數(shù)字化測(cè)量是把被測(cè)參數(shù)傳換成直流電壓或頻率后進(jìn)行測(cè)量。 由于測(cè)量電感方法多并具有一定的復(fù)雜性，所以本次設(shè)計(jì)是在參考 555 振蕩器基礎(chǔ)上擬定的一套自己的設(shè)計(jì)方案。 電感測(cè)試儀的發(fā)展歷史及研究現(xiàn)狀 當(dāng)今電子測(cè)試領(lǐng)域，電感的測(cè)量已經(jīng)在測(cè)量技術(shù)和產(chǎn)品研發(fā)中應(yīng)用的十分廣泛。電感測(cè)量可依據(jù)交流電橋法，這種測(cè)量方法雖然能較準(zhǔn)確的測(cè)量電感但交流電橋的平衡過程復(fù)雜，而且通過測(cè)量 Q值確定電感的方法誤差較大，所以電感的數(shù)字化測(cè)量常采用時(shí)間常數(shù)發(fā)和同步分離法。 中國本土測(cè)量?jī)x器設(shè)備發(fā)展的主要瓶頸。每當(dāng)提起中國測(cè)試儀器落后的原因，就會(huì)有許多不同的說法，諸如精度不高，外觀不好，可靠性差等。由于人們的傳統(tǒng)觀念的影響，在產(chǎn)