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《畢業(yè)設(shè)計(jì)（論文）-基于單片機(jī)的數(shù)控電流源的設(shè)計(jì)》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、摘要隨著電子技術(shù)的不斷進(jìn)步，對(duì)電子儀器的要求也不斷提高。電源作為電路的動(dòng)力源泉更是扮演著越來(lái)越重要的角色，不論是學(xué)校實(shí)驗(yàn)室還是維修中心都離不開實(shí)驗(yàn)電流源，然而傳統(tǒng)的電流源不論是在控制精度還是輸出特性上都無(wú)法滿足要求。隨著單片機(jī)技術(shù)的不斷發(fā)展和D/A，A/D技術(shù)的不斷成熟使得數(shù)控電源成為可能，數(shù)控電流源不論是在控制精度還是在可操作性上都有傳統(tǒng)電源無(wú)法比擬的優(yōu)勢(shì)。本文在參考傳統(tǒng)電流源以及普通數(shù)控電流源的基礎(chǔ)上，在充分考慮性價(jià)比的同時(shí)極大地提高了數(shù)控電流源的準(zhǔn)確性，通過(guò)軟件修正以后在使用普通元件的情況下數(shù)控電流源的性能也達(dá)到了比較
2、高的水平。關(guān)鍵字：高精度；DAC0832；D/A轉(zhuǎn)換；恒流源；軟件修正29AelectriccurrentsourceofmachinecontrolbasedOnsingle-chipmicrocomputerStudent:CUIlingteacher:CHENXiao-qinAbstract:Progressunremittinglytherequesttotheelectronicsinstrumenttechnicallytoalsoraisecontinuouslyalongwiththeelectronics,
3、thepowersupplyisthemotivesourceoftheelectriccircuittoplayamoreandmoreimportantrolemore,istheschoolalaboratorystillrepaircentersestoallcannotgetawayfromanexperimentpowersupplyinspiteof,howeverthetraditionalpowersupplyiscontrolaccuracyoroutputthetopsofthecharacterist
4、icinspiteofandcan'tsatisfyarequest.AlongwithsingleslicemachinetechnicalofdevelopcontinuouslywiththeD/A,theA/Distechnicalcontinuouslythematuritymakethenumbercontrolpowersupplytomakepossible,counttocontroltheelectriccurrentsourceandiscontrolaccuracyinspiteofstillonth
5、emaneuverabilityallthereistraditionalpowersupplycan'tcomparetoofadvantage.Thistextinmakingreferencetothefoundationthatthetraditionalelectriccurrentsourceandcommonnumbercontroltheelectriccurrentsource,atthefullconsiderationpricecompareofinthemeantimeraisedanumbertoc
6、ontroltheaccuracyoftheelectriccurrentsourcebiggest,passthesoftwarecorrectionhereafterwhileusethecircumstanceofthecommoncomponentthenumbercontrolstheelectriccurrentsourceofthefunctionalsocomestoahigherlevel.Keywords:Highaccuracy；DAC0832；D/Aconverter；Constant；current
7、resource29目次摘要IAbstractII1.緒論11.1.電流源簡(jiǎn)介11.2.數(shù)控電流源的必要性11.3.數(shù)控電流源的可行性12.數(shù)控電流源硬件系統(tǒng)總體設(shè)計(jì)22.1.傳統(tǒng)電流源的設(shè)計(jì)方案22.2.數(shù)控電流源方案22.3.數(shù)控電流源的方案比較32.4.電流源的軟件系統(tǒng)組成42.5.本系統(tǒng)的特點(diǎn)53.數(shù)控電流源硬件模塊設(shè)計(jì)63.1.電源模塊63.1.1.電源原理63.1.2.電源方案確定73.1.3.電源模塊具體電路83.1.4.電源模塊PCB設(shè)計(jì)83.1.5.顯示模塊83.2.D/A電路103.2.1.DAC0832
8、簡(jiǎn)介103.2.2.具體電路設(shè)計(jì)123.2.3.控制電壓產(chǎn)生電路133.3.電流輸出模塊143.3.1.具體電路圖153.3.2.電流輸出模塊Pcb圖163.4.主控部分163.4.1.AT89C52單片機(jī)系統(tǒng)及外圍電路163.4.2.單片機(jī)時(shí)鐘脈沖電路16293.4.3.復(fù)位電路163.
