摘要本設(shè)計是一種基于單片機(jī)控制的簡易自動尋跡小車系統(tǒng)，其研究意義涵蓋了工業(yè)、生活、勘探以及人類關(guān)注的探月工程。設(shè)計旨在設(shè)計出一款可以自主按照人類預(yù)設(shè)的軌跡行走（或者完全自主行走）并完成指定任務(wù)的小車。從設(shè)計的功能要求出發(fā)，設(shè)計包括小車機(jī)械構(gòu)成設(shè)計和控制系統(tǒng)的軟硬件設(shè)計。為了適應(yīng)復(fù)雜的地形我采用穩(wěn)定性比較高的四輪構(gòu)架式，用后輪驅(qū)動前輪換向的控制模式。控制系統(tǒng)以STC89C52為控制核心,用單片機(jī)產(chǎn)生PWM波，控制小車速度。利用紅外光電傳感器對路面黑色軌跡進(jìn)行檢測,并確定小車當(dāng)前的位置狀態(tài)，再將路面檢測信號反饋給單片機(jī)。單片機(jī)對采集到的信號予以分析判斷,及時控制驅(qū)動電機(jī)以調(diào)整小車轉(zhuǎn)向,從而使小車能夠沿著黑色軌跡自動行駛,實現(xiàn)小車自動尋跡的目的。關(guān)鍵詞：循跡小車，單片機(jī)，紅外傳感器ABSTRACTThedesignisasimplemicrocontroller-basedcontrolautomaticallytracingthecarsystem,anditssignificancecoverstheindustry,life,exploration,andhumanconcernlunarexploration.Thedesignaimstodesignacanofindependentwalkinginaccordancewiththetrajectoryofhumandefault(orcompletelyautonomouswalking)andtocompletethetasksassignedtothecar.Thedesignincludesthefunctionalrequirementsfromthedesignofcarmechanicaldesignandcontrolsystemhardwareandsoftwaredesign.Relativelyhighstabilityofthefourtrussesinordertoadapttothecomplexterrain,beforetherotationoftherear-wheeldrivecontrolmode.ControlsystemtocontrolthecoretoSTC89C52microcontrollerPWMwavetocontrolthecarspeed.Usinginfraredphotoelectricsensortodetecttheblacktrackontheroadandtodeterminethecurrentstatusofthecar,andthentheroaddetectionsignalisfedtothemicrocontroller.Microcontrollertobecollectedsignalanalysisandjudgment,andtimelycontrolofthedrivemotortoadjustthesteeringofthecar,sothatthecaristravelingalongtheblacktracktoachievethepurposeofthecaraut