针对小车在行驶过程中的寻迹要求,设计了以AT89C51单片机为核心的控制电路,采用模块化的设计方案,运用色标传感器、金属探测传感器、超声波传感器、霍尔传感器组成不同的检测电路,实现小车在行驶中轨迹、探测预埋金属铁片、躲避障碍物、测量车速等问题检测,并对设计的电路进行了理论分析和实际测试。结果表明,该智能小车具有很好的识别与检测的能力,具有定位精度、运行稳定可靠的特点。-Accordingtorequestofautoearchingtrackofelectromotioncarinthetravelprocess,thecontrolcircuitisdesignedbasedonAT89C51,theusingmodularthedesignproposal,thetestingcircuitsareresearchedbydifferentkindsofsensorforrunningtrack,earthedmetalpieces,eludingroadblockandspeedmeasureandhascarriedonthetheoreticalanalysisandtheactualtesttothedesignelectriccircuit.Theresultindicatedthat,thisintelligentcarhastheverygoodrecognitionandexaminationability,hasthepointingaccuracy,themovementstablereliable.