This kind of intelligent car takes single chip microcomputer STC12C5A60S2 as the core, detects the black path on white paper by reflection type photodetector RPR - 220, drives follow predetermined way. The car is able to transfer its data of running status to computer via short distance wireless communication module NRF24L01, the computer runs software of human-machine interface made by VB to display driving conditions of the car, it also can control the car through operator' s voice command which recognized by Speech SDK5. 3 of Microsoft. The experiment result shows that the car works stably, takes the function of self-tracking and obstacle avoidance, the operator can remote control the car' s speed and direction.%智能小车以STC12C5A60S2单片机为控制核心,采用反射型光电探测器RPR - 220对白纸中的黑色路径进行探测,按照预定的路径行驶,小车运用短距离无线通信模块NRF24L01将行驶状况传输给计算机；计算机运行VB软件设计的人机交互接口软件显示小车行驶状况,它还可通过微软的Speech SDK5.3识别操作者发出的语音指令,对小车进行控制.实验结果表明小车工作稳定,能够自主寻迹与避障,操作者可以遥控小车的行驶速度与方向.
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