The intelligent vehicle system with automatic line identification function is designed for " Free-scale National Automatic Vehicle Competition for University Students". Freescale 16-bit single chip microcomputer MC9S12XS128 is designed as the controlling core of the system, and MOSFET is used to make the drive circuits. Cameras and image sampling modules with photoelectric sensors are used for the pattern recognition and the characteristics extract of black lines so as to pre-estimate the road information. The vehicle speed is real-time acquired through self-made speed sensors. The PID strategy is implemented to form speed-loop control. Experiments show that the system can identify the line precisely and control the stable running of the vehicle on the track.%针对“飞思卡尔全国大学生智能车竞赛”,设计能自动识别路线的智能车系统.该系统以飞思卡尔16位单片机MC9S12XS128作为控制核心,用MOSFET制作驱动电路；采用摄像头和带有光电传感器的图像采样模块进行模式识别,提取黑线特征,预判道路信息；通过自制的速度传感器实时获取小车速度,采用PID控制策略形成速度闭环控制.实验证明该系统能够精准地识别路线,控制小车在赛道上稳定运行.
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