说明：  本作品是以玩具小坦克为车体，以AT89S52单片机为主控芯片，配合直流电动机，黑白传感器、金属传感器、霍尔传感器,LCD液晶显示屏等器件构成多功能智能小车系统。该系统通过调节PWM输出可实现控制小车的前进、后退、转向、加速、减速等动作；可精准地完成小车沿黑色引导线的寻迹（断开引导线亦可）、检测铁片个数、平稳运送乒乓球、实时LCD显示行驶距离、时间和行车轨迹等功能。经过多次测试，小车的各项性能指标均已达到竞赛题目的要求（包括基本要求和发挥部分）。
(This work is based on a small toy tank body, to AT89S52 microcontroller as the master chip, with the DC motor, black and white sensor, metal sensors, Hall sensors, LCD liquid crystal display devices such as trolley system constitutes a multi-functional intelligent. The system can be realized by adjusting the PWM output control car forward, backward, steering, acceleration, deceleration and other movements can be done accurately guide the car along the black line tracing (guide wire can be disconnected), the detection number of iron tablets, a smooth delivery of table tennis, real-time LCD display travel distance, time and driving trajectory functions. After repeated tests, small car performance indexes have reached the title contest requirements (including the basic requirements and to play a part).)