智能小车实现功能： 1.运用色标传感器对颜色进行识别 2.金属探测传感器识别金属物 3.超声波传感器测量距离 4.霍尔传感器实现小车速度测量 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-Intelligent vehicle functions: The car in the running process tracing requirements, design a AT89C51 microcontroller as the core contr