迷宫循迹小车，小车要在迷宫中走到终点，到终点后能够返回，并且是最短路径返回。其中迷宫中的引导线是黑线，识别传感器使用红外对管。

最关键的是返回程序的算法。一定要是最短路径返回。-Maze tracking the car, the car should come to the end of the maze to the end and be able to return, and is the shortest path to return. The guide wire in which the maze is a black line recognition sensor using infrared tube. The most critical is the algorithm to return to the program. Must be the shortest path to return.