本系统采用80C51单片机为控制核心，利用超声波传感器检测道路上的障碍，控制电动小汽车的自动避障，快慢速行驶，以及自动停车，并可以自动记录时间、里程和速度，自动寻迹和寻光功能。整个系统的电路结构简单，可靠性能高。实验测试结果满足要求，本文着重介绍了该系统的硬件设计方法及测试结果分析。

采用的技术主要有：

（1） 通过编程来控制小车的速度；

（2） 传感器的有效应用；

（3） 新型显示芯片的采用

-Of the 80C51 single-chip microcomputer system for the control of the core, the use of ultrasonic sensors detect obstacles on the road to control the electric car' s automatic obstacle avoidance, fast slow moving, and automatically and can automatically record time, mileage and speed, automatic track finding and search light function. Circuit the whole system of simple structure, high reliability. Experimental test results meet the requirements, this article focuses on the system hardware design and analysis of test results. The main technology used: (1) through the program to control the speed of car　(2) the effective application of the sensor　(3) the adoption of the new graphics chips