摘要:随着人们生活水平的提高，日常的大型活动不断的增加。聚会、开会等一些活动的人数也在上升。中国是茶的故乡，在这些活动中品茶又是必不可少的事情。人数的增加，使得茶桌面积增大，使得泡茶者难以兼顾给每个人送茶，设计一种送茶工具来改善这一生活中存在的实际问题。

    本设计制作一款智能小车，来达到自能送茶的目的。本设计是一款以STC89C52单片机为核心控制器，用L293D驱动直流电机工作，控制小车的运行的红外线循迹、遥控小车。本款小车采用模块化设计，采用C语言软件来编写程序，以四个直流减速电机为驱动电机，通过传感器来采集信息，送入主控单元STC89C52单片机进行数据处理，处理后将数据传给驱动芯片L293D对直流减速电机进行驱动，完成相应的操作，来实现红外线遥控驾驶或自动寻迹驾驶等功能。

关键词：送茶小车；遥控；STC89C52；L293D；HD74HCO4P

ABSTRACT:With the improvement of living standards, the day-to-day large-scale activities continue to increase. Also on the rise in the number of gatherings, meetings and other activities. China is the birthplace of tea, tea is essential in these activities. Increase in the number, making the tea table area increases, making tea and difficult to take into account to each person Songcha design a Songcha tools to improve the practical problems in this life.

　　　Design a smart car, achieved can Songcha purposes. This design is a microcontroller to STC89C52 as the core controller, L293D drive DC motors, the operation of the infrared tracking control car, remote control car. The modular design of this subsection car to write a program using C language software, four DC gear motor for the drive motors, sensors to gather information and data processing into master unit STC89C52 MCU, after processing data to drive chip L293D DC gear motor drive, complete the appropriate action to achieve the infrared remote control to drive or to automatically find track driving.

Key words: Songcha car; Remote control; STC89C52; L293D; HD74HCO4P