干手器的设计与仿真。由红外感应模块、单片机模块和数码管显示模块三部分组成。本设计将红外感应信号引入51单片机，通过单片机控制从而触发继电器，启动烘手器。本报告详细阐述了此项目的基本设计思路和原理，并相应附有必要的原理图和模块电路。-Hand Design and Simulation. By the infrared sensor module, the microcontroller module and digital display module composed of three parts. The design of the infrared sensor signal into 51 single-chip, single-chip control by triggering the relay, start drying hands. This report describes in detail the basic design ideas and principles of this project, and accordingly with the necessary schematics and circuit modules.