【摘要】 介绍了在红外系统中，采用步进电机作为扫描机构驱动元件，以Ｄ／Ａ数模转换器作细分方式的定频脉宽调制驱动方式，实现微机控制下的扫描机构步距均匀稳定，满足红外系统分辨率的要求更多还原

【Abstract】 By using the step motor as the driving component of the scanner and using D/A converter as the fine division mode of the fixing frequency pulse width modulation driving mode,the step of the scanner controlled by a microcomputer is stable and smooth.It also meets the resolution demands of the IR system.更多还原