This paper introduces the design scheme and features of medical automatic doors, and elaborates the smallest single chip microcomputer, infrared detecting system, stepper motor drive system, door trip detecting system and fault detecting system. At the same time, this paper also introduces the actual application in various situations.%介绍了医用自动门的设计方案和特点，对单片机最小模块、红外检测模块、步进电机驱动模块、门行程检测模块和故障检测模块进行了详细的阐述，同时说明了实际应用中的各种情况。
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