基于RS485总线的医院智能呼叫系统硬件设计

为提高医院的工作效率，保证病人及时得到医护人员的救助，设计了一种新型的医院智能呼叫系统。该系统以AT89C51单片机为控制核心、采用RS485总线进行通讯，实现病房与护理人员间的快速、准确地呼叫及响应功能。系统由护理主机、呼叫分机、RS485总线通讯声光报警及LED显示等组成。采用了主从分布式多机通讯，能同时监控多个病房的呼叫并进行分级处理，通过采用RS485总线通讯系统实现远距离、多对一的呼叫。

Hardware Design of Intelligence Calling System in Hospitals Based on RS485 Bus

In order to improve the work efficiency of hospitals and make patients get effective help in time, a new type of intelligence calling system is introduced in this article. This system takes the AT89C51 single chip computer as control core and RS485 as communication, and can realize the fast and accurate communication between the ward and the nurse. It is composed of nursing master computer, follow computer, RS485, the acousto-optic warning, LED and so on. It adopts primary/secondary distributive multi-computer communication, can simultaneously monitor and stage wisely treat multiple wards＇ call. By the use of RS-485, the system can communicate remotely and realize the calling function of manytoone.