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针对医院四线制呼叫系统存在着系统安装、维护困难和无线呼叫系统易受外界干扰的问题,设计了一种基于单片机的二线制呼叫系统。该系统采用有限状态机模型和“主机查询”方式,在保证了系统实时性的同时,有效解决了多个分机同时呼叫主机引起冲突的问题。经过临床应用,该系统有效解决了系统安装、维护困难和易受外界干扰的问题。系统实时性强、可靠性高、成本低、安装及使用方便,具有很强的实用价值。
For the hospital four-wire system, there is a problem of system installation and maintenance, and wireless call system is susceptible to external interference. A two-wire system based on single chip microcomputer is designed. The system uses the finite state machine model and the “host query” mode, while ensuring real-time system, effectively solve the problem of multiple extensions call host conflict at the same time. After clinical application, the system effectively solves the problems of system installation, maintenance and external interference. System real-time, high reliability, low cost, easy installation and use, with strong practical value.