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本文根据主控机、前置机和终端机构成的分布式微机自动报警系统,分析其中的通信系统。具体阐述了利用电力线传输报警信号的可行性,以及实现前置机与终端机之间双向通信的机理,并且还介绍了软、硬件相结合进行调制解调的方法和系统的自动复位技术。
In this paper, based on the main control computer, front-end machine and terminal into a distributed automatic alarm system, analysis of the communication system. Described in detail the feasibility of using the power line to transmit alarm signals, as well as the realization of two-way communication between the front-end machine and the terminal mechanism, and also introduced the combination of software and hardware for modem methods and system automatic reset technology.