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高速公路机电系统由监控、收费、通信三大系统构成,其中通信系统属于基础类设施,为收费、监控系统提供信息(话音、数据、图像)传输通道,而监控、收费系统也是由功能各异的计算机通讯网络构成。本文仅以京沪高速公路(河北段)为例,详细论述目前较为流行的高速公路机电系统构成和信息传输的特点。 通信系统网络及数据图像传输系统 京沪高速公路全路铺设20芯光缆,采用同步光纤数字传输系统(SDH STM-1)、
The highway electromechanical system consists of three systems of monitoring, charging and communication. The communication system belongs to the basic type of facilities and provides information (voice, data and image) transmission channels for charging and monitoring systems. The monitoring and toll collection system also has different functions The composition of the computer communication network. This article only takes the Beijing-Shanghai Expressway (Hebei section) as an example to discuss in detail the features of the electromechanical system composition and information transmission of the more popular expressways at present. Communication System Network and Data Image Transmission System The 20-core optical fiber cable is laid on the entire road of Beijing-Shanghai Expressway. Synchronous optical fiber digital transmission system (SDH STM-1)