基于模拟通道自环检测装置模型的研究

Research on Self-Loop Test Device Model Based on Analog Channel

远动模拟通道作为调度主站与厂站端全双工通信的桥梁,通道缺陷处理及时率是自动化运维的薄弱点。而为解决这一技术难题,本文研究了一套模拟通道“四线通道”自环检测装置,将该装置接入自动化主站端/站端调制解调器端子排内自环时可用于诊断模拟通道质量,快速定位通道故障位置,既可模拟主站服务器主动发送测试报文检测通道状态,又可以装置接入通道节点处收发短接实现通道自环功能,而且在正常运行情况下接入装置不影响通道正常收发。

Telecontrol analog channel is the bridge of full-duplex communication between the dispatching master station and the plant station terminal,and the timeliness of channel defect processing is the weak point of automatic operation and maintenance.In order to solve this technical problem,this paper studies a set of analog channel“four-wire channel”self-loop test device,which can be used to diagnose the quality of analog channel and quickly locate the channel fault when the device is connected to the self-loop in the terminal block of automatic master station terminal/station terminal modem.It can not only simulate the master station server to actively send test messages and test the channel status,but also realize the channel self-loop function by short-circuiting the transmitter and receiver at the device access to channel node,and the access device does not affect the normal transmission and reception of the channel under normal operation.