智能通信电缆故障检测系统概要.doc

智能通信电缆故障检测系统设计 摘 要 通信电缆是指用于近距离音频通信和远距离高频载波数字通信及信号传输的电缆,广泛用于各个行业。由于各方面的原因,通信电缆容易发生短路、断线等故障。快速准确检测出通信电缆故障,减少故障历时,是一项非常重要的研究。为实现通信电缆网络在线管理与故障自动诊断,提高通信电缆的工作可靠性,减少电缆故障的人工排查工作量,提高通信电缆的自动化程度,本文设计并研制了基于同一硬件平台的多种故障检测方法相结合的通信电缆故障检测系统。由于单片机技术在应用上的日益成熟使其成为可能，该设计是以单片机AT89C51为控制核心，完成对通信电缆的工作状态进行检测。系统的主要功能包括：信号的检测、信号的调理、数据的传输以及人机通信接口技术的实现等。通过电缆检测电路、信号调理电路、多选开关电路和键盘显示电路实现了对多芯通信电缆的的工作状态的检测，确定其是否发生故障，并在发生故障时，对故障进行定点定位。该设计利用信号调理电路将检测到的信号传到单片机，并通过单片机的键盘显示电路实现智能控制电缆检测系统【1】 。 关键词：单片机；通信故障；检测 Intelligent Communication Cable Fault Detection System Abstract Communication Cable is used for audio communications and high-frequency carrier long-distance digital communications and signal transmission cables ,and widely used in all sectors. Due to various reasons, communication cables are susceptible to short-circuit, and other fault breaks. Rapid and accurate detection of communications cable fault, which reduce the fault, is a very important study. Communication cable network line management and automatic fault diagnosis can improve the reliability of signal cable, reduce the cable fault of the manual workload of the investigation, and improve the operation of the cables automation. This paper describes the design of the detection system whose hardware platform can achieve a variety of communication cable fault detection method. Because of the SCM technology in the application of the growing maturity becomes possible, this design is the core of the SCM AT89C51 for the control , which can complete the work of the communications cable state for testing .The main features include: signal detection, signal conditioning, data transmission and human-computer communication interface technology such as the realization. By cable detection circuit, signal processing circuit, multi-election switch circuit and the keyboard circuit display to achieve the multi-core communications cables of the state test to determine whether there has been a failure, and the fault designated location .The design of signal