基于TDR多芯信号电缆故障测试装置的研制

摘要

This paper presents a multi-core cable test device based on the time domain reflectometry(TDR). A microcontroller of C8051F005 is used for controling CPLD to send pulse signal to the cable. With this design and dual joint measurement mode, the faults of cable shorted, mixed and the position of borken wires can be quickly detected and the presion of fault fixed-point position can be within 5 m. Because of the low cost and convenient operation ,the design will have good application prospects.%介绍一种基于时域脉冲反射(TDR)的多芯电缆故障测试装置.使用C8051F005单片机为处理核心,控制CPLD向电缆注入脉冲信号,通过双机联测的方式在电缆两端点同时进行测量,可快速判断电缆短接,混接以及芯线断线等故障以及故障点的位置,故障位置定点可精确到5 m以内,该装置设计成本低廉,操作方便,具有良好的应用前景.