Design on Fault Online Detection Device of Thermal Test Low-Frequency Cable Based on M Sequence Correlation Algorithm

Abstract

The problem of low accuracy and low efficiency of off-line detecting on thermal test low-frequency cable faults could be solved by designing a cable fault detection system, based on FPGA export M sequence code(Linear feedback shift register sequence) as pulse signal source. This article has discussed the design principle of SSTDR (Spread spectrum time-domain reflectometry) reflection method, and hardware structure Figure. Testing data show that, experimental platform established by this detection system could adapt to faulty measurement of thermal test lowfrequency cable with different lengths and could meet on-line monitoring requirements.