小波变换在电缆故障精确定位中的应用

The Application of Wavelet Transform in Location Precision of Cable Fault Examination

将小波变换模极大值对检测信号奇异点的理论应用于检测脉冲反射信号,实现电缆故障的定性定位。重点分析了小波变换在强噪声中提取信号,再现信号突变点方面的优越性。仿真表明它能有效去噪、准确定位脉冲反射信号,有利于提高信道故障定位精度。

The modulus maximum of wavelet transform was used to detect the impulse reflectance signals. It re- alizes the cable fault determining of position. The paper mainly analyses the superiority in picking up signal from strong noise and reappearance of signal breakig points. Simulation shows that it can denoise efficiently and locate impulse reflectance signal exactly. It is helpful in cable fault examination of location precision.