基于时频反射的船舶电缆故障诊断方法研究  

Ship Cable Fault Diagnose Based on Time-Frequency Reflection

作　　者：蔡龙飞[1] 杨蕾[2] 

机构地区：[1]海军驻武汉四三八厂军事代表室,武汉430060 [2]武汉轻工业大学电气与电子工程学院,武汉430023

出　　处：《舰船电子工程》2014年第12期161-165,共5页Ship Electronic Engineering

摘　　要：论文针对基于时域反射的高技术船舶电缆故障诊断方法中,因反射信号微弱、信号衰减大而造成难以诊断的问题,采用时频反射法使该类故障信息更明显,提高高技术船舶电缆故障诊断检出率。另外,反射信号因受噪声信号干扰而导致电缆故障误报,利用小波系数收缩算法对反射信号进行降噪处理,可降低电缆故障诊断误报率。论文通过实验对时域反射法和时频反射法进行了比较,结果表明电缆故障诊断的检出率和误报率均有明显改善。Aiming at difficult diagnosis problem caused by weak reflected signal, big signal attenuation in high‐tech ships cable fault diagnosis method based on time domain reflection, time‐frequency diagnosis method is adopted to amplify the weak echo and improve hit rates. In addition, the threshold denoising method based on wavelet decomposition is studied to e‐liminate the interference of noise and reduce false alarm rates. Experiment is set to compare the time domain reflection and time‐frequency reflection, which shows that the proposed method can achieve higher hit rates and lower false alarm rates.

关 键 词：船舶电缆 故障诊断 时频反射 

分 类 号：TP206.3[自动化与计算机技术—检测技术与自动化装置]