钢丝绳断丝信号的空间域划分及在小波变换下的频域特征提取  

Demarcation in Space Domain for Local Flaw Signals of Wire Ropes and Feature Extraction in Frequency Domain Based on Wavelet Transform

作　　者：张东来[1] 徐殿国[1] 王炎[1] 

机构地区：[1]哈尔滨工业大学,哈尔滨150001

出　　处：《电子学报》2000年第7期59-62,共4页Acta Electronica Sinica

摘　　要：频域特征是钢丝绳损伤定量识别的一个重要特征 .文中对钢丝绳断丝信号进行了空间域划分和小波变换下的频域特征提取 ,并用小波网络进行断丝的定量识别 .实践结果表明 :该方法能够在频域上清楚地区分噪声和损伤信号 ,提高了钢丝绳断丝检测的能力 .In wire rope test,an important characteristic is to identify the features of wir e rope flaw signals in frequency domain.Based on wavelet transform techniques,a new demarcation method in space domain and a new frequency feature extractive me thod for local wire rope flaw signals are proposed in the paper.Furthermore,the types of wire rope flaws can also be identified by the wavelet network quantitat ively.The experimental results show that the proposed method can clearly distinc t the noise and flaws in wire rope flaw signals.Using proposed method in this pa per,the performance of wire rope flaw detective instrumentation can remarkably i mproved.

关 键 词：小波变换 特征提取 钢丝绳 断丝信号 

分 类 号：TH878[机械工程—仪器科学与技术]