耐火材料声发射源信号的盲反卷恢复  

Blind Deconvolution of Refractory Acoustic Emission Source Signal

作　　者：雷哲[1] 王志刚[1] 刘昌明[1] 王涛[1] 

机构地区：[1]武汉科技大学冶金装备及控制教育部重点实验室,湖北武汉430081

出　　处：《机械设计与制造》2015年第6期91-94,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51405353;51475340);教育部新世纪人才支持计划资助项目(NCET-12-0715);湖北省自然科学基金(2014CFB825;2012FFA022)

摘　　要：声发射信号是表征材料内部损伤状态的重要指标。由于源信号无法直接获取,研究的通常是传播一段距离后已失真的信号,这对材料损伤状态的准确判断带来了影响。为了降低传播路径对声发射源信号的衰减和失真带来的不利影响,假设声发射信号在耐火材料的传递路径为线性系统,对传递通道的冲击响应函数进行了估计,并设计了反卷滤波器。与实验结果对比发现,该方法很好的辨识了传递通道未知的系统,并能一定程度地恢复声发射源信号,为材料损伤状态的准确判断提供参考。Acoustic emission signals is on important basis for characterizing the state of material internal damage, since the source signals con not directly obtain, so it is the signal after propagation distance generally distorted signals, which will affect the identification of the material damage state. In order to reduce the adverse effects of the propagation path of the acoustic emission source signal attenuation and distortion caused, it assumes that the propagation path is linear systems, and estimates the propagation path of impulse response function, designed blind deconvolution filter, which is found, this method is of very good identification of the unknown channel transfer system, and the AE source signal is to a certain degree of recovery, ond finally, it gives references to accurately determine the material damage state.

关 键 词：声发射源信号恢复 盲反卷积 冲击响应函数 耐火材料 

分 类 号：TH16[机械工程—机械制造及自动化]