基于连续小波变换的Hilbert包络线松动部件定位方法  

Hilbert Envelope Loose Part Location Method Based on Continuous Wavelet Transform

作　　者：季田田 方力先[1] 曾复[1] 张卫[1] 谢永诚[2] 王赤虎[2] 张可丰[2] 

机构地区：[1]杭州电子科技大学,浙江杭州310018 [2]上海核工程研究设计院,上海200233

出　　处：《原子能科学技术》2014年第6期1087-1095,共9页Atomic Energy Science and Technology

基　　金：科技部国家科技重大专项资助项目(2010ZX06001-001);2012年浙江省公益性技术应用研究项目资助(2012C23017)

摘　　要：本文结合时-频域信号处理方法,在对冲击信号进行连续小波变换(CWT)的基础上,采用计算信号Hilbert包络线极大值的方法确定冲击信号的到达时间,并应用于网格定位。研究结果表明,该方法具有较高的定位精度,对小质量的松动部件能准确地定位其位置,且具有较好的抗噪能力。In this paper ,combined with time-frequency analysis ,the impact signal arri-val time was determined by the method of calculating the Hilbert envelope maximum based on the analysis of impact signal by continuous wavelet transform （CWT ） ,and it was applied to grid localization The results show that this method has strong anti-interference capacity and high locating accuracy ,and for the small mass loose parts it also can accurately locate their position .

关 键 词：核电站 松动部件 定位 连续小波变换 希尔伯特变换 

分 类 号：TL363[核科学技术—核技术及应用]