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

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 .