基于HHT方法的露天矿爆破振动信号分析

Analysis on Blasting Vibration Signals of Open Pit Mine based on HHT Method

爆破振动信号处理是目前爆破振动研究领域里的一个重要课题。在某露天矿爆破振动监测的基础上,采用希尔伯特-黄变换(Hilbert-Huang transform,HHT)对爆破振动信号进行了分析处理,通过经验模态分解(EMD),将信号分解为包含不同成分的数个IMF分量,对各分量进行绘制信号的频谱、瞬时能量、等高线能量图等,得出波的时频特性及能量分布等特性。

The processing technology of blasting vibration signals has been an important subject in current blasting vibration study field. Based on the monitoring of blasting vibration of an open pit mine, blasting vibration signals were analyzed by using Hilbert-Huang transform （HHT）. Signals were decom- posed into several IMF components which contain different components through EMD, Hilbert transform was done on each component, then drew the graphics of signal spectra, instantaneous energy, contour energy and so on in order to get the characteristics of time-frequency and energy distribution of the vibration signals.