基于CEEMDAN-交叉小波变换的爆破延时识别

Recognition of blasting delay time based on CEEMDAN-cross wavelet transform

为更加准确识别延时爆破实际的延时时间,引入一种基于CEEMDAN-交叉小波变换的识别方法。首先,通过CEEMDAN方法对爆破信号进行分解,并基于交叉小波变换识别选择振动信号优势分量;然后,将优势分量进行重构,利用希尔伯特变换求取信号幅值;最后,通过幅值包络图对延时爆破实际延时进行识别。计算结果表明,引入的方法有效地消除了爆破振动信号中的干扰项,可以更加准确的识别延时爆破实际时间,提高准确度。

In order to more accurately identify the actual delay time of the delay blasting,a recognition method based on CEEMDAN-cross wavelet transform is introduced.Firstly,the blasting signal is decomposed by CEEMDAN method,and the dominant component of the signal is identified based on cross wavelet transform.Then,the dominant component is reconstructed,and the signal amplitude is obtained by using Hilbert transform.Finally,the actual delay time of delay blasting is identified through amplitude envelope diagram.The calculation results show that the introduced method effectively eliminates interference terms in blasting vibration signals,and can more accurately identify the actual delay time of delay blasting and improving accuracy.