Time-frequency domain correlation method based on the synchrosqueezed wavelet transform for tunnel vibroseis and its application

IF 1.8 3区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Jiansen Wang, Jiangdong Meng, Borui Shao, Xiangnan Ding, Xinji Xu, Hongyi Cao
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引用次数: 0

Abstract

To meet the demand for long-distance and highly accurate detection in tunnel construction, a vibroseis source has been introduced into tunnel forward prospecting. However, serious noise in tunnels reduces the resolution of vibroseis signals, and small-scale structure recognition in tunnels requires higher signal resolution. Thus, we develop a time-frequency domain correlation method based on the synchrosqueezed wavelet transform for tunnel vibroseis data. Time-frequency domain correlation may capture more information than a single time or frequency domain correlation method, and its effectiveness depends on the time-frequency transformation method. The synchrosqueezed wavelet transform allows us to obtain high-resolution time-frequency spectra and thus helps to extract high-resolution effective signals. The advantages and disadvantages of different correlation methods are highlighted using numerical examples, in which the high resolution and strong robustness of the time-frequency domain correlation method based on the synchrosqueezed wavelet transform are demonstrated. A detailed field case study in an iron mine tunnel further demonstrates the reliability of the time-frequency domain correlation method based on the synchrosqueezed wavelet transform for practical data.

基于同步阙值小波变换的隧道振动时频域相关方法及其应用
为满足隧道施工中远距离高精度探测的需求,隧道前方探测中引入了震源。然而,隧道中严重的噪声降低了震源信号的分辨率,而隧道中小规模结构的识别需要更高的信号分辨率。因此,我们针对隧道震源数据开发了一种基于同步小波变换的时频域相关方法。与单一的时域或频域相关方法相比,时频域相关方法可以捕捉到更多的信息,其有效性取决于时频变换方法。同步queezed 小波变换可以让我们获得高分辨率的时频谱,从而有助于提取高分辨率的有效信号。利用数值示例突出说明了不同相关方法的优缺点,其中基于同步queezed 小波变换的时频域相关方法的高分辨率和强大鲁棒性得到了证明。在一个铁矿隧道中进行的详细实地案例研究进一步证明了基于同步queezed 小波变换的时频域相关方法在实际数据中的可靠性。
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来源期刊
Geophysical Prospecting
Geophysical Prospecting 地学-地球化学与地球物理
CiteScore
4.90
自引率
11.50%
发文量
118
审稿时长
4.5 months
期刊介绍: Geophysical Prospecting publishes the best in primary research on the science of geophysics as it applies to the exploration, evaluation and extraction of earth resources. Drawing heavily on contributions from researchers in the oil and mineral exploration industries, the journal has a very practical slant. Although the journal provides a valuable forum for communication among workers in these fields, it is also ideally suited to researchers in academic geophysics.
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