煤矿安全2024，Vol.55Issue(1)：185-191,7.DOI:10.13347/j.cnki.mkaq.20230423
基于最优阈值参考的瞬变电磁法小波降噪效果研究
Study on wavelet denoising effect of transient electromagnetic method based on optimal threshold reference
董毅 1杨创1
作者信息
- 1. 中煤航测遥感集团有限公司,陕西 西安 710100
- 折叠
摘要
Abstract
The field data acquisition of transient electromagnetic method is prone to jump due to various random disturbances.Wave-let denoising realizes data denoising by multi-scale decomposition,threshold setting and reconstruction of signal.In order to im-prove the data quality of TEM after wavelet denoising,a new wavelet denoising method based on the optimal threshold reference is proposed to improve the threshold selection method.Combined with the application of transient electromagnetic method in water-rich engineering,the noise reduction results of data under different threshold conditions are compared and analyzed,and the practic-al application effect of the proposed algorithm is discussed.The results show that the proposed method can further reduce the value of the induced electromotive force curve in the range of 1-4 ms,and make the whole period attenuation characteristics of the data more obvious.The smoke ring inversion results of the denoised data were analyzed,and three locations with relatively large electric-al differences were explained,and the inversion results of the denoised data based on the optimal threshold reference were verified to be more accurate.关键词
瞬变电磁法/小波去噪/最优阈值/感应电动势曲线/烟圈反演Key words
transient electromagnetic method/wavelet denoising/optimal threshold/induced electromotive force curve/smoke ring inversion分类
矿业与冶金引用本文复制引用
董毅,杨创..基于最优阈值参考的瞬变电磁法小波降噪效果研究[J].煤矿安全,2024,55(1):185-191,7.
