摘要
利用小波变换对接收的瞬变电磁信号进行多分辨率分析,通过分解与重构,从中提取有效信号,去除干扰信号,得到去噪后的信号。该方法能有效地去除干扰信号,又不会损失有用信号。实际资料处理结果表明:该方法对去除瞬变电磁晚期信号的噪声干扰有很好的效果。
It is introduced that based on the frequency of useful signal, electronic surge in the apparatus and electromagnetic wave disturb in coal mine, we divide them into the useful signal responded by geological body and interferential signal; make use of wavelet transfer to do multi - resolution analysis; pick- up useful signal and get rid of intefferential signal by disassemble and reconstruct, then get a new signal. This method gets rid of the interferential signal successfully but does not lose useful signal. We can see the result from actual data： this method are resulfful in wiping off the noises of transient electromagnetic signal.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2007年第4期70-72,共3页
Coal Geology & Exploration
基金
国家自然科学基金项目(40674074)
高等学校博士学科点专项科研基金项目(200590501)
关键词
矿井瞬变电磁法
小波变换
多分辨率分析
去噪
coal mine transient electromagnetic method
wavelet transfer
multi- resolution analysis
get rid of noises
