摘要
在矿井地质雷达探测中有各种噪声干扰,为使得回波信号能准确清晰地反映目标体,必须对其进行处理,而常规的去噪方法效果不理想。采用小波变换的时频分析方法,能有效地消除噪声干扰,保留有效波信号中的低、中、高频成分。同时考虑到空间上道集的相关性,运用二维小波变换的理论,选择合适的小波基,并采用阀值量化的思想,通过分解和重构,得到去噪后的地质雷达记录。经过模型数据的研究和对矿井雷达数据的应用表明,二维小波变换具有较强的信噪分离能力,能够提高记录的信噪比和分辨率。
There were different noise interferences in the detection of the mine geological radar.In order to let the echo signal accurately and cleanly reflect the objective,the echo signals shall be processed.The results of the conventional noise eliminated method were not ideal.The application of the wavelet transforming time frequency analysis method could be effectively to eliminate the noise interference and keep the low,medium and high frequency content of the effective wave signals.Meanwhile,in consideration o...
出处
《煤炭科学技术》
CAS
北大核心
2008年第11期96-98,104,共4页
Coal Science and Technology
基金
东华理工大学校长基金资助项目(DHXK0825)
关键词
二维小波变换
去噪
矿井地质雷达
阀值
2D wavelet transforming
noise elimination
mine geological radar
valve value
