基于小波变换的岩石三轴蠕变曲线消噪分析  

Analysis of de-noising based on wavelet transform in triaxial creep experiment of rock

作　　者：韩冰[1] 王芝银[1] 

机构地区：[1]中国石油大学(北京)城市油气输配技术北京市重点实验室,北京102249

出　　处：《煤炭学报》2007年第3期243-247,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50374049)

摘　　要：借助小波变换的基本原理,采用Mallat塔式分解算法对蠕变曲线进行多分辨分析,并对分解后的小波系数进行阈值处理,滤去噪声部分,然后通过小波逆变换对系数进行重构,得到消噪后的信号.分析结果表明:应用小波变换对蠕变曲线的实际测点数据进行消噪处理,能够有效去除实验过程中由于机器自振和外界干扰产生的噪声影响,相应提高了测量曲线的信噪比,从而可以得到较为平滑的实验曲线.Based on the principle of wavelet transform,the creep curve was multi-resolution analyzed with Mallat pyramid algorithm,and the decomposition coefficients were filtered by selecting appropriate threshold.Finally,the de-noised signal was reconstructed by inverse wavelet transform.The method was applied to rock creep experiment to perform de-noising of the measure curve,the results show that it can effectively restrain noises and increase the signal to noise ratio,the good estimation results for signal proces...

关 键 词：小波变换 三轴蠕变 消噪 多分辨分析 

分 类 号：TU452[建筑科学—岩土工程]