| 自适应串扰噪声消除技术在小孔径钻孔超声波检测中的应用 |
| |
| 引用本文： | 梁鸿翔,陈晶晶,王润田.自适应串扰噪声消除技术在小孔径钻孔超声波检测中的应用[J].声学技术,2009,28(3):249-252. |
| |
| 作者姓名： | 梁鸿翔 陈晶晶 王润田 |
| |
| 作者单位： | 中国科学院声学研究所东海研究站,上海,200032 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| |
| 摘 要： | 介绍了一种基于自适应滤波的噪声消除技术,分析了超声波用于小孔径钻孔检测中存在的同频串扰噪声的生成原因以及它对测量的影响,并对串扰噪声信号和待测信号进行建模;介绍了自适应噪声对消的原理,并针对应用给出了定步长自适应噪声的消除算法以及改进后的变步长自适应噪声消除算法,对两种算法在自适应学习速率上进行了比较,并给出经自适应去噪后的信号和原始信号的对比结果。
|
| 关 键 词： | 自适应噪声消除 串扰噪声 小孔径钻孔检测 |
| 收稿时间： | 2008/11/14 0:00:00 |
| 修稿时间： | 2009/1/6 0:00:00 |
Adaptive noise cancelling in small drilling hole detection |
| |
| LIANG Hong-xiang,CHEN Jing-jing and WANG Run-tian.Adaptive noise cancelling in small drilling hole detection[J].Technical Acoustics,2009,28(3):249-252. |
| |
| Authors: | LIANG Hong-xiang CHEN Jing-jing and WANG Run-tian |
| |
| Affiliation: | (Shanghai Acoustic Laboratory of Acoustic Institute, Chinese Academy of Sciences, Shanghai 200032, China) |
| |
| Abstract: | Adaptive noise cancelling technique has been introduced to eliminate the homo-frequency interference in the small drilling hole detection. Based on the model of the signal and interference, the principle of adaptive noise cancelling is described, Both Fixed Step Size Algorithm and Variable Step Size Algorithm of LMS are proposed, and the comparison between the adaptive learning rates and the results of noise cancelling with the two algorisms are made. |
| |
| Keywords: | adaptive noise cancelling interference noise small drilling hole detection |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《声学技术》浏览原始摘要信息 |
|
点击此处可从《声学技术》下载全文 |
