西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (4): 165-168.DOI: 10.3863/j.issn.1674 – 5086.2011.04.031

• 石油机械工程及其他 • 上一篇    下一篇

基于小波变换的钻头实验信号降噪方法

史革盟1, 李 斌2   

  1. 1. 宝鸡文理学院机电工程系, 陕西 宝鸡 721007;2. 西南石油大学机电工程学院, 四川 成都 610500
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-08-20 发布日期:2011-08-20

The De-Noising Method of the Drill Testing Signal Based on Wavelet Transform

SHI Ge-meng1, LI Bin2   

  1. 1. Department of Mechanical Engineering, Baoji University of Arts and Sciences, Baoji, Shanxi 721007, China; 2. School ofMechanical and Electrical Engineering, Southwest Petroleum University, ChengDu, Sichuan 610500, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-08-20 Published:2011-08-20

摘要: 在钻头破岩实验中存在钻头对岩石的周期性动载冲击, 同时受实验设备和环境等因素的影响, 在动态
信号中存在着大量噪声, 无法获得准确的测试数据, 实验结果往往不能真实反映实验的特性和规律。基于
小波变换的浮动阈值方法, 建立了一套用于钻头破岩实验测试信号噪声压制方法, 通过对实验和实测数据
的处理和分析, 证明了方法有效性, 提高了实验数据的准确性和可靠性。

关键词: 钻头破岩实验, 测试信号, 噪声, 小波变换, 浮动阈值

Abstract: There are cyclical dynamic shocks between the bit body and rocks during the rocks breaking tests. Mean-
while, due to the influence of the test equipments and environmental factors, a lot of noises appear in the drill test
signals, which make it impossible to get accurate test data. Thus, the results often can not truly reflect the charac-
teristics and laws of tests. In this paper, a set of noise removing methods are established on the basis of the floating
threshold algorithm of wavelet transform. After the process and analysis on the practical test data, the methods are
demonstrated to have a good filtering effect on the noise, and are able to improve the accuracy and reliability of the
signal.

Key words: rock breaking test, test signal, noise, wavelet transform, floating threshold

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