测井技术2017，Vol.41Issue(6)：738-742,5.DOI:10.16489/j.issn.1004-1338.2017.06.021
基于EMD-小波包的随钻测量信号去噪方法
Signal Denoising Method for Measurement While Drilling Based on EMD-wavelet Packet
摘要
Abstract
In order to reduce the influence of noise on the signal during drilling process ,aiming at the problem that the EMD denoising method is rough and wavelet packet denoising methods is lack of adaptation ,a new denoising method based on EMD-wavelet packet is proposed .Firstly , the measured signal is divided into several IMF components by using the characteristics of EMD decomposition ;And then take advantage of the characteristics of signal autocorrelation function to find the main noise components of the IMF ,and using wavelet packet denoising method to denoise the the main noise components of the IMF ;Finally ,the denoised IMF component and the remaining components are reconstructed to obtain the measured signal while drilling .In order to verify the validity of the method ,the experiment is carried out and the signal is processed by this method .The results show that the method can remove the noise of the measured signal and improve the signal to noise ratio .关键词
随钻测量/信号去噪/经验模态分解/小波包/自相关Key words
measurement while drilling/signal denoising/empirical mode decomposition (EMD)/wavelet packet/autocorrelation分类
天文与地球科学引用本文复制引用
杨金显,蒋志涛,杨闯..基于EMD-小波包的随钻测量信号去噪方法[J].测井技术,2017,41(6):738-742,5.基金项目
国家自然科学基金(41672363,U1404510,61440007) （41672363,U1404510,61440007）
河南省科技攻关项目(172102210289) （172102210289）
河南省高校基本科研业务费专项资金(NSFRF1619) （NSFRF1619）
河南省创新型科技人才队伍建设工程(CXTD2016054) （CXTD2016054）
河南理工大学杰出青年基金(J2017-5) （J2017-5）
