| 基于小波变换的声波法测油井动液面信号去噪 |
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| 引用本文： | 王海文,林立星.基于小波变换的声波法测油井动液面信号去噪[J].工业仪表与自动化装置,2011(6):56-57. |
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| 作者姓名： | 王海文 林立星 |
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| 作者单位： | 中国石油大学(华东)石油工程学院,山东东营,257061 |
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| 摘 要： | 由于受到油套环空中各种噪声的影响,用声波法测油井动液面过程中,得到的反射声波信号异常复杂,常常出现液面反射位置不容易辨识的情况.该文分析了噪声产生的原因,将小波阈值去噪的方法用于声波法测油井动液面信号的噪声去除.结果显示,利用小波去噪方法处理油井动液面信号能够有效地去除噪声,随着小波分解层数的增加,利用小波方法去噪的效...
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| 关 键 词： | 声波法 动液面 信号处理 小波去噪 |
Signal denoising in liquid level detection with acoustic method using wavelet transform |
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| WANG Haiwen,LIN Lixing.Signal denoising in liquid level detection with acoustic method using wavelet transform[J].Industrial Instrumentation & Automation,2011(6):56-57. |
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| Authors: | WANG Haiwen LIN Lixing |
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| Affiliation: | (College of Petroleum Engineering,China University of Petroleum(East China),Shandong Dongying 257061,China) |
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| Abstract: | In liquid level detection with acoustic method,the reflected acoustic signal is complex due to the influence of the noises in the annulus between tubing and casing,and the real liquid level is difficult to be identified.The noises that influence the liquid level detection are analyzed,and wavelet threshold denoising is used to filter the noises in the acoustic signal of liquid level detection with acoustic method.The result shows that the wavelet denoising method is able to eliminate the noises effectively in the acoustic signal of liquid level detection,and the result is better with the increase of wavelet decomposition level. |
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| Keywords: | acoustic method liquid level signal processing wavelet denoising |
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