| 井下套管声波通讯的小波去噪 |
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| 引用本文： | 景宇富,程为彬,郭颖娜,霍爱清. 井下套管声波通讯的小波去噪[J]. 石油机械, 2011, 39(6): 33-35,93 |
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| 作者姓名： | 景宇富 程为彬 郭颖娜 霍爱清 |
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| 作者单位： | 西安石油大学电子工程学院 |
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| 基金项目： | 陕西省科学技术研究发展计划项目“旋转导向钻井地面下行通讯导流关键技术研究”(2010k07-09); 中国石油天然气集团公司中青年创新基金项目“智能旋转垂直钻井工具稳定平台关键控制技术研究”(07E1014); 陕西省教育厅专项科研计划项目“旋转导向钻井电磁转矩控制理论和技术研究”(09JK687) |
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| 摘 要： | 井下套管声波通讯中,接收信号掺杂着很多高次谐波和多种噪声,声波衰减时间长,导致井下套管声波通讯抗干扰性差,通讯速率低。模拟去噪电路滤波的阈值受到电子元件参数值的限制,滤波频率单一。通过分析声波在套管中的传播特性,建立数学模型,提出利用小波分析设置信号阈值去噪法,达到消噪、缩短信号衰减周期和提高信号传输率的目的。通过仿真波形和试验波形的对比,验证了该方法的可行性。
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| 关 键 词： | 套管 声波 阈值去噪 小波分析 仿真 |
The wavelet denoising in downhole casing acoustic communication. |
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| Jing Yufu,Cheng Weibin,Guo Yingna,et al.. The wavelet denoising in downhole casing acoustic communication.[J]. China Petroleum Machinery, 2011, 39(6): 33-35,93 |
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| Authors: | Jing Yufu Cheng Weibin Guo Yingna et al. |
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| Affiliation: | Jing Yufu(College of Electronic Engineering,Xi'an Shiyou University,Xi'an),Cheng Weibin,Guo Yingna,et al. |
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| Abstract: | In downhole casing acoustic communication the received signals are mixed with many high harmonics and many kinds of noises,and the long period of acoustic attenuation leads to poor noise immunity and low communication rate.The simulation of the threshold of denoise circuit filtering is restricted by the parametric values of electronic components with single filtering frequency.By analyzing the transmission characteristics of acoustic waves in casing,the mathematical model was established and the denoise met... |
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| Keywords: | casing acoustic wave threshold denoising wavelet analysis simulation |
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