| 基于小波包降噪的地磁场干扰数据分析 |
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| 引用本文： | 徐斌,顾伟.基于小波包降噪的地磁场干扰数据分析[J].上海海事大学学报,2014,35(1):69-73. |
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| 作者姓名： | 徐斌 顾伟 |
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| 作者单位： | 上海海事大学 物流工程学院,上海海事大学 物流工程学院 |
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| 基金项目： | 国家国际科技合作专项（2012DFG71850） |
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| 摘 要： | 针对在港口消磁站附近港口日常作业时产生的磁场干扰以及地球地磁日变对港口消磁站的磁场测量造成严重干扰的现象,采用基于小波包降噪的办法进行干扰抑制处理.该办法通过对干扰源进行分析及实验模拟,得出磁场干扰的原因及特征.通过实际磁场测量数据分析,得出消磁站附近港口日常作业时产生的磁场干扰对地磁场Z分量造成的影响.采用小波包降噪算法,通过小波包基变化,重构受干扰磁场数据,进行干扰抑制处理.处理结果表明,此方法能够有效抑制干扰,对提高港口消磁站磁场测量的准确性有积极意义.
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| 关 键 词： | 地磁场 小波包 降噪算法 磁场干扰 |
| 收稿时间： | 2013/5/30 0:00:00 |
| 修稿时间： | 2013/11/5 0:00:00 |
Geomagnetic interference data analysis based on wavelet packet denoising |
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| Institution: | SHANGHAI MARITIME UNIVERSITY and - |
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| Abstract: | Because of such phenomena as serious magnetic interference during daily port operations, and daily geomagnetic variation influence on the measurement for magnetic field at port degaussing stations, the interference rejection method based on wavelet packet denoising is used. In this method, the causes and characteristics of magnetic interference are drawn through analysis and simulation on interference source. Through the analysis on actual magnetic field measurement data, the influence of the magnetic interference on the Z component of geomagnetic field is drawn, where the interference results from daily port operations at port degaussing stations. The wavelet packet denoising algorithm is used to reconstruct the interfered magnetic field data by the transformation of wavelet packet basis and to suppress the interference. The results show that the method can suppress the interference effectively and has positive significance for improving accuracy of magnetic field measurement in port degaussing stations. |
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| Keywords: | geomagnetic field wavelet packet denoising algorithm magnetic interference |
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