基于反褶积的探地雷达高分辨率处理方法

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'基于反褶积的探地雷达高分辨率处理方法'
苏茂鑫,李术才,薛翊国,邱道宏山东大学 岩土与结构工程研究中心,山东 济南250061摘要:为了降低探地雷达探测过程中衰减、频散及其他干扰所造成的影响,提出一种基于 反褶积技术的探地雷达高分辨率处理方法?该方法建立在地层系统响应模型基础之上,通 过从原始记录中求取地层频谱校正因子,对原始记录的频谱进行校正,达到改善探地雷达 剖面记录,提高探测分辨率目的.地层频谱校正因子决定了地振频谱校正方法应用效果的 好坏,通过研究因子的求取和选择方法,对比分析校正前后的频谱和剖面情况,同时与 尖脉冲反褶积和带通滤波的应用效果做比较,结果表明:地层频谱校止方法相对于传统 的尖脉冲反褶积和带通滤波方法更能改善整个剖面的信噪比,提高深部信号的分辨率.关键词:地层频谱校正系统响应高分辨率反褶积Ground penetrating radar's high resolution processing method based on deconvolutionSU Mao-xin, LI Shu-cai, XUE Yi-guo, QIU Dao-hongResearch Center of Geotechnical and Structural Engineering, ShandongUniversity, Jinan 250061,ChinaAbstract:In order to reduce the impact of attenuation, dispersion and other interference in the ground penetrating radar(GPR) detection, wherepresents a GPR's high resolution processing method based on the deconvolution technique was presented. The method is built on the stratum system response model, through computing a stratum spectrum correction factor from the GPR's raw data, and the raw data's spectrum will be corrected, which will improve the GPR's profile recorder and enhance the detection vertical resolution. As the stratum spectrum correction factor decides the application effect of the stratum spectrum correction method, through studying the factor's calculating and selection method, comparative analysis of the spectrum and the profile situation pre and post correction was carried out, and the application effect was compared to those of the sharp pulse deconvolution and the band filter method. The comparison results show that the profile's effective frequency range is bordened after the correction, and the stratum spectrum correction method can serve to improve the whole profile's signal to noise ratio(SNR) and enhanee the resolution of the deep signals.Keywords: stratum spectrum correction system response high resolution deconvolution收稿日期修回日期网络版发布日期DOI: 10.3785/j.issn.1008 973X.2010.06.028基金项目:国家“863”高技术研究发展计划资助项目(2007AA11Z131);国家自然科学基金 资助项目(50908134,40902084);国家自然科学基金仪器专项基金资助项目 (50727904);山东省博士后创新专项资金资助项0(200703076).通讯作者:李术才,男,教授.作者简介:参考文献:[1]李大心.探地雷达方法与应用[M].北京:地质出版社,1994: 14.[2] 曾昭发,刘四新,王者江,等?探地雷达方法原理及应用[M] ?北京:科学出版 社,2006: 141164.[3] 赵永辉,吴健生,万明浩?多次叠加技术在探地雷达资料处理中的应用[J] ? 物探与化探,2000,24(3): 215218.ZHAO Yong hui, WU Jian sheng, WAN Ming hao. The application of multiple stacking technique to the data processing work of ground penetrating radar [J] . Geophysical and Geochemical Exploration, 2000, 24(3): 215218.[_4 ] PEDRO X N. A practical approach to correct attenuation effects in GPR data [J] . Journal of Applied Geophysics, 2006,59(3): 140151.[5] TURNER G, SIGGINS A F. Constant Q attenuation of subsurface radar pulses [J] . Geophysics, 1994, 59(8): 11921200.「6] TIM B, KLAUS H. Finite difference modeling of electromagnetic wave propagation in dispersive and attenuating media [J]? Geophysics, 1998, 63 (3): 856867.[7 ] JAMES D, ROSEMARY J. Removalof wavelet dispersion from ground penetrating radar data [J] . Geophysics, 2003, 6
关 键 词:
基于 反褶积 雷达 高分辨率 处理 方法
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