基于模糊分形脉冲反褶积的探地雷达信号处理
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摘要
为了提高探地雷达的分辨率,降低雷达探测过程中衰减、频散及其他干扰所造成的影响,提出了基于模糊分形脉冲反褶积应用于探地雷达信号的后处理,用分形特征取代反褶积中对反射系数功率谱为白噪的假设,并给出了具体的实现步骤;为了验证该方法的合理性,以直径为100mm的PVC塑料管为标定物,设计了将标定物以不同深度和不同间距埋置在沙体中的模型试验。理论分析和试验结果表明:基于模糊分形脉冲反褶积的原理处理雷达信号,对于降低噪声干扰和提高分辨率有着一定的优势,可作为雷达信号处理方法一种很好的补充。
In order to improve the resolution of ground-penetrating radar,and reduce attenuation,dispersion and effects caused by other interference in the process of radar detection,the deconvolution based on fuzzy fractal pulse was proposed to be applied to signal processing of ground-penetrating radar.The assumption that the power spectrum of reflection coefficient was white noise was replaced by the fractal feature,and the specific implementation steps were provided.In order to verify the reasonableness of the method,a PVC plastic pipe with a diameter of 100 millimeters was taken as a calibration object and a model test was designed with the calibration object buried in the sand at different depths and different intervals.The theoretical analysis and experimental results show that for lowering noise and improving resolution,there are certain advantages to deal with radar signals on the principle of the deconvolution based on fuzzy fractal pulse,which can be used as a good supplement for radar signal processing.
In order to improve the resolution of ground-penetrating radar,and reduce attenuation,dispersion and effects caused by other interference in the process of radar detection,the deconvolution based on fuzzy fractal pulse was proposed to be applied to signal processing of ground-penetrating radar.The assumption that the power spectrum of reflection coefficient was white noise was replaced by the fractal feature,and the specific implementation steps were provided.In order to verify the reasonableness of the method,a PVC plastic pipe with a diameter of 100 millimeters was taken as a calibration object and a model test was designed with the calibration object buried in the sand at different depths and different intervals.The theoretical analysis and experimental results show that for lowering noise and improving resolution,there are certain advantages to deal with radar signals on the principle of the deconvolution based on fuzzy fractal pulse,which can be used as a good supplement for radar signal processing.
引文
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[9]田钢,石战结,董世学,等.利用微测井资料补偿地震数据的高频成分[J].石油地球物理勘探,2005,40(5):546-547.TIAN Gang,SHI Zhan-jie,DONG Shi-xue,et al.Compensating the seismic data high frequency compo-nent using micro-seismogram logs[J].Oil Geophysi-cal Prospecting,2005,40(5):546-547.(in Chinese)
[10]崔阿李,刘康和.探地雷达技术在岩溶探测中的应用[J].地球科学与环境学报,2008,30(2):197-199,213.CUI A-li,LIU Kang-he.Application of ground pene-trating radar(GPR)technology in karst survey[J].Journal of Earth Sciences and Environment,2008,30(2):197-199,213.(in Chinese)
[11]苏茂鑫.减少吸收衰减影响的高分辨率探地雷达技术研究[D].长春:吉林大学,2007.SU Mao-xin.Study on high-resolution GPR techniquethrough reducing the influences of absorption and at-tenuation[D].Changchun:Jinlin University,2007.(inChinese)
[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.ZENG Zhao-fa,LIU Si-xin,WANG Zhe-jiang,et al.Method theory and application of ground penetratingradar[M].Beijing:Science and Technology Press,2006.(in Chinese)
[3]罗国安,武威,李合群,等.快速叠后偏移反褶积算法及应用[J].石油地球物理勘探,2010,45(6):844-849.LUO Guo-an,WU Wei,LI He-qun,et al.Fast poststack migration deconvolution algorithm and its appli-cation[J].Oil Geophysical Prospecting,2010,45(6):844-849.(in Chinese)
[4]王大兴,雷晓.分形反褶积方法研究及应用[J].石油物探,1996,35(4):1-10WANG Da-xin,LEI Xiao.Study on method of fractaldeconvolution and its application[J].GeophysicalProspecting for Petroleum,1996,35(4):1-10(in Chi-nese)
[5]王嘉松,曹桂荣.分形脉冲反褶积方法[J].地球物理学报,1998,41(1):99-108WANG Jia-song,CAO Gui-rong.The method of frac-tal impulse deconvolution[J].Chinese Journal of Geo-physics,1998,41(1):99-108.(in Chinese)
[6]刘大为.探地雷达资料的确定性反褶积处理研究[J].工程地球物理学报,2001,1(6):520-524.LIU Da-wei.Research on the deterministic deconvolu-tion processing of ground penetrating radar data[J].Chinese Journal of Engineering Geophysics,2001,1(6):520-524.(in Chinese)
[7]周洁玲,成世琦.反褶积与信噪比的关系研究[J].西安石油学院学报:自然科学版,2002,17(4):24-27.ZHOU Jie-ling,CHENG Shi-qi.Study on the relationship between deconvolution and signal to noise ratio[J].Journal of Xi’an Petroleum Institute:Edition ofNatural Science,2002,17(4):24-27.(in Chinese)
[8]张志禹,刘亚丽,汪文秉.探地雷达信号的反褶积研究[J].西安理工大学学报,2007,23(2):123-126.ZHANG Zhi-yu,LIU Ya-li,WANG Wen-bing.Re-search on the deconvolution of ground penetrating ra-dar signal[J].Journal of Xi’an University of Tech-nology,2007,23(2):123-126.(in Chinese)
[9]田钢,石战结,董世学,等.利用微测井资料补偿地震数据的高频成分[J].石油地球物理勘探,2005,40(5):546-547.TIAN Gang,SHI Zhan-jie,DONG Shi-xue,et al.Compensating the seismic data high frequency compo-nent using micro-seismogram logs[J].Oil Geophysi-cal Prospecting,2005,40(5):546-547.(in Chinese)
[10]崔阿李,刘康和.探地雷达技术在岩溶探测中的应用[J].地球科学与环境学报,2008,30(2):197-199,213.CUI A-li,LIU Kang-he.Application of ground pene-trating radar(GPR)technology in karst survey[J].Journal of Earth Sciences and Environment,2008,30(2):197-199,213.(in Chinese)
[11]苏茂鑫.减少吸收衰减影响的高分辨率探地雷达技术研究[D].长春:吉林大学,2007.SU Mao-xin.Study on high-resolution GPR techniquethrough reducing the influences of absorption and at-tenuation[D].Changchun:Jinlin University,2007.(inChinese)
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