The interference fringe phenomenon appears when continuous wave subsurface penetrating radar is used to image on the uneven surfaces for nondestructive detection. As one of the main disturbances, the fringes will deteriorate the imaging results. The principle of this phenomenon is briefly studied and a filtering method to remove the fringes based on the distribution difference in frequency domain between cylindrical surfaces and target is proposed. Besides, according to the regular angle distribution of small target in frequency domain, a compensatory method by interpolation in a certain angle is studied to optimize the imaging results. Moreover, an effective imaging process for cylindrical subsurface detection based on the wavefront imaging algorithm is illustrated. The numerical and experimental data validate the applicability of proposed method and the results outperform the traditional approach of average subtraction.
许圣志,黄春琳,刘涛,覃尧,陆珉. 连续波穿透雷达柱面成像的干涉条纹抑制研究[J]. 电子与信息学报, 2015, 37(11): 2742-2748.
Xu Sheng-zhi, Huang Chun-lin, Liu Tao, Qin Yao, Lu Min. A Study of Removing Interference Fringes on Cylindrical Subsurface Imaging with Continuous Wave Penetrating Radar. JEIT, 2015, 37(11): 2742-2748.
Jin Tian. Research on theory and technique of ultra- wideband SAR shallow buried targets imaging and detection[D]. [Ph.D. dissertation], National University of Defense Technology, 2007.
Lei Wen-tai, Su Yi, and Huang Shi-jia. Ground penetrating radar near field 3-D range migration imaging technique[J]. Journal of Electronics & Information Technology, 2003, 25(12): 1641-1646.
[5]
Capineri L, Fiesoli F, and Windsor C. Holographic radar: a strategy for uneven surfaces[C]. 14th International Conference on Ground Penetrating Radar (GPR2012), Shanghai, 2012: 143-145.
[6]
Huang Chun-lin and Liu Tao. The Impact of an uneven medium surface in holographic penetrating imaging and a method to eliminate the interference[C]. International Technical Conference of IEEE Region 10 (IEEE TENCON2013), Xi’an, 2013: 1-4.
[7]
Sukhanov D and Zavyalova K. Three-dimensional non- contact subsurface radiotomography through a non-planar interface between media[C]. 15th International Conference on Ground Penetrating Radar (GPR2014), Brussels, 2014: 691-695.
[8]
Yasemin Altuncu, Ibrahim Akduman, and Ali Yapar. Detecting and locating dielectric objects buried under a rough interface[J]. IEEE Geoscience and Remote Sensing Letters, 2007, 4(2): 251-255.
[9]
Selda Yldz, Yasemin Altuncu, Ali Yapar, et al.. On the scattering of electromagnetic waves by periodic rough dielectric surfaces: a BOA solution[J]. IEEE Transactions on Geoscience and Remote Sensing, 2008, 46(9): 2599-2606.
[10]
Tolga Ulas Guürbuüz, Birol Aslanyuürek, Pinar Karabulut E, et al.. An efficient nonlinear imaging approach for dielectric objects buried under a rough surface[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(5): 3013-3022.
[11]
Xie Yao, Guo Bin, Xu Lu-zhou, et al.. Multistatic adaptive microwave imaging for early breast cancer detection[J]. IEEE Transactions on Biomedical Engineering, 2006, 53(8): 1647-1657.
[12]
Sheen M, McMakin L, and Hall E. Three-dimensional millimeter-wace imaging for concealed weapon detection[J]. IEEE Transactions of Microwave Theory and Techniques, 2001, 49(9): 1581-1592.
[13]
Diao Qi-long and Huang Chun-lin. A study of the interference stripe phenomenon caused by electromagnetic wave propagating in multi-layered medium[C]. 14th International Conference on Ground Penetrating Radar (GPR2012), Shanghai, 2012: 780-784.
Diao Qi-long and Huang Chun-lin. Restraining parasitic interference fringe phenomenon in detection imaging through the medium with inclined angle[J]. Acta Physica Sinica, 2012, 61(21): 1-10.
[15]
Fu Lei, Liu Si-xin, and Liu Lan-bo. Internal structure characterization of living tree trunk cross-section using gpr: numerical examples and field data analysis[C]. 15th International Conference on Ground Penetrating Radar (GPR2014), Brussels, 2014: 155-160.
[16]
Santos-Asssuncao S, perez-Gracia V, Caselles O, et al.. Geophysical exploration of columns in historical heritage buildings[C]. 15th International Conference on Ground Penetrating Radar (GPR2014), Brussels, 2014: 97-102.
[17]
Redman J D, Hans G, and Diamanti N. Effect of wood log shape on moisture content measurement using GPR[C]. 15th International Conference on Ground Penetrating Radar (GPR2014), Brussels, 2014: 181-185.
