多波束水体数据中旁瓣干扰处理方法研究
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摘要
多波束水体数据是水下物体后向散射强度数据,也是国内外的研究热点之一。本文系统的分析了旁瓣干扰对水体数据的影响,发现接收旁瓣干扰是影响多波束水体数据质量的关键因素。基于平坦海底情况下旁瓣干扰具有相同分布规律的特性,提出了一种适用于平坦海底的多波束水体数据处理方法。该方法在保留最小倾斜距离(Minimum Slant Range,MSR)内水体数据的基础上,可有效剔除MSR以外接收旁瓣干扰。通过模拟水体数据处理验证以及实测水体数据处理分析,发现该方法提高了水体数据中目标的识别能力。
The multibeam water column data(WCD) is backscatter data from underwater target. And it has become a hot spot of technical research. The influence of sidelobe inWCD is analyzed. It is suggested that receiving sidelobe interference is a key factor of effecting WCD quality. Based on the uniform distribution characteristics of receiving sidelobe interference in the flat seabed,authors propose aWCD processing method in flat area. This method can keep the data within minimum slant distance(MSR), and filter sidelobe interference beyond MSR. Simulated WCD and measured data obtained by Kongsberg EM122 multibeam system is processed by this method. It is found that this method can enhance the capacity inobject detection.
The multibeam water column data(WCD) is backscatter data from underwater target. And it has become a hot spot of technical research. The influence of sidelobe inWCD is analyzed. It is suggested that receiving sidelobe interference is a key factor of effecting WCD quality. Based on the uniform distribution characteristics of receiving sidelobe interference in the flat seabed,authors propose aWCD processing method in flat area. This method can keep the data within minimum slant distance(MSR), and filter sidelobe interference beyond MSR. Simulated WCD and measured data obtained by Kongsberg EM122 multibeam system is processed by this method. It is found that this method can enhance the capacity inobject detection.
引文
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[11] 翁宁宁.多波束海底测深隧道效应及其自适应消除方法研究[D].哈尔滨:哈尔滨工程大学,2009.Weng N N.Study on Tunnel Effect in Multi-beam Seafloor Bathymetry and Its Adaptive Eliminating Methods[D].Harbin:Harbin Engineering Univercity,2009.
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[13] Jens S V D,Hoffmann J.Mapping Gas Pockmarks and Gas Emission off New Zealand:Multibeam Mapping and Acoustic Water Column Imaging;Cruise Report POLARIS 12PLO15[R].Otago,New Zealand:University of Otago,2012:1-12.
[2] Colbo K,Ross T,Brown C,et al.A review of oceanographic applications of water column data from multibeam echosounders[J].Estuarine Coastal & Shelf Science,2014,145(5):41-56.
[3] Deimling J S V,Brockhoff J,Greinert J.Flare imaging with multibeam systems:Data processing for bubble detection at seeps[J].Geochemistry Geophysics Geosystems,2007,8(6):1-7.
[4] Innangi S,Bonanno A,Tonielli R,et al.High resolution 3-D shapes of fish schools:A new method to use the water column backscatter from hydrographic MultiBeam Echo Sounders[J].Applied Acoustics,2016,111:148-160.
[5] Wyllie K,Weber T,Armstrong A.Using Multibeam Echosounders for Hydrographic Surveying in the Water Column:Estimating Wreck Least Depths[C].National Harbor,MD :U.S.Hydrographic Conference,2015.
[6] 郑双强,刘洪霞,阳凡林,等.多波束声纳水柱影像分析工具的设计与实现[J].海洋测绘,2016,36(6):46-49.Zheng S Q,Liu H X,Yang F L,et al.Design and implementation of multibeam sonar water column image analysis toolkit[J].Hydrographic Surveying and Charting,2016,36(6):46-49.
[7] Mcgonigle C,Grabowski J H,Brown C J,et al.Detection of deep water benthic macroalgae using image-based classification techniques on multibeam backscatter at Cashes Ledge,Gulf of Maine,USA[J].Estuarine Coastal & Shelf Science,2011,91(1):87-101.
[8] Church I,Quas L,Williamson M.Multibeam Water Column Data Processing Techniques to Facilitate Scientific Bio-Acoustic Interpretation[C].Galveston,Texas USA:U.S.Hydrographic Conference,2017.
[9] Simmons S M,Parsons D R,Best J L,et al.Monitoring suspended sediment dynamics using MBES[J].Journal of Hydraulic Engineering,2010,136(1):45-49.
[10] Urban P,K?ser K,Greinert J.Processing of multibeam water column image data for automated bubble/seep detection and repeated mapping[J].Limnology & Oceanography Methods,2017,15(1):1-21.
[11] 翁宁宁.多波束海底测深隧道效应及其自适应消除方法研究[D].哈尔滨:哈尔滨工程大学,2009.Weng N N.Study on Tunnel Effect in Multi-beam Seafloor Bathymetry and Its Adaptive Eliminating Methods[D].Harbin:Harbin Engineering Univercity,2009.
[12] Clarke J E H.Applications of multibeam water column imaging for hydrographic survey[J].Hydrographic Journal,2006,120(120):1-33.
[13] Jens S V D,Hoffmann J.Mapping Gas Pockmarks and Gas Emission off New Zealand:Multibeam Mapping and Acoustic Water Column Imaging;Cruise Report POLARIS 12PLO15[R].Otago,New Zealand:University of Otago,2012:1-12.