基于海底地形的海底目标物位置校正方法研究

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Position correction method for seabed targets based on seabed topography

YANGXiaodi1²，CHUNMinghao1²，LUO Xiaoqiao1²，LIHuazhi1，2

1.CNPCEngineering TechnologyResearch&Development CompanyLimited，Tianjin3OO451，China

2.CNPCKeyLaboratoryof Marine Engineering，Tianjin3O0451，China

Abstract：Sidescansonarisanimportant tolformeasuringseabedtopographicfeatures.However，sincethebeamreceivedbythe side-scansonardoesnotcontainbeamngleinformation，theteraincanaffectthemeasuementintheunevenareasoftheseabedand leadtothepositiondeviationoftheseaedget，makingitdiulttodeterineteauatepsitionoftetargetAccodigtothe acousticnterpretationmthodofacousticadiation，tispaperproposesapositioncoectionmetodfortheseabedtargetsbasedon seabedtopography.First，theactualdistancebetweentheside-scansonartransducerandtheseabed targetiscalculated.Then，the correspondingwaterdepth profilesareextractedfromtheseabed terain.Thedistancebetweeneach waterdepthpointonthewater depthprofilesandtheside-scasonar transduceriscalculatedinsequene.Ifthedistanceisqualtoteactualonebeteentheside scansonatransducerandtheseabedtarget，thewaterdepthpointistheactualilluminationpointofteacousticwavesemittedbythe side-scansonar.Theextractedpostionisthetruepositionoftheseabedtarget.Suchacorrectionmethodcanimprovetheposition measurementaccuracyofseabedtargets，whichisofgeatsignificanceforimprovingthequalityofmarineenginering measurements.At the sametime，itprovidesacertainreferenceforsome marine engineering projects requiringhigh-precision measurements.

Keywords： side-scan sonar; deviation; acoustic radiation; correction

侧扫声呐是进行海底地貌特征测量的重要工具，通过其获取的声呐图谱可以识别海底的特征地形、海底障碍物、海底人工构筑物等特征目标，在海洋开发活动中具有不可替代的作用[-3]。（剩余5132字）