顾及横向分辨率的目标探测极限深度计算  

Calculation of the limited depth of multi-beam system considering lateral resolution in underwater objects detection

作　　者：周青[1] 蒋其伟[1] 边刚 徐西臣 蔡舒[1] ZHOU Qing;JIANG Qiwei;BIAN Gang;XU Xichen;CAI Shu(92292 Troops,Qingdao 266405,China;Department of Military Oceanography and Hydrography,Dalian Naval Academy,Dalian 116018,China)

机构地区：[1]92292部队,山东青岛266405 [2]海军大连舰艇学院军事海洋与测绘系,辽宁大连116018

出　　处：《海洋测绘》2021年第5期57-60,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41876103)。

摘　　要：横向分辨率是多波束系统探测分辨率的主要决定因素,当进行水下目标探测时,其直接影响着探测极限深度的选择。探讨了顾及横向分辨率的水下目标探测极限深度的计算,并以SeaBeam3030型多波束系统为例,给出了等角和等距两种模式的极限深度计算方法,通过仿真计算与分析,验证了计算方法的有效性。结论表明:无论是等角还是等距模式,横向分辨率由中央向外分辨率逐渐增大,并且在等距模式下,探测目标在横向上边缘失真明显,数据不能用于成图。给出的顾及横向分辨率的极限深度计算方法,可为不同类型的多波束测深系统进行水下目标探测提供依据参考。The lateral resolution is the main determinant resolution of multi-beam system.In the object detection, the limited detection depth is calculated by the lateral resolution.Considering of lateral resolution, the theoretical calculation of the limited depth of SeaBeam3030 multi-beam system has been discussed in underwater targets detection.The limited depth of equiangular and equidistant modes have been analyzed.The calculation methods have been testified by the simulated data.The results show that the lateral resolution will be larger from the central to the edge beam in both equiangular and equidistant mode.Moreover the detection object will be distorted in the edge of the object, so the data can not be used for mapping.The limit depth calculated method of Seabeam 3030 system can provide references for the object detection with the different types of multi-beam system.

关 键 词：多波束测深仪 目标探测 极限深度 横向分辨率 等角模式 等距模式 

分 类 号：P229[天文地球—大地测量学与测量工程]