多波束系统搜救水下目标的探测深度计算

Underwater Sounding Calculation of Multibeam Echosounder System for Underwater Target Search and Rescue

摘要:

针对多波束测深系统种类、探测模式等因素影响水下目标搜索效能的问题，提出了一种面向水下目标搜索的多波束系统探测深度计算方法。分别对多波束系统等角与等距模式进行探讨，考虑波束间重叠角的影响，由多波束横向分辨率计算公式推导了 2 种模式的探测深度公式，并将不同波束角度的探测深度进行计算。经过结果比对，总结出等角模式搜索水下目标的探测能力要优于等距模式。最后结合算例，得出多波束探测能力与目标尺寸、海水深度、波束开角有关。

Abstract:

A method for calculating the depth of a Multibeam Echosounder System（MBES） for underwater target search is proposed based on factors such as the types and detection modes of MBES. The equiangular and equidistant modes of MBES are discussed separately，taking into account the influence of beam overlapping angles. Two formulas for calculating the depth of each mode are derived from multibeam transverse resolution formula，and the depths of different beam angles are calculated. After comparing the results，it is concluded that the detection capability of the equiangular mode for searching underwater targets is superior to that of the equidistant mode. Finally，a case study is conducted to show that the detection capabilities of MBES are related to target size，water depth，and beam opening angle.