均匀线阵多波束声纳通道一致性现场校准方法  

A field calibration method for channel consistency of linear equispaced array multibeam sonar

作　　者：郑明波 刘玮峰 刘冲 夏天宇 张浩 ZHENG Mingbo;LIU Weifeng;LIU Chong;XIA Tianyu;ZHANG Hao(Jiangsu Hi-Target Marine Information Technology Co.Ltd.,Nanjing 210032;Changjiang Wanzhou Waterway Division,Chongqing 404100)

机构地区：[1]江苏中海达海洋信息技术有限公司,江苏南京210032 [2]长江万州航道处,重庆404100

出　　处：《海洋测绘》2025年第1期39-43,共5页Hydrographic Surveying and Charting

基　　金：国家重点研发计划(2021YFB2600704)。

摘　　要：通道一致性是多波束声纳的重要参数,其影响成像质量和测底精度,在多波束声纳技术中具有重要意义。为在非实验室环境中实现均匀线阵多波束声纳通道一致性的精确校准,在远场条件下利用测量信号估计各通道的理论相位,并根据估计值与实测值的偏差初步估计相位的不一致参数;利用同一区域水底测量结果与测量设备方向无关的事实,分析给出相位校准剩余误差的计算方法。按照型号为iBeam8120的多波束声纳的参数进行校准仿真验证,结果与理论预测相符。该方法无须在实验室环境中进行,提高了通道一致性校准的便利性。To achieve accurate calibration of linear equispaced array multi-beam sonar channels in non-laboratory environments,a method was developed.The ideal phase was estimated based on the principle that the phase from a fixed direction signal changes linearly with the element number of linear equispaced array under far-field condition.Initial parameters for phase inconsistency were determined based on deviations between measured and estimated values.Taking advantage of the fact that the measured results on the same seafloor are independent of the device direction,a method for calculating phase residual errors was analyzed.Ultimately,an unbiased estimation formula for phase inconsistency parameters was provided.Simulation was conducted according to the specifications of IBeam8120 sonar,showing results consistent with theoretical predictions.This method can be conducted in no-laboratory,thereby enhancing the convenience of channel consistency calibration.

关 键 词：多波束声纳 通道一致性校准 均匀线阵 现场校准 无偏估计 

分 类 号：P229[天文地球—大地测量学与测量工程]