摘要
声纳利用声波进行水深探测时,需要通过声线追踪才能反演计算出准确的波束脚印位置。针对深水多波束声纳作业过程中对声线追踪计算兼顾效率与准确性的实际需求,提出了一种快速声线追踪方法。该方法主要利用海洋中声速在温度跃变层与深海等温层中存在的线性变化特征,通过道格拉斯-普克算法对声速剖面进行减缓,剔除掉对声线追踪结果影响较小的声速采样点,以提高声线追踪的计算效率。分析并证明了声速剖面简化对声纳边缘波束脚印反演精度影响最大的结论,以此设计并实现了一种基于“反馈”机制的误差控制方法,能够自适应对声速剖面进行最大程度简化,在保证声线追踪结果满足准确性需求的基础上,有效提高计算效率。实验结果表明所提方法能够在1‰的允许误差条件下,提高声线追踪计算效率10倍~100倍,有效兼顾了声线追踪的效率与准确性,满足多波束声纳作业现场分析与决策需求。
It is necessary to use the acoustic ray tracing method for the accurate beam footprint position inversion during bathymetric sonar detection.Aiming at the demand for both efficiency and accuracy of ray tracing calculation in the process of deep-water multi-beam sonar operations,a fast method of acoustic ray tracing is proposed.This method mainly makes use of the linear characteristics of the sound velocity in the ocean,especially in the thermocline and isothermal layers,and uses the Douglas-Peucker algorithm to simplify the sound velocity profile.It can effectively eliminate the sound velocity data points which have little influence on the results of acoustic tracing,to improve the computational efficiency.The conclusion that the simplification of the sound velocity profile has the greatest impact on the inversion accuracy of the sonar edge beam’s footprint is analyzed and proved.According to this conclusion,an error control method based on a feedback mechanism is proposed,which can simplify the sound velocity profile to the greatest extent,on the premise of ensuring that the sound ray tracing results meet the accuracy requirements.The experimental results show that the proposed method can improve the calculation efficiency of acoustic ray tracing by 10-100 times under the condition of 1‰allowable error,combine the efficiency and accuracy,and meet the needs of multi-beam sonar operation and decision-making.
作者
汤巧英
黄智才
TANG Qiaoying;HUANG Zhicai(School of Economics and Information,Zhejiang Tongji Vocational College of Science and Technology,Hangzhou Zhejiang 311231,China;School of Earth Sciences,Zhejiang University,Hangzhou Zhejiang 310027,China;Institute for Geography and Spatial Information,Hangzhou Zhejiang,310027,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2022年第11期1530-1537,共8页
Chinese Journal of Sensors and Actuators
基金
国家“863”高技术研究发展计划资助项目(2007AA090901)。
关键词
海洋
多波束声纳
声线追踪
声速剖面
误差控制
marine
multi-beam sonar
acoustic ray tracing
sound velocity profile
inaccuracy control
