基于直线检测算法的矢量波导不变量估计  

Vector waveguide invariant estimation based on the lines segment detector al⁃gorithm

作　　者：莫世奇 王博[2] 李韬哲 MO Shiqi;WANG Bo;LI Taozhe(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;Hangzhou Applied Acoustic Research Institute,Hangzhou 310000,China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001 [3]杭州应用声学研究所,浙江杭州310000

出　　处：《哈尔滨工程大学学报》2023年第10期1748-1757,共10页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52271343)。

摘　　要：针对由于复杂海洋环境会对声场干涉条纹结构产生影响,导致常用的空间变换类算法无法良好地提取干涉条纹的问题。本文基于典型浅海环境声场,提出利用直线检测算法提取矢量声场的干涉条纹,并以此进行波导不变量的估计。将声压谱和水平振速谱融合来增强其中的干涉条纹部分,以便后续在不同环境参数下均可提取到清晰的条纹,再利用统计量的方式进行波导不变量数值估计。仿真分析表明:即使在较复杂的浅海负跃层波导环境下,利用直线检测算法依然能够检测到较为完整的干涉条纹,并能够估计出精度较高的波导不变量值。The commonly used spatial transformation algorithms cannot extract interference fringes very well due to the influence of complex ocean environments on the structure of interference fringes in the sound field.Refer⁃ring to the sound field in a typical shallow sea environment,this paper examined the interference fringes of the vector sound field using the lines segment detector(LSD)algorithm and estimated the waveguide invariant.First,we fused the sound pressure spectrum and horizontal vibration velocity spectrum to enhance the interference fringes,allowing the clear fringes to be extracted under different environmental parameters.Then,we performed the numerical estimation of the waveguide invariant by means of statistics.The simulation results revealed that even in a complex shallow sea negative thermocline waveguide environment,the lines segment detector(LSD)al⁃gorithm can still detect relatively complete interference fringes and estimate the waveguide invariant value with high precision.

关 键 词：声场干涉结构 HOUGH变换 RADON变换 干涉条纹 波导不变量 声压谱 水平振速谱 直线检测 

分 类 号：TB566[交通运输工程—水声工程]