渔业现代化2025，Vol.52Issue(1)：89-98,10.DOI:10.3969/j.issn.1007-9580.2025.01.009
多波束宽带渔用声呐旋转扇区扫描发射性能分析
Performance analysis of multi-beam broadband fishing sonar rotating sectors scan transmission
摘要
Abstract
Fishing sonar utilizes sound waves to detect the distribution and activities of underwater fish schools.It typically employs either omni-directional transmission or directional scanning transmission methods for preliminary detection of the position of fish schools.However,there are several limitations with these traditional methods,including poor signal directivity in omni-directional transmission and uneven beam coverage in directional scanning transmission.To address these challenges,this study proposed an improved method based on rotating sector scanning,which aims to optimize the detection performance and meet the specific requirements of fishery sonar in practical fishing scenarios.This study used acoustic simulation methods to systematically analyze the factors that influence the scanning transmission performance,such as the number of sectors and the boundary angles between sectors.The performance of the proposed method was further validated through pool tests conducted under controlled laboratory conditions.The simulation results showed that the use of a four-sector rotating sector scanning transmission method effectively improves the signal directivity while maintaining a full 360° horizontal scan coverage.Specifically,the main lobe intensity was increased by 8 dB when compared to omni-directional transmission,and the maximum intensity difference within a single sector's transmission beam was reduced to less than 1.5 dB,with the beamwidth difference kept within 2°.These results demonstrated the advantages of the proposed method in enhancing the detection capabilities of the sonar system.To further evaluate the practical performance of the system,laboratory pool tests were carried out to measure the transmission directivity between two adjacent sectors.The results from these tests showed that the proposed method improves the directivity by approximately 8 dB on average over a 64° range in front of the two sectors compared to the omni-directional transmission.This finding suggests that the proposed design not only enhances the efficiency and accuracy of fish school detection but also helps to obtain accurate fish information in a wider range.关键词
渔用声呐/旋转扇区/波束成形Key words
fishing sonar/rotating sector/beamforming分类
农业科技引用本文复制引用
魏珂,程婧,王志俊,李国栋..多波束宽带渔用声呐旋转扇区扫描发射性能分析[J].渔业现代化,2025,52(1):89-98,10.基金项目
海南省科技计划三亚崖州湾科技城科技创新联合项目(2021CXLH0004) （2021CXLH0004）
国家重点研发计划(2023YFD2401304) （2023YFD2401304）
国家自然科学基金(32073026),崂山实验室科技创新项目(LSKJ202201801). （32073026）
