基于成像声呐的鱼类长度测量误差与修正模型研究  

Study on error and correction model of fish length measurement based onimaging sonar

作　　者：彭战飞 沈蔚[1] 张进[1] PENG Zhanfei;SHEN Wei;ZHANG Jin(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306

出　　处：《南方水产科学》2023年第4期31-40,共10页South China Fisheries Science

基　　金：2020年上海海洋大学科技发展专项基金;上海城投原水有限公司项目(D-8006-19-0088)。

摘　　要：成像声呐能在扫描波束范围内进行鱼类映像长度的测定,为提高成像声呐测定鱼类长度的精度,文章利用自适应分辨率成像声呐(Adaptive Resolution Imaging Sonar,ARIS)开展鱼类长度测定实验,依据ARIS扫描波束内鱼类的映像长度和实测长度,分析了ARIS测量鱼类长度的误差。结果表明,鱼类与声呐波束的夹角是导致鱼类长度测量误差的主要因素,夹角越大,鱼类映像长度测量误差越小。在4 m视野内ARIS探测距离对鱼类长度的测量误差无显著交互影响。鱼类映像长度与尾叉长误差更小,其误差均值为2.1 cm。鱼类映像长度与全长和尾叉长的线性关系良好,其线性修正模型拟合度R 2分别为0.9951和0.9905。研究表明,鱼类映像长度使用尾叉长的测量更为有效,同时鱼类与声呐波束的夹角对映像长度的误差分析和声呐映像长度修正模型,可为获取更准确的鱼类长度信息提供参考。Imaging sonar can measure the length of fish images within its scanning beam.To improve the accuracy of imaging sonar's measurement of fish length,we conducted an experiment to determine the fish length by using Adaptive Resolution Imaging Sonar(ARIS).We compared and analyzed the fish length error in acoustic image based on the measured length of a trail fish and the image length at a known position of the ARIS scanning beam.The results indicate that the main influencing factor of fish image length measurement error was the angle between the fish and the sonar beam.As the angle increased,the measurement error of fish length decreased.There was no significant interactive effect of detection distance of ARIS on length measurement error of fish in the 4 M field.The error between the fish image length and the fork length was minimal,with an average error of 2.1 cm.Furthermore,the image length of fish had a good linear relationship with the total length and fork length,and the fitting degree R2 of the linear modified model was 0.9951 and 0.9905,respectively.The study shows that fish image length based on fork measurements is more effective.Additionally,the error analysis of the angle between fish and sonar beam on image length and the sonar image length modified model also provide preliminary references for obtaining more accurate fish length information.

关 键 词：鱼类长度测量 成像声呐 测量误差 修正模型 

分 类 号：S923.4[农业科学—渔业资源]