水产学报2024，Vol.48Issue(12)：72-82,11.DOI:10.11964/jfc.20240714632
基于超声多重散射理论的水产养殖池鱼群计数方法
Fish counting method in aquaculture ponds based on ultrasonic multiple scattering theory
摘要
Abstract
Accurate assessment of the number of organisms in aquaculture ponds is an important requirement in aquaculture.Fish counting methods based on machine vision and near-infrared light can quickly and accurately estimate the biomass in the culture pond under better light environmental conditions,but it is affected by fish over-lap,water turbidity,light,bubbles,and other factors.Fish counting method based on sonar camera and echo sounder can effectively investigate the amount of biological resources in the ocean or lake,but it is limited by the area and water depth of the aquaculture pond in the industrial aquaculture.A time domain interval selection method based on coefficient of variation was proposed to solve the problem of error in the application of ultra-sonic detection in aquaculture ponds with low depth.The ultrasonic transducer with an emission frequency of 40 kHz was used to count the fish in aquaculture ponds in a cylinder with a volume of 0.115 m3.Aiming at the prob-lem of error in the estimation results of ordinary multiple scattering theory,a time-domain interval selection method based on coefficient of variation was proposed.The method was used to estimate the number of 10-40 fishes in the cylinder without and with aeration.The results showed that the MAE was 0.924 and 1.769 fish,RMSE was 1.148 and 2.054,and the CV between estimated and actual values were 0.995 and 0.983,respectively.The results showed that the error was highly correlated with the selection of the time domain interval,and the vari-ation coefficient and the three evaluation indexes kept consistent with the change trend of the time domain interval.By selecting the appropriate time domain interval and increasing the number of measurements,the accuracy of the counting results could be effectively improved.The research showed that the accuracy of aquatic organism count-ing could be effectively improved after increasing the number of samples although there were bubbles in the envir-onment after oxygenation,which leads to a decrease in the accuracy of estimation.The experiment proved that the method was still applicable in the scene with oxygenation demand.This study provides a new path for assessing fish density in low-depth and small-area aquaculture ponds by ultrasonic technology.关键词
水产养殖/渔业声学/鱼群计数/多重散射Key words
aquaculture/fisheries acoustics/fish counting/multiple scattering分类
农业科技引用本文复制引用
李志坚,李俊康,陈雷雷,李俊,胡庆松..基于超声多重散射理论的水产养殖池鱼群计数方法[J].水产学报,2024,48(12):72-82,11.基金项目
上海市水产动物良种创制与绿色养殖协同创新中心项目(2021 科技02-12) Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-culture of Aquaculture animals(2021-KJ-02-12) （2021 科技02-12）
