摘要
针对对虾前处理的定向环节依赖人工操作、未实现自动化作业的问题,以南美白对虾为研究对象,提出了一种分流式腹背定向方法。该定向方法基于对虾腹背轮廓曲线斜率差异的特征判断腹背朝向,然后通过分选的方式实现腹部朝前和背部朝前两类对虾的分流,达到腹背定向的目的。理论分析表明,采用双行光电检测的方法可以判断对虾的腹背朝向,通过控制对虾的输送间隙可以分选对虾,最终实现对虾的腹背分流定向。根据腹背定向方法,设计了对虾腹背定向系统,完成了系统的硬件搭建与软件开发。系统硬件主要由光电对射传感器、输入输出模块、计算机和分流机构组成。试验结果表明,针对大型规格和中型规格对虾,定向系统的平均检测正确率分别为96.9%和98.8%,定向系统的平均定向成功率分别为95.4%和97.5%。
Due to the irregular shape of shrimp,the automatic orientation is difficult.In order to solve the problem that the orientation link of shrimp pretreatment still relies on manual operation and does not realize automatic operation,taking Penaeus vannamei as the research object,a shunting orientation method of abdomen and back for deheading shrimp was proposed.This method was a directional way of detection before sorting.In principle,it was different from the orientation method relying on friction and gravity.According to the principle that there were differences in the slope of the abdominal and dorsal curve of shrimp,the shunting orientation method of abdomen and back detected the ventral and dorsal orientation.Then the shrimp with different ventral and dorsal orientations were selected to achieve the same ventral and dorsal orientations.Theoretical analysis showed that the two-line photoelectric sensing method can be used to judge the ventral and dorsal orientation of shrimp.By controlling the transportation gap of shrimp,shrimp can be sorted,and finally the orientation of the abdomen and back of shrimp can be realized.According to the orientation method of abdomen and back for shrimp,the orientation system of abdomen and back for shrimp was designed,and the hardware construction and software development of the system were completed.The hardware of the system was mainly composed of photoelectric sensor,input and output module,computer and shunt mechanism.The test results of the detection accuracy and the orientation success rate showed that the average detection accuracy of large shrimp was 96.9%and the average detection accuracy of medium shrimp was 98.8%.And the average orientation success rate of large shrimp was 95.4%and the average orientation success rate of medium shrimp was 97.5%.
作者
熊师
李璐
董鑫
李阳
方宪法
王德成
XIONG Shi;LI Lu;DONG Xin;LI Yang;FANG Xianfa;WANG Decheng(College of Engineering,China Agricultural University,Beijing 100083,China;State Key Laboratory of Soil Plant Machine System Technology,Chinese Academy of Agricultural Mechanization Sciences,Beijing 100083,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2021年第S01期449-456,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点研发计划项目(2018YFD0700904、2019YFD0901801)
关键词
对虾
定向方法
定向系统
检测正确率
定向成功率
shrimp
orientation method
orientation system
detection accuracy
orientation success rate
