Page 230 - 《水产学报》2025年第11期

李鹏鹏，等 水产学报, 2025, 49(11): 119618

Design and experiment of shellfish seeding device with
variable control in mudflat

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LI Pengpeng , QIAN Yuxing , GAO Min , WANG Mingyu , WANG Xinyi , MU Gang 1,2,3 ,
LI Xiuchen 1,2,3 , ZHANG Hanbing 1,2,3*
1. School of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116000, China;
2. Liaoning Provincial Marine Fishery Equipment Professional Technology Innovation Center,
Dalian Ocean University, Dalian 116000, China;
3. Key Laboratory of Facility Fisheries, Ministry of Education, Dalian Ocean University, Dalian 116000, China

Abstract: A microcontroller-based variable seeding control device was created based on a cone disk centrifugal shellfish seed-
ing device to improve the survival and utilization rate of shellfish seedlings and satisfy the need for density changes in shellfish
farming with various substrates. Created a feedback system using an STC89C51 microcontroller, design essential parts such as
an actuator, feeding device, and variable control system, and implemented a precise variable seeding plan into action. We con-
ducted a three-factor, three-level orthogonal test, with seedling dropping rate, impeller disc speed, and travel speed as influen-
cing factors, and the coefficient of variation of seedling distribution uniformity and the relative error of seedling sowing amount
as evaluation indicators. The findings demonstrated that the rotating speed was the primary factor influencing the coefficient of
variation, while the dropping rate was the primary element influencing the relative error of the seedling sowing rate. A drop-
ping rate of 0.8 kg/s, an impeller disc speed of 800 r/min, and a travel speed of 0.77 m/s were the ideal parameter combinations.
At this point, the relative inaccuracy of the seedling sowing rate was 9.23%, and the coefficient of variation was 11.07%. We
conducted the mudflat test. The mean relative error of the seeding quantity was 9.29%, and the mean error of the coefficient of
variation was 9.36% when compared to the performance test. In addition to meeting the requirements for seeding precision and
uniformity, the cone disk centrifugal variable seeding device proposed in this study demonstrated enhanced performance and
offers a theoretical foundation for mechanical variable seeding of shellfish.
Key words: shellfish; seeding; centrifugal turntable; variable control; discrete element simulation; coefficient of distribution
variation
Corresponding author: ZHANG Hanbing. E-mail: zhanghanbing@dlou.edu.cn
Funding projects: National Key Research and Development Program of China (2023YFD2400800); Liaoning Provincial
Department of Education Project (LJKMZ20221112)

https://www.china-fishery.cn 中国水产学会主办 sponsored by China Society of Fisheries
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