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Airflow ejection-wrapped clamping type seedling picking method and parameter optimization

Since the current clamp-type and push-out-type seedling picking method brought damage to seedlings, this study aimed to proposed an airflow ejection-wrapped clamping type seedling picking method, which used airflow to eject out seedling and the seedlings were wrapped clamped to reduce the damage of...

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Autores principales: Ma, Guoxin, Chen, Xi, Liu, Yang, Han, Luhua, Mao, Hanping, Hu, Jianping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9878445/
https://www.ncbi.nlm.nih.gov/pubmed/36714786
http://dx.doi.org/10.3389/fpls.2022.1084563
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author Ma, Guoxin
Chen, Xi
Liu, Yang
Han, Luhua
Mao, Hanping
Hu, Jianping
author_facet Ma, Guoxin
Chen, Xi
Liu, Yang
Han, Luhua
Mao, Hanping
Hu, Jianping
author_sort Ma, Guoxin
collection PubMed
description Since the current clamp-type and push-out-type seedling picking method brought damage to seedlings, this study aimed to proposed an airflow ejection-wrapped clamping type seedling picking method, which used airflow to eject out seedling and the seedlings were wrapped clamped to reduce the damage of seedlings during seedling picking process. The parameter model was established through theoretical design, then the parameters were optimized through coupling simulation analysis, and the validity of these parameters was verified through experiments. We found that the diameter of the airflow nozzle was selected as 3.5 mm to match with the drainage outlet of the plug tray, and the airflow pressure which could eject out seedlings was calculated as 0.146 Mpa~0.315 Mpa on the basis of gas jet dynamic. The fluid-solid coupling simulation of airflow ejection in Comsol proposed that the seedlings could be ejected out under the airflow pressure was equal to or greater than 0.4 Mpa, and the airflow should be maintained for about 0.3 s to ensure the posture of the seedlings ejected out for better seedling clamping. The further fluid-discrete body simulation of airflow ejection by using Fluent-Edem coupling method indicated that the seedling was damaged under airflow pressure of 0.5 MPa, so the airflow pressure should be set as 0.4 MPa during seedling ejection process. Besides, a wrapped clamping type effector which clamped the seedlings from all sides in the form of flexible package was also designed to match with the airflow ejection method, and the RecurDyn-Edem coupling simulation showed that the end-effector could tightly clamp the seedling without damage when the angle between the clamping slices and the vertical direction was 8.5°. Finally, the airflow ejection-wrapped clamping type seedling picking device was manufactured, and the verification tests verified the simulation results. This research can provide some references for the automatic seedling picking technology.
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spelling pubmed-98784452023-01-27 Airflow ejection-wrapped clamping type seedling picking method and parameter optimization Ma, Guoxin Chen, Xi Liu, Yang Han, Luhua Mao, Hanping Hu, Jianping Front Plant Sci Plant Science Since the current clamp-type and push-out-type seedling picking method brought damage to seedlings, this study aimed to proposed an airflow ejection-wrapped clamping type seedling picking method, which used airflow to eject out seedling and the seedlings were wrapped clamped to reduce the damage of seedlings during seedling picking process. The parameter model was established through theoretical design, then the parameters were optimized through coupling simulation analysis, and the validity of these parameters was verified through experiments. We found that the diameter of the airflow nozzle was selected as 3.5 mm to match with the drainage outlet of the plug tray, and the airflow pressure which could eject out seedlings was calculated as 0.146 Mpa~0.315 Mpa on the basis of gas jet dynamic. The fluid-solid coupling simulation of airflow ejection in Comsol proposed that the seedlings could be ejected out under the airflow pressure was equal to or greater than 0.4 Mpa, and the airflow should be maintained for about 0.3 s to ensure the posture of the seedlings ejected out for better seedling clamping. The further fluid-discrete body simulation of airflow ejection by using Fluent-Edem coupling method indicated that the seedling was damaged under airflow pressure of 0.5 MPa, so the airflow pressure should be set as 0.4 MPa during seedling ejection process. Besides, a wrapped clamping type effector which clamped the seedlings from all sides in the form of flexible package was also designed to match with the airflow ejection method, and the RecurDyn-Edem coupling simulation showed that the end-effector could tightly clamp the seedling without damage when the angle between the clamping slices and the vertical direction was 8.5°. Finally, the airflow ejection-wrapped clamping type seedling picking device was manufactured, and the verification tests verified the simulation results. This research can provide some references for the automatic seedling picking technology. Frontiers Media S.A. 2023-01-12 /pmc/articles/PMC9878445/ /pubmed/36714786 http://dx.doi.org/10.3389/fpls.2022.1084563 Text en Copyright © 2023 Ma, Chen, Liu, Han, Mao and Hu https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Ma, Guoxin
Chen, Xi
Liu, Yang
Han, Luhua
Mao, Hanping
Hu, Jianping
Airflow ejection-wrapped clamping type seedling picking method and parameter optimization
title Airflow ejection-wrapped clamping type seedling picking method and parameter optimization
title_full Airflow ejection-wrapped clamping type seedling picking method and parameter optimization
title_fullStr Airflow ejection-wrapped clamping type seedling picking method and parameter optimization
title_full_unstemmed Airflow ejection-wrapped clamping type seedling picking method and parameter optimization
title_short Airflow ejection-wrapped clamping type seedling picking method and parameter optimization
title_sort airflow ejection-wrapped clamping type seedling picking method and parameter optimization
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9878445/
https://www.ncbi.nlm.nih.gov/pubmed/36714786
http://dx.doi.org/10.3389/fpls.2022.1084563
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