Analysis of picking characteristics of blueberry by air blowing

Analysis of picking characteristics of blueberry by air blowing | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Analysis of picking characteristics of blueberry by air blowing Yudong Bao, Jingyang Zhang, Yafei Zhao This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4318049/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Aiming at the possible damage to blueberry trees and fruits caused by existing contact vibration picking devices, this study focused on the principle of air blowing picking technology and the flow rate and distance of the air. By applying the theory of fluid mechanics, the attenuation characteristics of free jet in blueberry tree canopy were analyzed, and the related factors affecting the length of jet core region and the attenuation of air velocity in canopy were revealed. A numerical simulation method was used to establish the relationship between the length of the jet core region and the diameter of the outlet, and experimental evidence was verified by the free jet velocity attenuation, the velocity change of the blueberry tree canopy and the gas blowing picking test platform to ensure the accuracy of the numerical simulation results. In this study, fluid-structure coupling numerical simulation under the action of air flow was carried out, and the motion characteristics of the hanging branches and main branches of blueberry under the action of air flow were obtained, and the effective range of air flow parameters for realizing the non-contact shedding of blueberry fruit was preliminarily determined. Finally, this paper successfully completed the picking characteristics and numerical simulation of the air blowing blueberry picking process, and determined that the optimal picking of blueberries can be effectively achieved when the flow rate is 60m/s and the operating distance is between 100mm and 400mm. These research results provide important theoretical guidance and experimental parameters for the design of air-blown blueberry pickers in the future. Blueberry picking Air blowing action Numerical simulation test Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4318049","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":297626345,"identity":"5da4b818-9820-419f-8c64-a063bf358a86","order_by":0,"name":"Yudong Bao","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA9UlEQVRIiWNgGAWjYBACAzDJBsTsPQzMKIKEtfCcAWuRIEGLRA6RWszZDx+T5imzyZOPfHvsc2FbXR0De/M2CYaaOzi1WPakpUnznEsrNrydlzx7ZtthCQaeY2USDMee4XbYgRwzad62w4kbZ+cYM/O2HZAAutBMgrHhMG4t599Atcw8A9JSJ8Eg/4aAlhtQW+ZL8IC0MANt4cGvxXLGs2TLOefSEjfwAB0249xhyTaetGKLhGO4tZjzJx+88abMJnF+O9BhBWV1/Pzshzfe+FCDWwsQsEhAwgHKBcURQwI+DQwMzB9ApHwDflWjYBSMglEwggEASeZN2VgMAtEAAAAASUVORK5CYII=","orcid":"","institution":"Harbin University of Science and Technology","correspondingAuthor":true,"prefix":"","firstName":"Yudong","middleName":"","lastName":"Bao","suffix":""},{"id":297626346,"identity":"fceaaf91-7bcb-4b21-8874-36eb9dfdc183","order_by":1,"name":"Jingyang Zhang","email":"","orcid":"","institution":"Harbin University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Jingyang","middleName":"","lastName":"Zhang","suffix":""},{"id":297626347,"identity":"c3c61534-4610-4a07-8f14-cad5ca7c994a","order_by":2,"name":"Yafei Zhao","email":"","orcid":"","institution":"Harbin University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Yafei","middleName":"","lastName":"Zhao","suffix":""}],"badges":[],"createdAt":"2024-04-24 11:58:41","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4318049/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4318049/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":58303636,"identity":"2e75e9d3-47c0-4f4d-b6f0-49b7c78258a1","added_by":"auto","created_at":"2024-06-13 17:16:47","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2121767,"visible":true,"origin":"","legend":"","description":"","filename":"Analysisofpickingcharacteristicsofblueberrybyairblowing.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4318049/v1_covered_2a09a213-f130-4f47-8c8e-3d3cde28ca8f.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Analysis of picking characteristics of blueberry by air blowing","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Blueberry picking, Air blowing action, Numerical simulation, test","lastPublishedDoi":"10.21203/rs.3.rs-4318049/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4318049/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eAiming at the possible damage to blueberry trees and fruits caused by existing contact vibration picking devices, this study focused on the principle of air blowing picking technology and the flow rate and distance of the air. By applying the theory of fluid mechanics, the attenuation characteristics of free jet in blueberry tree canopy were analyzed, and the related factors affecting the length of jet core region and the attenuation of air velocity in canopy were revealed. A numerical simulation method was used to establish the relationship between the length of the jet core region and the diameter of the outlet, and experimental evidence was verified by the free jet velocity attenuation, the velocity change of the blueberry tree canopy and the gas blowing picking test platform to ensure the accuracy of the numerical simulation results. In this study, fluid-structure coupling numerical simulation under the action of air flow was carried out, and the motion characteristics of the hanging branches and main branches of blueberry under the action of air flow were obtained, and the effective range of air flow parameters for realizing the non-contact shedding of blueberry fruit was preliminarily determined. Finally, this paper successfully completed the picking characteristics and numerical simulation of the air blowing blueberry picking process, and determined that the optimal picking of blueberries can be effectively achieved when the flow rate is 60m/s and the operating distance is between 100mm and 400mm. 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