GEJIMA Yoshinori

写真a

Affiliation

Faculty of Agriculture Department of Agricultural and Environmental Sciences

Title

Associate Professor

External Link

Degree 【 display / non-display

  • Doctor (Agriculture) ( 1993.3   Kagoshima University )

  • Master of Agriculture ( 1988.3   University of Miyazaki )

  • Bachelor of Agriculture ( 1986.3   University of Miyazaki )

Research Areas 【 display / non-display

  • Environmental Science/Agriculture Science / Agricultural environmental engineering and agricultural information engineering

  • Environmental Science/Agriculture Science / Agricultural environmental engineering and agricultural information engineering

 

Papers 【 display / non-display

  • Design and simulation of an integrated end-effector for picking kiwifruit by robot Reviewed

    Mu L., Cui G., Liu Y., Cui Y., Fu L., Gejima Y.

    Information Processing in Agriculture   2020.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Information Processing in Agriculture  

    © 2019 China Agricultural University The harvesting of fresh kiwifruit is a labor-intensive operation that accounts for more than 25% of annual production costs. Mechanized harvesting technologies are thus being developed to reduce labor requirements for harvesting kiwifruit. To improve the efficiency of a harvesting robot for picking kiwifruit, we designed an end-effector, which we report herein along with the results of tests to verify its operation. By using the established method of automated picking discussed in the literature and which is based on the characteristics of kiwifruit, we propose an automated method to pick kiwifruit that consists of separating the fruit from its stem on the tree. This method is experimentally verified by using it to pick clustered kiwifruit in a scaffolding canopy cultivation. In the experiment, the end-effector approaches a fruit from below and then envelops and grabs it with two bionic fingers. The fingers are then bent to separate the fruit from its stem. The grabbing, picking, and unloading processes are integrated, with automated picking and unloading performed using a connecting rod linkage following a trajectory model. The trajectory was analyzed and validated by using a simulation implemented in the software Automatic Dynamic Analysis of Mechanical Systems (ADAMS). In addition, a prototype of an end-effector was constructed, and its bionic fingers were equipped with fiber sensors to detect the best position for grabbing the kiwifruit and pressure sensors to ensure that the damage threshold was respected while picking. Tolerances for size and shape were incorporated by following a trajectory groove from grabbing and picking to unloading. The end-effector separates clustered kiwifruit and automatically grabs individual fruits. It takes on average 4–5 s to pick a single fruit, with a successful picking rate of 94.2% in an orchard test featuring 240 samples. This study shows the grabbing–picking–unloading robotic end-effector has significant potential to facilitate the harvesting of kiwifruit.

    DOI: 10.1016/j.inpa.2019.05.004

    Scopus

  • A Threading Method for Removal of the Secondary Roots of Sweet Ptatoes Reviewed

    Journal of the Japanese Society of Agricultural Machinery and Food Engineers   81 ( 3 )   177 - 182   2019.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Mechanized technologies for scaffolding cultivation in the kiwifruit industry: A review Reviewed

    Mu L., Liu H., Cui Y., Fu L., Gejima Y.

    Information Processing in Agriculture   5 ( 4 )   401 - 410   2018.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Information Processing in Agriculture  

    © 2018 The success of organic and green agricultural fruit production depends on quality and cost. As the kiwifruit industry becomes ever more commercialized, it is in the interests of the industry to mechanize production, which can promote industrialization and improve industrial value and market prospects. Currently, New Zealand, Italy, Chile, and China carry out research into the mechanism of kiwifruit production. This review describes in detail the current state of the art of pollination, harvesting and grading equipment, including detection and identification, non-destructive end effector, harvesting robots and grading devices. Process technologies that include artificial pollination, harvest mechanization, grading and standardization of production problems are analysed and compared. These problems directly affect the quality of kiwifruit products. Finally, to solve the various problems that the kiwifruit industry experiences, it is necessary to accelerate the development of mechanized kiwifruit production, realize the mechanization of information acquisition and standardization in order to advance precision agriculture and agricultural wisdom for the future. Mechanization of the kiwifruit industry must adapt to adjustments in how China's economic structure develops.

    DOI: 10.1016/j.inpa.2018.07.005

    Scopus

  • Design of end-effector for kiwifruit harvesting robot experiment

    Mu Longtao ; Liu Yadong; Cui Yongjie; Liu Haibin; Chen Lipeng; Fu Longsheng; Gejima, Yoshinori

    2017 ASABE Annual International Meeting   2017.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:2017 ASABE Annual International Meeting  

    To separate kiwifruits and realize nondestructive picking and unloading of clustered kiwifruits in scaffolding cultivation, an end-effector with a "grabbing-picking-sliding" harvesting method and automatic picking and unloading connecting rod linkage following its trajectory model is presented based on the research on manual picking methods, the fruits growth and their physical properties. Kiwifruit position are detected by optic fiber sensors, clamping force detected by pressure sensors, shape and size of bionic picking fingers set thereby and an integration harvesting prototype following trajectory model from grabbing, picking to unloading designed and evaluated in the lab and orchard. The evaluation test showed that the end-effector of the prototype with optic fiber sensors on the fingers to detect the best position for grabbing, the pressure sensors to guarantee a nondestructive picking within damage threshold and adjusting spring for fruits size and shape tolerance, can integratedly grab and separate adjacent or clustered kiwifruits, then pick and unload individual fruit without destruction.

    DOI: 10.13031/aim.201700666

    Scopus

  • Kiwifruit recognition at nighttime using artificial lighting based on machine vision Reviewed

    Fu Longsheng, Wang Bin, Cui Yongjie, Su Shuai, Yoshinori Gejima, Taiichi Kobayashi

    International Journal of Agricultural and Biological Engineering   8 ( 4 )   52 - 59   2015.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Journal of Agricultural and Biological Engineering  

    © 2015, Chinese Society of Agricultural Engineering. All rights reserved. Most researches involved so far in kiwifruit harvesting robot suggest the scenario of harvesting in daytime for taking advantage of sunlight. A robot operating at nighttime can overcome the problem of low work efficiency and would help to minimize fruit damage. In addition, artificial lights can be used to ensure constant illumination instead of the variable natural sunlight for image capturing. This paper aims to study the kiwifruit recognition at nighttime using artificial lighting based on machine vision. Firstly, an RGB camera was placed underneath the canopy so that clusters of kiwifruits could be included in the images. Next, the images were segmented using an R-G color model. Finally, a group of image processing conventional methods, such as Canny operator were applied to detect the fruits. The image processing results showed that this capturing method could reduce the background noise and overcome any target overlapping. The experimental results showed that the optimal artificial lighting ranged approximately between 30-50 lx. The developed algorithm detected 88.3% of the fruits successfully.

    DOI: 10.3965/j.ijabe.20150804.1576

    Scopus

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MISC 【 display / non-display

  • L*a*b*表色系を用いたトマトの熟度判別に関する研究(共著,英文)

    槐島 芳徳

    Proceedings of the 2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics   1355-1359   2003

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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  • Study on image processing for quality estimation of strawberries (Part 2) – Detection of bruises on fruit by NIR image processing –

    Journal of Society of High Technology in Agriculture   14巻1号,1-9 ( 1 )   1 - 9   2002

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

    DOI: 10.2525/jshita.14.1

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  • 可視光と近赤外光の画像を用いたイチゴの品質評価に関する研究(共著,英文)

    槐島 芳徳

    Proceedings of 3rd IFAC/CIGR Workshop on Control Applications in Post-Harvest and Processing Technology 232-237   232-237   2001

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  • 農用トラクタエンジンの排出ガス濃度・排出量分布図の作成(共著)

    槐島 芳徳

    農業機械学会九州支部誌   50,1-5   2001

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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  • 釜炒り茶用炒り葉機の性能評価に関する基礎研究(共著)

    槐島 芳徳

    農業機械学九州支部誌   50,61-65   2001

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Presentations 【 display / non-display

  • 開発した加工用ニンジンの茎葉部切断機の実証実験

    日吉健二・小林太一・下宮大弥・槐島芳徳

    第75回九州農業食料工学会例会  2021.12.7 

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    Event date: 2021.12.7 - 2021.12.8

    Language:Japanese   Presentation type:Oral presentation (general)  

  • シリコンを用いたこぎ摘みロール茶葉収穫機構の開発

    槐島芳徳,日吉健二,小林太一

    第74回農業食料工学会九州支部例会  (Web)  農業食料工学会九州支部

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    Event date: 2020.9.17 - 2020.9.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Web  

    茶の収穫機構としてシリコンを用いたこぎ摘みロールを開発しその性能試験の概要を報告した.

  • スマート農業実証プロジェクト・ (株)ジェイエイフーズみやざきの取組み

    槐島芳徳

    日本生物環境工学会九州支部  (福岡県久留米市)  日本生物環境工学会九州支部

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    Event date: 2019.11.29 - 2019.11.30

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:福岡県久留米市  

  • Kinectセンサを用いたトマトの乾燥ストレス計測

    大鶴智美,槐島芳徳,日吉健二,小林太一

    日本生物環境工学会九州支部2019年久留米大会  (福岡県久留米市)  日本生物環境工学会九州支部

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    Event date: 2019.11.29 - 2019.11.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:福岡県久留米市  

  • 収穫機構を開発するための茶芽の物理性計測

    光永渚,槐島芳徳,日吉健二,小林太一

    日本生物環境工学会九州支部2019年久留米大会  (福岡県久留米市)  日本生物環境工学会九州支部

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    Event date: 2019.11.29 - 2019.11.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:福岡県久留米市  

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Awards 【 display / non-display

  • 農業食料工学会九州支部賞

    2017.9   農業食料工学会九州支部   茶の高品質生産システムの開発に関する研究

    槐島芳徳

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • 日本生物環境工学会貢献賞

    2016.9   日本生物環境工学会   生物環境工学に関する学術交流活動および九州支部運営における貢献

    槐島芳徳

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • Information and Electrical Technologies Dibision Meeting Paper Award

    2004.7   American Society of Agricultural Engineers  

    Masateru Nagata, Jasper Tallada, Taichi Kobayashi, Yongjie Cui, Yoshinori Gejima

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    Award type:Award from international society, conference, symposium, etc.  Country:United States

Grant-in-Aid for Scientific Research 【 display / non-display

  • 高品質茶収穫システムの開発に関する研究

    2016.04 - 2019.03

    科学研究費補助金  基盤研究(C)

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    Authorship:Principal investigator 

    本研究は,茶葉の機械収穫機構と摘採適期判断システムを開発して高品質な茶葉収穫技術を確立するものである.

  • 高性能ベルトコンベア型炒り葉機の開発に関する研究

    2006.04 - 2009.03

    科学研究費補助金  基盤研究(C)

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    九州の特産品である釜炒り茶の生産性を向上するため,高性能ベルトコンベア型炒り葉機を開発する.本機は,円筒釜や固定釜を使った炒り葉方式に替わり,ベルトコンベア(送帯式)による新たな炒り葉方式を構築するものである.さらに,本機によって加工される茶葉の状態を画像処理システムを用いて把握し,高品質な釜炒り茶の製造条件を見出す炒り葉評価システムを付加する.これにより,釜炒り茶の生産体系を近代化して,中山間地を中心に展開する釜炒り茶の生産性を向上し,茶農家の収益増を目指す.

  • 釜炒り茶における炒り葉機の開発に関する基礎的研究

    1998.04 - 2000.03

    科学研究費補助金  若手研究(A)

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    釜炒り茶の品質を最も左右する新たな炒り葉機の開発を行った。茶葉を効率的に乾燥させるために,茶葉の中心部から水分を移動させる揉みの作用と上下から挟み込む伝熱方法とを組み合わせた回分式および連続式の炒り葉機を試作した。各機を使用した性能実験の結果,回分式では良質な茶葉を炒ることができるな蒸気排気口面積を見出すことができた。しかし連続式炒り葉機では,上方から茶葉を供給する際に投入量が安定しなかったことが原因で炒りの過不足が生じ,品質の低下を招いた。

  • 高温・高圧スチームを用いた除草機の開発に関する基礎研究

    1995.04 - 1996.03

    科学研究費補助金  若手研究(A)

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    Authorship:Principal investigator 

    雑草の根に高温高圧の蒸気を噴射して枯死させる除草機の開発に関する基礎研究を行った。このため,除草用灯油バーナーを火力源とした容量20リットルの蒸気発生タンクおよび蒸気を土中に導くノズルを製作し,圃場の中を移動できる台車に搭載した除草機を製作した。実験の結果,高圧蒸気による土壌の飛散が顕著であること,さらに土中での蒸気温度が70℃程度しか達せず,当初の目的に達しないことがわかった。

  • 釜炒り茶における炒り葉評価システムの開発に関する研究

    1993.04 - 1994.03

    科学研究費補助金  若手研究(A)

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    釜炒り茶の加工精度を評価するため,茶葉の画像をフラットベッド型イメージスキャナで取得して,コンピュータで解析する炒り葉評価システムをVisual Cで自作したソフトウェアで構築した。本システムを用いて解析を行った結果,炒り葉における乾燥の度合いを表す減水率が増加するのに伴ってRGB表色系のBlueの変化が大きいこと,最適減水率38~45%時のBlueの輝度平均値を得ることができた。