Papers - HIYOSHI Kenji
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Application of particle image velocimetry for grain tank of combine harvester during rice discharge
Ango Inoue, Kenji Hiyoshi, Keishiro Nagano, Yoshinori Gejima, Taichi Kobayashi
Proceedings of The 11th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB 2024) 2024.9
Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
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Myoi Yuki, Fukumoto Taishin, Tasumi Masahiro, Hiyoshi Kenji, Inagaki Hitone
Journal of Rainwater Catchment Systems 30 ( 1 ) 15 - 23 2024.6
Language：Japanese Publishing type：Research paper (scientific journal)
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Myoi Yuki, Fukumoto Taishin, Tasumi Masahiro, Hiyoshi Kenji, Inagaki Hitone
Journal of Rainwater Catchment Systems 29 ( 2 ) 53 - 61 2024.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Friction Loss Evaluation by Coupling Hazen-Williams and Colebrook Equations (I) Reviewed
Inagaki Hitone, Hiyoshi Kenji
Journal of Rainwater Catchment Systems 29 ( 1 ) 9 - 18 2023.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Friction Loss Evaluation by Coupling Hazen-Williams and Colebrook Equations (II) Reviewed
Inagaki Hitone, Hiyoshi Kenji
Journal of Rainwater Catchment Systems 29 ( 1 ) 19 - 27 2023.7
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Re-evaluation of Hazen-Williams Coefficient C of Pipeline (III) Reviewed
Inagaki Hitone, Hiyoshi Kenji
Journal of Rainwater Catchment Systems 27 ( 2 ) 51 - 57 2022.11
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Re-evaluation of Hazen-Williams Coefficient C of Pipeline (II) Reviewed
Inagaki Hitone, Hiyoshi Kenji
Journal of Rainwater Catchment Systems 27 ( 2 ) 51 - 57 2022.1
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Re-evaluation of Hazen-Williams Coefficient C of Pipeline (I) Reviewed
Inagaki Hitone, Hiyoshi Kenji
Journal of Rainwater Catchment Systems 27 ( 2 ) 43 - 49 2022.1
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Development of a High-Performance Levee Mower Reviewed
E.KURIHARA, K.YAMASHITA, J.NISHIKAWA, K.HAYASHI, T.TODA, H.TAMURA, T.KOBAYASHI, K.HIYOSHI
Journal of the Japanese Society of Agricultural Machinery and Food Engineering 82 ( 4 ) 400 - 411 2020.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Agricultural Machinery and Food Engineers
In this study, we developed a high-performance levee mower. The developed levee mower can be equipped with a stable running device and can automatically run along a levee. The developed mower is an electromotive-type device with a remote-control operation. The device is adaptable to both levees and slopes. From the field test results, the work efficiency of the developed levee mower was 151.0 min/10 a when used on levees and 99.1 min/10 a when used on slopes. By operating the remote control unit, the heavy workload was reduced, and the noise, exhaust gas emission, and vibration were less pronounced when compared with those of mowers available in the market. Therefore, the mowing surroundings of the operator improved significantly.
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Inagaki Hitone, Hiyoshi Kenji
Journal of Rainwater Catchment Systems 26 ( 1 ) 25 - 32 2020.7
Language：Japanese Publishing type：Research paper (scientific journal)
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A Threading Method for the Removal of the Secondary Roots of Sweet Potatoes Reviewed
Kenji HIOYOSHI, Misaki MAEDA, Taichi KOBAYASHI, Yoshinori GEJIMA
Journal of the Japanese Society of Agricultural Machinery and Food Engineering 81 ( 3 ) 177 - 182 2019.5
Language：Japanese Publishing type：Research paper (scientific journal)
Because the skin of sweet potatoes is relatively delicate and easily scratched, farmers manually remove the secondary roots instead of employing a machine to prepare the tuberous roots before shipment. Thus, this study focuses on the development of a threading method, which uses cotton kite string as threads, for the removal of secondary roots of sweet potatoes. The threading mechanism entails twisting the secondary roots at the intersection of two crossing threads. The results of root drawing resistance measurements were 2.68-N average and 9.94-N maximum; additionally, the minimum drawing force was required as 10 N. Lastly, the maximum pulling force was found to be approximately 40 N; it was also confirmed that the pulling force and thread thickness had a directly proportional relationship.
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Study on utility improvement of air-assisted electrostatic sprayer Reviewed
Jounal of the Japanese Society of Agricultural Machinery and Food Engineers 79 ( 2 ) 169 - 178 2017.3
Language：Japanese Publishing type：Research paper (scientific journal)
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畑地灌漑用施設を活用したマイクロ水力発電と小水力エネルギーを利用した灌漑装置についての研究 Reviewed
竹下伸一、日吉健二、稲垣仁根、秋吉康弘
畑地農業 ( 667 ) 17 - 23 2014.6
Language：Japanese Publishing type：Research paper (scientific journal)
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小型水車を用いたエアレーション装置の開発 Invited Reviewed
日吉健二
日本フルードパワーシステム学会誌 45 ( 3 ) 107 - 109 2014.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Study on cartesian-type strawberry-harvesting robot
Cui Y., Gejima Y., Kobayashi T., Hiyoshi K., Nagata M.
Sensor Letters 11 ( 6-7 ) 1223 - 1228 2013.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Sensor Letters
Harvesting strawberries requires high labor costs and long working hours. In order to reduce the labor burden in agriculture, robotic automation is very much desired. Especially, there is a strong demand for the automated harvesting and grading of ripe and soft strawberries, as such takes tend to take long working hours and requires special attention not to damage the fruits. A Cartesiantype strawberry-harvesting robot was developed for in-row hilltop culture. The robot consists of two color cameras (wide-view and detail cameras), a harvesting hand, a fiber-optic sensor and a mobile control unit. The robot can detect the fruit, evaluate its ripeness and pick strawberries by cutting its peduncles. Experimental performance tests showed that the robot could accurately detect the fruits (93.6% efficiency) and harvest samples with more than 50% ripeness level. Some difficulty was observed in accurately detecting the fruit peduncles (70.8% efficiency), Execution time for successfully harvesting a single fruit was about 16.6 s. The result of the testing indicated the potential of harvesting robot with a harvesting hand as well as automatic harvesting algorithm function. Copyright © 2013 American Scientific Publishers.
DOI： 10.1166/sl.2013.2949
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A Study on a weeding robot without herbicide - Comparison with two methods for sdistinguish between the seedlings and the soil surface - Reviewed
( 61 ) 7 - 12 2012.8
Language：Japanese Publishing type：Research paper (scientific journal)
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Takahashi Kenji, Inagaki Hitone, Nakazano Takefumi, Hiyoshi Kenji
Journal of Rainwater Catchment Systems 18 ( 1 ) 35 - 43 2012
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Rainwater Catchment Systems Association
An traditional pipeline system for water pumping and conveyance has designed to include a flywheel and other facilities for suppressing negative pressure to a depth of 7 m or below in order to prevent water column separation. If the occurrence point of water column separation and the influence of the separation on the pipeline can be accurately identified, an optimal design can be adopted for each pipeline, which permits water column separation to occur without inflicting damage. Field experiments were conducted for evaluating water column separation during a pump power failure and the resulting water hammer pressure caused by recombination of the columns. The effect of implementing a general-purpose check valve or the non-water hammer pressure check valve was investigated. When restarting a pump after a sudden stop, it was found that a pressure rise can be suppressed by opening the bypass valve of the non-water hammer check valve. In addition, it was found that using an independent air choke valve to draw in air during times of negative pressure prevented the spread of the negative-pressure region and thus suppressed water column separation. The field experiments revealed that safety of pipeline is ensured by preventing recombination of the separated water columns, at the regions where water column separation is generated by the negative pressure.
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A Study on Micor Hydroturbine for Low Head Power - Performance of Power by the Low-Cost Type Runners - Reviewed
( 58 ) 1 - 4 2009.8
Language：Japanese Publishing type：Research paper (scientific journal)
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Working Curve for Reduction of Exhaust Emissions from an Agricultural Tractor Engine
HIYOSHI Kenji, SEKI Ei, OCHIAI Yoshiji, TAKAHASHI Hiroyuki, FURUYAMA Takashi, ENDOH Jun, GEJIMA Yoshinori
Journal of the Japanese Society of Agricultural Machinery 71 ( 1 ) 108 - 117 2009.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
The contour lines of emission gas maps and power take off (PTO) power performance curves for a variety of exhaust types were used to express the discharge characteristics the tractor exhausts. The gasses investigated were Bosch smoke, nitrogen oxide (NO<SUB>x</SUB>), carbon monoxide (CO), and total hydrocarbons (THC). The discharge characteristics associated with the operating range of the engine were expressed in three dimensions. Using these maps, general discharge performance values for each exhaust were calculated by combining fuel consumption and the discharge characteristics. In addition, working curves for the reduction of exhaust emissions were developed. It is proposed that running an engine on such a working curve reduces exhaust emissions.
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軽石を用いたDPF (ディーゼル微粒子除去フィルタ) の開発:軽石の粒径と排気煙濃度について
日吉 健二, 池田 茂貴, 槐島 芳徳, 永田 雅輝
農業機械学会誌 70 ( 0 ) 373 - 374 2008
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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Study on Strawberry Harvesting Bobot Using Machine Vision for Strawberry Grown on Annual Hill Top (Part 2) Reviewed
Journal of the Japanese Society of Agricultural Machinery 69 ( 2 ) 60 - 68 2007.3
Language：Japanese Publishing type：Research paper (scientific journal)
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CUI Yongjie, NAGATA Masateru, GUO Feng, HIYOSHI Kenji, KINOSHITA Osamu, MITARAI Masafumi
Journal of JSAM 69 ( 2 ) 60 - 68 2007.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
This paper was carried on a strawberry harvesting robot which can precisely harvest the fruit without damage through cutting and holding the peduncle for strawberries grown on annual hill tops. This second study proposed an image processing method for the ripeness judgment of fruits and the recognition of the peduncle, and described the fabrication of the picking hand. The ripeness judgment of fruits was based on the fruit's coloring rate to determine their proper harvesting timing. The peduncle recognition involves extraction of the display line of peduncle, as well as determination of its cutting position and direction angle. Results confirmed that the harvestable fruits having at least 50 to 60% coloring were able to be determined, while the cutting position and direction angle of the peduncles can be obtained. From the information provided by the image processing method, the picking hand's ability to cut and hold the harvestable fruits through their peduncle was confirmed.
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積 栄, 日吉 健二
農業機械學會誌 67 ( 3 ) 2005.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Judging of tomato maturity by utilizing a low-resolution RGB color system
Gejima Y., Nagata M., Kenji H.
ASAE Annual International Meeting 2004 7045 - 7053 2004.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ASAE Annual International Meeting 2004
On the image processing of personal computer, the RGB color system has the most closely index color map (16.77 million index, 24bit) compared to the other (L*a*b* or HSV etc.) color system. Therefore RGB index values are used in the other color system formula. This study determines a method for higher accuracy judgment by the RGB color system for the index color of tomato maturity. The correlation coefficient between the relationship of tomato maturity and the histogram in 24bit color index map in RGB color system was 0.6202, when it was showed under the index of R=141, G=60 and B=50. The judgment accuracy for using this linear formula was about 50%. Then, when the percentile of histogram of tomato area was used, the correlation coefficient was increased to 0.6225. This reason was affected by the size of tomato. Moreover, we thought that the RGB 24bit color map was too much, thus a lower bit color map was used this analysis. The highest correlation coefficient was obtained 0.9202 in 64 colors(12bit). This result was clearly showed that the group color is better than mono color. Therefore, other color system which has lower color map, were compared to a 15bit color index map on the RGB color system.
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イチゴ収穫ロボット開発のための遠撮カメラによる:イチゴ果実の画像および位置認識
永田 雅輝, 崔 永杰, 小林 太一, タラダ ジャスパ, 日吉 健二, 槐島 芳徳
農業機械学会誌 66 ( 0 ) 89 - 90 2004
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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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 (第4報):市販の連続式炒り葉機における解析
槐島 芳徳, 永田 雅輝, 日吉 健二, 藤田 進, 松尾 啓史
農業機械学会誌 66 ( 0 ) 211 - 212 2004
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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農用トラクタの実作業における排出ガスの実態に関する研究（第1報）圃場作業の再現運転による排出ガス質量の推定と実態調査 Reviewed
積 栄，落合良治，髙橋弘行，古山隆司，日吉健二
農業機械学会誌 65 ( 6 ) 120 - 126 2003.11
Language：Japanese Publishing type：Research paper (scientific journal)
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農用トラクタの実作業における排出ガスの実態に関する研究（第2報）作業方法による排出ガスの低減法の検討 Reviewed
積 栄，落合良治，髙橋弘行，古山隆司，日吉健二，遠藤 準
農業機械学会誌 65 ( 6 ) 127 - 133 2003.11
Language：Japanese Publishing type：Research paper (scientific journal)
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SEKI Ei, OCHIAI Yoshiji, TAKAHASHI Hiroyuki, FURUYAMA Takashi, HIYOSHI Kenji
Journal of JSAM 65 ( 6 ) 120 - 126 2003.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
The solution for the problem of exhaust gas from diesel engines has become more important these days, and some improvement is to be needed also on agricultural machineries. Therefore it is important to observe the actual situation of the exhaust gas amount of agricultural tractors on field work. On this report, rotary tillage was considered, which is the most popular work in Japan. To obtain the amount of exhaust gas, PTO Load on rotary tillage was recorded and reproduced with the PTO performance test system in the laboratory. PTO load and PTO speed were correctly reproduced on this system, and the tendency of the results of exhaust gas density by the system was the same as the real ones on the field, which means the reproduction of PTO load by the system is proper from the view of exhaust gas. By the reproduction, the exhaust gas amount of tractors was investigated on rotary tillage, and it supposed that the amount of exhaust gas per kWh varies with various required PTO power.
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SEKI Ei, OCHIAI Yoshiji, TAKAHASHI Hiroyuki, FURUYAMA Takashi, HIYOSHI Kenji, ENDOH Jun
Journal of JSAM 65 ( 6 ) 127 - 133 2003.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
The exhaust gas amount of tractors on rotary tillage has been estimated by means of the reproduction method of the actual work on the report part 1 to observe the situation of the exhaust gas on actual field work. On this report, the relation between the exhaust gas amount and the condition on field work, such as PTO load and engine speed was investigated. To understand the relation, the amount of exhaust gas from the actual rotary tillage with various traveling speed and engine speed was estimated, and the changes of estimated C1 mode test results (which represents the amount of exhaust gas from general work of non-road engine) by varying PTO load and engine speed was also considered. As a result, it was made clear that every tractor has its own tendency of changing the amount of exhaust gas by varying PTO load and engine speed, and it seemed possible to decrease each exhaust gas component by considering the tendency and selecting the suitable PTO load and engine speed.
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精密除草システムのための基礎的研究:画像によるニンジンの作物列検出について
日吉 健二, 高橋 由浩, 槐島 芳徳, 永田 雅輝
農業機械学会誌 65 ( 0 ) 13 - 14 2003
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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イチゴの収穫システムの開発に関する研究 (第3報):高さ情報検出の理論について
永田 雅輝, 槐島 芳徳, 日吉 健二, 崔 永杰
農業機械学会誌 64 ( 0 ) 177 - 178 2002
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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イチゴ用ソフトハンドリング・グリッパの開発に関する研究:形状記憶合金を利用したグリッパの把持力制御
日吉 健二, 永田 雅輝, 槐島 芳徳, 崔 永杰
農業機械学会誌 64 ( 0 ) 287 - 288 2002
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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イチゴの収穫システムの開発に関する研究 (第4報):高さ情報の検出実験
永田 雅輝, 槐島 芳徳, 日吉 健二, 崔 永杰
農業機械学会誌 64 ( 0 ) 179 - 180 2002
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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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 (第3報):一番茶における加工精度の比較
槐島 芳徳, 永田 雅輝, 日吉 健二
農業機械学会誌 64 ( 0 ) 407 - 408 2002
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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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 Reviewed
日吉健二，永田雅輝，槐島芳徳，落合良治，積 栄，高橋弘行，古山隆司
農業機械学会九州支部誌 ( 50 ) 1 - 6 2001.8
Language：Japanese Publishing type：Research paper (scientific journal)
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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 Reviewed
槐島芳徳，永田雅輝，日吉健二
農業機械学会九州支部誌 ( 50 ) 61 - 66 2001.8
Language：Japanese Publishing type：Research paper (scientific journal)
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イチゴの収穫システムの開発に関する研究(第1報) : 2台のカメラによる水平位置計測と収穫ハンドの試作
永田 雅輝, 槐島 芳徳, 日吉 健二, 中島 竜佑, 大津 敢視
農業機械学会年次大会講演要旨 60 235 - 236 2001.4
Language：Japanese Publishing type：Research paper (scientific journal)
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イチゴの収穫システムの開発に関する研究(第2報) : イチゴ果実の位置認識と摘採法について
永田 雅輝, 槐島 芳徳, 日吉 健二, 中島 竜佑, 大津 敢視
農業機械学会年次大会講演要旨 60 237 - 238 2001.4
Language：Japanese Publishing type：Research paper (scientific journal)
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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(第2報) : 2つの評価指標を用いた妙り葉処理方法の加工精度評価
槐島 芳徳, 永田 雅輝, 日吉 健二
農業機械学会年次大会講演要旨 60 125 - 126 2001.4
Language：Japanese Publishing type：Research paper (scientific journal)
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イチゴの収穫システムの開発に関する研究 (第1報):2台のカメラによる水平位置計測と収穫ハンドの試作
永田 雅輝, 槐島 芳徳, 日吉 健二, 中島 竜佑, 大津 敢視
農業機械学会誌 63 ( 0 ) 235 - 236 2001
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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イチゴの収穫システムの開発に関する研究 (第2報):イチゴ果実の位置認識と摘採法について
永田 雅輝, 棟島 芳徳, 日吉 健二, 中島 竜佑, 大津 敢視
農業機械学会誌 63 ( 0 ) 237 - 238 2001
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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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 (第2報):2つの評価指標を用いた炒り葉処理方法の加工精度評価
槐島 芳徳, 永田 雅輝, 日吉 健二
農業機械学会誌 63 ( 0 ) 125 - 126 2001
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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Basic Study on Strawberry Harvesting Robot (Part 2) –Design and Development of Harvesting Mechanism - Reviewed
Nagata, M., Cao, Q., Hiyoshi, K., Muta, S., Ootsu, K.
BIO-BOBOTICS II 2nd IFAC/CIGR International Workshop 59 - 64 2000.11
Language：English Publishing type：Research paper (international conference proceedings)
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Basic Study on Strawberry Harvesting Robot (Part 1) -Algorithm for Locating and Feature Extracting of Strawberry Fruits- Reviewed
Cao, Q., Nagata, M., Gejima, Y., Shrestha, B. P., Hiyoshi, K., Ootsu, K.
BIO-BOBOTICS II 2nd IFAC/CIGR International Workshop 51 - 58 2000.11
Language：English Publishing type：Research paper (international conference proceedings)
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Study on sorting system for strawberry using machine vision (Part 2) Development of sorting system with direction and judgment functions for strawberry (Akihime variety) Reviewed
Bato, M., Nagata, M., Cao, Q., Hiyoshi, K., Kitahara, T.
農業機械学会誌 62 ( 2 ) 101 - 110 2000.3
Language：English Publishing type：Research paper (scientific journal)
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Study on mechanization of mulching cultivation using biodegradable film for early season culture rice (Part 2) Development of mulch slit cutting mechanism for biodegradable film using nylon cord Reviewed
Tadeo, B. D., Nagata, M., Mitarai, M., Ishino, F., Hiyoshi, K.
農業機械学会誌 62 ( 2 ) 154 - 166 2000.3
Language：English Publishing type：Research paper (scientific journal)
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Study on mechanization of mulching cultivation using biodegradable film for early season culture rice (Part 1) Utilization of biodegradable film for keeping the environment clean Reviewed
Tadeo, B. D., Nagata, M., Mitarai, M., Ishino, F., Hiyoshi, K.
農業機械学会誌 62 ( 2 ) 144 - 153 2000.3
Language：English Publishing type：Research paper (scientific journal)
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マシンビジョンによるイチゴの選別システムに関する研究(第2報) : イチゴ(章姫)の向きと判定の機能を備えた選別システムの開発
バト ペピトメンギト, 永田 雅輝, 曹 其新, 日吉 健二, 北原 上雄
農業機械學會誌 62 ( 2 ) 101 - 110 2000.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
第2報では, イチゴの向きと等階級判定機能を備えた選別ソフトウエアの開発と選別システムの構築を行った。開発したソフトウエアは, 第1報の方向決定ソフトウエアで向きを決定した後, イチゴの最大幅と高さによる面積とイチゴの上部形状面積との比から等級を判定し, 画像面積Aから階級を判定するものである。選別システムの構成は, 方向決定ソフトウエアと等階級判定ソフトウエアを備えたソフト部と, ベルトコンベア, ロボット, コンピュータ, CCDカメラのハード部からなる。章姫を用いた選別実験の結果, どの向きの章姫に対しても選別判定性能は等級で98.6%, 階級で100%と高い性能が得られた。判定時間は1.18秒以内であった。以上より, 開発した選別システムの有用性が確認できた。
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生分解性フィルムを用いた早期水稲マルチ栽培の機械化に関する研究(第2報) : ナイロンコードを用いた生分解性フィルム用マルチ穴開け機構について
タデオ ベルナルドD., 永田 雅輝, 御手洗 正文, 石野 文俊, 日吉 健二
農業機械學會誌 62 ( 2 ) 154 - 166 2000.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
水田へ敷設する生分解性フィルムヘマルチ穴を切開するために, ナイロンコードを用いたマルチ穴開け機構を開発した。本機構は, 回転式植付け機構を持つ田植機の植付アームに組付けられ, 切削部品として安全性の高いナイロンコードを用いること, 苗植付けの直前にナイロンコードの衝撃力でマルチ穴を切開することを特長としている。最適なマルチ穴長を求めるために, 植付け爪とナイロンコードの運動軌跡を求めた。その結果, 理論値および実験値から, マルチ穴長はナイロンコード長および取付け角度, 植付け深さと植付け間隔に影響されることが判った。植付け間隔120～160mm, 植付け深さ10～50mmの条件で理論値と実験値の差は最大でも5mm程度であり, 苗の植付けに必要かつ十分な長さのマルチ穴を切開することができた。よって, 本機構は水稲マルチ栽培用田植機のマルチ穴切開機構としての有用性を認めた。
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生分解性フィルムを用いた早期水稲マルチ栽培の機械化に関する研究(第1報) : 環境保全のための生分解性フィルムの利用
タデオ ベルナルドD., 永田 雅輝, 御手洗 正文, 石野 文俊, 日吉 健二
農業機械學會誌 62 ( 2 ) 144 - 153 2000.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
本報は, 生分解性フィルムを利用した環境保全型早期水稲マルチ栽培システムを研究するために, 生分解性フィルムの物理的強度, 保温性, 分解性, 水稲生育状況等の特性について検討した。<br>生分解性フィルムは, ポリエチレンフィルムに比べて, 横方向の引張り強度および引裂き強度が弱く, 保温性はポリエチレンフィルムに比べて0.3～0.8℃低く, 光量子のフィルムから反射する量は2～5%程高かった。生分解性フィルムの植物成長に与えるマルチ効果はポリエチレンフィルムとほぼ同じであった。一方, 生分解性フィルムは, マルチ効果が必要な初期生育期間の分解は少なく, 3ヶ月以降から急激に分解することから, 早期水稲のマルチ資材として有効的に利用できることを確認した。
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MECHANIZING THE BIODEGRADABLE FILM MULCHING CULTIVATION SYSTEM FOR EARLY-SEASON CULTURE RICE IN JAPAN Reviewed
Tadeo, B. D., Nagata, M., Ishino, F., Hiyoshi, K.
Proceedings of 1999 ASAE/CSAE-SCGR Annual International Meeting ( 991061 ) 1999.7
Language：English Publishing type：Research paper (international conference proceedings)
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Tadeo Bernardo D., Ishino Fumitoshi, Nagata Masateru, Hiyoshi Kenji
農業機械学会誌 61 ( 0 ) 479 - 480 1999
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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BIODEGRADABLE FILM MULCHING CULTIVATION SYSTEM FOR EARLY SEASON CULTURE RICE-Thermal Image Analyses of Mulch Film Using Thermography (Part I)- Reviewed
Nagata, M., Tadeo, B. D., Hiyoshi, K., Ishino, F., Mitarai, M., Gejima, Y.
Bulletin of the Faculty of Agriculture, Miyazaki University 45 ( 1・2 ) 143 - 151 1998.12
Language：English Publishing type：Research paper (bulletin of university, research institution)
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早期水稲の生分解性フイルムマルチ栽培に関する研究 (第1報) : サーモグラフィ装置によるマルチフィルムの熱画像解析
永田 雅輝, タデオ ベルナルド D., 日吉 健二, 石野 文俊, 御手洗 正文, 槐島 芳徳
宮崎大学農学部研究報告 45 ( 1 ) 143 - 151 1998.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：宮崎大学
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早期水稲のマルチ栽培用田植機に関する基礎研究（第3報）マルチ栽培用田植機の試作と圃場性能試験 Reviewed
日吉健二，永田雅輝，梅崎輝尚，ベルナルド D. タデオ，王 紅永
農業機械学会誌 60 ( 4 ) 13 - 22 1998.7
Language：Japanese Publishing type：Research paper (scientific journal)
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HIYOSHI Kenji, NAGATA Masateru, UMEZAKI Teruhisa, TADEO Bernardo D., WANG Hongyong
Journal of JSAM 60 ( 4 ) 13 - 22 1998.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
A prototype of rice transplanter for mechanizing the mulching cultivation system was developed to perform mulch laying and transplanting simultaneously. It was then evaluated in the field based on performance accuracy of mulch slit cutting and transplanting. Actual mulch slit lengths were approximately 2cm shorter than the theoretical value as the film was on paddy soil but 1 to 2cm longer than the minimum value required for transplanting. The transplanting positions were 3 to 5cm rearward of the theoretical one. Hence, some slits were shortened and made imperfect, and miss transplanting was observed when film placement was altered. However, 92% of mulch slits had seedlings transplanted normally. Therefore, this transplanter was confirmed workable in the field.
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早期水稲のマルチ栽培用田植機に関する基礎研究（第2報）ナイフ式マルチ穴開け機構の理論的解析 Reviewed
日吉健二，永田雅輝，梅崎輝尚，王 紅永，岡田芳一
農業機械学会誌 60 ( 2 ) 11 - 18 1998.3
Language：Japanese Publishing type：Research paper (scientific journal)
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HIYOSHI Kenji, NAGATA Masateru, UMEZAKI Teruhisa, WANG Hongyong, OKADA Yoshiichi
Journal of JSAM 60 ( 2 ) 11 - 18 1998.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
The motion equation of mulch slit cutting mechanism was deduced from combining the knife motion equation and the rotary type transplanting motion equation. The motions of the planting finger and the knife were simulated to determine the theoretical mulch slit length and planting position. Results showed that theoretical slit length is longer when planting depth is deeper, and shorter when hill spacing is wider. The planting position varies from the center of the slit to the front. Tests on the sliding soil bin, laid with film, showed that the tip of knife reached the film earlier than the planting finger, all slits were straight, and the planting position was similar to the theoretical value. Therefore, the possibility of making slits while transplanting was confirmed.
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早期水稲のマルチ栽培用田植機に関する基礎研究（第1報）ナイフ式マルチ穴開け機構の開発 Reviewed
永田雅輝，日吉健二，梅崎輝尚，王 紅永，岡田芳一
農業機械学会誌 60 ( 1 ) 14 - 22 1998.1
Language：Japanese Publishing type：Research paper (scientific journal)
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NAGATA Masateru, HIYOSHI Kenji, UMEZAKI Teruhisa, WANG Hongyong, OKADA Yoshiichi
Journal of JSAM 60 ( 1 ) 19 - 26 1998.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
This paper reports the study to speed up the growth of seedlings and to shorten heading and maturity duration of early season culture rice by introducing mulching cultivation using polyethylene film, and the study on the mechanism enabling the rice transplanter to do film laying and transplanting simultaneously for this cultivation. The knife type mulch slit cutting mechanism, linked with the rotary type transplanting mechanism, was developed to make slits on the film. The motion of the reciprocating and oscillating knife was analyzed using video images. The knife cuts a slit on the film just before transplanting the seedlings through the slit. The analysis confirmed that this cutting mechanism, which could be made a part of rice transplanter, can work well with film laying and transplanting.
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Root system developing of early season culture rice by mulching cultivation using polyethylene film
HIY0SHI Kenji, UMEZAKI Teruhisa, NAGATA Masateru, Bemardo D.TADE0, SHIM0DA Takeshi
Report of the Kyushu Branch of the Crop Science Society of Japan ( 63 ) 25 - 27 1997.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Crop Science Society of Japan
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早期水稲のポリエチレンフィルムマルチ栽培による根系の発達経過 Reviewed
日吉健二，梅崎輝尚，永田雅輝，タデオ ベルナルド D.，下田 傑
日本作物学会九州支部会報 ( 63 ) 25 - 27 1997.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Nagata Masateru, Hiyoshi Kenji, Okada Yoshiichi, Umezaki Teruhisa, Tadeo Bernardo D., Shimoda Takeshi
Bulletin of the Faculty of Agriculture, Miyazaki University 43 ( 2 ) 129 - 136 1997.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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早期水稲のポリエチレンフィルムマルチ栽培システムに関する研究早期水稲のポリエチレンフィルムマルチ栽培システムに関する研究（第2報）サーモグラフィ装置による水田の熱画像解析 Reviewed
永田雅輝，日吉健二，岡田芳一，梅崎輝尚，タデオ ベルナルド D.，下田 傑
宮崎大学農学部研究報告 43 ( 2 ) 129 - 136 1997.2
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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イチゴの自動選別システムに関する研究（第3報）画像処理による自動選別システムの開発 Reviewed
永田雅輝，木下 統，浅野克典，曹 其新，日吉健二
農業機械学会誌 59 ( 1 ) 43 - 48 1997.1
Language：Japanese Publishing type：Research paper (scientific journal)
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NAGATA Masateru, KINOSHITA Osamu, ASANO Katsunori, CAO Qixin, HIYOSHI Kenji
Journal of JSAM 59 ( 1 ) 43 - 48 1997.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
The possibility of classifying strawberry by shape was confirmed by previous experiments. This particular study tested the automatic sorting system where strawberries were manually placed on a turntable which conveys strawberries towards the distinction unit to classify according to their shapes and sizes. The judging time and distinction accuracy were found to be acceptable and effective. However, the carrying time was longer than by manual sorting, and further study to speed up the carrying time is necessary.
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早期水稲におけるポリエチレンマルチ栽培システムの研究:ナイフ式フィルム開孔機構による植付穴の形成
永田 雅輝, 日吉 健二, 岡田 芳一, タデオ ベルナルドD., 王 紅永
農業機械学会誌 59 ( 0 ) 87 - 88 1997
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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イチゴの自動選別システムに関する研究（第2報）画像処理による選別のための果形判別法 Reviewed
永田雅輝，木下 統，浅野克典，曹 其新，日吉健二
農業機械学会誌 58 ( 6 ) 61 - 67 1996.11
Language：Japanese Publishing type：Research paper (scientific journal)
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NAGATA Masateru, KINOSHITA Osamu, ASANO Katsunori, CAO Qixin, HIYOSHI Kenji
Journal of JSAM 58 ( 6 ) 61 - 67 1996.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
After proposing a geometric features for strawberry shape distinction and their effects verified, four judging methods were tested. As a result, three methods which use the center of gravity of projected area distinguished the shape more accurately, but required longer time for judging. Another method, which is considered useful and acceptable for its short judging time, has a distinction accuracy inferior to the other three and must be improved further.
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Mechanism of Mulch Film Cutter on Transplanting System for Mulching Cultivation of Early Season Culture Rice in Japan
Hiyoshi, K., Nagata, M., Wang, H., Umezaki, T.
1996 International Conference on Agricultural Machinery Engineering Proceedings 3 1996.11
Language：English Publishing type：Research paper (international conference proceedings)
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早期水稲のマルチ栽培システムにおける植付穴の形成について Reviewed
永田雅輝，日吉健二，王 紅永，タデオD.ベルナルド，岡田芳一，田中俊一郎
農業機械学会九州支部誌 ( 45 ) 17 - 21 1996.10
Language：Japanese Publishing type：Research paper (scientific journal)
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イチゴの自動選別システムに関する研究（第1報）画像処理装置による果形の幾何学的特徴の抽出 Reviewed
永田雅輝，木下 統，浅野克典，曹 其新，日吉健二
農業機械学会誌 58 ( 5 ) 57 - 63 1996.9
Language：Japanese Publishing type：Research paper (scientific journal)
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NAGATA Masateru, KINOSHITA Osamu, ASANO Katsunori, CAO Qixin, HIYOSHI Kenji
Journal of JSAM 58 ( 5 ) 57 - 63 1996.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
In strawberry production, sorting spends much time and labor, the development of an automatic system for sorting is envisioned. It is the objective of this study to develop an automatic sorting system for strawberry to optimize output and minimize labor costs. In this system, strawberry shape is distinguished by image processing through a computer. Seven geometric features which can express a strawberry shape were extracted and tried and their effects for effective shape distinction verified. The result showed that strawberry shape distinction was possible.
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HIY0SHI Kenji, UMEZAKI Teruhisa, NAGATA Masateru
Report of the Kyushu Branch of the Crop Science Society of Japan ( 62 ) 39 - 40 1996.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Crop Science Society of Japan
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早期水稲におけるポリエチレンフィルムマルチが根系の発達に及ぼす影響 Reviewed
日吉健二，梅崎輝尚，永田雅輝
日本作物学会九州支部会報 ( 62 ) 39 - 40 1996.5
Language：Japanese Publishing type：Research paper (scientific journal)
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永田 雅輝, 木下 統, 曹 其新, 日吉 健二, 岩切 覚
農業機械学会誌 58 ( 0 ) 157 - 158 1996
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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早期水稲におけるマルチ栽培システムの開発研究:開発したポリエチレンマルチ田植機による圃場実験
永田 雅輝, 日吉 健二, 木下 統, 王 紅永
農業機械学会誌 58 ( 0 ) 153 - 154 1996
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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イチゴの形状特徴抽出の一手法 Reviewed
永田雅輝，曹 其新，御手洗正文，藤木徳実，木下 統，日吉健二
農業機械学会九州支部誌 ( 44 ) 26 - 30 1995.9
Language：Japanese Publishing type：Research paper (scientific journal)
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主産地におけるイチゴ生産調査－福岡県筑後市の場合－ Reviewed
永田雅輝，木下 統，曹 其新，日吉健二，岩切 覚，辰巳保夫
農業機械学会九州支部誌 ( 44 ) 20 - 25 1995.9
Language：Japanese Publishing type：Research paper (scientific journal)
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永田 雅輝, 木下 統, 曹 其新, 日吉 健二
農業機械学会誌 57 ( 0 ) 175 - 176 1995
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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早期水稲におけるマルチ栽培システムの開発研究:サーモグラフィによる植物生体の温度測定
永田 雅輝, 木下 統, 日吉 健二, 曹 其新
農業機械学会誌 57 ( 0 ) 169 - 170 1995
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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Nagata Masateru, Hiyoshi Kenji, Umezaki Teruhisa
Bulletin of the Faculty of Agriculture, Miyazaki University 41 ( 2 ) 57 - 64 1994.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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早期水稲のポリエチレンフィルムマルチ栽培システムに関する研究（第1報） Reviewed
永田雅輝，日吉健二，梅崎輝尚
宮崎大学農学部研究報告 41 ( 2 ) 57 - 64 1994.12
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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多値層状神経回路網を使用したイチゴの形状とサイズの判定 Reviewed
永田雅輝，曹 其新，御手洗正文，藤木徳実，木下 統，日吉健二
農業機械学会九州支部誌 ( 43 ) 43 - 47 1994.9
Language：Japanese Publishing type：Research paper (scientific journal)
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SORTING SYSTEM OF STRAWBERRY BY USING COMPUTER AND ROBOT
Nagata, M., Kinoshita, O., Hiyoshi, K.
Proceedings of the First Asian Control Conference 2 13 - 16 1994.7
Language：English Publishing type：Research paper (international conference proceedings)
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永田 雅輝, 木下 統, 日吉 健二, 鄒 誠
農業機械学会誌 56 ( 0 ) 63 - 64 1994
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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永田 雅輝, 岡田 芳一, 御手洗 正文, 槐島 芳徳, 日吉 健二, 続 栄治, 寺尾 寛行, 梅崎 輝尚, 矢野 京蔵, 鄒 誠
農業機械学会誌 56 ( 0 ) 87 - 88 1994
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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ロボットによるイチゴの選別システムに関する研究 (第2報):形状の判別精度
永田 雅輝, 木下 統, 鄒 誠, 日吉 健二
農業機械学会誌 56 ( 0 ) 387 - 388 1994
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers
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永田 雅輝, 木下 統, 鄒 誠, 日吉 健二
農業機械学会誌 56 ( 0 ) 187 - 188 1994
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Agricultural Machinery and Food Engineers