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