| 1. |
Phon, S., Inoue, E. Mitsuoka, M., Okayasu, T., Hirai, Y., Detection of Target Reference Points of a Hand Tractor Based on Transfer Path Analysis Technique, Journal of the Japanese Society of Agricultural Machinery and Food Engineering, 85, 3, 170-179, 2023.05. |
| 2. |
Phon, S., Inoue, E. Mitsuoka, Okayasu, T., Hirai, Y., Investigation of Vibration Characteristics of Hand Tractor Based on Frequency-domain and Vibration Intensity, Journal of the Japanese Society of Agricultural Machinery and Food Engineering, 83, 5, 369-375, 2021.09. |
| 3. |
Ko, K. M. M,, Hirai, Y., Yamakawa, T., Inoue, E., Okayasu, T., Mitsuoka, M., Nitrogen Mineralization from Flowering- and Maturity-stage Green Manures under Flooded Conditions after
Different Upland Periods, Japan Agricultural Research Quarterly (JARQ), 55, 3, 233-244, 2021.07. |
| 4. |
Inoue, S., Hirai, Y., Inagaki S., Inoue, E., Okayasu, T., Mitsuoka, M., Volume Measurement of Particle Layers in a Container by Using Helmholtz Resonance, Journal of Faculty of Agriculture, Kyushu University, https://doi.org/10.5109/4363556, 66, 1, 91-95, 2021.02.  |
| 5. |
Hirai, Y., Furukawa, D., Inoue, E., Okayasu, T., Mitsuoka, M., An Evaluation Method for Threshing Operations Using a Rod–shaped Threshing Tooth Acting on a Single Rice, Journal of Faculty of Agriculture, Kyushu University, https://doi.org/10.5109/4363552, 66, 1, 57-60, 2021.02. |
| 6. |
Andri Prima Nugroho, Takashi Okayasu, Takehiko Hoshi, Eiji Inoue, Hirai Yasumaru, Mitsuoka Muneshi, Lilik Sutiarso, Development of a remote environmental monitoring and control framework for tropical horticulture and verification of its validity under unstable network connection in rural area, Computers and Electronics in Agriculture, 10.1016/j.compag.2016.04.025, 124, 325-339, 2016.06, This study focuses on the development and evaluation of a remote field environmental monitoring and control framework, implementing a local-global management strategy to overcome the unstable network connection in the rural area. The framework consists of environmental monitoring and control node as the local management subsystem (LMS), and the web data providing and system management as the global management subsystem (GMS) to establish a simple and flexible remote environmental monitoring and control based on a cloud platform. The supporting features are online and offline environmental monitoring, synchronization of system configuration, actuation, and offline management. Two field tests were conducted to verify its performances and functionalities, (1) environmental monitoring on tropical horticulture cultivation in Yogyakarta, Indonesia, and (2) implementation of the monitoring and control for automatic drip irrigation control based on soil moisture content for tomato. As the result of the first test, the developed framework could help to maintain the sustainability of environmental monitoring under unstable network connection over 80% availability of the data with local offline measurement up to 24% of the total entries. From the second test result, the framework could support the real-time monitoring and control of soil moisture content as well as increase the system flexibility in the adjustment of the system configuration remotely. The control system has 0.78% error (E) and 99.2% in-range soil moisture content (L t |
| 7. |
Zhen Li, Muneshi Mitsuoka, Eiji Inoue, Takashi Okayasu, Yasumaru Hirai, Zhongxiang Zhu, Parameter sensitivity for tractor lateral stability against Phase I overturn on random road surfaces, Biosystems Engineering, 10.1016/j.biosystemseng.2016.07.004, 150, 10-23, 2016.10, Statistics show that lateral overturns are the most frequent fatal accidents involving tractors. There is thus much research interest in improving tractor lateral stability. Previous research has discovered the effects of various factors on tractor dynamic responses. While these factors have been analysed separately, their relative significance with respect to other factors remain uncertain. Furthermore, the practical limits of what operators can do have not been considered. The present study assumed a possible case that a tractor operator has several spare tyres of different types and service condition. Additionally, the ballast weight, track width, and implement position can usually be controlled before operation. A scale model tractor was thus developed allowing changes to these factors. The model tractor was designated to pass over typical farming road surfaces. Moreover, the tractor lateral stability was evaluated in terms of the roll angle, lateral-load transfer ratio, and Phase I overturn index. Employing the Taguchi method, we arranged experiments and assessed the applicability of the three kinds of indexes regarding tractor Phase I overturn. Results revealed that the roll angle did not well reflect the initiations of overturns. Compared with the lateral-load transfer ratio, the Phase I overturn index had more convincing factorial effects on tractor stability. Further investigation of the suggested tractor configuration supported this conclusion by comparing predicted and experimental results. In practical cases, this approach may provide a reference for engineers to help operators improve driving safety with limited spare parts.. |
| 8. |
Jung Seob Choe, Kohei Takata, Eiji Inoue, Tae Wook Kim, Mitsuoka Muneshi, Takashi Okayasu, Hirai Yasumaru, Judging the abnormalities of agricultural machinery by using Mahalanobis' distance, Journal of the Faculty of Agriculture, Kyushu University, 62, 2, 469-476, 2017.09, This study calculated the Mahalanobis' distance, which is a multidimensional space distance with correlations, from the time-series data of 3-axis translational acceleration and 3-axis rotational angular speed, and examined whether this could be used in judging the abnormalities of the agricultural machineries. As the result, using the Mahalanobis' distance to determine the abnormality of the data was not possible for the changes in not-so-big behaviors, such as turning and temporary stop, but determining the abnormality of the data using the Mahalanobis' distance was clearly possible for sudden changes to the operating status of the equipment, such as a roll over and passing obstacles through an experiment using the model car. We hypothesized in the beginning that the distribution of the Mahalanobis' distance at the signal space could be separated with the distribution of the Mahalanobis' distance at the unit space. However, unless there is a large-scale change to the behavior, such as a roll over, etc., complete separation is difficult in reality, and we determined realistically that conducting the abnormality determination from the significant difference viewpoint by placing a threshold value to the normalized distribution of the Mahalanobis' distance at the unit space is possible.. |
| 9. |
Zhen Li, Mitsuoka Muneshi, Eiji Inoue, Takashi Okayasu, Hirai Yasumaru, Zhongxiang Zhu, Zhenghe Song, Enrong Mao, Identification of configurational effectiveness on improvement of tractor stability on uneven roads, Journal of the Faculty of Agriculture, Kyushu University, 63, 1, 113-117, 2018.02, It has been identified that tractor stability can be affected by multiple factors, including configurational and environmental parameters. To improve tractor stability and enhance the resistance of the tractorimplement system to exterior disturbs, three tractor physical parameters were selected as the key control factors to examine their statistical significances and to find out the corresponding desired levels. In this study, a scaled experimental system consisting of a scaled tractor-implement model, force-sensing system, random road surfaces was developed. The tractor was operated to travel forward passing over two classes of rough road. Various tractor configuration patterns were assigned following the L27 orthogonal array according to the Taguchi design of experiment. Adopting the concept of lateral-load transfer ratio, the output voltage signals of the force sensing resistors were calculated for the stability indexes basing on tractor front and rear axles. Results showed that the type of tractor front tire and the ballast weight significantly varied the ground contact condition of the front tires, while the rear track width of the tractor predominantly determined the rear-axle-based vehicle stability.. |
| 10. |
Takashi Okayasu, Andri Prima Nugroho, Atsushige Sakai, Disaku Arita, Takashi Yoshinaga, Rin Ichiro Taniguchi, Masafumi Horimoto, Eiji Inoue, Yasumaru Hirai, Muneshi Mitsuoka, Affordable field environmental monitoring and plant growth measurement system for smart agriculture, 11th International Conference on Sensing Technology, ICST 2017
2017 11th International Conference on Sensing Technology, ICST 2017, 10.1109/ICSensT.2017.8304486, 1-4, 2018.02, Nowadays, various affordable sensors and devices have been developed and utilized in a wide area of sectors. Needless to say, agriculture sector is no exception. They have already been applied to improve agricultural production in terms of advancing the knowledge and techniques of farming, reducing production costs, and improving the quality of agricultural produce. This paper introduces the current situation and example of the affordable sensors and devices for field environment monitoring and plant growth measurement in smart agriculture.. |
| 11. |
Zhongbin Wu, Bin Xie, Zhen Li, Ruijuan Chi, Zhiyong Ren, Yuefeng Du, Eiji Inoue, Muneshi Mitsuoka, Takashi Okayasu, Yasumaru Hirai, Modelling and verification of driving torque management for electric tractor
Dual-mode driving intention interpretation with torque demand restriction, Biosystems Engineering, 10.1016/j.biosystemseng.2019.04.002, 182, 65-83, 2019.06, A torque management model (TMM) focused on the close matching of driving requirements and operating conditions for electric tractors was developed. The TMM used the accelerator pedal output signal to establish the torque demand to adapt for two conditions – field traction and road driving. Further, the TMM uses the limitations of a time-based torque ramp, maximum motor torque at the current speed, and battery state of charge. To verify the performance of the TMM, a tractor control unit (TCU) to support the TMM was designed, and a test bench comprising both driving and loading devices was built. The bench provided the TMM/TCU with the necessary operating states needed as inputs to determine the torque demand. Experiments were performed under five specific manoeuvring cases. The test results showed that the TMM was capable of accurately converting pedal manipulations into torque demands both in the field traction and road driving conditions. The torque changes during testing were properly smoothed by limiting the rising and falling time of the target torque, which was favourable for eliminating impacts due to torque fluctuations. Overloading operations that would occur in case of excessive torque request were avoided by the torque capacity limitation both in the field traction and road acceleration tests. When the bus voltage was deliberately adjusted below the alarm threshold, the TMM could scale down the torque demand in real time according to the deviation between the actual voltage and the threshold, and therefore, it always kept the voltage above the safe level.. |
| 12. |
Ko, K. M. M,, Hirai, Y., Yamakawa, T., Mori, Y., Inoue, E., Okayasu, T., Mitsuoka, M., Investigation of the feasibility of applying maturity-stage green manure (crimson clover) for rice production through a pot experiment, Journal of Japanese Society of Agricultural Technology Management, 27, 3, 85-98, 2021.02. |
| 13. |
Ko, K. M. M,, Hirai, Y., Yamakawa, T., Inoue, E., Okayasu, T., Mitsuoka, M., Physicochemical properties and nitrogen mineralization of maturity-stage green manure (crimson clover) and the effects on growth of rice cultivated in a Wagner pot, Journal of Japanese Society of Agricultural Technology Management, 27, 1, 15-28, 2020.07. |
| 14. |
Borin KHEM, Yasumaru HIRAI, Takeo YAMAKAWA, Yuki MORI, Eiji INOUE, Takashi OKAYASU, Muneshi MITSUOKA
, NPK balances in whole crop rice cultivation under different application methods of manure and chemical fertilizer, Journal of the Japanese Agricultural Science Society, 34, 4, 81-93, 2018.12. |
| 15. |
Ryuichi YOSHIZAKI, Yasumaru HIRAI, Eiji INOUE, Takashi OKAYASU, Muneshi MITSUOKA, Relationships between Bulk Density and Particle Density of Rough Rice Piled in a Vertical Cylinder, Journal of the Japanese Society of Agricultural Machinery and Food Engineering, 80, 5, 280-288, 2018.09. |
| 16. |
Borin Khem, Yasumaru Hirai, Takeo Yamakawa, Yuki Mori, Eiji Inoue, Takashi Okayasu, Muneshi Mitsuoka, Effects of different application methods of fertilizer and manure on soil chemical properties and yield in whole crop rice cultivation, Soil Science and Plant Nutrition, 10.1080/00380768.2018.1443399, 64, 3, 406-414, 2018.06. |
| 17. |
Ryuichi Yoshizaki, Yasumaru Hirai, Muneshi Mitsuoka, Shio Inagaki, Eiji Inoue, Takashi OKAYASU, Relationships between Mass and Porosity of Rough Rice Piled in a Combine Grain Tank, Proceedings of the 9th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 618-623, 2018.05. |
| 18. |
Yasumaru Hirai, Takeo Yamakawa, Eiji Inoue, Takashi OKAYASU, Muneshi Mitsuoka, Analysis of high-yield conditions using a rice yield predictive model, The International Conference on Precision Agriculture, 2016.07. |
| 19. |
Yasumaru Hirai, Kodai Tanaka, Tsuneo Nakanishi, Takeshi Shikanai, Eiji Inoue, Takashi OKAYASU, Muneshi Mitsuoka, Measurement accuracy of the area of combine-harvested field sections
corresponding to a truckload of grain received at a grain elevator, Engineering in Agriculture, Environment and Food, 2017.07. |
| 20. |
Mao Ogata, Yasumaru Hirai, Tsuneo Nakanishi, Takeshi Shikanai, Eiji Inoue, Takashi OKAYASU, Muneshi Mitsuoka, Accuracy evaluation of a method to compute the area of combine-harvested field sections, Proceedings of the 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 598-602, 2016.05. |
| 21. |
Soichiro Iwasaka, Yasumaru Hirai, Takeo Yamakawa, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, Accuracy of Rice Straw Weight and Rough Grain Yield Predicted by a Modified Crop Growth Model Based on SUCROS1, Proceedings of the 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 592-597, 2016.05. |
| 22. |
Yasumaru Hirai, Yuta Nakamura, Atsushige Sakai, Takashi OKAYASU, Eiji Inoue, Mitsuoka Muneshi, Evaluation of a method to estimate light-intercepting characteristics of a rice hill using a RGB-DEPTH sensor
, Proceedings of the 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 483-494, 2016.05. |
| 23. |
日野翔太, 梅野 覚, 井上 英二, 岡安 崇史, 平井 康丸, 光岡 宗司, アクティブノイズコントロールを用いた農業機械騒音の低減に関する基礎的研究, 九大農学芸誌, 70, 1, 7-14, 2015.02. |
| 24. |
田中大介, 岡安 崇史, 永尾宏臣, 坂井佑輔, 粟井一勝, 井上 英二, 平井 康丸, 光岡 宗司, 農作業履歴収集の電子化とその利活用技術の開発, 九州大学大学院農学研究院学芸雑誌, 70, 1, 15-20, 2015.02. |
| 25. |
Li Zhen, 光岡 宗司, 井上 英二, 岡安 崇史, 平井 康丸, Effect of Geometric Configuration on Tractor Stability Characteristics, J. Fac. Agr., Kyushu Univ., 61, 1, 153-156, 2016.02. |
| 26. |
Li Zhen, 光岡 宗司, 井上 英二, 岡安 崇史, 平井 康丸, Modeling Agricultural Tractor Motion on Sloping Ground Considering Longitudinal and Lateral Gradients, J. Fac. Agr., Kyushu Univ., 61, 1, 147-152, 2016.02. |
| 27. |
Li Zhen, 光岡 宗司, 井上 英二, 岡安 崇史, 平井 康丸, Development of tractor stability indicators for dynamic Phase I overturn, Biosystems Engineering, 134, 55-67, 2015.04. |
| 28. |
Li Zhen, 光岡 宗司, 井上 英二, 岡安 崇史, 平井 康丸, Zhu Zhonxiang, Prediction of Tractor Sideslipping Behavior Using a Quasi-static Model, J. Fac. Agr., Kyushu Univ., 60, 1, 215-218, 2015.02. |
| 29. |
Li Zhen, 光岡 宗司, 井上 英二, 岡安 崇史, 平井 康丸, Modification of a Tractor Dynamics Model Consideration the Rotatable Front End, J. Fac. Agr., Kyushu Univ., 60, 1, 219-224, 2015.02. |
| 30. |
Khem Borin, 平井 康丸, 山川 武夫, 森 裕樹, 井上 英二, 岡安 崇史, 光岡 宗司, Production of Rice for Whole Crop Silage Using Manure in Itoshima Region, Fukuoka Prefecture, J. Fac. Agr., Kyushu Univ., 60, 1, 65-71, 2015.02. |
| 31. |
Tsuneo Nakanishi, Yasumaru Hirai, Kodai Tanaka, A device and an algorithm to compute the harvested area from the moving trace of the combine harvester, Proceedings of the 7th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 347-353, CD-ROM, 2014.05. |
| 32. |
Yasumaru Hirai, Kodai Tanaka, Tsuneo Nakanishi, Takeshi Shikanai, Eiji Inoue, Akira Fukuda, Takashi OKAYASU, Mitsuoka Muneshi, Evaluation of measurement accuracy of the harvest area corresponding to each shipment to country elevator using GPS and QZSS, Proceedings of the 7th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 995-999, CD-ROM, 2014.05. |
| 33. |
猿田恵輔, Hirai Yasumaru, 田中恒大, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, Predictive models for yield and protein content of brown rice using support vector machine, Computers and Electronics in Agriculture, 10.1016/j.compag.2013.09.003, 99, 93-100, 2013.09. |
| 34. |
Yasumru Hirai, Saruta Keisuke, Kunihiko Hamagami, Evaluation of an analytical method to identify determinants of rice yield components and protein content, Computers and Electronics in Agriculture, 10.1016/j.compag.2012.02.001, 83, 77-84, 2012.04. |
| 35. |
Density Current Caused by Natural Cooling in a Closed Water Body with Shallow . |
| 36. |
Kunihiko HAMAGAMI, Ken Mori, Shota Iguchi, Yasumaru Hirai, Response Characteristics of Internal Wave to Wind Stress in a Shallow Closed Water Body, J. Fac. Agr., Kyushu Univ., 56, 1, 123-128, 2011.02. |
| 37. |
Estimation of inorganic nitrogen concentration in irrigation water using electrical conductivity measurements. |
| 38. |
Field-use oriented Model for Estimation of Diurnal Variation of Water Temperature
in a Paddy Field. |
| 39. |
Survey of working hours, production costs, and income associated with rice production in rice terraces. |
| 40. |
Akinori Ozaki, Ken Mori, Yasumaru Hirai, Kunihiko Hamagami, Effect of Floating Vegetation on Wind Flow and Wave in Closed Water Body, J. Fac. Agr., Kyushu Univ., 54, 2, 489-498, 2009.10. |
| 41. |
Yasumaru Hirai, Kenzo Kawai, Marika Mouri, Yuki Mori, Kunihiko Hamagami, Feasibility Study on Electrical-conductivity-based Field Measurement of Inorganic Nitrogen Concentration in Irrigation Water , Proceedings of International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), CD-ROM, 2010.04. |
| 42. |
Production Environment in the Rice Terraces of Hoshino Village, Fukuoka Prefecture. |
| 43. |
Kunihiko Hamagami, Ken Mori, Yasumaru Hirai, Thermal convection in a closed water body with Compound Cross Section, J. Fac. Agr., Kyushu Univ., 55, 1, 145-151, 2010.02. |
| 44. |
Kunihiko Hamagami, Ken Mori, Yasumaru Hirai, Effect of Horizontal Convection on the Natural Cooling Process at Water Surface in a Closed Water Body, J. Fac. Agr., Kyushu Univ., 55, 1, 137-143, 2010.02. |
| 45. |
Three Dimensional Analysis of the Wind Induced Flow by means of the Low Reynolds Number k-e Turbulent Model. |
| 46. |
Effects of Nitrogen Supply from Irrigation Water on Rice Production. |
| 47. |
Yasumaru Hirai, Kunihiko Hamagami, Effects of Air Temperature, Nitrogen Concentration in Irrigation Water, and Cultivation Practices on Rice Production in the Rice Terrace Region, J. Fac. Agr., Kyushu Univ., 54, 2, 305-311, 2009.11. |
| 48. |
Evaluation of the Fertilizer Characteristics of Nitrogen in Liquid Compost by Rice Cultivation in Pots. |
| 49. |
Yasumaru Hirai, Yuichiro Beppu, Kunihiko Hamagami, Ken Mori, Regional-Scale Estimation of Rice Production Environment
in the Mountainous Area, Proceedings of the 4th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), CD-ROM, 2008.05. |
| 50. |
Yasumaru Hirai, Yuichiro Beppu, Yuki Mori, Keiko Tomita, Kunihiko Hamagami, Ken Mori, Principal Component Analysis of Rice Production Environment in the Rice Terrace Region, Proc. 9th International Conference on Precision Agriculture, CD-ROM, 2008.08. |
| 51. |
Nguyen Van Tuan, Ken Mori, Yasumaru Hirai, Selection of Genetic Algorithm Operators and Application for Calibration of Dissolved Oxygen Simulation in the River Water Quality Model, J. Fac. Agr., Kyushu Univ., 52(2), 439-444, 2008.02. |
| 52. |
Nguyen Van Tuan, Vu Chi Cong, Kunihiko Hamagami, Tomokazu Haraguchi, Ken Mori, Yasumaru Hirai, Estimation of Daily Cyclic Water Quality in the Shikinawa Lake, J. Fac. Agr., Kyushu Univ., 53(1), 241-249, 2008.02. |
| 53. |
Kunihiko HAMAGAMI, Ken MORI, Yasumaru HIRAI, Development Process of Thermal Convection Based on Water Surface Cooling with Aquatic Plants, J. Fac. Agr., Kyushu Univ., 53(1), 227-232, 2008.02. |
| 54. |
Vu Chi Cong, Nguyen Van Tuan, Ken Mori, Yasumaru Hirai, An Application of Control Volume Method to Simulate of Soil Water Distribution under Line Source of Trickle Emitters, J. Fac. Agr., Kyushu Univ., 53(1), 233-240, 2008.02. |
| 55. |
Yasumaru Hirai, Kengo Tagami, Kunihiko Hamagami, Susumu Uchida, Shigeki Inaba, Ken Mori, Evaluation of Environment on Rice Production for the Rice Terraces in Hoshino Village, J. Fac. Agr., Kyushu Univ., 53(1), 95-100, 2008.02. |
| 56. |
Yasumaru Hirai, Kunihiko Hamagami, Ken Mori, Investigation of a Laser Scanner for Measurement of Lodging Posture of a Wheat Bunch, J. Fac. Agr., Kyushu Univ., 53(1), 89-93
, 2008.02. |
| 57. |
Kunihiko HAMAGAMI, Ken MORI, Yasumaru HIRAI, Effect of Aquatic Plants on Thermal Convection in a Closed Water Body, PIV 2007 Symposium, 2007.10. |
| 58. |
Technical know-how to produce environmental monitoring equipment using a solar battery. |
| 59. |
Y. Hirai, K. Mori, A. Ozaki, K. Hamagami, Experimental Study for Wind Velocity profiles in and around a rice canopy at different growing stages, Journal of the faculty of agriculture, Kyushu University, 2007.01. |
| 60. |
Y. Hirai, M. D. Schrock, D. L. Oard, T. J. Herrman, Delivery System of Tracing Caplets for Wheat Grain Traceability, Applied Engineering in Agriculture, 22(5), 747-750, 2006.01. |
| 61. |
Y. Hirai, M. D. Schrock, D. Maski, R. K. Taylor, Loss Evaluation of Soybean Harvesting on Four Types of Headers, Agricultural Equipment Technology Conference, Louisville, Kentucky, ASAE Pub #AETC05020, 2005.02. |
| 62. |
Y. Hirai, M. D. Schrock, D. L. Oard, T. J. Herrman, A “Proof of Concept” Delivery System for Grain Tracing Caplets on the Combine, ASAE Annual International Meeting, Tampa, Florida, ASAE Pub #056029, 2005.07. |
| 63. |
Y. Hirai, E. Inoue, K. Mori, Application of a Quasi-static Stalk Bending Analysis to the Dynamic Response of Rice and Wheat Stalks gathered by a Combine Harvester Reel, Biosystems Engineering, 10.1016/j.biosystemseng.2004.04.010, 88, 3, 281-294, Vol.88, No.3, pp.281-294, 2004.01. |
| 64. |
Y. Hirai, E. Inoue, M. Matsui, K. Mori, K. Hashiguchi, Reaction Force of a Wheat Stalk Undergoing Forced Displacement, 農業機械学会誌, Vol.65, No.2, pp.47-55, 2003.03. |
| 65. |
Y. Hirai, E. Inoue, K. Mori, Reaction Force of Wheat Stalks during the Reel Operation of a Combine Harvester, The International Conference on Crop Harvesting and Processing, Louisville, Kentucky, ASAE Pub #701P1103e, 2003.02. |
| 66. |
Y. Hirai, E. Inoue, M. Matsui, K. Mori, K. Hashiguchi, Reaction Force and Posture of a Bunch of Wheat Stalks Undergoing Forced Displacement, 農業機械学会誌, Vol.65, No.2, pp.56-63, 2003.03. |
| 67. |
Y. Hirai, E. Inoue, K. Mori, Numerical Analysis of the Reaction Force of a Single Rice Stalk undergoing Forced Displacement, Biosystems Engineering, 10.1016/S1537-5110(03)00132-6, 86, 2, 179-189, Vol.86, No.2, pp.179-189, 2003.11. |
| 68. |
Y. Hirai, E. Inoue, T. Fukushima, I. Ueka, K. Mori, Analysis of the Reaction Force of a Bunch of Rice Stalks undergoing Forced Displacement, Journal of the faculty of agriculture, Kyushu University, 48, 1-2, 175-186, 48(1∙2), pp.175-186, 2003.01. |
| 69. |
Study on the Counting Sensor for Threshing Control, Study on the Counting Sensor for Threshing Control, 農業機械学会誌, Vol.64, No.5, pp.95-100, 2002.09. |
| 70. |
Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Investigation of Mechanical Interaction between a Combine Harvester Reel and Crop Stalks, Biosystems Engineering, 10.1016/S1537-5110(02)00176-9, 83, 3, 307-317, Vol.83, No.3, pp.307-317, 2002.11. |
| 71. |
Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Analysis of Reaction Forces of a Single Rice Stalk during Gathering Operations, The International Agricultural Engineering Conference (Asian Association for Agricultural Engineering), Wuxi, China, pp.366-371, 2002.11. |
| 72. |
Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Analysis of Reaction Forces and Posture of a Bunch of Crop Stalks during Reel Operations of a Combine Harvester, the CIGR Journal of Scientific Research and Development (CIGR electronic journal), Vol.IV, 2002.01. |
| 73. |
Mechanical properties of rice and wheat stalks during reel operations were investigated for the purpose of improving performance of harvesting in terms of mechanical interaction between a combine harvester reel and crops. Reaction forces in horizontal and vertical directions were measured as a bunch of rice and wheat stalks were deflected. Also, reaction forces deflected by forced displacements were analyzed numerically based on the mechanical model of crop stalk.. |
| 74. |
Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Examination of Mechanical Properties of Crop Stalks in Reel Operations, International Conference on “Physical Method in Agriculture –Approach to Precision and Quality-” (International Society of Agromaterials Science and Engineering), Prague, Czech Republic, pp.123-126, 2001.08. |
| 75. |
Dynamic characteristics of a rice stalk were examined in order to clarify mechanical interaction between crop stalks and a combine reel, and obtain design parameters of a reel for the improvement accuracy and efficiency in harvesting operations. Frequency response charactersitics (amplitude ratio against a shaking frequency) and natural frequency of a rice stalk were investigated by the forced vibration experiment using a shaker. Also, Rayleigh method was applied to the analysis of natural frequency of a rice stalk having variety sectional area, and validity of the method was discussed by comparing with experimental results.. |
| 76. |
E. Inoue, H. Konya, Y. Hirai, R. Noguchi, K. Hashiguchi, J. S. Choe, Identification of Dynamic Parameters of the Rubber Crawler System for Farm Machinery, 3rd International Conference on Agricultural Machinery Engineering (Korean Society for Agricultural Machinery), Vol.2, pp.146-153, 2000.11. |
| 77. |
Yasumaru Hirai, Eiji Inoue, Koichi Hashiguchi, Choe Jung-Seob, Takashi Okayasu, Tomoko Kuwano, Examination of Mechanical Model for Crop Stalks in Harvesting, 農業機械学会九州支部誌, Vol.49, pp.7-11, 2000.12. |
| 78. |
Y. Hirai, E. Inoue, K. Hashiguchi, Y. Kim, S. Inaba, K. Tashiro, Examination of Calculation Method for Flexural Rigidity of Crop Stalks, 3rd International Conference on Agricultural Machinery Engineering (Korean Society for Agricultural Machinery), Vol.2, pp.287-294, 2000.11. |
