Takashi OKAYASU | Last modified date:2023.11.27 |
Professor /
Bioproduction Environmental Sciences
Department of Agro-environmental Sciences
Faculty of Agriculture
Department of Agro-environmental Sciences
Faculty of Agriculture
Graduate School
Undergraduate School
Other Organization
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Homepage
https://kyushu-u.elsevierpure.com/en/persons/takashi-okayasu
Reseacher Profiling Tool Kyushu University Pure
http://www-ampsd.bpes.kyushu-u.ac.jp/
The goals and objectives of the Bioproduction Engineering are to develop the high productivity and the high quality of agricultural products by mechanizing and optimizing the farm work. Therefore, the technologies for development of high productivity by the improvement of the energy powers, the farm machinery and the cultivation systems with the information science is mainly studied. .
https://www-bpse.bpes.kyushu-u.ac.jp/?Page=HOME&Lang=en
Field of Bioproduction System Engineering .
https://www.bpes.kyushu-u.ac.jp/?Page=Home&Lang=en
Bioproduction Environmental Sciences .
Academic Degree
Ph.D.
Country of degree conferring institution (Overseas)
No
Field of Specialization
Agricultural Machinery
ORCID(Open Researcher and Contributor ID)
0000-0002-2571-8874
Total Priod of education and research career in the foreign country
00years02months
Outline Activities
1. DEVELOPMENT OF SOIL TILLAGE SIMULATOR USING FEM-DEM QUASI-COUPLING METHOD
Soil tillage simulator was developed by the FEM (Finite Element Method) - DEM (Discrete Element Method) quasi-coupling method. By using this simulator, not only the prediction of the soil dynamics such as soil cutting, crushing, reversing, and throwing and the soil reaction forces acting on the tillage tool but also the evaluation of stress and strain distribution in the tillage tool during the soil tillage operation are carried out. We are also trying to improve the accuracy in the development of proper constitutive models for describing the mechanical behavior of soils and metals, and the accurate modeling of tillage tools using 3D scanner and CAD.
2. DEVELOPMENT OF INFORMATIZATION AGRICULTURAL SUPPORTING SYSTEM AND EVALUATION OF ITS VALIDITY
The informatization agricultural supporting system called the “Agri-eye” is developed to optimize the agricultural production system. This system is composed of the field environmental monitoring and acquisition, the crop growth diagnosis and quality evaluation, the work history recording, the data analysis and visualization, the communication tools, and so on. Currently more than 50 devices have been already installed into more than 10 real fields mainly distributed in Fukuoka and Oita prefectures. The validity of the systems has been verified by the feasibility studies up to present.
3. UTILIZATION OF ICT IN TROPICAL AGRICULTURE
Environmental information is important factor affecting the agricultural production system. In four season countries including Japan, a weather condition during cultivations will be controlled by using a greenhouse and environmental control facilities. However, in tropical countries like Indonesia and Bangladesh, a utilization of the automatic environmental control system is still rare because of the operational costs and the economic reasons. Thus, we try to utilize the Information and Communication Technology (ICT) in order to improve the agricultural production system in the tropical agriculture. In this study, the simple field monitoring systems have been developed and installed into the real tropical fields in Indonesia and Bangladesh. These information measured are utilized to establish the real-time environmental evaluation and the decision support on the farm operations.
Soil tillage simulator was developed by the FEM (Finite Element Method) - DEM (Discrete Element Method) quasi-coupling method. By using this simulator, not only the prediction of the soil dynamics such as soil cutting, crushing, reversing, and throwing and the soil reaction forces acting on the tillage tool but also the evaluation of stress and strain distribution in the tillage tool during the soil tillage operation are carried out. We are also trying to improve the accuracy in the development of proper constitutive models for describing the mechanical behavior of soils and metals, and the accurate modeling of tillage tools using 3D scanner and CAD.
2. DEVELOPMENT OF INFORMATIZATION AGRICULTURAL SUPPORTING SYSTEM AND EVALUATION OF ITS VALIDITY
The informatization agricultural supporting system called the “Agri-eye” is developed to optimize the agricultural production system. This system is composed of the field environmental monitoring and acquisition, the crop growth diagnosis and quality evaluation, the work history recording, the data analysis and visualization, the communication tools, and so on. Currently more than 50 devices have been already installed into more than 10 real fields mainly distributed in Fukuoka and Oita prefectures. The validity of the systems has been verified by the feasibility studies up to present.
3. UTILIZATION OF ICT IN TROPICAL AGRICULTURE
Environmental information is important factor affecting the agricultural production system. In four season countries including Japan, a weather condition during cultivations will be controlled by using a greenhouse and environmental control facilities. However, in tropical countries like Indonesia and Bangladesh, a utilization of the automatic environmental control system is still rare because of the operational costs and the economic reasons. Thus, we try to utilize the Information and Communication Technology (ICT) in order to improve the agricultural production system in the tropical agriculture. In this study, the simple field monitoring systems have been developed and installed into the real tropical fields in Indonesia and Bangladesh. These information measured are utilized to establish the real-time environmental evaluation and the decision support on the farm operations.
Research
Research Interests
Membership in Academic Society
- Study on Measurement, Extraction, and Visualization of Plant Phenotype Using Computer Vision
keyword : Measurement, Extraction, and Visualization of Plant Phenotype, Computer Vision
2018.04. - Development of Low Cost Farming Support Robot and Verification of Its Validity
keyword : small and low-cost robots
2019.04. - Development of High-throughput Plant Phenotyping System
keyword : Plant Phenotyping, Plant Body Sensing, High Throughput Processing, Image Processing and Analysis, IoT
2014.04. - Study on Smart Agriculture
keyword : Smart Agricultre, Precision Agriculture, ICT, IoT, Field Monitoring System, GIS, Hyperspectral Imaging, Open software, Virtual and Augmented Reality
2005.06. - Study on numerical analyses of mechanical behavior in crop-machine system
keyword : Crop, Biomechanics, Inelastic behavior, Discrete Element Method (DEM), Finite Element Analysis (FEM)
2005.06. - Study on numerical analyses of mechanical behavior in soils-machine system
keyword : Soils, Inelastic behavior, Discrete Element Method (DEM), Finite Element Analysis (FEM)
2008.06. - Study on analysis of soil defomation behavior by elastoplastic FEM
keyword : Subloading surface model, Elastoplastic finite element method, Cyclic loading, Soil compaction, Optimal design
2002.09. - Study on elastoplastic constitutive equation of materials
keyword : Elastoplastic, Rate (time)-dependency, Creep, Stress relaxation, Subloading surface model, Structure
2002.01. - Study on experimental and theoretical analyses for frictional phenomena between structures
keyword : Frictional phenomenon, Subloading surface concept, Sliding, Cyclic friction
2002.04~2008.03. - Development of soil displacement measurement system based on PIV
keyword : PIV (Particle Image Velocimetry), Soil deformation, Soil compaction, Wheel, Online measurement system
2002.01. - Study on traveling performance of off-road vehicle and soil deformation
keyword : Drawbar pull, Traveling resistance, Trafficability, Tractive performance
1996.04.
Books
Reports
1. | Takashi OKAYASU, Informatization Agriculture in Japan, Proceedings of the International Symposium on Agricultural and Biosystem Engineering (ISABE) 2013, 8pages, 2013.08, Agriculture is dependent on climate, weather, soil conditions, and crop types. Therefore, farmers have tried to develop and improve their own cultivation techniques and senses during the long-term experiences so as to fit the peripheral field environment. Information Communication Technology (ICT) is currently applied in several fields of agriculture to improve the agricultural productivity and cultivation skills. There are many kinds of ICT-agriculture applications that already used for supporting the agricultural production such as environmental monitoring, precision agriculture including spatial data collection, precision irrigation and supplying data to farmers, facility automation including greenhouse control and animal-feeding facility (Wang, 2006). On the other hand, authors have tried to develop the informatization agricultural supporting system called “Agri-eye” to optimize the agricultural production system (Okayasu et al., 2010). This system is composed of field environmental monitoring and acquisition, crop growth diagnosis and quality evaluation, work history recording, data analysis and visualization, and communication tools, and so on. The field environmental monitoring devices above 50 have been installed in the fields above 10 mainly in the Fukuoka and the Oita prefectures. The work recording system has been also distributed over the Internet and can be utilized through the web browsers on personal computers, mobile phones, and smartphones. The validity of the systems has been verified by the feasibility studies up to present. In this article, several application examples of the informatization agriculture in Japan will be introduced here.. |
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Papers
Works, Software and Database
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16. | Visual Basic Programming for Beginners on the Web (in Japanese). |
17. | Internet Teaching Material on the Elastoplasticity (in Japanese). |
Presentations
- The Japanese Society of Agricultural Machinery and Food Engineers
- Japanese Society of Agricultural Informatics
- The Society of Instrument and Control Engineers
- Japan Forest Engineering Society
- Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists
- Information Processing Society of Japan
- Japanese Geotechnical Society
- The Japanese Society of Kyushu Agricultural Machinery and Food Engineers
- Japanese Society of Terramechanics
- International Society for Terrain-Vehicle Systems
Educational
Educational Activities
Undergraduate School
Special Lecture on Advanced Topics of Agriculture
Water, Soil and Green in Itoshima Area
Agri-Food Production System Engineering
Agricultural Informatics
Structural Mechanics
Farm Machinery II
Machinery Design II
Scientific English
Graduation Research (Bioproduction System Engineering)
Graduate School
Master Course
Advanced Bioproduction Environmental Data Analyses
Bioproduction Environmental Sciences
Bioproduction Environmental Sciences Special Reseach II
Bioproduction Environmental Sciences Project Learning
Advanced Production Systsems Desgin
Graduation Research (Bioproduction Environmental Science)
Special Lecture on Advanced Topics of Agriculture
Water, Soil and Green in Itoshima Area
Agri-Food Production System Engineering
Agricultural Informatics
Structural Mechanics
Farm Machinery II
Machinery Design II
Scientific English
Graduation Research (Bioproduction System Engineering)
Graduate School
Master Course
Advanced Bioproduction Environmental Data Analyses
Bioproduction Environmental Sciences
Bioproduction Environmental Sciences Special Reseach II
Bioproduction Environmental Sciences Project Learning
Advanced Production Systsems Desgin
Graduation Research (Bioproduction Environmental Science)
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