Papers - NAMBA Kazuhiko

Development of Direct Measurement Methods for Dynamic Assistive Force of Powered Exoskeleton Reviewed

Masahiro TANAKA, Satoru UMENO, Yutaka KIKUCHI, Xiaohan XIANG, Kazuhiko NAMBA

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   85 ( 3 )   149 - 154   2023.6

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Biosensing Method of Growth Diagnosis in Forcing Culture of Strawberry: Study on Airflow Conditions required to Expose Growth Points Reviewed

Shogo TSUBOTA, Kazuhiko NAMBA, Tokihiro FUKATSU

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   84 ( 5 )   321 - 331   2022.9

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Biosensing Method of Growth Diagnosis in Forcing Culture of Strawberry: Available Airflow Velocity for Monitoring of Young Leaves Reviewed

S. TSUBOTA, K. NAMBA, T. FUKATSU, H. NAITO, S. YAMADA, T. OTA

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   84 ( 4 )   229 - 237   2022.7

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Development of High-Speed Ridge Forming Seeder for Soybeans : Seeding and Cultivation Tests Comparing Prototype and Conventional Machine Reviewed

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   83 ( 3 )   192 - 199   2021.5

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Optimization of the Lighting Environment in Sawdust-Based Shiitake Cultivation : Effect of Light Timing on Fruit Body Development During the Culture Stage Reviewed

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   82 ( 6 )   642 - 649   2020.11

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Biosensing Method of Growth Diagnosis in Forcing Culture of Strawberry : Biological Indicators for Evaluating Growth Inhibition under Low Temperatures Reviewed

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   82 ( 6 )   593 - 600   2020.11

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Development of High-Speed Ridge Forming Seeder for Soybeans, Adapted to Moist Soil Conditions : Seeding Performance of Prototype Seeder Reviewed

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   82 ( 6 )   617 - 623   2020.11

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Development of High Speed Ridge Forming Seeder for Soybeans Adapted to Moist Soil Conditions : Investigations of Seeding Mechanism for Soybean Seeds Coated with Insecticide and Fungicide Reviewed

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   82 ( 2 )   129 - 137   2020.3

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Development of High Speed Ridge Forming Seeder for Soybeans Adapting to Moist Soil Conditions:—Study of Disk Cultivation Ridging and Seeding Mechanism— Reviewed

SHIGEMATSU Kenta, YAMADA Yuichi, GOTOH Takashi, NAMBA Kazuhiko

Journal of the Japanese Society of Agricultural Machinery and Food Engineers   81 ( 2 )   104 - 111   2019

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japanese Society of Agricultural Machinery and Food Engineers  

<p>In recent years, the Japanese government has encouraged soybean planting. However, the suitable seeding period is only for 2 weeks, and more than 80 % of soybean fields are converted from rice paddy. The purpose of this study was to improve existing seeding techniques for rapid and stable seeding of soybean in moist soil conditions. A machine that combines rotary cultivation, ridging, and seeding has previously been developed. However, operation speeds were as slow as 0.3-0.6 m/s, and seeding was not effective in the moist soil conditions. In this study, we tested an experimental machine with disk cultivation that achieved a maximum ridging speed of 2 m/s and a new, high seeding speed of 1.5 m/s, which ensured stable seeding.</p>

DOI： 10.11357/jsamfe.81.2_104

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Other Link： https://agriknowledge.affrc.go.jp/RN/2010926865

Development of Energy-saving Ventilation System Considering Inside and Outside Temperatures of a Sawdust-based Shiitake Cultivation Facility Reviewed

Kashino Yasuaki, Myokai Fumio, Namba Kazuhiko, Monta Mitsuji, Kanzaki Hiroshi

Journal of the Japanese Society of Taste Technology   16 ( 2 )   4 - 12   2018

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japanese Society of Taste Technology  

The objective of this study was to develop an energy-saving ventilation system for a Shiitake cultivation facility. While in the cultivation stage, the spawns generate heat and CO₂ during their growth. To maintain an optimal growth temperature and labor-safe CO₂ concentration, an air conditioner and ventilation must employed. For energy saving, a heat exchange ventilator is widely used. For a more efficient utilization of this ventilator, we focused on two modes: heat exchange and normal ventilation. When the room temperature is higher than the outside temperature, using cool air with normal ventilation benefits the air conditioner. Moreover, we propose that spawn heat may be used as a heat source with heat exchange ventilation, when the room temperature is low. To determine the ventilation mode, we designed a control unit considering the inside and outside temperatures of a cultivation facility. After operating this system for one year, the highest efficiency was observed at an outside average temperature of 10 to 15℃. Therefore, a 25 % energy saving was achieved in this cultivation facility in Tamano city, Okayama.

DOI： 10.11274/bimi.16.2_4

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Study of glutinous barley flour utilization for rice bread Reviewed

Kumiko Fujii, Kazuhiko Namba, Naoko Matsumoto

THE RESEARCH SOCIETY for DIEATARY HABITS   37 ( 3 )   142 - 148   2017

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Effects of the Cultivation Stage Temperature and CO2 Concentration on the Sawdust-based Culture Shiitake Yield Reviewed

Yasuaki Kashino, Fumio Myokai, Kazuhiko Namba, Mitsuji Monta, Hiroshi Kanzaki

Journal of the Japanese Society of Taste Technology   15 ( 1 )   5 - 11   2016

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Study of Bread Making Process Properties using Impact Crushing Milled Rice Flour : Relativity of Physical Properties and Sensory Evaluation Reviewed

Kumiko Fujii, Kazuhiko Namba

Journal of the Japanese Society of Taste Technology   14 ( 1 )   19 - 27   2015.7

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Mobile Quality Evaluation Robot for Making Agricultural Products Traceable

M.Monta, K.Namba

International Journal of Automation Technology   8 ( 2 )   238 - 242   2014

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Influence of Environmental Conditions on the Chrysanthemum Leaf Yellow Spot - Measurement of the Leaf Yellow Spot at Early Stage - Reviewed

Naoki Eguchi, Kazuhiko Namba, Mitsuji Monta, Tanjuro Goto

IFAC Proceedings Volumes   46 ( 4 )   366 - 371   2013

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.3182/20130327-3-jp-3017.00082

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A Study of the Properties of Bread Made from Rice Flour Produced by Impact Crushing : The Effects of Rice Flour Particle Size and Fermentation Conditions on Expansion Properties Reviewed

Kumiko Fujii, Mitsuji Monta, Kazuhiko Namba

Journal of the Japanese Society of Taste Technology   11 ( 1 )   20 - 28   2012.4

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衝撃式粉砕法による米粉の製パン性に関する検討 －米粉粒度と生地調製条件が生地膨張に及ぼす影響－ Reviewed

藤井久美子, 門田充司, 難波和彦, 笠井八重子

美味技術研究会誌   2011 ( 18 )   19 - 27   2011

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：美味技術学会  

衝撃式粉砕法による米粉について，粒度区分（100μm未満，100～150μm未満，150～212μm未満）と，加水量，混捏時間，加糖量，加塩量などのパン生地調製条件が発酵時の生地膨張に及ぼす影響を調べた。生地は，各区分の米粉に粉末グルテンを添加して調製した。<br>100μm未満の粒度では，損傷でんぷん率が最も高く，膨張に適する加水量も多く必要であり，膨張停止がやや早かった。混捏時間は少なくとも10分は必要であったが，150～212μm未満の粒度では，長く混捏すると膨張率が低くなり，大きい粒子がグルテンネットワークを損傷したと考えられた。<br>3区分とも，無糖であっても高い膨張率が得られたことから，米の食味を生かした製パンが可能であり，グルテン添加米粉パンが，主食として副食を伴う健康的な食事構成に結びつくものと考えられた。

DOI： 10.11274/bimi2002.2011.18_19

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画像を用いたパン生地膨張過程の計測 Reviewed

藤井久美子, 大田真平, 難波和彦, 門田充司

美味技術研究会誌   2011 ( 18 )   28 - 33   2011

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：美味技術学会  

製パンにおいては，生地の材料や調製条件がその品質に大きく関わっており，発酵時に高い膨張を示す生地ほどパンの評価が高いとされている。しかし，これまでのパン生地膨張の計測は接触式の方法であり，本来の生地の挙動を正しく観察することは困難である。また，数値の読み取りにも誤差が生じる場合が多い。そこで本研究では，画像を用いて非接触かつ定量的にパン生地の膨張過程を3次元的に計測する手法を検討した。

DOI： 10.11274/bimi2002.2011.18_28

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Precision citrus production concept based on information from mobile citrus fruit grading robot, field-server, and satellite Reviewed

Y. Kohno, N. Kondo, S. Taniwaki, K. Namba, T. Nishi, M. Kurita

Acta Horticulturae   824   237 - 244   2009

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：International Society for Horticultural Science  

Since citrus is often grown on terraced orchards in west Japan, their qualities and yields are various, because of different environments such as temperature, humidity, solar radiation, precipitation, soil condition, tree age, and other conditions on different elevation fields. In this study, the concept of a mobile fruit grading robot and measurements from the robot are described. This robot consists mainly of a roller pin conveyor, two machine vision systems, an NIR inspection system, a GPS, and a travelling device. One or two operators can operate this robot for harvesting, because the robot keeps a constant distance between operators and the robot by laser sensors as it travels. Harvested fruit are put into the roller pin conveyor through two gates, as information of growth in northern or southern canopy is added for the fruit canopy location. One vision machine inspects harvested fruit, while the other monitors tree leaf color and canopy size. An NIR inspection system measures internal sugar content and a GPS records robot location. It is possible to accumulate fruit color, size, shape, defect, sugar content, tree leaf color, and canopy size into a database corresponding to tree location. Adding to this robot's information, analysis of satellite images is conducted and field-server information is collected. The producers' operation records can be input to the database with the satellite and field-server information. This database is used both for farming guidance to conduct tree management and for food traceability in relationship to safety and security in food distribution.

DOI： 10.17660/ActaHortic.2009.824.27

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SURFACE GLOSS MEASUREMENT ON EGGPLANT FRUIT Reviewed

V. K. Chong, T. Nishi, N. Kondo, K. Ninomiya, M. Monta, K. Namba, Q. Zhang, H. Shimizu

APPLIED ENGINEERING IN AGRICULTURE   24 ( 6 )   877 - 883   2008.11

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER SOC AGRICULTURAL & BIOLOGICAL ENGINEERS  

Surface gloss is one of the important quality factors affecting consumer opinion on purchasing eggplant fruits. The current manual gloss grading method is subject to human bias and the outcome is often very ambiguous. This study developed a sensing device consisting of two CCD monochrome cameras and three long tungsten lights and an associated quantitative method of measuring surface gloss of eggplant fruit using the device. Distinguishing various glossiness states of the fruit were made possible by analyzing the specular reflectance of the fruit surface. Specular reflection of the light on fruit surface was measured by digital image analysis method. Gradient filter was applied on the gray-level image for measuring magnitude of intensity changes. The algorithm consistency and validation test on the samples showed the algorithm was feasible of quantitatively, assessing eggplant fruit surface gloss with an accuracy rate of 0.806. Details of the sensing devices, outline of the algorithm and preliminary, results are presented in this article.

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FEATURES EXTRACTION FOR EGGPLANT FRUIT GRADING SYSTEM USING MACHINE VISION Reviewed

V. K. Chong, N. Kondo, K. Ninomiya, T. Nishi, M. Monta, K. Namba, Q. Zhang

APPLIED ENGINEERING IN AGRICULTURE   24 ( 5 )   675 - 684   2008.9

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER SOC AGRICULTURAL & BIOLOGICAL ENGINEERS  

Machine vision based grading for agricultural crops has been well developed and accepted as an attractive grading method. However, machine vision based grading for eggplant fruit is not available yet. This study reports oil the attempt to develop an eggplant grading machine using six CCD cameras as the sensing device. Feature extraction algorithms were developed to extract eggplant&apos;s features, i.e., length, diameter, volume, curvature, color homogeneity, calyx color, calyx area, and surface defect. The system could acquire six images per fruits covering the entire surface of the eggplant fruits. All agreement rate Of 78.0% was achieved in the feasibility study where the machine vision based grading was compared with manual grading. The throughput of the developed system was 0.3 second per fruit. Details of the system, an outline of the algorithm, and performance results are reported in this article.

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Construction of Virtual Low-Noise Space in Noisy Agricultural Facility for Safety and Comfort Reviewed

SHIIGI Tomowo, KONDO Naoshi, NINOMIYA Kazunori, KURITA Mitsutaka, NISHI Takao, NAMBA Kazuhiko, SHIMIZU Hiroshi, NISHIZU Takahisa

Engineering in Agriculture, Environment and Food   1 ( 2 )   77 - 83   2008

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Asian Agricultural and Biological Engineering Association  

Many types of agricultural facilities have been constructed at many places around the world. Although most of the operations are mechanized at these facilities, high noise from mechanical systems often prevents operators from discharging their duties efficiently and results in an unsafe environment. Virtual low-noise space is defined as the space required by operators in order to smoothly communicate in a high-noise environment, i.e., they feel as though they are working in a low-noise environment. The virtual low-noise space has three functions: to reduce the noise around the operators' ears, to communicate by speech without noise, to recreate the audio image on the basis of the operators' mutual positions. In this research, virtual low-noise space was constructed using noise-canceling headphones, microphones, a TV camera, and computers.

DOI： 10.11165/eaef.1.77

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Development of mobile eggplant grading robot for dynamic in-field variability sensing: Manufacture of robot and performance test Reviewed

Vui Kiong Chong, Mitsuji Monta, Kazunori Ninomiya, Naoshi Kondo, Kazuhiko Namba, Eichi Terasaki, Takao Nishi, Tanjuro Goto

Engineering in Agriculture, Environment and Food   1 ( 2 )   68 - 76   2008

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier B.V.  

A machine vision-based mobile eggplant grading robot was developed as a model to sense and log essential data needed for precision farming and traceability of agricultural crops. The robot consisted of battery railcar, trailer, grading mechanisms including manipulator, end-effector, machine vision and divider. Manually operated, the robot moved along crop ridges during the harvesting process with the grading mechanisms all mounted on the trailer. The robot sensed and logged the field spatial variability dynamically by grading manually harvested eggplant fruit of individual tree. This paper presents the details of manufactured robot and results of the performance test conducted. Test results showed that the robot was feasible for field spatial variability sensing in greenhouse.

DOI： 10.1016/S1881-8366(08)80005-5

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An illumination system for machine vision inspection of agricultural products

Naoshi Kondo, Kazuhiko Namba, Kentaro Nishiwaki, Peter P. Ling, Mitsuji Monta

2006 Portland, Oregon, July 9-12, 2006   063078   2006

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Publishing type：Research paper (international conference proceedings)   Publisher：American Society of Agricultural and Biological Engineers  

DOI： 10.13031/2013.20882

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Study of Efficient Lighting Periods Based on Plant Stoma Reaction

Kazuhiko Namba, Naoshi Kondo, Mitsuji Monta, Akira Sasao

2006 Portland, Oregon, July 9-12, 2006   064096   2006

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Publishing type：Research paper (international conference proceedings)   Publisher：American Society of Agricultural and Biological Engineers  

DOI： 10.13031/2013.21116

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Tele-robotics in Agriculture -Tomato Harvesting Experiment-

Monta, M, Kobayashi, K, Hirai, T, Namba, K, Nishi, T

Agricultural and Bio-systems Engineering   2005

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Study of Efficient Lighting Conditions Based on Plant Stoma Reaction

NAMBA Kazuhiko, KONDO Naoshi, MONTA Mitsuji, SASAO Akira

Shokubutsu Kojo Gakkaishi   16 ( 4 )   165 - 172   2004.12

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：JAPANESE SOCIETY OF AGRICULTURAL, BIOLOGICAL AND ENVIRONMENTAL ENGINEERS AND SCIENTISTS  

The objective of this study was to detect the plant stoma response under the lighting conditions of continuous and 1 to 15 minutes of lighting. In this study, a real-time measurement system was developed to observe a living plant stoma continuously for a long period in a growth chamber, using a microscope and a color TV camera. A video recording system was adopted to obtain details of stoma movement, and images were captured every 30 seconds. From the experimental results, it was observed that the stoma opened slowly 5 minutes after the lights were turned on, and then opened rapidly until it reached the maximum pore size. In guard cells, light stimulus activates a proton pump, the resulting hyperpolarization of the plasma membrane opens voltage-sensitive K⁺ channels, and then the water entering the guard cells opens the stoma after the K⁺ ions have entered. This process may cause 5 minutes of delay, and delay was also observed after the light was turned off. Ten minutes of lighting opened the stoma to the maximum size, as well as 5 minutes of lighting with a 30-minute interval. For better utilization of lighting, these on/off controls were suggested to give a 14% production benefit with 8.3% more energy input.

DOI： 10.2525/jshita.16.165

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Microscopic Imaging Measurement of Stomatal Reaction under Environmental Condition Change

NAMBA Kazuhiko, KONDO Naoshi, MONTA Mitsuji, SASAO Akira

JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY   66 ( 5 )   63 - 73   2004.9

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Language：Japanese   Publisher：The Japanese Society of Agricultural Machinery and Food Engineers  

The purpose of this study was to create a mathematical model for a responding process of a plant stoma to a given environmental condition aiming at plant growth control. A real-time measurement system was developed to observe a living plant stoma continuously for a long period in a growth chamber, using a microscope equipped with a color TV camera. Sixteen treatments were investigated by changing PPFD (Photosynthetic Photon Flux Density), CO₂ concentration, temperature and humidity, under the condition that the light was turned on and off every 6 hours. From the experimental results, it was observed that the stoma response was drastically changed by the environmental conditions and that the transient response with the 1st-order lag element could be adopted for the stoma response in cases of a higher PPFD and higher temperature. It was also observed that the stoma widely opened at a lower CO₂ concentration.

DOI： 10.11357/jsam1937.66.5_63

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Measurement of Plant Stomas under Several CO_2 Conditions using Microscopic Images

NAMBA Kazuhiko, KONDO Naoshi, MONTA Mitsuji, SASAO Akira

Shokubutsu Kojo Gakkaishi   16 ( 2 )   41 - 49   2004.6

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：JAPANESE SOCIETY OF AGRICULTURAL, BIOLOGICAL AND ENVIRONMENTAL ENGINEERS AND SCIENTISTS  

The objective of this study was to create a model of the plant stoma response process under CO₂ conditions (100 to 3000ppm) after lighting. In this study, a real-time measurement system was developed to observe living plant stomas continuously for a long period in a growth chamber using a microscope and a color TV camera. Six treatments were conducted by changing the CO₂ density, ranging from 100 to 3000ppm, under the conditions of a 2-hour on/off light cycle. From the experimental results, it was observed that the pore size was drastically changed in response to the CO₂ conditions. Lower CO₂ density caused larger-size pores under conditions of less than 1000ppm CO₂ density, while the pore size was almost constant under conditions of greater density. With CO₂ density of over 2000ppm, pores continued opening after 60 minutes had elapsed. The transient response with the 1 st-order lag element could well express the stoma response, and its desired value had a high correlation with CO₂ density.

DOI： 10.2525/jshita.16.41

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Semiautomatic planting machine based on physical properties of the rush seedling

M Monta, J Suyama, K Namba

JARQ-JAPAN AGRICULTURAL RESEARCH QUARTERLY   38 ( 1 )   43 - 48   2004.1

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Language：English   Publisher：JAPAN INT RESEARCH CENTER AGRICULTURAL SCIENCES  

The purpose of this study is to develop a planting machine for rush seedlings. In rush seedling production systems, the use of plug seedlings has been widely popularized in Japan. However, the planting operation requires a great deal of labor and takes a long time because a large quantity of seedlings that have a few main stems and a bud are individually picked from the mother plants, and are planted in a tray by manual operations. Therefore, it is desirable to introduce machinery into the planting operation,. In this paper, a semiautomatic planting machine was manufactured based on the physical properties of the rush seedling and planting experiments were carried out. The machine mainly consisted of planting unit, tray shifter, controller and air compressor. From the results of planting experiments, the success rate for planting was approximately 90%.

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Three dimensional sensing system using laser scanner Reviewed

M. Monta, K. Namba, N. Kondo

ASAE Annual International Meeting 2004   1195 - 1205   2004

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Harvesting Robot for Strawberry Grown on Table Top Culture (part 2) Harvesting Robot with a Suspended Manipulator under Cultivation Bed

ARIMA Seiichi, MONTA Mitsuji, NAMBA Kazuhiko, YOSHIDA Yuichi, KONDO Naoshi

Shokubutsu Kojo Gakkaishi   15 ( 3 )   162 - 168   2003.9

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Language：Japanese   Publisher：JAPANESE SOCIETY OF AGRICULTURAL, BIOLOGICAL AND ENVIRONMENTAL ENGINEERS AND SCIENTISTS  

In part 1 of this series, a harvesting robot consisting of a 5 DOF polar-coordinate manipulator, a harvesting end-effector using sucking force, a visual sensor and a traveling device was manufactured and tested with strawberry grown on table top culture. From the results, it was observed that the table top culture was a suitable cultivation method for robotic operations because there were few obstacles around the target fruits, and that harvesting using a sucking force inflicted no damage on the fruits. However, it took the robot 14 to 20 seconds to harvest a single fruit because of the complicated construction and control method of the manipulator. <BR>In this study, a cartesian coordinate manipulator suspended under the planting bed of strawberry was employed in order to simplify construction and control method of the manipulator intended for practical use. The robot was capable of moving along the planting bed without a traveling device because one prismatic joint of the manipulator played the role of a traveling device. Furthermore, depth measurement by a visual sensor was simplified because distance between the robot and the fruits was kept approximately constant by suspending the robot under the planting bed. Harvesting experiments were conducted in a greenhouse by using the manipulator equipped with an improved end-effector and a visual sensor. From the results, time required to harvest a fruit was reduced to around 10 seconds because of the simplified construction and control method of the manipulator.

DOI： 10.2525/jshita.15.162

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Robotic Vision for Bioproduction Systems

Mitsuji Monta, Naoshi Kondo, Seiichi Arima, Kazuhiko Namba

Journal of Robotics and Mechatronics   2003

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Three-dimensional sensing system for agricultural robots Reviewed

M Monta, K Namba

PROCEEDINGS OF THE 2003 IEEE/ASME INTERNATIONAL CONFERENCE ON ADVANCED INTELLIGENT MECHATRONICS (AIM 2003), VOLS 1 AND 2   1216 - 1221   2003

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

A three-dimensional sensing system that consisted of a laser scanner and a lift was developed for agricultural robot to capture precise external information. The laser scanner was moved vertically by the lift to collect three-dimensional distance information around the robots. In the experiments by using a laser scanner and a color camera, each tomato fruit in a same cluster was discriminates successfully. Furthermore, the sensing system detected not only objects but also human motion around a robot when infrared sensors were added to the sensing system.

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農業分野におけるテレロポの試み:トマト収穫を対象とした基礎実験

門田 充司, 橋本 幸太, 三竿 暢広, 毛利 健太郎, 難波 和彦, 西 卓郎

農業機械学会誌   65   419 - 420   2003

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Language：Japanese   Publisher：The Japanese Society of Agricultural Machinery and Food Engineers  

DOI： 10.11357/jsam1937.65.Supplement_419

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External Sensing System for Human Cooperative Agricultural Robots. Part 1. Sensing System using Laser Scanner.

門田充司, 鐘ケ江修司, 毛利建太郎, 難波和彦, 近藤直

植物工場学会誌   14 ( 1 )   2002

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External Sensing System for Human Cooperative Agricultural Robots. (Part 2). Discrimination of Human Bodies and Obstacle Avoidance Control of Manipulator.

門田充司, 鐘ケ江修司, 毛利建太郎, 難波和彦, 近藤直

植物工場学会誌   14 ( 2 )   2002

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Effective Utilization of Natural Energy in Agriculture : Use of Solar Energy for Heating a Seedling Greenhouse at Night

ELBATAWI Ibrahim E. A., MOHRI Kentaro, NAMBA Kazuhiko

Journal of the Japanese Society of Agricultural Technology Management   5 ( 2 )   1 - 6   1998

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Language：English   Publisher：Japanese Society of Agricultural Technology Management  

The temperature at night in the spring in Okayama City is under 20 ℃ the majority of the fine which is not adequate in order to germinate certain vegetable seeds. In order to promote germination and seedling growth at night, a heating system for a seedling greenhouse was constructed for this study. The above system is composed of a solar collector, a storage tank and a heat exchanger. The performance of the solar collector and heat exchange methods were tested and it was found that there was sufficient solar energy for heating a seedling greenhouse overnight. The quantity of heat delivery that was collected from solar radiation via a solar collector was approximately 50% per day. Pumpkin, eggplant, and tomato seeds were used in this study, and the promotion of germination was observed for all seeds in heating greenhouse (A) at night.

DOI： 10.20809/seisan.5.2_1

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Study on Drying of Lavers Using Far-infrared Ray (Part 2) : Effect of Drying Item on Dried Laver Qualities

LIU Huoqing, MOHRI Kentaro, NAMBA Kazuhiko

Journal of the Japanese Society of Agricultural Technology Management   4 ( 2 )   55 - 60   1997

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Language：Japanese   Publisher：Japanese Society of Agricultural Technology Management  

It is the object of this study to find a method of high quality drying by far-infrared ray. This paper clarified the relationship between the chromatic properties of surface and the qualities on the dried lavers. The dried lavers had a high correlation between the grading and the chromatic properties of surface in the hue and luster values. Therefore, it was considered that the values of hue and luster can be used for the grading of dried lavers. A drying apparatus with the bar heater of far-infrared ray, was prepared for this experiment and the effects of the drying factors were analyzed. The surface temperatures of far-infrared heater and the air flow on the laver surface are the important factors for producing high quality lavers, and their combinations of drying conditions were clarified by this research.

DOI： 10.20809/seisan.4.2_55

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Study on Bruise Detection on Apples Using Color Image

CHEN Yong Bo, MOHRI Kentaro, NAMBA Kazuhiko

Journal of the Japanese Society of Agricultural Technology Management   4 ( 2 )   19 - 28   1997

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Language：English   Publisher：Japanese Society of Agricultural Technology Management  

The possibilities of bruise detection on fruits by color images were analyzed by using two kinds of apples (Fuji and Oorin). Six kinds of colorimetric systems {RGB, HIS, Lab, xy, rg and U^*V^*W^*) were calculated by the tristimulus color theory on a camera after measuring the spectral reflections on apples. The bruises on Oorin apples could be easily classified by using RGB, XYZ, HIS, Lab, rg or U^*V^*W^*. On the other hand, it was difficult to detect the bruises on the Fuji apples.

DOI： 10.20809/seisan.4.2_19

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Study on Drying of Lavers Using Far-infrared Ray

LIU Huoqing, MOHRI Kentaro, NAMBA Kazuhiko

Journal of the Japanese Society of Agricultural Technology Management   3 ( 2 )   31 - 35   1996

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Language：Japanese   Publisher：Japanese Society of Agricultural Technology Management  

This report describes drying methods for laver so that it can dry with high quality and efficiency. A far-infrared drying equipment was made with a bar heater. The drying characteristics of laver were tested by this epuipment. The following results were obtained, 1. During laver drying,the wave lengths which are selectively absorbed by the lavers existed in emitted far-infrared rays. 2. The constant drying rate and the falling drying rate periods clearly appeared in the drying characteristics of lavers. The constant drying rate period was an effective period in order to decrease the drying times. 3. The drying of lavers needed an air stream flowing along on the laver surface. The optimum velocity of the air stream was 0.75 m/s, and the drying times were shorter on the laver surface to circulate the air of drying room.

DOI： 10.20809/seisan.3.2_31

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EFFECT OF MAGNETIC FIELD ON GERMINATION AND PLANT GROWTH

K. Namba, A. Sasao, S. Shibusawa

Acta Horticulturae   ( 399 )   143 - 148   1995.3

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Publishing type：Research paper (scientific journal)   Publisher：International Society for Horticultural Science (ISHS)  

DOI： 10.17660/actahortic.1995.399.15

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