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Volume 64, Issue 3
Displaying 1-18 of 18 articles from this issue
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N. ISHIZUKA2002 Volume 64 Issue 3 Pages 1-2
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
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2002 Volume 64 Issue 3 Pages 4-16
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
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For Increasing the Number of MembersNoriaki ISHIZUKA, Makoto DOHI, Masamichi DAIKOKU, Akira YANO, Kazuyosh ...2002 Volume 64 Issue 3 Pages 17-25
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
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K. FURUKAWA2002 Volume 64 Issue 3 Pages 26-27
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 3 Pages 28-29
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
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Air Flow Analysis in Grain Separation TunnelKazuyoshi NONAMI, Mikio UMEDA, Yoshinori YUZAKI, Atsushi KIMURA2002 Volume 64 Issue 3 Pages 45-50
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study carried out an analysis of air flow in grain separation tunnel under the condition of no material to be separated in order to understand the flow of separation-wind. As the result of a visual experiment using water model which is replaced air with water, the flow pattern of separation-wind from the main separation fan to the suction fan was made clear. An inverse flow at a suction and an exhaust sides of the suction-fan for dust was observed. For stabilization of the flow the shape of the suction fan case was improved using the water model. Improvement of the shape of the case result in larger discharge and pressure coefficients than the current suction fan, and the maximum efficiency increased about five times.View full abstractDownload PDF (5664K) -
Terminal Velocity of Grain and WastesKazuyoshi NONAMI, Mikio UMEDA, Yoshinori YUZAKI, Atsushi IMURA2002 Volume 64 Issue 3 Pages 51-55
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSPart 1 presented the analysis of the air flow at non-material in grain separation tunnel. In order to discuss the behavior of grain and wastes in the flow of separation wind, it's very important to measure the terminal velocity of grain and wastes. This paper discussed to make flying of grain and wastes easy in the air flow by measuring the terminal velocity. In this result, it was proved itself difficult to separate grains with primary branches and straws in the grain tank from single grain, because the terminal velocity of grain with primary branches and straws was more than single grain. And it was plain the suitable limits of the separating wind velocity is from 2.3m/s to 6.5m/s in accordance with the result that the max limit of terminal velocity of released wastes from the suction fan was 2.3m/s and the minimum limit of that of single grain was 6.5m/s.View full abstractDownload PDF (4640K) -
Analysis of the Behavior of Grain and Wastes in Grain Separation TunnelKazuyoshi NONAMI, Mikio UMEDA, Yoshinori YUZAKI, Atsushi KIMURA2002 Volume 64 Issue 3 Pages 56-62
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSPart 1 presented the analysis of the air fluid at non-material in Grain separation tunnel. Part 2 discussed to make flying of grain and wastes easy in the air flow by measuring the terminal velocity. This paper presents the numerical analysis of the behavior of grain and wastes in Separation tunnel based on the result of part 1 and part 2, and the analysis of the practical behavior in the 2 dimensional model of Separation tunnel. In this result, it found that the possibility to predict the whole behavior of grain and wastes by the numerical analysis. And it found that the separation between grain and wastes was completed on the chaffer sieve in a whole part, but the change of chaffer sieve opening influence the wastes mixing of the first gate and second gate, and grain loss of third gate.View full abstractDownload PDF (9883K) -
Yuichi KOBAYASHI, Masaru KASHIWAZAKI, Kenji IMOU, Hiroshi TAKENAGA2002 Volume 64 Issue 3 Pages 63-69
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe experiments were conducted to develop a method of direct monitoring of carbonizing processes. Test pieces of wooden Biomass were heated in a closed furnace, and the changes in electric properties were investigated by means of impedance measurement. The impedance was measured in the frequency range from 100Hz to 15MHz. Temperature and concentrations of the generated gas were also measured, and it found the starting and the end points of the thermal decomposition. Vector impedance trajectories plotted on a complex plane were classified in three types according to the stages of the thermal decomposition. Those three types could be represented by variants of a standard type. The results showed the possibility of monitoring the carbonizing processes by impedance measurement, and an equivalent circuit was proposed in this study.View full abstractDownload PDF (3491K) -
Masayoshi TODA, Aiguang LIN, Sadami YADA2002 Volume 64 Issue 3 Pages 70-78
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper describes dynamical analysis of underwater motions of a scallop shell for the purpose of developing a method of controlling the posture of scallop valves, which is necessary as a pre-process to the automatic holing process for scallop culture using the ear-hanging method. The phenomenon, which the authors have discovered, that under some appropriate conditions most scallop shells thrown into the static water turn so as to let their left valves direct vertically upward is focused on. The dynamical model for the scallop's underwater motions of interest is derived and is evaluated by conducting some experiments and simulations. The results show that the derived dynamical model successfully represents the motion of interest and further the principle of the motion has been clarified. Moreover, the results of simulation under a variety of conditions show the motion of interest is available for the purpose.View full abstractDownload PDF (1548K) -
Combustion Characteristics in Lower Load of a Dual Fueled CGS Using Intake Air Heating and EGRJong-Soo PARK, Hideo TERAO, Kohta ISHII2002 Volume 64 Issue 3 Pages 79-85
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the utilization of the dual fueled cogeneration system (CGS) operated with Biogas and gas oil, the CGS has a problem that its thermal efficiency is decreased under dual fuel operation in lower loads. It is supposed that the causes of the problem are the emission of unburned methane that loses energy of biogas, and the decline of combustion speed which decreases conversion efficiency from heat to mechanical power. To solve these problems, the CGS was remodeled with the intake air heating and the exhaust gas re-circulation (EGR) to improve methane combustion. The test results indicate that the intake air heating is effective on improvement of combustion and on reduction of unburned methane emissions although it increases NOx emissions. EGR also accelerates combustion of methane due to intake air temperature higher, and reduces NOx emissions because it decreases O2 concentration of charge. Therefore, it is concluded that EGR is the effective remodeling for dual fueled CGS operated with biogas and gas oil.View full abstractDownload PDF (1164K) -
Sutrisna Wijaya I MADE Anom, Sakae SHIBUSAWA, Akira SASAO2002 Volume 64 Issue 3 Pages 86-93
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe study to evaluate the sampling design were conducted in a 100m×50m of paddy field located in Kyoto, and in a 156m×77m of paddy field located in Ishikawa prefecture, Japan. The variability of five soil parameters: moisture, SOM, NO3-N content, pH and EC was described by collecting the soil reflectance at interval of 1m×5m and 1m×10m for Kyoto and Ishikawa field, respectively. The Kriged standard errors of seven subsets for Kyoto data, and eight subsets for Ishikawa data resulted from different scanning intervals, were calculated. As a result, the cumulative Kriged standard error decreased with an increment in sampling size, followed by slightly increase after a minimum value was achieved. The optimal sampling sizes for mapping of each soil parameters are presented.View full abstractDownload PDF (4090K) -
Effectiveness of Elliptical Element modelMotokatsu SUZUKI, Eiichiro SAKAGUCHI, Shotaro KAWAKAMI, Koji TAMAKI2002 Volume 64 Issue 3 Pages 94-100
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSComputer simulation has possibility to give us useful information in development and improvement of grain processing technology. In discrete element method using elliptical elements a method to easily obtain a contact point in particle contact was proposed. Experimental results using a small scale model and simulation results using circular and elliptical elements at the same scale on shaking separation phenomenon of paddy and brown rice were compared in the change of separation condition with the inclined angle of a separation box. Good agreement between experimental and simulation result using elliptical elements suggested effectiveness of the elliptical model in a design of grain processing technology.View full abstractDownload PDF (5222K) -
Sensing in Tea Manufacturing ProcessHitoshi YOSHITOMI, Osamu SUMIKAWA, Shinzo TANAKA, Fujio NAKANO2002 Volume 64 Issue 3 Pages 101-108
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSSome methods to detect tea states in real time during tea manufacturing process were showed in succession to the previous report. The estimate of the moisture content of tea leaves by the electric resistance of tea leaves and the measurement of the volume of tea leaves as a shaping index in final rolling process in which the tea leaves are shaped simultaneously with drying are described in this report. We also discussed the influence of the measurement error to the estimate of the moisture content of tea leaves on the moisture content estimate by the absolute humidity difference between supplied air and exhaust air which was showed in the previous report.View full abstractDownload PDF (1255K) -
Toshikazu KAHO, Michihisa IIDA, Mikio UMEDA, Choung Keun LEE2002 Volume 64 Issue 3 Pages 109-114
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSVariability of grain yield in a paddy field was measured while harvesting rice using a combine with a grain flow sensor. However, since the measurement accumulates errors, it is difficult to determine the whole grain yield in the field. Therefore, a mass sensing equipment has been developed in order to measure the mass of container loading on a vehicle. It consists of three load cells and two inclination sensors. The equipment can sense the inclination of vehicle and the mass of container. Field tests showed that the equipment could measure the mass of grain at the accuracy of ±9kg in the case of less than 2° inclination of vehicle.View full abstractDownload PDF (3313K) -
Toshinori KIMURA, Yoriko ISHIDA, Nozomi IHARA, Yuka SAITO2002 Volume 64 Issue 3 Pages 115-120
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe authors investigated the degradation behaviors of poly (lactic acid) (PLA) products used in farming by an evaluation method under composting. Food residue was used as a composting material, and test pieces of PLA products were left in composting reaction. The degradability of PLA was measured directly after collection of the test pieces from a reactor. We found that PLA soft film samples degraded within 3 weeks and both PLA band samples and PLA rope samples degraded within G weeks. Thus, all the PLA products rapidly degraded under composting conditions.View full abstractDownload PDF (7559K) -
Yoriko ISHIDA, Nozomi IHARA, Yuka SAITO, Naoto SHIMIZU, Toshinori KIMU ...2002 Volume 64 Issue 3 Pages 121-125
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSRecently, various PLA products for agricultural uses have appeared in the market. The purpose of this study is to propose a simplified evaluation method based on the particular degradation characteristics of PLA in primary biodegradation, which could predict degradation time by composting. The authors compared the results with the verification results by composting. We found that PLA products degraded within the expected periods under composting condition. Also, a primary degradation of PLA was greatly influenced by sample shape and polymer structure, but the influence on an ultimate degradation was small. As a result, it was considered that the simplified evaluation method could be effective method to find degradation time of PLA by composting.View full abstractDownload PDF (2825K) -
Control System for Tracking Teat Movement and Manipulability of Robot ManipulatorMitsuru HACHIYA, Akira HIRATA, Takashi KUWANA, Yoshitaka IBARAKI, Yosh ...2002 Volume 64 Issue 3 Pages 126-133
Published: May 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper deals with designing a positional feedback controller for a manipulator with 3rotational joints on a X-Y plane that follows the teat movement. The frequency response of 1st 2nd and 3rd joint of the manipulator indicated that the natural frequency of the axes were 3.5Hz, 4.5Hz and 4.5Hz, respectively. Although the gain rate was set to five to stabilize the control system, it can fully follow the motions up to 0.7-0.9Hz. Positional commands are sent to the servo drivers at intervals 20ms via the positioning pulse distributor so that the deviation is less than the set value. We assume the manipulator, based on of the frequency of teat motion obtained from our preliminary study, will not encounter teat movement during practical use. The manipulator with a 3-D. O. F. is essentially the same as one with a 2-D. O. F., but with a restricted manipulator range in the 3rd joint when parallel to the cow's body axis. This allows the inverse kinematics of the 3-D. O. F. system to be expressed more simply. Furthermore, we showed that the manipulator worked most efficiently when the manipulator's manipulability measure was over 80% in the operational space. This means that the manipulator will know the contours and movements of the cow's body so that it can quickly and easily attach teat-cups to the udder.View full abstractDownload PDF (2723K)
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