JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY
Online ISSN : 1884-6025
Print ISSN : 0285-2543
ISSN-L : 0285-2543
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Volume 49, Issue 6
Displaying 1-12 of 12 articles from this issue
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  • Research, Education and International Technical Cooperation of Japanese Agricultural Machinery
    From a Viewpoint of an Internal Training
    VAN HAI LAM
    1987 Volume 49 Issue 6 Pages 523-524
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.523
    JOURNAL FREE ACCESS
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  • Some Problems of Agricultural Mechanization in a Developing Country
    From Technical Co-operation Site
    Kensuke AMANO
    1987 Volume 49 Issue 6 Pages 525-526
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.525
    JOURNAL FREE ACCESS
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  • Study on Bio-gas and Charcoal Generator (IV)
    Synthesis of SiC from Charcoal of Rice-Husk
    Jinzo NAGAHIRO, Ken HIGUCHI
    1987 Volume 49 Issue 6 Pages 527-536
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.527
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    The charcoal of rice-husk was examined in order to evaluate the availiability of it as raw materials for SiC synthesis. The ten kinds of charcoal samples generated by the indirect pyrolysis of the compressed rice-husk at 500-1000°C are different in C/SiO2 ratio. The results are summarized as follows:
    (1) The powdered SiC was sintered by the atomospheric sintering method. The produced SiC has a density equivalent to 93% for the theoretical density.
    (2) The synthetic temperature of 1700°C for the ground charcoal is lower by 500°C than the ordinary method using the ground pitch-coke and quartz silica. It is profitable from an energy-saving viewpoint.
    (3) The pyrolysis conditions for the compressed rice-husk as raw materials for SiC synthesis, namely, the thermal decomposition temperature and the time required for thermal decomposition, are Td≈900°C and td, req≈10-15min, respec-tively. The rice-husk charcoal, whose C/SiO2 ratio is approximately 0.65-0.7, is generated under these conditions.
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  • Research on Steering Method of Small Mower-Loader (Part 2)
    Examination of Turning Trajectory of Several Steering Methods
    Tomohiro TAKIGAWA, Nobuki YAMAHA, Michio IRIE, Kazutomo OKUI
    1987 Volume 49 Issue 6 Pages 537-546
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.537
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    To examine the relationship between steering methods of small mower-loader and its working capacity and operation accuracy, trajectories of 90 degree turn of vehicles with front mounted mower having different steering methods were calculated and compared. The steering methods adopted were front steering, rear steering, coordinated steering, articulated frame steering and the developed steering system described as dual steering in the previous report. It was concluded from the calculation that articulated frame vehicle having an articulate point at the center of two axles was most favorable for small mower-loader operation with front mounted mower or front mounted mower combined with rear mounted pick-up unit, and when the articulate position could not be set at the center of two axles, better operation can be expected by use of the dual steering method.
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  • The effect of moisture content and temperature on specific heat of cereal grains measured by DSC
    Satoshi MURATA, Akio TAGAWA, Sadato ISHIBASHI
    1987 Volume 49 Issue 6 Pages 547-554
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.547
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    The specific heat of cereal grains over 8 species were measured by DSC in the range of about 10°C to 70°C of temperature, and about 0% to 35% of wet basis moisture content. The results suggested a linear relationship between the specific heat and moisture contents, and a quadaratic relationship between the specific heat and temperatures. On these base a new five parameter polynomial equation relating moisture content and temperature were developed. The parameters were determined by the method of least square, and the calculated curves fitted the observed curves well.
    The parameters of 8 species of grain were summarized in table 2 with the equation.
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  • Energy Analysis in the Production of Bread
    Spaghetti and Senbei (Rice Cracker)
    Yasuhisa SEO, Hiroshi MORISHIMA
    1987 Volume 49 Issue 6 Pages 555-562
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.555
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    An energy accounting study was conducted to find possible energy recovery in the production of foods such as bread, spaghetti and rice cracker (senbei).
    The energy accounting was restricted to in-plant energy use. Those foods are merle of grain flour and needed thermal operations to be processed. Senbei is one of Japanese traditional and popular cookies made of rice flour.
    The energy requirement in the production of bread, spaghetti and senbei was 2.06, 3.33 and 11.43MJ/kg product respectively. Baking used about 40% of the total energy in bread production, and drying in the production of spaghetti and senbei consumed 65.2% and more than half of the total energy respectively.
    These energy intensive operations in each of the food productions also rejected a large amount of the thermal energy from an oven and a dryer with exhausted air. Thus, the exhausted air could be a source of the energy recovery and be used for an absorption refrigeration system for a bread cooler which will replace the current refrigeration unit. This problem was left for a future study.
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  • Studies on Fruit Recognizing Visual Sensor (II)
    Calculation of the Most Suitable Wavelength Bands and Discriminating Experiment
    Naoshi KONDO, Shunzo ENDO
    1987 Volume 49 Issue 6 Pages 563-570
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.563
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    In the Part I of this series of study, it was reported that R, G, B filters were effective for detecting fruits whose colors were different from their leaves color by a visual sensor.
    In this paper, spectral refrectances of fruits and leaves were measured and a pair of wavelength bands where difference of the sensor output between each fruit and its leaves was the largest was obtained by calculating the peak wavelengths and the band widths at half height of interference filters in order to develop a visual sensor which could discriminate fruits whose colors were not only different from but also simular to their leaves color. Besides, discrimination of fruits from their leaves was experimented by use of the interference filters and the visual sensor which was used in the previous experiment, and it was confirmed that the pair of wavelength bands was more effective by comparing with the results in the previous report.
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  • Studies on Three-Point Linkage for Rotary Tilling Tractor (III)
    Link Force
    Takao IKEMI, Jun SAKAI, Eiki DOI
    1987 Volume 49 Issue 6 Pages 571-579
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.571
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    The mechanical characteristics of links in three-point linkage of a rotary tilling tractor were investigated by analyzing the link force. In ordinary operation with links released free, the tensile and compressieve forces are exerted to the up perand lower links respectievely. However, in tilling of soft soil or in tilling with a narrow tilling pitch, these forces may be occasionally reversed. The mean link force may be expressed by a linear equation using the tilling torque. The lower the virtual hitch point becomes, the more the link force is intensified. When a tilling pitch increases, the link force also increases and demonstrates a cyclic pattern of variation.
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  • Studies on the Development of Farm Power from Solar Energy (III)
    Development of the Convection Type of Solar Pumping System
    Kenji IMOU, Osamu KITANI, Tsuguo OKAMOTO, Naoki SAKAI
    1987 Volume 49 Issue 6 Pages 581-589
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.581
    JOURNAL FREE ACCESS
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    A solar pumping test system was desingned, fabricated and tested. The system operates on a convection type of Rankine cycle. No pump to circulate working fluid is used in this system. The condensed working fluid is transferred intermittently using two solenoid valves. In this paper, cyclic processes of the system were studied theoretically, and the characteristics of the solar pump were investigated from the results of experiments.
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  • Rate of Respiration and its Drift of Some Okinawa Grown Vegetables and Cut Flowers
    Takayoshi AKINAGA, Yoshihiro KOHDA
    1987 Volume 49 Issue 6 Pages 591-597
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.591
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    It is essential to understand the rate of respiration governing the storage life of fresh fruits and vegetables so that the precooling facilities, cold storages, and handling operations can be designed for maximum efficiency. The rate of respiration is a good index for the quality of fresh produce, and can be measured nondestructively. In the past, considerable research has been reported in various scientific journals on fruits, vegetables and cut flowers. However, the measurement methods, maturity of the samples and time after picking had not been reported in detail. The data on the respiration rate of subtropical products in Okinawa had not been reported. Thus respiratory properties of some Okinawa grown vegetables and cut flowers were measured and clarified. Furthermore, it was clarified that the drift of respiration rate after the products were picked and the ambient temperature were related by using kidney beans and sweet corn samples.
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  • MOISTURE DISTRIBUTION OF CEREAL GRAIN IN POST-HARVEST PROCESSING
    Ching-Loong TSAI, Ritsuya YAMASHITA, Kiyokazu GOTO
    1987 Volume 49 Issue 6 Pages 599-604
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.599
    JOURNAL FREE ACCESS
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  • Translation and Proposal on ASAE Terminology for Traction and Transport Devices
    Jun SAKAI, Tadashi KISHIMOTO
    1987 Volume 49 Issue 6 Pages 605-610
    Published: 1987
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.49.605
    JOURNAL FREE ACCESS
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