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 52, Issue 6
Displaying 1-15 of 15 articles from this issue
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  • Latent Information in Data of Experiment Conditions
    S. NAMBU
    1990 Volume 52 Issue 6 Pages 1-2
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_1
    JOURNAL FREE ACCESS
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  • Studies on the Optimizing Control of Tractor Engine Performance (Part 1)
    Control System Design and Fundamental Experiments
    Jun SAKAI, Jiaolong LIU, Kei NAKAJI, Ki Dae KIM
    1990 Volume 52 Issue 6 Pages 3-10
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_3
    JOURNAL FREE ACCESS
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    The optimization of tractor engine performance was discussed from the viewpoint of power train control for tractor operation system. It was proposed that the control methods of tractor power train could be classified into three kinds according to the engine performance diagram, i. e, the highest working efficiency control, the highest fuel efficiency control and the optimum fuel efficiency control. The purpose of this series is to develop basic software and hardware of multipurpose control system based on the analysis on the control methods. In this paper, an experimental system was designed and constructed by using a tractor with a hydrostatic transmission as a control object.
    Furthermore, the desired values and the control inputs were obtained in order to develop computer control program. The effects of the parameters on the control system were also investigated. In the following paper, the field tests on the optimum fuel efficiency control will be reported.
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  • Studies on Adjustable Lug Type Traction Aid for Farm Tractor (Part 2)
    On the Field Performances
    Minoru KOMATSU, Hideo HIGUCHI, Kazuyoshi NONAMI
    1990 Volume 52 Issue 6 Pages 11-17
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_11
    JOURNAL FREE ACCESS
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    Various characteristics of the field performance of adjustable lug type traction aid for farm tractors developed by the authors were tested.
    It was found that the tractive performance was largely improved by the use of this device, and there was the effect of reducing soil compaction when tractors ran on tilled fields. Besides, many useful functions were found, for example, there are the effects of reducing sideslip and preventing overturn of tractors on slopes, and it can be utilized as the means of getting out of the immobilized state of tractors that occurs on soft ground and so on.
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  • Basic Studies on Vibration Characteristics of the Rubber Crawler System for Farm Machinery (Part 4)
    Vibration Characteristics and Appraisement of the Rubber Crawler System for Location Arrangement of the Track Rollers
    Eiji INOUE, Jun SAKAI, Shigeki INABA
    1990 Volume 52 Issue 6 Pages 19-26
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_19
    JOURNAL FREE ACCESS
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    A rubber crawler system of a Japanese combine harvester was reconstructed and used for the testing on pitch angles, bounce of the center of gravity, bounce acceleration in front of the center of gravity and vertical dynamic loading force acting on the track rollers for the different arrangements of track rollers. Then, the vibration characteristics of each track roller arrangement were estimated.
    Furthermore, it was certified through the comparison between experimental results and analytical simulation that this simulation method was useful as a computer software aided design to select a reasonable location arrangement of the track rollers in order to minimize the machine vibration.
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  • Development of a Carrier-Driving Type Gantry System
    Osamu KITANI, Tsuguo OKAMOTO, Tooru TORII, Satoshi YONEKAWA, Naoki SAK ...
    1990 Volume 52 Issue 6 Pages 27-34
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_27
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    A carrier-driving type gantry system which is more cost and energy saving than conventional gantry systems has developed. Main specifications of girder frame, carrier, rails, transposing device, driving unit and control unit were investigated. An FEM analysis was done to get a girder frame with minimum deflection under the maximum draft of 1250N of reduced tillage. A driving unit and 630W solar cell unit were designed for this load. Basic methods of field operations with this system were investigated and accuracy of operation were compared.
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  • Electronically-Controlled Pneumatic Precision Planter (Part 1)
    Electronic Seed Sensing and Evaluation of Metering Uniformity
    Isaac Kaaria INOTI, Kiyoshi NAMIKAWA
    1990 Volume 52 Issue 6 Pages 35-43
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_35
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    A detailed investigation into the accuracy of seed delivery by a seeding equipment necessitates a method for measuring the seeding uniformity of seeds after release from the metering mechanism. An electronic detector is described which detects accurately (±1%) a broad range of seeds. Operation is simple and requires no external sensitivity control. During application the coefficient of variation, misses and doubles/multiples in a sample run can be obtained continuously under static or dynamic situations. The method enables a reliable sample to be obtained and the results can be rapidly analyzed.
    Precision planting is necessary in order to improve and promote mechanical weed control, and thereby reduce environmental contamination caused by herbicides.
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  • Adjusting Method of Discharging Rate for Roll Type Fertilizer Applicator with Groove
    Hiroshi SHIMONASAKO
    1990 Volume 52 Issue 6 Pages 45-52
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_45
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    The relation between adjusting method and discharging rate of the fertilizer applicator was tested by using the several kinds of fertilizer whose physical properties were different. The results were as follows. Discharging rate can be approximated by linear regression to the open area of the shutter and by logarithmic regression to the travelling speed of the applicator. The correlation coefficient between discharging rate in volume and weight was in very high correlation to the bulk density of the fertilizer. The coefficient of variation for the discharging rate of the chemical fertilizer which was composed of highly uniform granules was less than that of others. It is clear that the requirement for the desirable fertilizer applicator is the constant efficiency to the capacity of the discharging adjustment equipment.
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  • Basic Studies on Soil Injector (Part 1)
    Effective Firming Load for Enclosing Chloropicrin in Soils
    Masafumi MITARAI, Toshio FURUCHI
    1990 Volume 52 Issue 6 Pages 53-60
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_53
    JOURNAL FREE ACCESS
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    The effective minimum firming load of the soil injector was studied for improving the control of soil pests and the safety in work operations. The changes of air permeability coefficients, rate of gas phase and diffusion rate of chloropicrin through soils against various firming loads were measured in laboratory, and it was proved that effective minimum firming load for enclosing chloropicrin in soils was about 80-100kPa.
    The correlations between vapour rate and diffusion of chloropicrin in soils were simulated by two diffusion models, and the results of these simulations showed that diffusion of chloropirin in soils slowed down remarkably when rate of gas phase decreased under about 20-30%. In practical experiments, the same results as the simulations were obtained.
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  • Development of a Self-propelled Electrostatic Non-heating Fog Machine and a Hollow Cone Electrode with Holes
    Masaki MATSUO, Zhuo SHENG, Toshitaka UCHINO
    1990 Volume 52 Issue 6 Pages 61-66
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_61
    JOURNAL FREE ACCESS
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    A self-propelled electrostatic non-heating fog machine was developed and tested for the purpose of the high-speed diffusion of the fog and the uniform spray deposition.
    Several holes of the electrode side wall decreased the wetting on inside wall. The optimum position, diameter and number of the holes were selected.
    The appropriate travel speed of the fog machine was 0.5m/min. By charging the fog, the under-surface depositions of the sample plates increased at all positions of the model plant.
    The holes increased the charge cloud current so that the charge performance were improved. By making four holes of 0.9mm diameter in crosswise at the distance of 1mm from the nozzle tip, the maximum charge cloud current was obtained.
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  • Effects of Transport Condition on the Quality of Ficus Benjamina in Summer
    Takayoshi AKINAGA, Yoshihiro KOHDA
    1990 Volume 52 Issue 6 Pages 67-72
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_67
    JOURNAL FREE ACCESS
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    Subtropical potted plants grown in Okinawa such as Hongkong kapocks, Doracaenas and Ficus Benjaminas have maninly been transported at a normal temperature with van truck to mainland Japan.
    However, normal temperature shipments of potted plant in summer invite deterioration due to high ambient temperature.
    Refrigerated transportation of potted plants was tried to maintain their quality, and its effect was proved.
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  • Studies on Flow Characteristics of Grains (Part 2)
    Application of Microstructural Theory
    Eiichiro SAKAGUCHI, Senkichiro HAYAKAWA
    1990 Volume 52 Issue 6 Pages 73-80
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_73
    JOURNAL FREE ACCESS
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    The purpose of these studies is to clarify the basic flow characteristics of grains by describing quantitatively the flowing state in an inclined open channel.
    In part 1 of these studies, we developed the on-line instrument system by which the velocity distributions at the bottom and the side in the layer of grains flowing in the channel could be measured in one flowing, almost without disturbing the flow, in short time and with high accuracy.
    In this paper, we investigated the possibility of describing the flowing state by microstructural theories on the flow of granular materials. As a result, the density distributions could be estimated by using the velocity distributions and the theory. So it was found that the theory can be applied to the flow.
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  • Abrasive Wear of Tillage Blade (I)
    Effects of Mechanical Factors on Abrasion
    Tooru YAMADA, Seizou GOTOU, Minoru YAMAZAKI
    1990 Volume 52 Issue 6 Pages 81-86
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_81
    JOURNAL FREE ACCESS
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  • Study on the Mixing and Storage Drying Method of Grain (Part 3)
    Application to New Grain Drying Facility
    Zuan JIN, Ritsuya YAMASHITA, Kiyokazu GOTO
    1990 Volume 52 Issue 6 Pages 87-93
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_87
    JOURNAL FREE ACCESS
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  • Psychrometric Chart (45°C, 70°C)
    Satoshi MURATA
    1990 Volume 52 Issue 6 Pages 95-97
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_95
    JOURNAL FREE ACCESS
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  • Neural Network
    Basic Information
    T. FUKUDA, T. SHIBATA
    1990 Volume 52 Issue 6 Pages 99-103
    Published: 1990
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.52.6_99
    JOURNAL FREE ACCESS
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