JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY
Online ISSN : 1884-6025
Print ISSN : 0285-2543
ISSN-L : 0285-2543
Search
Advanced search
OR
Browse
Search
Volume 54, Issue 6
Displaying 1-21 of 21 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    T. TAKEDA
    1992 Volume 54 Issue 6 Pages 1-2
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_1
    JOURNAL FREE ACCESS
    Download PDF (2215K)
  • On the Equivalent Mass of Tractor-Implement System (Part 1)
    Measurement on Equivalent Mass of Four Wheeled Tractor-Implement System
    Jun SAKAI, Junichi TAKEDA, Ryo TORISU
    1992 Volume 54 Issue 6 Pages 3-11
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_3
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This paper describes equivalent mass, which is used for predicting dynamic characteristics like transient responses of the system, of a four wheeled tractor-implement system. The values of equivalent mass depend on gear ratio are expressed as a coefficient divided by the total mass. The tractor-implement system was disassembled and the moment of inertia of each rotating components, which form the drive train from the clutch to the output shaft, were measured to calculate equivalent mass by the trifilar pendulum system.
    From the results, the coefficient of equivalent mass on the tractor itself is 5.77 and 0.15 for 1st and 8th gear respectively. The coefficient is rather bigger than that of an automobile.
    The coefficient becomes bigger when the system has a rotary tiller which includes parts with high moment of inertia such as the rotary shaft.
    View full abstract
    Download PDF (1422K)
  • Measurements of the Properties of Granular Material by Tine-Sensor
    Mesurements of Surface Profile and Bulk Density
    Kiyoshi TAJIMA, Koji TAMAKI, Tadashi KOBAYASHI
    1992 Volume 54 Issue 6 Pages 13-19
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_13
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Possibility of knowing some properties, such as surface profile and bulk density of sand, by measuring the horizontal components of resistance and acting point on the vertical tine traveling through sand was examined. Cylindrical soilbin with rotative mechanism was used to reduce efforts for refilling the sand in the soilbin and assure uniformness of this sand.
    In the experiments under the sand condition refilled by this soilbin, the horizontal components of resistance working on the tine under constant depth had similar frequency distribution, showing uniform sand condition obtained by rotating the soilbin. It will be possible to predict the surface profile of sand and the change of bulk density in sand by these measurements.
    View full abstract
    Download PDF (1048K)
  • Studies on Minimum Tillage Tools (Part 1)
    Soil Bin Studies on Tine Implements
    Shun-nan SHEN, Osamu KITANI, Tsuguo OKAMOTO, Tooru TORII, Satoshi YONE ...
    1992 Volume 54 Issue 6 Pages 21-29
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_21
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The objective of this study was to examine the characteristics of narrow tines for minimum tillage, and to examine the methods using artificial intelligence for the selection of reduced tillage system and tillage tools suitable to the different soil texture, climate and crop conditions.
    In order to examine the characteristics of rigid-tines and spring-tines, soil bin experiments were conducted in this report. Shearing processes in soil caused by rigid-tines and spring-tines were observed and the relationship between resistance and tine displacement was measured. Furthermore, experimental study of tines was conducted to examine the dynamic charactristic of soil failure and resistance of rigid-tines and spring-tines. Relationships were examined among the peak force, through force, average force, cycle, area of soil failure, working depth/width ratio, rake angle of tine, working speed and elasticity of tine.
    View full abstract
    Download PDF (4232K)
  • Studies on the Improvement of the Straw Cutter Attached to a Head-Feeding Combine (Part 2)
    Improvement of Straw Splitting Device
    Kouhei TASAKA, Youichi SHIBATA, Kensuke AMANO
    1992 Volume 54 Issue 6 Pages 31-40
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_31
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    To improve the straw splitting device which was attached to the head feeding combine, the shape of straw splitting cutter and the structure, performance and load characteristics of new straw splitting devices were examined.
    The new splitting device consists of revolving shafts made of steel pipes with a diameter of 50mm and roll-type straw splitting cutters in which the vertical ditches of one cutter face the projections of another.
    Submerging, for over three days and puddling under low water level reduced the floating rate of straw to about 1%.
    The power requirement of the straw splitting device (4th model) is three or six times as that of conventional disk-type straw cutter on the market, but it was confirmed that the power requirement can be reduced by raising revolution speed.
    View full abstract
    Download PDF (8519K)
  • Model Test on Rice Threshing
    Mikio UMEDA
    1992 Volume 54 Issue 6 Pages 41-49
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_41
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This study presents a proof of previously reported threshing mechanism theory for Japanese type head feeding combine, and the possibility of ear-breaking control and sensing in experiments were confirmed using two kinds of model threshers.
    For this purpose, ear-head motion is observed in strobe-picture, and threshing tooth strain is measured using strain gage.
    Though the condition is restricted to one stem of rice without leaves, the threshing theory is proved by the observation and the analysis of threshing energy. It is possible to control ear-breaking by means of changing posture between threshing tooth and head. Also, if we use strain gage, the sensing of ear-breaking is capable.
    Furthermore, the model thresher under the threshing condition based on the threshing theory has the same performance as current Japanese type head-feeding thresher.
    View full abstract
    Download PDF (9395K)
  • Drying of Buckwheat and Estimation of its Quality (Part 1)
    Drying Characteristics of Buckwheat on Thin Layer
    Shoji TAHARAZAKO, Kazuo MORITA, WEI
    1992 Volume 54 Issue 6 Pages 51-56
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_51
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The drying characteristics of buckwheat which contained high moisture in the initial stage were investigated at various drying air temperature (10-50°C) and experimental data were analyzed using an exponential model on the presumption that the drying process can be treated as heat-and-mass transfer on the thin layer. The drying rate was distingished between first and second falling drying rate period. The relationships between drying rate and moisture content, and between moisture ratio and drying time were investigated. The drying constants for various drying temperature were calculated by two different methods and the difference of resultant values in the drying constant were discussed. Finally, the drying constant was expressed as a function of drying temperature in an empirical formula.
    View full abstract
    Download PDF (888K)
  • Studies on Drum-type Fluidized Dryer for Grain (Part 1)
    Jinzo NAGAHIRO, Ken HIGUCHI, Yasushi WATANABE
    1992 Volume 54 Issue 6 Pages 57-64
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_57
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The drying method of a current grain dryer such as a circulation-type dryer has essential defects as an increase of damaged grain and the taste reduction, since the drying air of the dryer is too hot. In order to remove these difficulties in the dryer, a drum-type fluidized dryer has been proposed here. The experimental study, by using the prototype of the proposed dryer, on drying rough rice showed (1) high drying rate, (2) low probability of damaged or cracked grain, as well as uniform moisture content, and (3) improved taste in comparison with the current dryer.
    View full abstract
    Download PDF (1229K)
  • Dynamical Analysis of Impeller-type Rice Husker (Part 2)
    Comparison between Dehulling Experiments and the Theory
    Yoshio NISHIYAMA, Yutaka KIKUCHI, Takuma SHISAI
    1992 Volume 54 Issue 6 Pages 65-71
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_65
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Energy consumption, husking ratio, crack ratio and broken rice ratio with respect to various rotational speed (N) of the dehulling fan (700-3000rpm) were measured from dehulling experiments of the commercial rice husker with a standard impeller blade and a new type of blade. The new type of blade was so designed as to get less bouncing of paddy grain at the surface of the blade considering normal force distribution.
    Energy consumption was proportional to N2, which is agreed with the law of proportion in terms of rotating angular velocity proposed by the first author in the former report (part I).
    Husking ratio was expressed by the Weibull distribution function with respect to energy consumption. Crack ratio and broken rice ratio for the newly designed blade, were lower than those for the standard blade.
    View full abstract
    Download PDF (1035K)
  • Measurement and Control of Water Status of a Plant (Part 1)
    Identification of Non-parametric Models
    Toru TORII, Tuguo OKAMOTO, Osamu KITANI, Takayuki OCHIAI
    1992 Volume 54 Issue 6 Pages 73-79
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_73
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Control of water stress to the plant is one of the important technologies for greenhouse and field cultivation. The quality of the crops might be improved by optimizing control of water stress. In this study, the plant's responses to the randomly varying two levels of light intensity were measured, and the frequency characteristics of the plant were calculated. Cross correlation functions with varied light intensity and transpiration, diameter, and leaf temperature were calculated. The result showed time lag of these functions were about 4min., 8min., and 1min. respectively. The step response of the lighting to the plant was also measured, and the frequency characteristics under random lighting condition and from step response showed good agreement.
    View full abstract
    Download PDF (1085K)
  • Effect of the Alternating Electric Field of Distorted wave on Plant Growth
    Exposure of Culture Plantlet to the Field
    Masaki MATSUO, Toshitaka UCHINO, Mariko OHMURA
    1992 Volume 54 Issue 6 Pages 81-88
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_81
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    For the purpose of studying the effect of electric field on plant growth, apple mints were cultured for twenty days, exposing to the alternating field of distorted wave at 0.5kV.
    Under the continuous exposure through light and dark period, the growth ratio of the plantlet fresh weight to the control was maximum, and fresh weight and length of root increased remarkably after 9 days. Under the light period exposure, the ratio was maximum and root grew notably after 19 days. Under the dark period exposure, the ratio after 14 days was maximum and the root dry weight increased significantly.
    The ratio generally increased due to the water absorption, as the ratio of dry weight was smaller than that of fresh weight.
    View full abstract
    Download PDF (1302K)
  • Precision and Accuracy of Near-Infrared Reflectance Spectroscopy in Determining Constituent Content of Grain (Part 2)
    Moisture, Protein, Fat Acidity of Brown Rice and Milled Rice
    Motoyasu NATSUGA, Shuso KAWAMURA, Kazuhiko ITOH
    1992 Volume 54 Issue 6 Pages 89-94
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_89
    JOURNAL FREE ACCESS
    Download PDF (743K)
  • Effect of the Water Exposed to Corona Discharge on the Plantlet Growth
    The Use to Water of Culture Medium
    Masaki MATSUO, Toshitaka UCHINO
    1992 Volume 54 Issue 6 Pages 95-99
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_95
    JOURNAL FREE ACCESS
    Download PDF (795K)
  • Development of Soil Diagnosis Research for Increasing Environment Conservation Faculty, Commodity Quality and Productivity
    Masashi UWASAWA
    1992 Volume 54 Issue 6 Pages 101-105
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_101
    JOURNAL FREE ACCESS
    Download PDF (4268K)
  • [title in Japanese]
    [in Japanese]
    1992 Volume 54 Issue 6 Pages 108-110
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_108
    JOURNAL FREE ACCESS
    Download PDF (617K)
  • [title in Japanese]
    [in Japanese]
    1992 Volume 54 Issue 6 Pages 111-114
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_111
    JOURNAL FREE ACCESS
    Download PDF (629K)
  • [title in Japanese]
    [in Japanese]
    1992 Volume 54 Issue 6 Pages 115-121
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_115
    JOURNAL FREE ACCESS
    Download PDF (1186K)
  • [title in Japanese]
    [in Japanese]
    1992 Volume 54 Issue 6 Pages 122-129
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_122
    JOURNAL FREE ACCESS
    Download PDF (1401K)
  • [title in Japanese]
    [in Japanese]
    1992 Volume 54 Issue 6 Pages 130-133
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_130
    JOURNAL FREE ACCESS
    Download PDF (696K)
  • [title in Japanese]
    [in Japanese]
    1992 Volume 54 Issue 6 Pages 134-139
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_134
    JOURNAL FREE ACCESS
    Download PDF (5727K)
  • [title in Japanese]
    [in Japanese]
    1992 Volume 54 Issue 6 Pages 140-143
    Published: 1992
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.11357/jsam1937.54.6_140
    JOURNAL FREE ACCESS
    Download PDF (6112K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top