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Volume 59, Issue 5
Displaying 1-20 of 20 articles from this issue
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K. Itoh1997 Volume 59 Issue 5 Pages 1-2
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
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Hyung-gyu JUN, Tetsuji TANIGUCHI, Ko-ichi OHTOMO, Tadashi KISHIMOTO, T ...1997 Volume 59 Issue 5 Pages 3-12
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSMethods for the determination of 3-D contact area between a tire and soil were presented to improve tire performance and to clarify soil compaction. The contact area during tire operation on the soil was calculated with radial, lateral and longitudinal deflections of the tire and the sinkage. The device with a laser sensor was developed to measure the distances from a fixed position to soil surface for the calculation of contact area under static condition. The contact area under static condition was 1.3 times as that under operating condition. The soil deformations in specific soil depth were measured with the device. The effect of tire lug on soil deformation was recognized in the layer shallower than 10cm of initial soil condition.View full abstractDownload PDF (5501K) -
Tillage Resistance and Throwing of Clods by Single-Bladed ModelTakashi KATAOKA, Kazuhiro ONODERA, Sakae SHIBUSAWA, Yoshinobu OTA1997 Volume 59 Issue 5 Pages 13-19
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSRecent breakthroughs in the establishment of a reverse-rotational rotary tiller with Sukuizume require the development of techniques for further reducing the soil cutting resistance while maintaining the function of backward throwing of tilled clods. This article describes the characteristics of cutting resistance and the backward throwing of a single-blade unit using a double-bladed experimental apparatus to cut a soil block. Three different test blades (a normal scoop-surface outer-edge, a short scoop-surface outer-edge and a normal scoop-surface inner-edge) were used. Results showed that the short scoop-surface blade reduced tillage resistance by about 25% and also reduced the distance clods were thrown when compared with the normal scoop-surface blade. The inner-edged blade both produced high cutting resistance and reduced the clod throwing distance.View full abstractDownload PDF (4474K) -
Development of a Leaf FeederNobuyoshi HATTORI, Yoshiaki MAEKAWA, Kineo ASAI, Hiroyuki NAKAJIMA1997 Volume 59 Issue 5 Pages 21-28
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA full automated tying machine was developed for harvested burley tobacco leaves. The purpose of this study was to develop an automatic leaf feeder which saves the labor of tying operation. The physical properties on the automatic feeding of harvest tobacco leaves was measured and the methods of picking-up of a leaf was investigated. The prototype leaf feeders were produced and examined through the performance test. As a result, the method used suction was found to be effective for leaf separation one by one, and suction-holding type leaf feeder was suitable for automatic feeding.View full abstractDownload PDF (1181K) -
Effects of Moisture Content with Dairy Cattle Feces on Oxygen Uptake RateKazunori IWABUCHI, Toshinori KIMURA1997 Volume 59 Issue 5 Pages 29-35
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper describes the dependence of the oxygen uptake rate on substrate moisture content during composting with forced aeration. The experimental substrate in this study consisted of dairy cattle feces without urine. The results demonstrated that the maximum oxygen uptake rate was observed when the moisture content was approximately 55% w. b. (water film thickness of 3.9×10-9m). The calculated oxygen transfer coefficients in the water film around a solid waste particle were found to decrease as the thickness of the water film increased. This is most likely due to the fact that once the moisture content surpasses approximately 55% w. b., the thickness of the water film around a solid waste particle hinders the transfer of oxygen to the microorganisms adhering to the solid waste particle.View full abstractDownload PDF (1124K) -
Another Method of Boundary Line Detection and Position IdentificationToru TORII, Tsuguo OKAMOTO, Akira TAKAMIZAWA, Takahiro KANUMA1997 Volume 59 Issue 5 Pages 37-44
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper describes a method of determining the direction and position of a camera toward a crop row from field images. The images were clearly divided into crop area and other area by setting threshold line in the hue-intensity plane. To clear small noise in the image, 5×5-pixels were averaged and reduced into one block and then filtering was done. To detect the edge of the crop row, a vertical scanning method was used from the center of the image outward to the right and left. Based on the fact that the boundary lines were parallel, a perspective view transformation was calculated. The vanishing point in the image, the position of the camera between the crop rows, and the directional angle of camera to the crop row were obtained. The results showed that the precision was sufficient for the control of a mobile robot for agricultural use.View full abstractDownload PDF (6379K) -
Recognition of Cotyledon and True Leaf on Young Seedling ImageTakao NISHI, Naoshi KONDO, Kentaro MOHRI1997 Volume 59 Issue 5 Pages 45-53
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAn image recognition algorithm of plant was developed to automate management operations for cucumber plant considering plant growth rules. In this paper, a method to recognize cotyledon and true leaves of young cucumber seedling on binary image is reported. As features to discriminate cotyledon and true leaf, a complexity of boundary on a polygonal image and moment around leaf axis were extracted. It was observed that cotyledon and true leaf were identified with the probability higher than 92%. The identification from the whole image of seedling was possible with the probability of 89.8%, by verifying the discrimination results of respective leaves using leaf number and angle between leaves.View full abstractDownload PDF (3217K) -
Analysis of Reaction Force of a Single Model CellMikio UMEDA, Kiyoshi NAMIKAWA, Yoshisada NAGASAKA, Tomotika MOTOMURA, ...1997 Volume 59 Issue 5 Pages 55-62
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSPlant consists of cells. It is difficult to describe the relation between mechanical properties of plant and a cell, because structure of plant is complex. This study is a preparation for the research of mechanical properties of plant based on cell properties. The relation between mechanical properties of aggregate and a single cell was investigated using Kelvin tetrakaidecahedron rubber model cell. In this report, analytical results by Finite Element Method were verified by experimental results using model cell. During small displacement undergoing uniaxial compression, the model cell keeps nearly original shape and the load is supported by rubber cell wall. Thus reaction force is proportional to compressive displacement. The force can be analyzed with FEM analysis.View full abstractDownload PDF (7055K) -
Field Test on Mole PlowP. A. S. RADITE, Kiyoshi NAMIKAWA, Michihisa IIDA1997 Volume 59 Issue 5 Pages 63-72
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSField test on electro-osmotic lubrication on mole plow is reported in this paper. Analysis on ground resistance of the implement is also discussed. Tests were conducted both in an loam upland field and in a sandy loam paddy field. At paddy field, tests were conducted at plowing depths of 30 to 50cm and operating speeds of 1.20 to 3.49km/h. At upland field, tests were conducted at plowing depths of 31 to 34cm and operating speeds of 0.15 to 1.11km/h. Voltage applied between the cathode (disk coulter and expander) and the anode (chisel and shank) was DC 250V. In paddy field test at a depth of 32cm, 5.6 to 13.2% reduction of draft was observed, and the flow of current was 0.89 to 1.20A. In upland field test at a depth of 30cm, -9.2 to 4.5% reduction of draft was observed, and the flow of current was 0.62 to 0.93A.View full abstractDownload PDF (5902K) -
I WAYAN ASTIKA, Akira SASAO, Moeljarno DJOJOMARTONO, Setyo PERTIWI, Ha ...1997 Volume 59 Issue 5 Pages 73-81
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe aim of this research is to minimize the effect of water shortage by arranging better planting-harvesting schedule so that plant growth stages fit water availability given by local climate. This research confirmed that regular schedule used by the selected case study plantation has been suffering from water shortage effect because of inappropriate planting and harvesting time. In order to improve the net sugar production by optimizing the planting schedule, three cases of scheduling were set up. One of them is to maximize the sugar production by using the conventional linear programming, and another one is to maximize the sugar production by using the fuzzy linear programming. The other one is to minimize cultivated area at maximum milling capacity of the factory by using the conventional linear programming. The resulted increase of net sugar productivity by optimized planting schedule was 16-21%.View full abstractDownload PDF (1130K) -
Hideo HOSHIBA, Kazutaka UMETSU, Hidehiko TAKAHATA1997 Volume 59 Issue 5 Pages 83-90
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe tested milker is a variable pulse rate milker which has the capability of selecting the pulse rate depending on the milk flow rate. We compared the constant pulse rate milker and the tested milker to clarify the milking performance. The tested milker effected the milk flow rate in 87% of the tested cows. The average milk flow speed ratio of the tested milker was 8% higher than that of the constant pulse rate milker. The milk flow rate of the tested milker reached its maximum in the first milking stage(0.5-3.5 L). The ratio was 9.9% higher than the average milk flow speed ratio, but the ratio gradually decreased as milking progressed. The tested milker was effective for the cows of slow milking flow rate; the average milk flow speed ratio was 34% higher than the constant pulse rate milker, and consequently, shortened the milking time.View full abstractDownload PDF (4389K) -
Kazutaka UMETSU, Hidehiko TAKAHATA, Hideo HOSHIBA1997 Volume 59 Issue 5 Pages 91-98
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe effects of temperature on rheological properties of livestock waste slurries was examined experimentally. The slurries had temperature ranging from 5 to 42.5°C. Apparent viscosity of the slurries was found to decrease as temperature increased, and increase as total solids increased. The activation energy (Andrade's equation) was determined for Hol-stain dairy cow, heifer, Angus, Kuroge, swine and poultry waste slurries.View full abstractDownload PDF (1114K) -
Shiro HIROOKA, Hideo TERAO, Mamoru KUBOTA1997 Volume 59 Issue 5 Pages 99-105
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to recognize the position of a vehicle using image sensor, it is important to identify a marker on a moving vehicle in the image of the vehicle taken by a CCD camera. The purpose of this study is to develop a vehicle recognition method for various environments using image processing and intelligent system.View full abstractDownload PDF (2672K) -
Present System and ProblemsHiroshi MOMONO1997 Volume 59 Issue 5 Pages 107-112
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
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Measurement of Water Content and its ApplicationsShuichi HASEGAWA1997 Volume 59 Issue 5 Pages 113-116
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
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Measurement of Water Content and its ApplicationsMitsugu YOSHIMURA1997 Volume 59 Issue 5 Pages 116-120
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
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Measurement of Water Content and its ApplicationsHaruhiko MURASE1997 Volume 59 Issue 5 Pages 120-123
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
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Measurement of Water Content and its ApplicationsTohru SHIMOHARA1997 Volume 59 Issue 5 Pages 123-126
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
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K. TSUGA1997 Volume 59 Issue 5 Pages 127-128
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
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T. SUGIYAMA1997 Volume 59 Issue 5 Pages 129-130
Published: September 01, 1997
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1926K)
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