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Volume 69 (2007)
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Volume 69, Issue 4
Displaying 1-17 of 17 articles from this issue
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T. TAKIGAWA2007 Volume 69 Issue 4 Pages 1-2
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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H. FUJIMURA2007 Volume 69 Issue 4 Pages 4-7
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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A. OHSHIMA2007 Volume 69 Issue 4 Pages 7-11
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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T. YAMAMOTO2007 Volume 69 Issue 4 Pages 12-15
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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T. SUKIGARA2007 Volume 69 Issue 4 Pages 16-21
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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E. IMAMURA2007 Volume 69 Issue 4 Pages 22-25
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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Y. MIYATAKE2007 Volume 69 Issue 4 Pages 26-30
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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K. SANPEI2007 Volume 69 Issue 4 Pages 31-33
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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M. MATSUZAWA2007 Volume 69 Issue 4 Pages 34-37
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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Y. SUGIURA2007 Volume 69 Issue 4 Pages 38-39
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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A. HIRATA, H. GOTOH2007 Volume 69 Issue 4 Pages 40-41
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
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Joko Nugroho Wahyu KARYADI, Michio HARANO, Naoto SHIMIZU, Tomohiro TAK ...2007 Volume 69 Issue 4 Pages 71-78
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
JOURNAL FREE ACCESSA mixture of cattle manure and sawdust was composted using an 18.8 L reactor at aeration rates of 0.05, 0.15, and 0.50L/min.kgdm, employing three turning patterns (no turning, full turning, and turning with position change of the layers). The maximum temperatures for aeration were 64.3°C at 0.05L/min.kgdm, 73.2°C at 0.15L/min.kgdm, and 70.8°C at 0.50L/min.kgdm. An aeration rate of 0.50L/min.kgdm effectively accelerates composting in the early stage. A combination of aeration and the turning operation were found to resulting in different composting process patterns. Organic matter reduction in forced aeration composting can be enhanced with turning and its reduction in composting with full turning was somewhat greater than that for turning with a position change. We propose major composition changes in compost material by aeration and turning in a fabricated packed-bed reactor.View full abstractDownload PDF (1225K) -
Basic Design of the Yield Monitoring System and Continuous Measurement of Yield and MoistureEiji MAKINO, Takao SUGIYAMA, Tomohiko ICHIKAWA, Kenji Hamada, Michio K ...2007 Volume 69 Issue 4 Pages 79-88
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
JOURNAL FREE ACCESSWe developed a combine harvester capable of measuring, displaying and recording yield and moisture while harvesting. These measurements can then be used to prepare a yield map after harvesting. The prototype combine harvester is a head-feeding type and consists of components for measuring the mass, moisture, and location of the grain being harvested, as well as a control and display device. The mass-measurement device measures grain mass in the tank using a load cell and an inclination sensor. The moisture-measurement device is an electrical-resistance moisture meter that can measure the moisture content of two or more grains simultaneously.View full abstractDownload PDF (5602K) -
Kimiyasu TAKAHASHI, Hirokatsu SHITO, Yukinori SHIBUYA, Nobuki YAMANA2007 Volume 69 Issue 4 Pages 89-95
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
JOURNAL FREE ACCESSThe authors are developing a self-propelled harvester that enables harvesting, cutting, and rolling mold corn, grass, and feed rice plant with one machine. This will facilitate expanding the feed production base into untilled paddy fields, thus reducing the production cost. Wilting grass has a greater resistance to cutting than other crops, as well as uneven moisture and grass volume. It thus jams easily during harvesting and cutting, reducing the processing volume per hour.
Therefore, the cylinder type cutterhead of the harvesting section was improved to reduce the resistance to cutting and the blowing capacity, thereby reducing power consumption and stabilizing rotation. The obtained performance was then compared to that before improvement. Reduced power consumption could not be confirmed, but it appeared that adopting an increased inertia moment for the cutterhead will improve the stability of work, leading to improved work performance.View full abstractDownload PDF (3582K) -
Analysis of the Generation Factors of Header LossNaonobu UMEDA, Yutaka KANETANI, Yoshisada NAGASAKA, Eiji INOUE2007 Volume 69 Issue 4 Pages 96-101
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
JOURNAL FREE ACCESSWe observed the influence of the components of the header on soybean plants during harvesting by employing a high-speed video camera. The stalks fell forward when the reel did not gather them, resulting in shattered pods. We next constructed a harvesting simulator based on data on analysis of reel displacement, intra-row spacing, and the height of the soybean plants. The results showed the ratio of the stalks gathered to be below 42% and the ratio of the stalks pushed forward to be below 18% under normal combine operation, suggesting that it is important to clarify the optimum use conditions of reel and to degree the forward speed of stalks, since when the reel does not gather the stalks, the overall gathering rate of stalks is low, causing high harvesting losses.View full abstractDownload PDF (2898K) -
Geometrical Analyzing Generation Factors of Header LossesNaonobu UMEDA, Eiji INOUE, Yutaka KANETANI, Yoshisada NAGASAKA2007 Volume 69 Issue 4 Pages 102-108
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
JOURNAL FREE ACCESSThe gathering process was classified into the moving process, the displacing process and the cutting process for each action of the knife. The forward motion of the stalks was analyzed geometrically in each process into the parameters of advance ratio, cutting height, guard pitch and other working conditions, We defined the “ineffective cutting area” as the area where the knife section did not cut effectively during the moving process, the “stalk motion angle during the displacement process” as the direction of the forward lean of the stalk, the “lodging angular velocity” as the angular velocity during the displacement process of the stalk while still rooted, and the “terminal cutting angle” as the cutting angle at the point where the knife closed with the guard. The results showed that to optimize each process, the advance rate should be low, the cutting height should be high and the knife angle should be small. However, the best advance ratio and guard pitch varied with each process, suggesting that it is necessary to clarify under what conditions the forward speed of the stalk during the gathering process can be minimized.View full abstractDownload PDF (975K) -
Analysis of Forward Motion of Stalks by Examination of Stalk CuttingNaonobu UMEDA, Eiji INOUE, Yutaka KANETANI, Yoshisada NAGASAKA2007 Volume 69 Issue 4 Pages 109-114
Published: July 01, 2007
Released on J-STAGE: November 17, 2011
JOURNAL FREE ACCESSWe set up a model experiment for cutting stalks with a combine to investigate the forward motion of the stalk during the gathering process. The speed of movement of the stalk's center of gravity was provisionally termed the center of gravity speed. When the stalk was assumed to be a rigid body, the calculated center of gravity speed tended to be higher than the value actually measured with a side-mounted video camera. We then assumed that all motion energies were converted into potential energies of the deflection of the stalk, and corrected the center of gravity speed. The calculated center of gravity speed then agreed closely with the measured value. After calculating the center of gravity speed using our design parameters, it was shown that a narrower guard pitch led to a lower center of gravity speed. Next, after examining the relationship between the slip of the stalk on the blade edge and the center of gravity speed during the cutting process, we found that a longer slip of the stalk tended to result in a higher center of gravity speed. The slip tended to shorten as the cutting angle approached 0°, suggesting that a normal blade should be fitted at an advance ratio of 1.03 and a slim blade fitted at an advance ratio of 1.91. It was thus shown to be important in cutter-bar design for the guard pitch to be narrower and that the combination of knife angle and the advance ratio be selected to bring the terminal cutting angle close to 0°.View full abstractDownload PDF (2827K)
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