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Volume 66, Issue 2
Displaying 1-19 of 19 articles from this issue
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K. IMANISHI2004 Volume 66 Issue 2 Pages 1-2
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
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Yoichi SEKIGUCHI2004 Volume 66 Issue 2 Pages 4-7
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
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Mitsuhiro HORIO2004 Volume 66 Issue 2 Pages 8-12
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
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Hiroshi MINETOMO2004 Volume 66 Issue 2 Pages 13-16
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
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Akira SATO2004 Volume 66 Issue 2 Pages 17-20
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
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H. YAMADA2004 Volume 66 Issue 2 Pages 21-23
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
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Y. HIDAKA2004 Volume 66 Issue 2 Pages 24-25
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
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Shigeyuki TAKAHARA, Kazushi SOGO, Koji YAMAURA2004 Volume 66 Issue 2 Pages 45-54
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper presents a control method so that an agricultural vehicle for paddy field weeding runs adaptively in its environment. We have realized that the vehicle autonomously tracks a row of rice and turns at a headland in paddy field by image feedback control. In order to extract the rice plant and to recognize the headland, without the influence of the weather, floating matters in the paddy field and growth of the rice plant, we use a color ingredient extraction method using RGB values of a color image. Moreover, a tracking line is detected by Hough transform to the extracted image. A gyro and an encoder enable the vehicle to turn the headland.View full abstractDownload PDF (10996K) -
Noriko KOMINE, Kiwamu SHIIBA, Ken KANZAKI, Satoshi MATSUMOTO2004 Volume 66 Issue 2 Pages 55-60
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWater-soluble carbon and nitrogen content from animal-waste compost samples were measured as main indicator of compost quality. All of the obtained values were statistically treated and recalculated by the computer equipment using the soft wear of the multivariate analysis. The analytical results proposed the compost quality index (CQI) that was consist of both factors, amounts of microorganism available carbon and nitrogen. It suggested that the CQI of cattle waste compost was generally higher, and one of poultry was lower than swine as average.View full abstractDownload PDF (919K) -
Eiji INOUE, Ichiro MARUTANI, Muneshi MITSUOKA, Yasumaru HIRAI, Masami ...2004 Volume 66 Issue 2 Pages 61-67
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSCrank mechanism has been mainly adopted in the driving mechanism of Combine's cutting section which is arising the main vibration. The balance weight is usually used for reducing unbalanced force of Combine's cutting section from the viewpoint of simple structure and low cost. However, the calculating method of optimum balance weight has not been proposed yet. The purpose of this study is to propose the principle for the design theory about reduction of the vibration of Combine's cutting section through the comparison between the proposed mechanical model on the driving mechanism of cutting section and experimental results of vibration in real cutting section. From the result of experiment, it was indicated that the characteristic of vibration of real cutting section was collision vibration (nonlinear vibration) that was different from the model we proposed, so we analyzed the unbalanced force of cutting section by chaos time series analysis.View full abstractDownload PDF (4847K) -
Discrimination of Stock Seedling by Image ProcessingWonhwan CHOI, Makoto DOHI, Noriaki ISHIZUKA2004 Volume 66 Issue 2 Pages 68-75
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the process of producing flower and vegetable seedlings, defective ones are produced by being germinally inhibited, or being effected by inappropriate environment, moreover, some sort of diseases and insect damages. In order to improve the seedling production, a precision production robot, which removes defective seedlings and transplants good ones into cell pots, is necessary. For this robot, we accumulated picture property of seedlings by image processing. In this paper, we focused on the discrimination method of stock seedlings, which is thought to be most difficult so that skilled workers are necessary. The robot could be applied to most flower and vegetable seedlings if this discrimination of stock seedlings is possible. Then, we firstly made the algorithm of discrimination between double and single flowering forms in the seedling stage, which is based on picture property by image processing. In the result, the accuracy of eight folds seedling discrimination using properties (area, complexity degree and color of cotyledon etc.) was about 89%.View full abstractDownload PDF (6482K) -
Transplanting Robot for Young Seedling Using Urethane-cube Nursery SystemWonhwan CHOI, Makoto DOHI, Noriaki ISHIZUKA2004 Volume 66 Issue 2 Pages 76-84
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to manufacture a trial transplantation robot, young seedling grown in cell-tray were examined on its physical properties and its shape. The results showed that the transplantation was difficult in case of using the existing soil in seedling culture. Therefore, a transplantation robot to transplant the seedlings discriminated by image processing program and algorithm, which was reported in part 1, from cell-tray to seedling pot was developed using urethane-cube as seedling culture materials. It was constructed by a 3 orthogonal linear axes manipulator where an end-effector was fixed on the end of height direction axle. The end-effector was composed of a tweezers type holding section and hole-covering section. The result of transplantation examination showed 91% of transplantation success.View full abstractDownload PDF (5336K) -
Chanseok RYU, Masahiko SUGURI, Mikio UMEDA, Tatsuya INAMURA2004 Volume 66 Issue 2 Pages 85-96
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this research, the possibility of wide area remote sensing technology for precision agriculture in rice paddy was investigated. The sub field was applied three different doses at basal dressing and topdressing. Vegetation indices, calculated from the data of sub field, were compared with the amount of nitrogen content by chemical analysis. At panicle initiation stage and heading stage of sub field, the amount of nitrogen content by chemical analysis was compared with the multiplication of vegetation index and LAI or dry weight and the multiplication of vegetation index and vegetation index instead of LAI or dry weight. Same method was investigated at panicle initiation stage of main field. The multiplication of vegetation indices was investigated of the possibility of estimation of nitrogen content, comparing with SPAD value, vegetation growth index, LAI and the amount of nitrogen content by chemical analysis. It is possible to estimate the nitrogen content of panicle initiation and heading stage at sub field with the multiplication of vegetation indices. It is, however, difficult to estimate the nitrogen content of main field using the multiplication of vegetation indices at main field.View full abstractDownload PDF (6903K) -
Movement and Shape Detection Targeting at agricultural vehicleMichio KISE, Noboru NOGUCHI, Kazunobu ISHII, Hideo TERAO2004 Volume 66 Issue 2 Pages 97-104
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDetecting obstacles invading the region in front of a tractor, and creating an obstacle avoidance behavior are needed as a safety device for an autonomous tractor. This paper presents an obstacle detection system based on a laser scanner. The algorithm utilized a template matching for reconstructing a shape of a target obstacle and for detecting its movement. An extended Kalman filter worked for enhancing an obstacle detection accuracy. Field tests were conducted to evaluate the developed system. The results indicated that the system was capable of estimate a position, a speed, and a heading angle of an obstacle with 2.7cm, 0.13m/s, 1.4° error, respectively.View full abstractDownload PDF (3527K) -
A Prototype of Scion Cutting Device for Cleft GraftingShinya MORIKAWA, Yoshifumi NISHIURA, Tateshi FUJIURA, Yuji TAKAURA2004 Volume 66 Issue 2 Pages 105-112
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this report, a prototype of scion cutting device was developed for saving the cleft grafting work in eggplant cultivation. It cut the hypocotyl into a wedge-shape. Fixing angle of cutting blades, diameter and hardness of the hypocotyl influenced the wedge angle of the hypocotyl. Also the wedge angle depended on the cutting position. The device could cut and shape the hypocotyl into a discretionary wedge angle by adjusting the cutting position. The cutting accuracy was equal or higher than that of the manual operation. Time required per one seedling was about 7 seconds, that was about 40% of the manual operation. It became clear that the developed device was practical.View full abstractDownload PDF (3812K) -
Development of a Robotic System for Grading Sweet PeppersJun QIAO, Akira SASAO, Sakae SHIBUSAWA, Naoshi KONDO, Eiji MORIMOTO2004 Volume 66 Issue 2 Pages 113-122
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this study, a mobile fruit grading robot for information-added product in precision agriculture was developed. The prototype robot, which consisted of a manipulator, an end-effector, a machine vision system, and a mobile mechanism, was made. The robot could acquire five fruit images from four sides and the top while its manipulator transported the fruit received from the operator. A preliminary experiment was conducted with 121 samples of colored sweet pepper in 8 varieties, while the samples were divided into four sub-groups by its properties. A fruit mass prediction method was developed by use of the five images. Results indicated that the fruit mass was successfully estimated with projection areas for the respective sub-groups.View full abstractDownload PDF (8676K) -
Metering Device Power Requirement and TorqueMo'taz KHILAEL, Michihisa IIDA, Mikio UMEDA2004 Volume 66 Issue 2 Pages 123-129
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this research was to reduce the power requirement and torque of a metering device for a variable rate granular fertilizer applicator under development. To that end, two prototypes for the metering device roller feeder were made and tested: a flexible rubber type and an edge-cell type. On the basis of metering two types of chemical fertilizer, the power requirement and torque of both types of metering devices were measured and compared. Results showed that both metering devices could precisely meter the applied amount of fertilizer by controlling roller rotational speed. The edge-cell roller feeder offers the advantage because it can control to meter the amount of fertilizer with a lower power requirement than that of the rubber roller feeder.View full abstractDownload PDF (7200K) -
Takashi KATAOKA, Hiroshi OKAMOTO, Masaki TERAWAKI, Shun-ich HATA2004 Volume 66 Issue 2 Pages 130-136
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe tillage characteristics of the short scoop surface blade (short blade) have been measured and analyzed. The tillage resistance of the short blade was measured under field conditions and compared with the normal scoop surface blades (standard blade). The maximum tillage speed which was caused by falling of the tractor engine revolution with the overloads was 0.25m/s using the standard blade and 0.4m/s for the short blade. The torque requirement of the rotary shaft using the short blades was 10% lower compared to standard blades. Furthermore, it was found that the level of torque variance of the rotary shaft using the short blade was also smaller compared to standard blade. The quality of tillage was almost the same with both types of blades. In summary, it was concluded that short blades have an advantage against standard blades for the deep rotary tillage operation.View full abstractDownload PDF (7684K) -
Systemization of Data Acquisition, Analysis and MappingTadashi CHOSA, Yoichi SHIBATA, Masaaki OMINE, Kazunobu TORIYAMA, Kan A ...2004 Volume 66 Issue 2 Pages 137-144
Published: March 01, 2004
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA yield-monitoring system for head-feeding combines was developed and its usefulness was shown. The system monitors the yield using an optical sensor and a load cell, while simultaneously recording position information during harvesting using GPS. The system draws a yield map after analyzing the tailings return and operation width.
Using a head-feeding combine equipped with our system, it was possible to obtain yield information during normal fieldwork. The resulting yield map was equivalent to one obtained using quadrate sampling. The yield-monitoring error of our system was about 10%.View full abstractDownload PDF (5088K)
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