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Volume 56, Issue 2
Displaying 1-28 of 28 articles from this issue
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J. SAKAI1994 Volume 56 Issue 2 Pages 1-2
Published: 1994
Released on J-STAGE: April 30, 2010
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Perpendicular Adhesion of wheelsJun SAKAI, Jungseob CHOE, Eiji INOUE1994 Volume 56 Issue 2 Pages 3-10
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe purpose of this study is to propose the new dynamics of wheels through the theoretical and experimental studies of the “lift resistance” and “perpendicular adhesion”, to obtain design theories of a wheel lug through the analyses of motion of a lugged wheel and the external forces acting on it, and to analyze the dynamics of a tractor based on the results of the above study. In this paper, the influence of the changes of ground contact pressure and the travel speed of the wheel on the perpendicular adhesion ratio, was studied through the development of a sensor which can measure perpendicular adhesion accurately.View full abstractDownload PDF (1408K) -
Equation of Tractor Dynamics and Method of Parameter MeasurementRyozo NOGUCHI, Eiji INOUE, Osamu KINOSHITA, Jun SAKAI1994 Volume 56 Issue 2 Pages 11-22
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSFrom the point of view of the design and human engineering, the vibration analysis including attached equipment is very important for the optimum design of riding tractor. In this study, the momentum equation and the frequency transfer function of a riding tractor with rotary tiller were constructed by using the Lagrange equation to analyze the vibration characteristics due to the forced vibration from the rotary tiller. Furthermore, each parameter was measured to simulate the vibration characteristics. The spring constant and the viscous damping coefficient of the tractor tire were calculated by the logarithmic decrement of the free vibration wave. The characteristics difference between the tractor tire assembled on the tractor and disassembled was clarified, and the prediction of resonance frequency of tractor became possible.View full abstractDownload PDF (1742K) -
Masanori KITANO, Keiji WATANABE, Kazuya SHINOMURA, Akihiro FUJISHIMA1994 Volume 56 Issue 2 Pages 23-31
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe purpose of this research is to investigate the traveling performance of tracked vehicles on vertical step obstacle. The mathematical model describing obstacle surmounting motion is given in terms of specification of the tracked vehicle and obstacle parameters. Tests were conducted using a scale model on a step obstacle, and the experimental data were compared with the predicted values. It was found that, by the obstacle surmounting motion model considering terraintrack interaction, the surmounting ability for the vertical step obstacle could be accurately assessed. It was also found that the surmounting ability of the tracked vehicle was greatly affected by the geometric shape of the vehicle and the characteristics of the terrain.View full abstractDownload PDF (4017K) -
Thin layer sun drying modelCalleb I. NINDO, Yasunobu KUDO, Eiji BEKKI1994 Volume 56 Issue 2 Pages 33-40
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThin layer sun drying experiments done in highly variable weather provided the needed data for subsequent studies on deep bed radiation drying of raw rough rice. The conditions during outdoor natural drying occasionally led to zero drying rates, making it inappropriate to specify a universally applicable model. The effect of radiation on moisture removal is shown by a direct and increasing relationship between incident radiation and vapour pressure difference. Using the least squares method, a drying constant of 0.384 per hour was obtained by plotting the drying rate against moisture difference (M-Me). In almost all the tests done, rough rice surface temperatures were always higher than ambient temperatures, except during overcast sky conditions when the reverse was true.View full abstractDownload PDF (5062K) -
Effects of Grain and Milling Condition on the whole-Meal Granularity and MoistureMotoyasu NATSUGA, Shuso KAWAMURA, Kazuhiko ITOH1994 Volume 56 Issue 2 Pages 41-48
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe effects of milling condition on the whole-meal granularity and moisture was investigated, using three types of milling machine and three varieties of wheat and one brown rice. The whole-meal granularity and moisture were affected significantly by the kind and variety of grain, milling machine and milling temperature. The estimation of whole-grain moisture from whole-meal moisture had poor accuracy.View full abstractDownload PDF (1145K) -
Firmness Evaluation Device by Deformation “HIT-COUNTER”Sadao OHMORI, Hironoshin TAKAO1994 Volume 56 Issue 2 Pages 49-57
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo evaluate the firmness of fruits and vegetables without destruction, deformed quantity by compressive force was measured within the elastic range. A basic testing equipment (HIT-COUNTER I) was made and tried on kiwifruits to evaluate their firmness. A high correlation to the conventional destructive fruit tester was found, and the possibility of firmness evaluation without destruction was proven. Based on the results, a single equipment for practical use (HIT-COUNTER II) was made, and tested in several laboratories. It was confirmed that the firmness evaluation without destruction was possible in several kinds of fruits. The developed equipment has been produced on a commercial basis, and is beginning to be used in some testing laboratories.View full abstractDownload PDF (4314K) -
Satoshi MURATA, Fumihiko TANAKA, Takahisa MATSUOKA, Kazuhiro HABARA1994 Volume 56 Issue 2 Pages 59-66
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSFreezing point depression of some food solutions were measured at various concentrations in order to reveal the characteristics of solid-liquid phase equilibrium. The measurements were carried out with a hand made apparatus that was calibrated before the measurement by some reagents (acid and sugar) with known thermal properties. The results revealed that the freezing point depression of the food solutions deviated from the behavior of the ideal solution with increasing solute concentration. Therefore, the water activity for non-ideal solution was introduced to the freezing point depression equation, which showed very good conformity. Furthermore, by using the parameters a formula of freezing ratio and the relative water activities were derived, which showed deviation from the ideal solution.View full abstractDownload PDF (1266K) -
Heat Production Rate and Oxygen Uptake RateKazunori IWABUCHI, Toshinori KIMURA1994 Volume 56 Issue 2 Pages 67-74
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDairy cattle feces was degraded aerobically (composted) in the insulated compact reactor with a 1000cm3 capacity. The temperature of the material and the ventilating air, and the oxygen density were measured during the experiment to calculate the heat production and oxygen uptake rate for dairy cattle feces. The results show that an appropriate indicator of biological activity in an early stage of aerobic biodegradation process is not the rate of temperature change of dairy cattle feces, but the rate of heat production or the rate of oxygen uptake of dairy cattle feces. In particular, the rate of temperature change is greatly influenced by the heat capacity of the dairy cattle feces.View full abstractDownload PDF (1305K) -
Measurement Accuracy and Vehicle Recognition Method for OutdoorKatsuyuki OTA, Hideo TERAO, Tomohiko IRIMAJIRI, Mamoru KUBOTA1994 Volume 56 Issue 2 Pages 75-82
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the previous part, the performance of a trial made sensor module was examined on angular measurement. The performance of two sensor modules on position measurement that had been improved for the purpose of decreasing vibration during rotation is reported in this paper. The result showed that under indoor conditions of area 20×14m2, the measurement error was less than 10cm. The vehicle recognition method in this system was largely affected by environmental lightness. Therefore, the image of a marker set outdoors was analyzed with regards to color characteristics, and an improved method of vehicle recognition using the results of color analysis and the probability density function were adopted. The result showed that during this process, very few misrecognitions occured.View full abstractDownload PDF (3783K) -
Optimal Schedule of Working Route by Use of Genetic AlgorithmsNoboru NOGUCHI, Kazunobu ISHII, Hideo TERAO1994 Volume 56 Issue 2 Pages 83-92
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to utilize the agricultural vehicle as an autonomous one, it is necessary to schedule the working route in advance. The vehicle simulator was constructed for both forward and backward movements by neural networks. And genetic algorithms were adopted as an optimization method of a vehicle kinematic. By use of these simulators and genetic algorithms, the time series of the steering angles, that are the control input, were optimized and consequently the working routes of the vehicle were scheduled optimally. As this method divides the route between the initial and terminal conditions into some segments under some constraints and finds the optimal route for each segment, it is possible to create the optimal working route for the complicated conditions including both forward and backward movements.View full abstractDownload PDF (1692K) -
Measurement of Physical Properties for Robotization and Manufacture of Berry Thinning HandMitsuji MONTA, Naoshi KONDO, Yasunori SHIBANO, Kentaro MOHRI1994 Volume 56 Issue 2 Pages 93-100
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSPart 1 and 2 of this series reported on a manipulator, a harvesting hand, and a visual sensor of robot in vineyard. In this paper, an automatization of berry thinning operation was investigated in order to develop a grape production system with robot. The physical properties of grape were measured in the first place. Secondly, a berry thinning hand was made as a trial. This hand consisted of three parts; upper part removed berries, middle part penetrated and shed berries, and lower part cut a bunch to unify its length. Berry thinning experiment was done by using this hand, and the feasibility of the robotization of berry thinning operation was confirmed.View full abstractDownload PDF (3159K) -
Application to Vegetable Transplanting and HarvestingMakoto DOHI, Tateshi FUJIURA, Seiji NAKAO, Toshio IWAO, Koichi TAKEYAM ...1994 Volume 56 Issue 2 Pages 101-108
Published: 1994
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this research was to develop a multi-purpose intelligent robot for the vegetable production. In the previous report, outline of the robot and its application to the weed control in the hill space were reported. This report introduces the application to the vegetable transplanting and harvesting. Two types of planting finger and two types of harvesting hand were experimented. As the result of this research, it was clarified that the cabbage and spinach seedling could be transplanted by the trial made hand crossed finger type. Potherbs were harvested by a trial-made hand that has reciprocating knife. The existence of seedling and the height from the hill space could be detected by optical fiber sensor.View full abstractDownload PDF (1367K) -
Thinning in Seedling ProductionOsamu SAKAUE1994 Volume 56 Issue 2 Pages 109-117
Published: 1994
Released on J-STAGE: April 30, 2010
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Shattering Habit of Various Paddy VarietiesTomohiko ICHIKAWA, Takao SUGIYAMA, Hiroyuki TAKAHASHI, Sumihiko MIYAHA ...1994 Volume 56 Issue 2 Pages 119-125
Published: 1994
Released on J-STAGE: April 30, 2010
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Development of Height Controller and Field Test of HarvesterMikio KANAMITSU, Kenji YAMAMOTO, Yasunori SHIBANO, Kazuya KANEKO, Kimi ...1994 Volume 56 Issue 2 Pages 127-133
Published: 1994
Released on J-STAGE: April 30, 2010
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Kazunori IWABUCHI, Toshinori KIMURA, Jun-ichi KAMIDE1994 Volume 56 Issue 2 Pages 135-138
Published: 1994
Released on J-STAGE: April 30, 2010
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Hitoshi MIKAMI1994 Volume 56 Issue 2 Pages 139-142
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 144-146
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 147-151
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 152-156
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 156-160
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 160-163
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 163-166
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 167-172
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 172-177
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 177-181
Published: 1994
Released on J-STAGE: April 30, 2010
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[in Japanese]1994 Volume 56 Issue 2 Pages 181-184
Published: 1994
Released on J-STAGE: April 30, 2010
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