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Volume 57, Issue 1
Displaying 1-9 of 9 articles from this issue
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M. IMAI1995 Volume 57 Issue 1 Pages 1-2
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2051K) -
Effect of Pivot Turn System with Contact Length ControlledNobutaka ITO, Koji KITO, Jie BAI1995 Volume 57 Issue 1 Pages 3-8
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe authors proposed a practical method for improving the turnabillty of tracked vehicle, in which the braked track was pivoted with the control of contact length by concentrating the load on the central part of the track. It was proved that the proposed pivot turn system could reduce the turning motion resistance effectively and drastically, and perform the smooth and less energy consuming turning. However, the additional mechanism will lead to the rising of the machine cost. This paper deals with the evaluation of the proposed pivot turn system, by comparing with the conventional one, from the viewpoint of the work consumed while turning.View full abstractDownload PDF (818K) -
Ikuo YAMAMOTO, Masayuki KOIKE, Jun-ichi SATO, Noriyuki MURAKAMI1995 Volume 57 Issue 1 Pages 9-16
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo clarify the dynamic viscoelastic properties of paddy field soil, the complex modulus and loss coefficient were measured placing small amount of excitation on the soil, and corresponding effects to the bulk density, frequency and moisture content were examined. It was observed that the complex moduli took higher values together with the increase of the bulk density and with the decrease of the moisture content. The loss coefficient tended to increase with the increase of bulk density, but the effect of moisture content to the loss coefficent did not show clear trend. Also, the higher frequency resulted in the higher complex modulus and loss coefficient. The viscoelastic constants of the Voigt model and the Maxwell model were evaluated, and it was found that these constants were affected by the frequency.View full abstractDownload PDF (956K) -
Characteristics of Brown Rice Drying Using Circulating Type DryerJian-wei LIU, Kiyokazu GOTO, Yoshihiro MIWA, Kazunobu TOMITA1995 Volume 57 Issue 1 Pages 17-23
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSSome experiments of brown rice drying were carried out using a circulating type dryer of practical use on the basis of fundamental characteristics mentioned in the previous report. Electric consumption for brown rice drying was reduced to less than half of usual rough rice drying. The higher the initial drying rate was, the more the cracking occurred. However, the amount of cracks was more than that experienced in the fundamental experiment. It is considered that they were caused by impacts and friction during material circulation exclusive of heat stress in the dryer. There was a linear relation between the degree of skin damage and the initial moisture content. From the palatability test, there is no difference in rice taste between brown rice drying and rough rice drying. Therefore, we may conclude that, by making the quality a little better, the usual circulating type dryer is available for brown rice drying. So this innovation can realize the energy saving and cost reduction in the rice postharvest operation.View full abstractDownload PDF (957K) -
Satoshi MURATA, Fumihiko TANAKA, Kazuhiro HABARA1995 Volume 57 Issue 1 Pages 25-32
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn view of the fact that food freezing is caused by freezing of the water solution in the food, a new heat conduction equation including phase equilibrium relationship is introduced. In this equation the modified thermal diffusivity is related to the temperature, and the diffusion equation for unsteady heat conduction shows intense non-linearity. Computation was based on the weighted residual (collocation) method. The calculated results were agreed well with the experimental data. It is expected that this result would be useful for frozen food operations.View full abstractDownload PDF (1019K) -
Quantification of Gloss of Eggplants by Spectral CharacteristicsTakahisa MATSUOKA, Kiyoshi MIYAUCHI, Deming SUN1995 Volume 57 Issue 1 Pages 33-40
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSColor and gloss are important elements in quality evaluation of agricultural products. As compared with data on the color, there is few data on the gloss. The gloss in surface of eggplant was measured by spectral radio-meter system, and the degree of gloss was quantified by integrated relative spectral reflectance in visible range. The changes of gloss with time under some storage conditions were investigated, and it was found that the relative spectral reflectance values for eggplants decreased remarkably after 48 hours of storage regardless of conditions. The decrease of relative spectral reflectance value was observed remarkably in glossy samples.View full abstractDownload PDF (1004K) -
Infuluence of Components of an Aeration Nozzle on Dissolved OxygenWei FANG, Toshio IWAO, Tateshi FUJIURA, Kouichi TAKEYAMA, Gyuwan IM, M ...1995 Volume 57 Issue 1 Pages 41-49
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this study is to develop an aeration nozzle, capable of getting high dissolved oxygen (DO) and control of DO, which is simple in structure and will not be choked with floating materials such as roots and sand. The relationship between the value of DO and the factors affecting the aeration performance of the nozzle was examined. The high value of DO was gained when the length of bubbles was about 90% of the total length of the nozzle. The air intake port diameter was an important factor to control the value of DO.View full abstractDownload PDF (2296K) -
Fruit Detection Using Monochrome TV Camera and Photo-electric SensorSeiichi ARIMA, Tateshi FUJIURA, Naoshi KONDO, Yasunori SHIBANO, Jun YA ...1995 Volume 57 Issue 1 Pages 51-58
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA sensor system which had functions of discrimination, recognition and distance measurement was developed for visual sensor of cucumber harvesting robot. The sensor system consisted of a monochrome TV camera to which 850nm interference filter was attached and a photo-electric sensor which measured the three dimensional shape of not only fruit but leaves and stems. Fruit detecting experiment was done in greenhouse using this sensor system and the following results were obtained. The TV camera could satisfactorily discriminate and recognize fruits which were not hidden by obstacles. The photo-electric sensor could detect distances of fruits and objects which would obstruct the robot when harvesting. It was considered this sensor system would be effective when two sensors were used in combination.View full abstractDownload PDF (5988K) -
High Quality Seedling Production DevicesOsamu SAKAUE1995 Volume 57 Issue 1 Pages 59-66
Published: 1995
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to develop automated seedling production system, robotic and its devices are applied in greenhouse. In this paper, automation of detecting and removing operation of absent or poor seedlings, as well as stimulating and topping operation of seedlings were discussed for the production of high quality seedlings. For detecting non-emerged cells or smaller plants and removing these spots, optical fiber sensor and sucked-out sweeper detect and remove these spots step by step. For brushing plants, ethylene generated by brushing plant body makes plant compact, hard and uniform. For topping transplants, electric power reciprocating mower attached to the front of the robot cuts upper parts of celery plants to get uniform growing before their transplanting.View full abstractDownload PDF (8197K)
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