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Volume 49, Issue 5
Displaying 1-11 of 11 articles from this issue
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Toyohiko KANATSU1987 Volume 49 Issue 5 Pages 425-426
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (421K) -
Plunger Thrust Control of Compressed Biomass FeederJinzo NAGAHIRO, Ken HIGUCHI1987 Volume 49 Issue 5 Pages 427-433
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe crank type in two types of small-sized generators built as a trial for study must be equipped with a control device which is able to maintain the plunger thrust fluctuations of a compressed biomass feeder within a given range set up in advance. This study was done to develop the control device. The generator equipped with the control device made on an experimental basis was operated at the thermal decomposition temperatures of 700 and 900°C.
Throughout the operation, the plunger thrust fluctuations could be maintained within the desired control amount of 5.0-8.5MPa{50-87kgf/cm2}. As a result, it was confirmed that the developed control device could be put enough for practical use.View full abstractDownload PDF (1070K) -
Satoshi MURATA, Akio TAGAWA, Sadato ISHIBASHI1987 Volume 49 Issue 5 Pages 435-442
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAvoiding grain kernel damage (known commonly as cracking in rice kernels) during drying and wetting, is one of the most important observations to be made in grain kernel drying.
In this paper, coefficients of thermal expansion and hygroscopic expansion, which are necessary to calculate tensile stress or shrinkage stress causing grain kernel crack formation induced by heat and moisture, were determined.
In order to determine these parameters, true density and true volume of grains in bulk at various temperatures and moisture contents were measured, and the effect of temperature and moisture content on volume change of the grains was investigated.
Hence, specific volume based on dry material of grain could be written as a function of temperature and moisture content.
From this equation, coefficients of thermal and hygroscopic expansion were determined as a function of temperature and moisture content.View full abstractDownload PDF (1176K) -
Koro KATO, Ritsuya YAMASHITA1987 Volume 49 Issue 5 Pages 443-450
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn Japan, residual insecticide for stored-grain insect was detected in rice, then the pest control by chemicals in the stage of rice circulation has been prohibited, recently. In this study, to control the stored-rice insect with no chemicales, radio frequency dielectric heating treatments for rice weevil were investigated. It is better to remain the grain temperature low and to heat the insects selectively in the dielectric heating. To find the optimum frequency of the selective heating of the insects, the frequency characteristics of the dielectric constant εr′ and the dielectric loss factor εr″ for both the rice weevil and brown rice were measured. Actually, the dielectric heating treatments for every developmental stage of rice weevil were experimented comparing with the heating by heated air and the mortalities of each developmental stage were examined. As a result, at the range of 10-70MHz the dielectric loss factor of insects was larger than that of grain due to the moisture content difference between insects and grain, and the selective heating of the insects was recognized. It became clear that not only the adult weevils out of grain kernels but also the chrysalises, larvae and eggs in grain kernel were also effectively controlled by dielectric heating.View full abstractDownload PDF (1298K) -
Hiroshi KONDO, Katsumori SATO, Noboru SUGIYAMA1987 Volume 49 Issue 5 Pages 451-458
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAlthough the linear relationship between contact pressure p and sinkage S on the double logarithmic graph has been widely used for the treatment of the sinkage data, there is a problem in terms of accuracy to express the relationship by a single power function since there exists broken point around 0.67 times of the ultimate bearing capacity.
A method of non-linear regression for the p-S relationships using a exponential function similar to the one which applied by Janosi for the shearing curve of soils is presented.
By this method, the scale effect, which is the important factor in discussing the sinkage of vehicles and the motion resistance, can be simply expressed by propotioning the shape factor to the dimension of the plate.View full abstractDownload PDF (1020K) -
Masaki MATSUO, Toshitaka UCHINO, Mitsuo IIMOTO1987 Volume 49 Issue 5 Pages 459-466
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA twin fluid nozzle with an outer annular induction charging electrode was designed and investigated to measure and to evaluate its deposit pattern, spread droplet size, collector current, power supply current and nozzle current.
The effects of applied voltage, atomizing air pressure, liquid flow rate and distance between nozzle and electrode on apparent charge to mass ratio were discussed.
With increase of applied voltage up to -5--8kV, the apparent charge to mass ratio increased very rapidly, and then decreased gradually. The higher the atomizing air pressure, the greater linearly the apparent charge to mass ratio. To obtain the efficient electrostatic spraying, it would be desired that liquid flow rate is lower, so that with increase of liquid flow rate, the apparent charge to mass ratio decreased.
Because of high correlation coefficient between the apparent charge to mass ratio and the deposit density, it would be possible to estimate the deposit density by the apparent charge to mass ratio.
In the case of this testing apparatus, the highest apparent charge to mass ratio was 3.2mC/kg under the condition that atomizing air pressure, liquid flow rate, distance between nozzle and electrode, and operating voltage were 392kPa, 130ml/min, 16mm, -7.8kV, respectively.View full abstractDownload PDF (1154K) -
Modal Analysis of Transfer Function by Method of Three points SupportingPeng CHEN, Masasuke ICHIKAWA, Mitsushi YAMASHITA, Xiaolan ZHAO, Jun SA ...1987 Volume 49 Issue 5 Pages 467-475
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe method of vibrating tests which obtain the transfer function of a component in order to analysis the mode of the side drive rotary tilling devices by using the building block method, were investigated. The method of three points supporting for vibrating tests was proposed as a new vibrating test to make the transfer function more accurate, because of the component can not be perfect free state. The proposed method was recognized clearly by the model of spring-lumped mass system and the finite element method of steel plate, and discussed the valuation of error based on reliability for results.
As a results, the transfer function of component was able to be obtained in a higher accuracy and a closer free state. Therefore, it was considered that this proposed method can be applied to the modal analysis for the side drive type rotary tilling devices.View full abstractDownload PDF (2697K) -
Discriminating Experiment by use of R, G, B filtersNaoshi KONDO, Shunzo ENDO1987 Volume 49 Issue 5 Pages 476-482
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt is considered that a method of comparing color signals from a color T. V. camera is one of effective methods in case of discriminating fruits from other materials such as leaves and stems by a visual sensor.
In this report, a visual sensor which vas composed of an area type image sensor, R, G, B filters, T. V. camera lens and so on was made as a trial, and we experimented on the discrimination of fruits from their leaves by use of two of R, G, B filters in order to examine the distribution of color component ratio of each fruit and its leaves and to obtain the most adequate pair of filters for the discrimination. In this experiment, tomatoes, eggplants, cucumbers, sweet peppers, mandarin oranges, persimon and their leaves were used as discriminated objects.View full abstractDownload PDF (6409K) -
Development of New Steering MethodNobuki YAMANA, Tomohiro TAKIGAWA, Kazutomo OKUI, Michio IRIE1987 Volume 49 Issue 5 Pages 483-491
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo improve working capacity and operating accuracy of small mower-loader, especially by preventing off-tracking phenomenon, authors developed new steering method called dual steering, which is the combination of articulated frame steesing and rear wheel steering. The method to make the radii at inner front and rear wheels same by use of the dual steering was also developed and confirmed by experimental mower-loader equipping dual steering.
It was shown that the dual steering decreased steering torque when 4 wheels drive was chosen. The off-tacking area at the turning point caused by the dual steering was considerably narrower than by articulated steering. However, off-tacking phenomenon could not be exclued, when steering speed was fast.View full abstractDownload PDF (3350K) -
On the Disk Sensor for Continuous Measuring of Soil HardnessMinoru KOMATSU, Hiroshi NAKAO1987 Volume 49 Issue 5 Pages 493-496
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (623K) -
Study on Fertilizer Drill for Walking Type Tractor for Volcanic SoilYoshiichi OKADA, Katsumi ISHIKAWA1987 Volume 49 Issue 5 Pages 497-503
Published: 1987
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1103K)
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