All issues
Volume 51, Issue 5
Displaying 1-20 of 20 articles from this issue
- |<
- <
- 1
- >
- >|
-
K. MUNAKATA1989 Volume 51 Issue 5 Pages 1-2
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2373K) -
Optimal operation curve and its characteristicsCheng ZOU, Jun SAKAI, Kei NAKAJI, Jiaolong LIU1989 Volume 51 Issue 5 Pages 3-10
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to improve farm machinery efficiency and optimize engine performance, an optimal control system for a power-transmission-equipment combination was studied.
In this report, the optimal operation curve was obtained by a statistical analysis with least squares fitting program. The relationship between engine power and specific fuel consumption of the optimal operation curve was proposed which described a new concept to design an engine under minimum energy input.
Furthermore, large differences in specific fuel consumption between the optimal operation condition, the worst operation condition and ordinary engine speed operation conditions of the test engine were clarified.View full abstractDownload PDF (1279K) -
Characteristics of Soil Reaction on a Lugged WheelX. L. Wang, T. TANAKA, M. YAMAZAKI1989 Volume 51 Issue 5 Pages 11-18
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSMany experimental studies on a lugged wheel-soil interaction have been conducted. In most of them, the method of mechanically giving predetermined level of slip and sinkage to a lugged wheel is adopted. The reaction forces to lugs as the result of the above conditions seem to be equal to cutting resistance of metal. We thought that the situation of soil-lug system by such method does not represent the actual behaviour. In this study, therefore, a test device giving a freedom of vertical direction to a lugged wheel and selfpropelled mechanism was constructed. Slip, sinkage and reaction forces obtained were thought to represent the actual phenomena of soil-lug interaction well.
In this paper, soil reaction forces acting on a lug and both pull force and lift force induced at lugs-soil contact were discussed. Estimation of soil reaction forces to a lug was also investigated analytically.View full abstractDownload PDF (3347K) -
Two-Mirror Method using Convex MirrorYoshinobu OHTA, Tatsuo HIROMA1989 Volume 51 Issue 5 Pages 19-27
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn field works on a tractor, operator has to look backward frequently to check how the attached implement works and to control the implement accordingly while steering the tractor forward. Thus, operator usually works in a twisted posture. To improve this working condition, the authors developed a method which enables operator to obtain, without turning his head, the rear visibility of tractor through two mirrors installed on tractor.
The two-mirror method using plane mirrors was presented in the previous report, and in this report, the relationship between the indirect visual range on the rear of tractor and the size, location and radius of convexity of mirrors is discussed in case of convex mirrors. A series of experiments showed that clearer and wider visibility on the rear of tractor is secured with a combination of a convex mirror as the upper one and a plane mirror as the front one.View full abstractDownload PDF (3857K) -
Trial-made Model and 1ts TestsIkjoo JANG, Osamu KITANI, Tsuguo OKAMOTO1989 Volume 51 Issue 5 Pages 29-36
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSBased on the research results of Part I, a trial-made model of double blade moldboard plow was designed and constructed by installing hydraulic driven disk blade in front of the moldboard.
Tests were conducted on the effect of disk position, angle and disk rotation upon draft and power requirement. Furthermore, optimal disk position, angle and rotational speed as well as numbers of disk in view of field performance were obtained through these tests.View full abstractDownload PDF (3271K) -
Tsuguo OKAMOTO, Osamu KITANI1989 Volume 51 Issue 5 Pages 37-45
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe aim of this study is to develop a robotic system for biotechnological operations such as tissue cultre opertions in seedling production system. It is important to handle tissue like PLB and callus in tissue culture operations in germfree bioclean rooms. To carry out these operations without manual works, a callus handling system for subculture with robotics was developed and tested.
This system consisted of a manipulator-gripper system, an image processing system and a computer control system. The manipulator and TV camera in a clean-bench were controlled by a 16-bits personal computer in real time. A monochromatic TV camera was used to get image data of callus. It was able to pick up softly a small piece of propagating callus which was delicate and vulnerable in vitro. The robotic manipulator held it between its fingers and put it into a new culture medium automatically. Finger force for gripping callus was measured with strain gage sensors and was constantly controlled with sensor feedback by a computer. The manipulator used here was a multi-joint small industrial robot.View full abstractDownload PDF (8054K) -
Masaki MATSUO, Toshitaka UCHINO1989 Volume 51 Issue 5 Pages 47-53
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA high voltage electrode was mounted vertically on a carrying device under the ceiling of a small film plastic greenhouse, and was driven after non-heating fog was sprayed.
Though the deposit density by the electrostatic application system with corona discharge of the vertical electrode was greater than that by the conventional method, the latter method showed better deposit uniformity than the former, because in case of traveling electrode, greater deposition was observed on the sampling pieces near the electrode. In order to improve the deposit uniformity of the electrostatic application system, the effect of air blast by a small axial fan attached to the electrode or by the compressor of the fog machine, and the timing of applying high voltage were examined. 14min. air blast by the compressor or a waiting period of 10min. before high voltage application contributed to the deposit uniformity.View full abstractDownload PDF (1061K) -
Influence of Peel on Measurement and Calculation of Internal PropertiesKoro KATO1989 Volume 51 Issue 5 Pages 55-61
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt is necessary that the shape, size and electrical properties of peels of fruits have very litte effect on the inspection results for the practical application of the nondestructive electrical inspection of the internal quality of fruits and vegetables.
To investigate the influence of peels in nondestructive measurement, we measured the electrical properties of peeled fruits (whole sarcocarps), and compared with those of whole fruits. Our experiments revealed that, although at lower measuring frequencies the impedance of peels is so high that their influence is too large, at higher frequency over 1MHz, the differences between electrical properties of peels and those of sarcocarps are reduced to such low levels that the influence of peels is small.
Next, we tried to calculate the impedance of sarcocarps from the impedance of the layer near the surface and the impedance of whole fruit. The calculated values of sarcocarps by this nondestructive correction method agree well with the values of sarcocarps measured after removing peels.View full abstractDownload PDF (1213K) -
Satoshi MURATA, Takahisa MATSUOKA1989 Volume 51 Issue 5 Pages 63-69
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAn equation was presented to the problem of the transient pressure distribution of fixed bed during evacuation process for designing and operating of vacuum cooling grain storage silo.
The non-linear diffusion equation with the coefficient of pressure itself was solved numerically by the finite element method.
The calculate results were in fair agreement with the experiment.View full abstractDownload PDF (822K) -
Setuo HAYASHI1989 Volume 51 Issue 5 Pages 71-77
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn drying persimmons, the secondary surface formed after peeling affects the quality of products.
In this paper, the author obtained the value of moisture content of secondary surface through drying experiments, and clarified the relation between moisture content and discoloration. The control range of moisture content of secondary surface to prevent quality deterioration is also discussed, and a possibility of forecasting moisture content from penetrating resistance and drying time is presented with the use of multiple regression analysis.View full abstractDownload PDF (946K) -
Mamoru NISHIOKA, Shigeaki YAMAZAKI, Nakamichi YAMASAKI1989 Volume 51 Issue 5 Pages 79-84
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSHouse wastes containing human waste increase rapidly in recent years. The aim of the present study is to obtain fundamental knowledge for hydrothermal decomposition of these wastes on an industrial scale. For mass treatment of wastes, it is impossible to rely on the conventional batch method with autoclaves, hence we produced a simple continuous pipeline system, which was composed of injection pump, exchanger, preheater, and reactor, for hydrothermal decomposition. Characteristics tests of this pipeline system were performed.
The test results showed that, though the temperature gradient in the reactor became large with the inflow of water, the rate of the elevation of temperature in the reactor remained uniform.
The treatment ability of the pipeline system was discussed with decomposition ratio of lepidolite. When lepidolite was decomposed by the pipeline system, decomposition ratio was reached about 90% at 360°C in the reactor. High decomposition ratio was obtained as the case of using an autoclave under same hydrothermal conition.View full abstractDownload PDF (3345K) -
Mitsuo IIMOTO1989 Volume 51 Issue 5 Pages 85-90
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1005K) -
Drying ProcedureS. J. OMAR, Ritsuya YAMASHITA, Kiyokazu GOTO1989 Volume 51 Issue 5 Pages 91-95
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (776K) -
Flow Velocity of Particles Mixed in the Flowing Brown Rice on the Shaking TableHatsuo KOJIMA, Ritsuya YAMASHITA1989 Volume 51 Issue 5 Pages 97-103
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1117K) -
Shigeo UMEDA1989 Volume 51 Issue 5 Pages 105-109
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (645K) -
[in Japanese]1989 Volume 51 Issue 5 Pages 111-114
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2226K) -
[in Japanese]1989 Volume 51 Issue 5 Pages 115-119
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2739K) -
Kyo KOBAYASHI1989 Volume 51 Issue 5 Pages 121-125
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2236K) -
Yasumasa KOGA1989 Volume 51 Issue 5 Pages 127-135
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESS -
[in Japanese]1989 Volume 51 Issue 5 Pages 137-143
Published: 1989
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2072K)
- |<
- <
- 1
- >
- >|