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Volume 58, Issue 2
Displaying 1-19 of 19 articles from this issue
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N. Honami1996 Volume 58 Issue 2 Pages 1-2
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1842K) -
Feasibility as a Tractor EngineChikanori SAKATA, Hideo TERAO, Noboru NOGUCHI1996 Volume 58 Issue 2 Pages 3-10
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo save fossil energy and reduce exhaust gas emission, a dual-fuel tractor engine with alcohol fumigation was developed. This engine has two control modes, that is “diesel fuel mode” and “dual-fuel mode”. With this system, it is able to choose a control mode in various operating conditions at will. Power, heat consumption, NOx concentration and smoke density of the tested engine were examined through a PTO performance test for the two control modes. The performance of each mode indicated as good as a normal aspiration diesel engine of a tractor. In addition to this, on the dual-fuel mode NOx concentration was 40% less than on the diesel mode. Finally, plowing was carried out as feasible test using the dual-fuel tractor. The satisfactory performance of the dual-fuel control system and durability for over-loads of the engine were confirmed.View full abstractDownload PDF (4236K) -
Test of Concentrator's PerformanceLEI Wu, Osamu KITANI, Tsuguo OKAMOTO, Toru TORII1996 Volume 58 Issue 2 Pages 11-17
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSInner Mongolia, where the first author comes from, has abundant wind energy. Windmills become very popular as electric generators. Many families have been using windmill generators to generate electricity. However, they still have many problems in generating small scale electricity, especially when the wind blows weakly. To solve this problem, the authors decided to conduct further research to improve the Savonius windmill. The good features of this windmill are that it will work even though the wind blows strongly or weakly. It also can receive the wind of any direction. The bad point is that it has lower efficiency compared to the other windmills. The main goal of this research is to increase the efficicncy of the Savonius windmill by developing concentrators and diffusers. It is expected that the new system can generate the electric power even with a weak wind. This paper described the concentrator characteristics and their effects on the power performance.View full abstractDownload PDF (731K) -
Satoshi MURATA, Fumihiko TANAKA, Junichi TOKUNAGA, Shoji KOIDE, K. S. ...1996 Volume 58 Issue 2 Pages 19-24
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe characteristics of sorption of grain kernels while soaking in the water, held at the constant temperature of 0, 10, 20, 30 and 40°C respectively, were investigated to determine the absorbing rate constant in moisture transfer equation and the equilibrium moisture content. The equation was derived from the assumption that adsorption would be in opposite direction to the drying process. The absorbing rate content and the equilibrium moisture content were calculated using the experimental results for the second falling rate period based on the theory of diffusion in a plane sheet, and the calculated results agreed with experimental results. It was recognized that there was a temperature dependency of Arrhenius type in the absorbing rate constant k.View full abstractDownload PDF (718K) -
Yoshio HIKIDA, Dong Hai HAN, Takemi ABE1996 Volume 58 Issue 2 Pages 25-30
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn attempt to use the respiration property of grains an as index of the quality control during drying and storage process, the temperature and moisture content dependency of rough rice respiration was investigated. The relationship between temperature and respiration rate closely fitted the Arrhenius' equation and Gore's equation. In the relationship between moisture content and respiration rate, remarkable increase of respiration rate was observed in a region of moisture content above 23-25%d. b. and Arrhenius curve could be adapted for this relation. The respiration rate of rough rice was finally expressed by the Arrhenius' equation and Gore's equation respectively as a function of temperature and moisture content.View full abstractDownload PDF (718K) -
Shuji NISHIMURA, Yoshifumi HONDA, Kenji IMOU, Hiroshi TAKENAGA, Nobuhi ...1996 Volume 58 Issue 2 Pages 31-38
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAn automatic tractor steering system was developed to save labors in farm operations of forage harvesting. A piezoelectric vibratory gyroscope and an ultrasonic Doppler speed sensor were used in the system to estimate the position and direction of the tractor. The voltage output of each sensor was converted into a pulse train by a V/F converter, and the sensor output was integrated easily by counting the number of pulses. The steering was controlled by a personal computer under the combination of on-off and proportional control methods. The results of experiments on farm showed the tractor was controlled well. In 100m of straight driving tests at the speed of 0.8m/s or 1.8m/s, the maximum displacement was less than 0.2m. In the case of 25m square driving at the speed of 0.8m/s, the final displacement was less than 0.5m.View full abstractDownload PDF (985K) -
Proposal of Human Operator Model with AdaptabilityRyo TORISU, Joe IMAE, Shigeru SHIBATA1996 Volume 58 Issue 2 Pages 39-47
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt is well-known that the human operator adapts and manipulates his dynamic characteristics to satisfy the control requirements for the driver/vehicle system, as the operative element in it. The purpose of this paper is to propose a new human operator model with adaptability. The model is a time-variant parameter model in which three PD controller gains are changed to time-variant coefficients. An optimal control algorithm is applied to determine the three gains. In this part of the study (Part 1), the theoretical structure is explained. In the second part of the study (Part 2), the simulation and field test of the lane change maneuvers of a man-articulated vehicle system will be discussed.View full abstractDownload PDF (1026K) -
Yutaka KAIZU, Tsuguo OKAMOTO, Osamu KITANI, Toru TORII1996 Volume 58 Issue 2 Pages 49-56
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo automate the transplant of orchid seedlings, a machine vision system was developed for their classification. The boundary of a seedling image was captured with a black and white camera and approximated using a polar coordinate. An ordered set of sequences of the length between a centroid of the seedling and the boundary was expressed as a time series. Fourier analysis was used for the time series to determine the boundary shape. A successful classification result was obtained by using a projected area and Fourier coeffcients, with vector lengths as the judment criterion.View full abstractDownload PDF (941K) -
Examination of Water Activation Ability Using “Bakuhan-seki”Hiroshi NAKAMURA, Katsumi ISHIKAWA, Yoshiichi OKADA, Kimiko TANABE, Yo ...1996 Volume 58 Issue 2 Pages 57-63
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the activation of water using minerals, negative charge causes pH-buffer and ion exchange actions, “Bakuhan-seki”, which belongs to Quartz Porphyry, forms the micell, and will have pH-buffer and ion exchage actions. In this study, the water activation ability using “Bakuhan-seki” was discussed in order to develop a pH-buffer water treatment system. The tests were carried out by changing the volume and size of “Bakuhan-seki” in the water, and pH-buffer, specific conductance and quantitative analysis of mineral ions were measured. As for the results of the pH-buffer test, the pH of acidic and neutral water increased by “Bakuhan-seki” in the water. On the other hand, the pH of alkaline water decreased by “Bakuhan-seki” in the water. The concentration of four typical exchangeable cations (Na+, K+, Ca2+, Mg2+) in the water fluctuated, and the specific conductance of treated water increased, the maximum being 12.5%.View full abstractDownload PDF (864K) -
Steve W. MUGUCIA, Junichi TAKEDA, Yuichi DEGUCHI, Ryo TORISU1996 Volume 58 Issue 2 Pages 65-74
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper presents theoretical and experimental frequency response analysis of a tractor-trailer combination (TTC). The theoretical analysis uses a linear kinematic vehicle model developed in an earlier study. In the experimental analysis, a simple and accurate method of generating the sinusoidal input is proposed, where the lateral displacement of the center of the tractor front axle is used as the input instead of the front wheel steering angle. The influence of the vehicle dimensions and the path wavelength on the frequency response of the TTC is examined. Theoretical analysis of the frequency response of the TTC to a sinusoidal steer input is also carried out. The study provides useful information on the behavior of the TTC in curved motion.View full abstractDownload PDF (1006K) -
Long Term Operating and Starting TestsChiyuki TOGASHI, Jun-ichi KAMIDE1996 Volume 58 Issue 2 Pages 75-82
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the case of using substitute fuel for engines, the output performance, startability, combustion and long term opration performance are important performance parameters. In this paper, the authors carried out long term operating test (rated revolutions, 75% load) using unrefined rapeseed oil (deacidification oil, degumming oil, hydration-degumming oil and crude oil) to confirm their effect on the engine, and starting test using degumming oil as fuel. As the results, deacidification and hydration-degumming oil were accepted as suitable substitute fuels for small diesel engine. The engine started easily with degumming oil by dropping gasoline from gasoline cup for starting.View full abstractDownload PDF (5108K) -
Continuous Grafiting by an Experimental ModelKen KOBAYASHI, Masato SUZUKI1996 Volume 58 Issue 2 Pages 83-93
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSUtilizing the fundamental technique obtained through the function check model, the experimental model in which other new techniques were incorporated was developed and a continuous grafting of 20-seedlings was performed. A very smooth cutting was attained by changing the cutting mechanism into a rotating arm type which adjusts and cuts the seedlings of stock and scion. Other mechanisms worked well as were expected. The experimental model could make 20 grafted plants continuously within approximately one minute, and the rate of work was about 10 times as that of manual grafting. The work quality was almost the same as manual grafting. Grafting for melons and watermelons with the experimental model were also performed. The experimental model was applicable for both seedlings.View full abstractDownload PDF (8683K) -
Development of Cutting MechanismsKazutomo ICHITO, Mitsuru HACHIYA, Tatsushi TOGASHI, Yasuhiro SASAKI1996 Volume 58 Issue 2 Pages 95-101
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSResearch on Shredder for chopping roll bales to process mixed feed was carried out. Cutting mechanisms and power requirements of break-up or shredding machines on the market were investigated in the first place. From the investgation, strong appeal was recognized to the machine which can cut roll bales uniformly for the purpose of processing mixed feed, and further diffusion of the machine is expected in near future. We decided to develop a new cutting mechanism which cut roll bales squarly with two kinds of cutters arranged in right angle. The power requirement of the mechanism is expected to be low. We adopted a cutting mechanism after comparative examination on three kinds of blades; disk-blade, running-blade and reciprocating-blade.View full abstractDownload PDF (891K) -
Evaluation of Stationary Thermal Environment in Cab by SubjectsTeruyuki MATSUKI, Kanichi KADOTANI1996 Volume 58 Issue 2 Pages 103-111
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this report, experiments of the heater systems under the cold condition in winter and the cooler systems under the hot condition in summer were conducted by using two types of the air conditioners with each air outlets in the cab of the construction machinery. The subjects in the cab simulated actual operations using four levers. Stationary thermal environment was evaluated by measuring their psychological evaluations and physiological effects. At the same time, PMV were measured using a thermal comfort meter and were compared with the data of subjects. As the result of it, it was found that the separated type of air outlets was superior in the both heating and cooling conditions with regard to thermal comfort, and ventilation was necessary in the small space like the cab.View full abstractDownload PDF (1235K) -
Noboru NOGUCHI, Kohta ISHII, Hideo TERAO1996 Volume 58 Issue 2 Pages 113-122
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA small diesel engine was modified to operate in a dual-fuel mode with methane that was one of the alternate fuels. A microprocessor system for controlling the diesel fuel flow rate and methane flow rate was designed. The system was able to measure the flow rate of methane, the engine torque and the engine speed electrically in addition to the control. The technology for supplying diesel fuel and methane was developed using this control system, in order to control the dual-fuel engine optimaly in terms of its performance characteristics, such as the efficiency, the smoke and the replacement of methane. The advantages of this technology using the weighting method were (1) to be able to control optimally the dual-fuel engine under the general performance derived from all parameters, and (2) to determine the weight of each parameter at will as occasion demands in designing a dual-fuel diesel engine.View full abstractDownload PDF (1050K) -
Yasuhiro OKAMURA1996 Volume 58 Issue 2 Pages 123-126
Published: 1996
Released on J-STAGE: April 30, 2010
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Naoaki KANAMARU1996 Volume 58 Issue 2 Pages 127-132
Published: 1996
Released on J-STAGE: April 30, 2010
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T. KAMIMURA1996 Volume 58 Issue 2 Pages 133-134
Published: 1996
Released on J-STAGE: April 30, 2010
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S. NAKASHIMA1996 Volume 58 Issue 2 Pages 135-136
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (220K)
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