| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1990: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Research Abstract |
Head-feeding type thresher for Japanese small rice combine(Jidatsu combine)have advantages such as low power consumption and high threshing quality. However, the thresher have disadvantages such as no-good adaptability to other crops except rice and impossibility to realize high feed rate and large machine. This study aim to improve the default of current head-feeding type thresher by means of control technology. At the beginning of this study, physical property of crop must be measured. Wheat have most different characteristic comparing with rice. Hence, Physical property of rice and wheat were measured. A head of rice have many flexible branch with many grains. Transfer matrix method is fitted to analysis of branch system such as rice. Hence, computer program was developed by means of Transfer matrix method in order to analyze vibration characteristic. It, also, is clarified by means of Liner deviation analysis method that effect of scatter of grain mass and stem rigidity is few. Capability to grow threshing performance up in the case of adding automatic control to current head-feeding type thresher is investigated. As a result, the thresher cannot be improved by means of automatic control. Therefore, new thresher are planned. For the purpose of confirmation of function of new thresher and developing sensing device, scale model are manufactured. Same threshing quality are obtained provided the same threshing conditions between current and new thresher. And it is possible to detect happening of break-ears by the sensor. Analytical force acting on threshing tooth coincide with measured force. Hence, it is clarified to be able to design new thresher based on previous reported threshing theory. Many knowledges are obtained by means of this study.
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