| 摘要 |
PROBLEM TO BE SOLVED: To provide a combine equipped with a means for regulating the height of a reaping part for reaping cereal culms. SOLUTION: This combine is provided by detecting the height (h) of the reaping part from a field surface based on the detected values of an ultra sonic wave sensor (S13) and calculating the deviationΔfrom an objective value of the reaping height (S14), also detecting the height (p) of the reaping part from a standard surface based on the detected value of an ascending and descending position sensor (S16) and calculating the difference of 2 kinds of heights (h-p) (S17), and then calculating a general height changing amount dH based on the changing amount of the height of the field surface on traveling a prescribed distance and the change of the relative height of the reaping part over time (S20) to determine the lifting up and down force by using the deviationΔand the changing amount of the general height-changing amount dH (S21), and regulating the ascending and descending transfer of the reaping part based on the determined lifting up and down force (S22). COPYRIGHT: (C)2007,JPO&INPIT
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