| 摘要 |
PROBLEM TO BE SOLVED: To provide a combine harvester capable of detecting a loss amount precisely even in the case where a foreign substance sticks to a loss sensor.SOLUTION: A combine harvester comprises: a thresher for threshing reaped grain culm; an oscillation selector for selecting the grains threshed by the thresher; a discharge passage and a dust exhaust port for discharging the product selected by the oscillation selector; a loss sensor 34 for detecting the impact force of the grains contained in the processed product; and a controller for calculating, on the basis of the detected value by the loss sensor 34, the grain amount to be discharged from the discharge passage and the dust exhaust port. The controller determines whether or not the detection value by the loss sensor 34 is lower than a predetermined threshold value, and notices that the loss sensor 34 is in a state to be cleaned, if it is determined that the detected value is lower than the threshold value. |
