| 摘要 |
PURPOSE:To improve the operation efficiency in holding properly the states of a combine in a rice threshing load, etc., by providing ranges of proper rotational frequencies of a prime motor with discrimination according to whether a working machine operates by receiving power from the prime motor is operation or not. CONSTITUTION:A rice-plant sensor 1, when there is a rice plant in its passage, turns on to output a signal to a comparing circuit 4 and an inverter 8. The rotational frequency N of a threshing barrel is detected by a rotation sensor 2 and a rotational-frequency detector 3 and sent to comparing circuits 4 and 5. A setting circuit 6 sets and sends the upper and lower limit of a proper rotational frequency druing threshing operation to the comparing circuit 4. Arithmetic is performed by the comparing circuit when the sensor 1 is on or a comparing circuit 5 through the inverter 8 when off, and a normal or light load is sent to an output circiut 9 to display the state on one of display parts 10-12. Consequently, the state of the load is displayed properly and efficient operation is performed. |
