| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of continuously checking sensors, i.e., a displacement sensor and a position-detecting sensor. SOLUTION: The combine harvester 10 has a control unit 74 capable of judging whether a displacement sensor 70 is working normally or not and a potentiometer 72 outputting an analogue signal corresponding to position is set normally or not and has a horn 76 informing predetermined signals and, when the control unit 74 judges that the displacement sensor 70 works normally or the potentiometer 72 is normally set, the horn 76 sounds through an output port 78. And, a changeover switch 80 capable of shutting off or connecting the output port and the horn 76 is set between the output port 78 and the horn 76 and the horn 76 does not inform of the result of the sensor check when the changeover switch 80 is shut off.
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