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    • 91. 发明专利
    • REAPING HEIGHT CONTROLLER OF COMBINE
    • JPH0367515A
    • 1991-03-22
    • JP20356489
    • 1989-08-04
    • ISEKI AGRICULT MACH
    • WATANABE HITOSHIIKEGAWA HIROSHIYOSHIMURA FUMIOONO HIROYOSHI
    • A01D34/24
    • PURPOSE:To prevent maloperation in starting reaping height control and simultaneously facilitate setting of the control target value by sensing a point where operating conditions are complete with an ultrasonic sensor and lifting or lowering a reaper while carrying out control using the sensed value as the control target value. CONSTITUTION:Operation is started when operating conditions of a reaping height automatic switch ON, a gain clum sensor ON and a connected transmission clutch for a thresher are complete. Sensing of ground height of a reaper 1 is started with an ultrasonic sensor 2 from a point where the aforementioned operating conditions are complete. Data of the ground height sensed with the ultrasonic sensor 2 are memorized as the control target value and the reaper 1 is subsequently lifted or lowered relatively to a car body 3 so as to maintain the ground height at the target value while comparing the ground height sensed by the ultrasonic sensor 2 with the control target value. Thereby, the reaping height control is performed with a reaping height controller 4.