Earth working – Automatic power control – Land leveller type
Patent
1979-06-07
1981-08-11
Stouffer, Richard T.
Earth working
Automatic power control
Land leveller type
172 7, A01B 63111, E02F 376
Patent
active
042829330
ABSTRACT:
An automatic control device for an earth working equipment is directed to remove influence of acceleration on an inclinometer mounted on a vehicle body and thereby to effect an accurate blade control. An acceleration compensation arithmatic circuit receives outputs of a pair of inclinometer and removes an acceleration component by performing integration twice. This circuit is also designed to remove an integration error. Further, according to the invention, a Doppler radar system and an engine speed/throttle opening system are employed for detection of overload applied to the blade so that one of the detection systems which is most suitable for an actual work can be selected. Furthermore, the device includes both blade height controllers and tilt controllers and performs the two control operations most effectively. Response characteristics are improved by conducting the tilt control within a time interval during which the bade is in a holding state which time interval occurs in the control operation by the blade height controller.
REFERENCES:
patent: 3831683 (1974-08-01), Ikeda et al.
patent: 4157118 (1979-06-01), Sugami et al.
patent: 4159474 (1979-06-01), Wooldridge
patent: 4166506 (1979-09-01), Tezuka et al.
Manseki Teruo
Nakayama Tetsuya
Shimizu Koh
Suganami Takashi
Takeda Tashiro
Kabushiki Kaisha Komatsu Seisakusho
Stouffer Richard T.
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