The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1981
Filed:
Jun. 07, 1979
Takashi Suganami, Fujisawa, JP;
Tashiro Takeda, Hiratsuka, JP;
Tetsuya Nakayama, Fujisawa, JP;
Koh Shimizu, Tokyo, JP;
Teruo Manseki, Fujisawa, JP;
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
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.