Title:
BLADE CONTROLLER OF BULLDOZER
Document Type and Number:
WIPO Patent Application WO/1991/004378
Kind Code:
A1
Abstract:
This invention relates to a blade controller of a bulldozer which can level or grade the ground smoothly, highly accurately, efficiently and quickly without being affected by pitching of the tractor main body of a bulldozer and by a soil moving quantity of the blade. The controller includes at least two light receptors (2, 3) disposed in a longitudinal direction of the tractor main body (1) in the spaced-apart relation, detecting the optical reference surface (6) formed by a projector (4) and outputting the respective level signals, and a blade controller (13) for controlling a hydraulic valve actuator (14) operating the blade (8) of the bulldozer in accordance with the level signals. Each light receptor (2, 3) can have a three-dimensional position detection function for detecting a three-dimensional position of the tractor main body (1) and in this case, the blade controller (13) controls the hydraulic valve actuator on the basis of an output signal from a position measuring controller (23) for determining the work-done data of the work upon receiving the level signal outputted from each light receptor.
Inventors:
SHINBO TETSUYA (JP)
ONO TOYOICHI (JP)
ONO TOYOICHI (JP)
Application Number:
PCT/JP1989/000943
Publication Date:
April 04, 1991
Filing Date:
September 14, 1989
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
E02F3/84; E02F3/85; (IPC1-7): E02F3/85
Foreign References:
| JPS55105036A | 1980-08-12 | |||
| JPS5921836A | 1984-02-03 | |||
| JPS5253363Y2 | 1977-12-03 | |||
| US3887012A | 1975-06-03 |
Other References:
See also references of EP 0443026A4
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