| 摘要 |
<p>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.</p> |
