Method and apparatus for controlling direction of excavating...

Details Method and apparatus for controlling direction of excavating... Method and apparatus for controlling direction of excavating...

G - Physics

05

D

G05D 3/12 (2006.01) E21D 9/00 (2006.01) G01C 7/06 (2006.01)

Patent

CA 2073669

There is disclosed a method and an apparatus for easily controlling the advancing direction of an excavating machine without causing the excavating machine to largely trace in a zigzag way. The direction control is done by the steps of mounting a reflector on a head portion of a shield body so as to receive a light beam directed along an imaginary reference line, mounting a target on a tail portion of the shield body so as to receive the reflected light beam from the reflector, controlling means for correcting the direction so that the reflected light beam may be irradiated at an objective position within the target, and thereby controlling the advancing direction of the excavating machine so that a subjective portion at the top end of the head portion may follow along the reference line.

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