APPARATUS FOR CONTROLLING THE WORKING MOTION OF A CUTTING TOOL OF A TUNNEL-DRIVING MACHINE OVER THE BREAST

摘要

A method of controlling the working motion of a cutting tool of a tunnel-driving machine over the breast, wherein the actual position of the cutting tool is ascertained in consideration of the position of the tunnel-driving machine relative to the desired section of the tunnel, characterized in that at least one point of reference, which is fixed in space, is aligned relative to the longitudinal axis of the tunnel, e.g., be means of a laser beam, the times of travel of signals between at least one such point of reference and two points of the tunnel-driving machine or between at least two such points of reference and at least one point of the tunnel-driving machine are measured, the measured times of travel are subsequently utilized in a trigonometric computation of the actual position of the tunnel-driving machine, and the cutting tool is adjusted to its desired position by reference to the actual position of the cutting machine.