Method of controlling the working motion of a cutting tool of a tunnel-driving machine over the breast, and apparatus for carrying out the method
US4261617A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1979 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Jan 23, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.