New measurement and control technology in tunnelling - Tunnel Engineering: Basics and Additional Services for Design and Construction - page 255

Figure 6-10 Setting the position of a
drill jumbo with a tunnel laser; Atlas
Copco Deutschland GmbH.
6.3.2 Determining the position of a drilling boom
One simple example for the surveying of the position of drilling feeds is the Tunnel-Angie
system from Ilmeg System AB, Nyköping. Inclinometers on the drill feed determine their
inclination against the vertical and this is displayed in the control position. This gives the
inclination of the drill holes, which is particularly important in the crown and the invert
(Fig. 6-11). The horizontal angle of the drill feeds is determined by another separately
installed system, for which angle sensors are mounted on the hinges of the drilling boom.
The sum of the two angles of the drilling boom hinges is displayed in the control position
and this gives the total angle between drill feed and base vehicle.
Figure 6-11 Record-
ing of the vertical (top)
and horizontal (bottom)
positions of the drill feed
using inclinometer and
angle sensor. Tunnel-Angie
System from Ilmeg
System AB [95].