Obayashi Corporation/Tunnel completion/monitoring UGV development, remote control of completion measurement and work monitoring
1.2 meters long, 1.0 meters wide, and 1.5 meters high as-built/surveillance UGV
Obayashi Corporation has developed a "finished form/monitoring UGV (automatic driving vehicle)" that remotely controls the finished form measurement and work monitoring of mountain tunnels. Equipped with a scanner to measure the finished shape and a face camera to monitor the work status. While remotely controlling the concrete spraying machine with a remote control, remote monitoring using camera images and confirmation of insufficient spraying areas with a scanner can be performed at the same time. By unmanning the area directly under the face, we will realize construction that ensures both safety and quality.
The UGV approaches the face and heavy machinery, and uses the mounted scanner to measure the finished form of excavation and shotcrete. Comparing with the design cross section, ▽ excavation shape ▽ finish surface of sprayed concrete ▽ spray thickness - calculated three control points. The video from the face camera will be used for face evaluation and collapse detection systems using remote presence and AI to further improve safety.
Through the images of four mobile cameras attached to the front, back, left and right of the UGV, it can be operated wirelessly to move. It can be operated remotely from a distance of up to 400 meters. Since it can run even in springs and places with small rock masses, it is possible to quantitatively measure and monitor the finished shape without having to approach the face or heavy machinery.
In mountain tunnel construction, we visually check the finished form of excavation and shotcrete. The problem was that it was easily influenced by experience and it was not possible to make quantitative judgments. Since the confirmation of the completed work and the monitoring of the work are carried out by workers near the working face and heavy machinery, there is a risk of disasters such as the collapse of earth, sand, and bedrock, or coming into contact with heavy machinery.
