Multi-layer LiDAR delivers reliable object detection in tough tunnel conditions
Underground tunnel work is no place for guesswork. With limited visibility, tight spaces, and explosive hazards, the margin for error is razor thin. Traditional camera systems often struggle in these conditions, leaving operators with unreliable data and limited reaction time. That’s why CORAIL-TUNNELIER turned to SICK’s multi-layer LiDAR technology—a solution built to thrive where others fail.
In their latest excavation project, CORAIL-TUNNELIER needed a smarter, more resilient way to detect obstacles and prevent collisions. Enter the multiScan165, a rugged 3D LiDAR sensor designed to deliver precise, real-time object detection—even in the most demanding underground environments.
Tackling Tunnel Challenges with Smarter Tech
Tunnel excavation presents unique challenges for obstacle detection. Systems must meet strict ATEX standards for explosive environments, which means they need to be sealed, rugged, and reliable. CORAIL-TUNNELIER—a leader in designing and manufacturing mobile machinery for underground work—had previously relied on camera-based systems. But those setups required air cooling and struggled with visibility and environmental interference.
To overcome these limitations, CORAIL-TUNNELIER partnered with SICK to deploy multi-layer LiDAR technology for a new railway tunnel project.
LiDAR That Goes the Distance
For this initiative, CORAIL-TUNNELIER equipped its Rubber-Tired Trains (TSPs) with SICK’s multiScan165 sensor—part of the multiScan100 product family. Each train cab received a sensor to assist operators and enable reliable anti-collision functionality.
The multiScan165 stood out for several reasons:
- Compact design for easy integration into a sealed, bell-shaped glass housing.
- Shock-resistant build for rugged environments.
- Low heat output, eliminating the need for extra cooling.
- High-resolution multi-layer scanning, ensuring accurate detection even in low-visibility conditions.
Initial tests showed strong performance in signal stability and obstacle detection, even through the protective housing.
Built for Harsh Conditions
Tunnel environments are tough—metal structures cause reflective interference, and excavation work kicks up dust, moisture, and debris. The multiScan165 handles it all. It even includes contamination detection, alerting operators when lenses need cleaning.
Compared to previous camera-based systems, the LiDAR solution offers:
- Greater detection range
- Faster response times
- Improved speed and maneuverability for vehicles
A Trusted Partnership
CORAIL-TUNNELIER’s decision to go with SICK wasn’t just about the tech—it was about trust. The two companies have a strong history of collaboration, with SICK previously supplying sensors like the MRS1000, LDR-MRS, and RMS1000, along with expert support and service.
Looking Ahead: Toward Autonomous Operation
CORAIL-TUNNELIER plans to make the multiScan165 a standard feature on all operator-assist machines. Future applications may leverage its full 360° scanning capability for enhanced guidance and automation. As the company explores autonomous driving systems, the multiScan100 family is poised to play a key role.
