Robot-Assisted 3D Mapping at Hamm (Westf.) Central Station

These areas were to be filled or repurposed—but first, their extent and volume needed to be determined with precision. 

The situation was further complicated by several stairways leading to a second underground level, whose condition was as unknown as any potential hazards on site. Dark, narrow access points and potentially contaminated air made it impossible for staff to enter. A classic “dull, dirty & dangerous” scenario where modern robotics provides the safe alternative. 

The Task: Complete and Safe Mapping of the Underground Structures 

DB Systemtechnik was commissioned to systematically capture, measure, and integrate all underground areas into a comprehensive data model—in other words, to perform a full-scale mapping. This required a multi-stage technical and organizational approach: 

• Gathering customer requirements and inspecting all accessible areas, including checking access points using thermal imaging. 
• Selecting suitable robotic systems that meet the specific conditions underground. 
• Stakeholder management involving the works council, occupational safety, plant and railway operations management, and other stakeholders. 
• Conducting a detailed risk analysis, particularly regarding occupational safety and technical feasibility. 
• Commissioning and coordinating a subcontractor, including on-site support during the deployment of robotics. 
• Preparing a comprehensive final report documenting feasibility, system performance, and evaluation of the use case. 

The Solution: Precise 3D Data Enabled by LIDAR Robotics 

A remote-controlled robot equipped with a high-resolution LIDAR system was used for the exploration. As it moved through the tunnels and rooms, the 3D scanner generated a dense point cloud from which both geometric structures and the exact volume of the cavities could be derived. Remote operation ensured that all hazardous situations were avoided—neither potential gas accumulations nor tripping or fall risks posed any danger to staff. 

The Result: High-Precision Data Without Risk 

By using robotics, DB InfraGo received a detailed 3D mapping and extensive imagery of building sections that had previously been nearly inaccessible—safe, efficient, and without any human entry into the areas. The data now serves as a reliable basis for the planned backfilling and further modernization measures at the station. 

This project impressively demonstrates how digital surveying technologies and robotics help capture historical infrastructure with precision while maintaining the highest safety standards.