Geometry
Automated track geometry measurement system that gives engineers a continuous, data-rich picture of the track condition – captured from onboard in-service and maintenance fleet.
An Automated Geometry Measuring System
AIVR Geometry is an automated system that measures and assesses railway track geometry – the positional relationship between rails, in three dimensions. Optical and inertial sensors mounted on board moving trains measure key geometry metrics, analyse the resulting data and allow engineers to identify potential faults before failure.
The system monitors a comprehensive range of track geometry parameters which are particularly aligned to Network Rail rigorous Geometry measurements, giving engineers a detailed picture of the track condition: Gauge, Twist (3m, 35m, 70m), Top (35m and 70m), Alignment (35m and 70m), Cross Level, Curvature and Cant Deficiency.
To find out more about how AIVR Geometry works, read the AIVR Geometry explainer.
Inspect Geometry data on the AIVR Platform
The AIVR Platform’s specialist interface allows engineers to examine the areas of track they need to see. Geometry parameter graphs are displayed alongside synchronised line-scanning imagery and forward-facing video, giving engineers both the data and the visual evidence in a single workspace.
- Geometry traces displayed synch with machine learning detections on the line-scanning imagery, including joints, sleepers, and track components
- Dip angles are automatically matched with nearby joints for rapid joint condition assessment.
- Data can be exported via PDF, CSV, and JSON for sharing with infrastructure owners, maintenance teams and third parties.
This integrated approach allows maintenance teams to identify and prioritise areas of potential risk, assess deterioration over time, and make data-driven decisions to support track access planning.
Rail Profile Data
AIVR Geometry also captures half-rail profile data at 2-metre sample rate, providing a precise picture of rail wear and cross-sectional condition alongside the standard geometry parameters.
The system plots the actual measured profile against an inferred ideal, making it straightforward to assess wear at any point on the route.
Half-rail data is automatically matched with the identified rail section for precise wear analysis.
The AIVR Geometry System Consists of
- Laser line projectors and high-speed filtered cameras mounted beneath the train, capturing rail geometry and profile data at up to 240 measurements per second
- Processing unit with real-time signal processing for sub millimetre accuracy and synchronisation
- Data transmitted automatically to the AIVR Platform via 4G/5G for remote review
- Geometry data is fully synchronised with AIVR Focus line-scanning imagery, enabling direct correlation of geometry exceedances with visual evidence