Predictive maintenance: Optical monitoring of infrastructure and trains

Eye-safe laser scanners and ultra-fast camera systems for efficient acquisition during regular operation.

Railway Measurement

Fraunhofer IPM develops optical systems for the detection of contact wire wear, contact wire position, clearance profile, position of poles, rail profile, and train geometry. High resolution laser scanners combined with fast image processing provide the necessary measurement data, which is the basis for planning specific maintenance work. The sensors record the measurement data at travel speeds of 100 kilometers per hour and more – quickly, precisely and reliably. Fraunhofer IPM measuring systems are used worldwide to monitor the condition of railway networks.

 

3D Clearance Profile

 

Our laser scanners measure up to 554 profiles per second without contact. This way, objects in the track environment of only a few centimeters in size can be detected even at high travelling speeds.

 

Contact Wire Wear

 

The degree of wear of contact wires with a round cross-section can be calculated from the width of their sliding surface and should not fall below the specified values.

 

Contact Wire
Position

 

A laser scanner measures up to four contact wires simultaneously – independent of lighting conditions.

 

Pole Detection

 

The railway operators use position data from poles as a reference system to locate objects.

 

Tunnel Condition Monitoring

 

The multidimensional inspection determines not only the geometry and surface structure of tunnels but also possible water leaks.

 

Train Monitoring

 

Four stationary laser scanners monitor train geometries at full speed.

As soon as the train has passed through the measuring portal, a 3D point cloud is available. It allows geometrical irregularities – such as protruding loads – to be detected.

 

Track Geometry

 

A laser scanner measures 800 profiles and performs 2 million measurements per second. The measurements result in a high-resolution 3D image. Suitable algorithms extract the desired parameters from the measurement data.

 

Networks

Fraunhofer IPM is member of the Fraunhofer Traffic & Transport Alliance.