Mobile mapping is a solution of choice for an efficient and accurate input of every element of a railroad network. Image and laser sensors combined in a mobile system usable on rails allows us to complete three major application:
Modern mobile measurements systems allows surveys up to 100Km/h without a significant loss of the data quality. Large railroads sections can be plotted in a short period of time. Mobile mapping is also a non-invasive method because no human presence is required on the rails. These factors represent considerable advantages for the manager:
Scanners with the pulsed lidar technology (as deployed on our systems) are capable to detect very small objects and give a very high density point cloud, allowing to capture every railroad installations details including cables of contact lines. Combination with imaging helps to identify the measured objects. Among other thigs, this enables to:
Depending on the on wheel equipment available, the network’s typology (road’s width, topography) and sensors used (Laser and/or 360° images), different set up solution are necessary:
Railroads networks are often equipped with reference points at regular distances. Those point can be seen along with special targets which allow an accurate detection in the point cloud and data registration.
Thanks to registration algorithms on detected points from the measurements, mobile mapping can give precise results in an environment without GPS signal as well (tunnels, parking lots, urban environment). Thereby, precision around 1-2cm (1σ) can be reached by the point cloud even on sections in galleries or tunnel.
