Areal Deformation Analysis

Precise Monitoring of Shape Changes by Laser Scanning


Terrestrial Laser Scanning opened the door to areal deformation analysis concerning structures, topography and any kind of object. For a long time geodetic deformation analysis had to be based on observations to selected and signalized single points, thus only returning limited information. In contrast, dense point clouds created by a laser scanner enable comparison of different surface states. Nevertheless, when it comes to statistically testing significance of areal 3d deformations, almost no practical solutions exist to date.

TUM Chair of Geodesy is pioneering this research field and contributes original solutions by exploring and tuning novel instruments and features as well as by inventing new algorithms. Successful developments came off by combining scan and image data in monitoring projects concerning towers, landslides and vehicles.

A spectacular case of the latter originated from a cooperation with the Deutsche Museum, the TUM Chair of Conservation-Restoration, Art Technology & Conservation Science and the Fraunhofer EZRT. When the famous streamlines car BMW 328 Wendler had to be transported to and from the EZRT for computer tomography, a combination of two different laser scanner systems was brought into action to check possible smallest shell deformations (unit is 1 mm in figure above) of the unique and invaluable historic racing car.

Link: http://www.deutsches-museum.de/fileadmin/Content/010_DM/050_Forschung/2016/Danz_Expose.pdf