US Patent 11912317 Rail vehicle and method for surveying a track section

A rail vehicle has a vehicle frame which, supported on on-track undercarriages, is mobile on the rails of a track. The rail vehicle includes a first measuring platform with a first inertial measuring system for recording a track course. A second measuring platform is arranged on the rail vehicle, with a second inertial measuring system and at least one sensor device for recording surface points of a track section. The second measuring platform and the second inertial measuring system enable the movement of the sensor device in the three-dimensional space to be recorded in a simple manner.