Abstract: Rail vehicle underframe inspection device that is designed to move under a rail vehicle between the rails of the railway track of the rail vehicle, characterized in that it includes a motor system designed to move the inspection device along the rails, an application block including at least one element of an image sensor that is designed to capture images under the frame of the inspected rail vehicle, and a measuring device that is designed to perform measurements relating to the underframe, wherein the application block is designed to deliver data captured or measured by the element to a processing block, the processing block is designed to process the data delivered by the application block and to determine the inspection status of the inspected rail vehicle as a function of at least the processed data.

Abstract: A method for inspecting the underframe of a railway vehicle by an inspection device that includes a processing block and a motor system, the processing block commanding and controlling the motor system which moves the inspection device until it is positioned at least at one destination point, the method including: given a list of coordinates of points of interest of the underframe expressed in a reference frame having as origin a reference point, moving the inspection device up to a predetermined point whose position relative to the reference point is known, recording the location of the reference point as a function of the position, and determining at least one command to be sent to the motor system in order to position the inspection device at a point of interest from the list based on the coordinates of the point of interest and the location of the reference point.