Unmanned vehicle for displacing in particular dung from the floor of a shed, which comprises a frame (10), with disposed thereon material displacing means (18), propelling means (12, 14, 14') and navigation means with a sensor (24, 28) for forming an image of an observation area, the sensor (24, 28) comprising a source of radiation for modulated electromagnetic radiation (26, 36), in particular light, a receiver device for electromagnetic radiation reflected by an object (44) in the observation area, and sensor image processing means, wherein the receiver device comprises a matrix with a plurality of rows and a plurality of columns of receivers, and the sensor image processing means are arranged to determine for each of the receivers a phase difference between the emitted and the reflected electromagnetic radiation in order to calculate a distance from the receiver to the object (44). Such a vehicle is capable of detecting and displacing material to be displaced in a very reliable manner by means of the depth image obtained by means of the sensor.
