Detection assembly, man-machine interaction device and mobile platform

The utility model discloses a detection assembly, a man-machine interaction device and a mobile platform, the detection assembly comprises a mounting plate, a containing box, a first driving mechanism and a detection mechanism, the mounting plate is provided with a first surface and a second surface opposite to each other, and the first surface is used for facing a cabin of the mobile platform; the containing box is arranged on the second surface, and a containing groove extending into the containing box is formed in the first surface; the first driving mechanism comprises a rotating shaft which is connected with the mounting plate and is at least partially accommodated in the accommodating groove; the detection mechanism is connected with the rotating shaft in the containing groove, and the rotating shaft rotates to drive the detection mechanism to rotate so that the detection mechanism can be contained in the containing groove, or the detection mechanism is exposed out of the side, opposite to the second surface, of the first surface. By arranging the accommodating box connected with the mounting plate, the detection mechanism is driven by the first driving mechanism to rotate to be exposed out of the cabin to collect external information in the use state, and is accommodated in the accommodating box without being exposed out of the cabin in the non-use state, so that the user experience can be improved.