Road surface detection device

The utility model relates to a road surface detection device. The road surface detection device comprises a device main body and a terahertz imaging assembly, a penetrating part is arranged at the bottom of the device body. The terahertz imaging assembly is arranged on the device body, and terahertz waves emitted by the terahertz imaging assembly can penetrate through the penetrating part. Adjusting the terahertz imaging assembly to enable the propagation path of terahertz waves emitted by the terahertz imaging assembly to be focused on the detection area of the road surface, and performing tomography scanning on the detection area to obtain tomography scanning data. Whether microcracks, cavities, aggregate adhesion and the like exist in the detection area of the road surface or not is visually judged through the tomographic scanning image of the detection area, and the damage condition of the road surface is judged. Moreover, the terahertz signal index of the detection area can be obtained, and the terahertz