Mobile contact rail detection device and application method thereof

The invention discloses a mobile contact rail detection device, which comprises a trolley arranged on a rail, wherein one side of the trolley is telescopically provided with a measurement unit capableof extending into the lower part of a contact rail, and the trolley is provided with a host in communication connection with the measurement unit; the measurement unit is configured to comprise a first industrial camera, a second industrial camera and a laser, the first industrial camera and the second industrial camera are matched with the contact rail to acquire 3D point cloud and/or picture information; and the laser is arranged on one side of the second industrial camera. According to the mobile contact rail detection device provided by the invention, a measurement probe can be erected below the contact rail through the arranged telescopic measurement unit on the premise of ensuring a reliable measurement reference so as to carry out continuous scanning measurement on the contact rail. The measurement probe i