Crack recognition device for debris flow geological disaster survey

A crack recognition device for debris flow geological disaster survey is used for unmanned aerial vehicle survey and comprises a fixing block, a reflective surface layer arranged on the first face of the fixing block and a fixing rubber component arranged on the second face of the fixing block. The glue fixing component comprises a fixing cavity used for containing glue, an opening formed in the lower end of the fixing cavity, a liquid outlet pipe connected with the opening, a sealing film arranged on the side, close to the opening, of the liquid outlet pipe, a movable plate slidably connected to the pipe wall of the liquid outlet pipe, and a pricking needle arranged on the first face of the movable plate and facing the sealing film. The top block is arranged on the second surface of the movable plate and extends out of the liquid outlet pipe, and the maximum distance of the top block protruding out of the liquid outlet pipe is larger than the maximum distance between the pricking needle and the sealing film.