Three-visual-angle positioning visual mechanism for carton detection

The utility model discloses a three-visual-angle positioning visual mechanism for carton detection, which relates to the technical field of carton packaging detection and comprises a conveying table, a conveying belt is arranged at the top of the conveying table, and the top of the conveying table is symmetrically connected with reference limiting edges in the same direction as the moving direction of the conveying belt. Supporting frames are connected to the top of the conveying table in a staggered mode, the two sets of right-angle workpieces which are arranged in a diagonal staggered mode rotate to extrude the collar edge cover plates which are arranged at the top of a carton in pairs to the outer side, and therefore the cover plates are opened. And reference cameras arranged on the two sides of the carton and a detection camera arranged above the carton are matched to photograph the carton from three visual angles, so that whether the carton arrives at a preset working point position or not and whether th