Prawn quality detecting-grading device based on machine vision technology

The utility model discloses a prawn quality detecting-grading device based on a machine vision technology. The prawn quality detecting-grading device comprises a blanking system, an image acquiring system, a grading mechanism, a conveyor belt, a computer system and a controller system, wherein a camera is fixed at the top end of an illuminating box; the illuminating box is fixed above the conveyor belt; a white emitting coating is coated on the inner wall of the illuminating box; the light source is an LED (Light-Emitting Diode) soft-strip type light source band which is distributed on the four inner walls of the illuminating box; the light source is used for irradiating upwards and reflected to the surface of the prawn virtue of the white coating on the inner wall. The computer is used for processing the acquired image in real time to obtain the corresponding prawn quality characteristic information and grading the corresponding prawn quality characteristic information, and controlling air injection valves by virtue of the controller. The prawns of different qualities are blown to the corresponding receiving slots while passing through the corresponding air injection valves, and the un-blown prawns directly drop to the receiving slot at the tail end of the conveyor belt. The prawn quality detecting-grading device disclosed by the utility model can be used for quickly and accurately detecting and grading the prawns of different qualities and grades by detecting the morphological characteristics and the color characteristics of the prawns.