An automatic grading system and grading method for chicken carcass weight based on machine vision

Abstract

The invention discloses a machine vision-based automatic chicken carcass weight grading system and a grading method. The grading system comprises a camera bellows mounted on an assembly line, light sources, an industrial camera and a photoelectric switch sensor which are arranged in the camera bellows, and an industrial control computer arranged outside the camera bellows, wherein the assembly line penetrates through the camera bellows; a through hole is formed in the side wall of the camera bellows; chicken carcasses on the assembly line pass through the through hole in sequence and enter the camera bellows to reach a shooting position, so that the industrial camera can collect original images; and then the chicken carcasses penetrate through and get out of the camera bellows, and then are conveyed by the assembly line for grading. The machine vision-based automatic chicken carcass weight grading system and the grading method which are provided by the invention realizes indirect contact type weight grading, and can complete weight grading under a condition that the chicken carcasses are only suspended on the production line without touching any other objects, so that the phenomenon that the chicken carcasses are polluted in the grading procedure can be avoided, and fast, stable and accurate grading can be guaranteed.

Description

technical field [0001] The invention relates to an automatic weight grading system and method, in particular to an automatic chicken carcass weight grading system and method based on machine vision, and belongs to the technical field of automatic control. Background technique [0002] Chicken carcass is defined as the whole body of broilers after slaughtering, bleeding, hair removal, claw removal, viscera removal, head removal and other processes. The classification of carcasses is generally based on two aspects: output and quality. The output is classified according to the meat yield of the carcass. For chicken carcasses, it is generally evaluated by direct weighing and graded according to the weight. Carcass grading can enable processing enterprises, distributors and consumers to reach a consensus on product quality and achieve fair and reasonable pricing. Weight grading is the basic link of carcass grading mechanism. Large-scale broiler slaughtering plants not only have w...

AI Technical Summary

Problems solved by technology

Foreign and domestic large-scale manufacturers use automatic grading system, online automatic weighing on the assembly line, data input into computer, and computer controls mechanical device for grading; in addition, small and medium-sized manufacturers also have the phenomenon of manual grading, this method is obviously more efficient than automatic grading system low, high error rate

Although the online weighing speed of the automatic grading system is fast, generally can reach more than 150 per minute, the weighing accuracy is high, generally accurate to ±1g, the range of grading series is wide, and 8-16 levels can be adjusted, but regardless of the automatic grading system. In either weighing method, the chicken carcass must be in direct contact with the scale

However, some studies have pointed out that chopping boards, weighing platforms, and workers' hands in the workshop are the three main sources of pollution of chicken carcasses and their cut products, which makes the washed chicken carcasses subject to secondary pollution, and chicken carcasses are also easy to weigh. Cross-infection is the biggest shortcoming and hidden danger of the automatic grading system

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