Method for eliminating water drop influence in PET bottle detection and orientation

Abstract

The invention discloses a method for eliminating water drop influence in PET bottle detection and orientation, comprising the following steps of: acquiring a regional image of a PET bottle blank-holding ring which moves along a chain channel and inputting the regional image into a computer system, arranging the moving direction of the chain channel from right to left, respectively connecting a line between the second intersection point on the left side of the blank-holding ring and n intersection points on the far right side, finding the intersection point with the minimum angle, and further eliminating the influence of water drop on the orientation of the blank-holding ring. By the adoption of the method for the datum orientation of the blank-holding ring, the influence of water drop can be eliminated and the accuracy of the detection can be raised.

Description

technical field [0001] The invention belongs to the technical field of machine vision, and in particular relates to a method for eliminating the influence of water drops in PET bottle detection. Background technique [0002] With the improvement of people's living standards, the market demand for beverages is also increasing, and the quality of products has become a concern of producers and consumers. The appearance of the beverage bottle directly or indirectly affects the quality of the beverage inside. Therefore, in order to reduce the number of substandard products, it is necessary to increase the inspection process. Manual appearance inspection and product marking are expensive and unreliable, and at the same time mean that it is not humane. monotonous work. However, in the positioning of PET bottles in the machine vision industry to hold embryo rings, there is a problem that the positioning will be slightly deviated due to the influence of water droplets, making the ab...

AI Technical Summary

Problems solved by technology

The appearance of the beverage bottle directly or indirectly affects the quality of the beverage inside. Therefore, in order to reduce the number of substandard products, it is necessary to increase the inspection process. Manual appearance inspection and product marking are expensive and unreliable, and at the same time mean that it is not humane. monotonous work

However, in the positioning of PET bottles in the machine vision industry to hold embryo rings, there is a problem that the positioning will be slightly deviated due to the influence of water droplets, making the above positioning inaccurate. Mildew will occur and affect food safety. In order to prevent the liquid remaining at the mouth of the bottle during the filling process, a thin water tube is generally used to spray it, which leads to many water droplets hanging on it when the cap is screwed. Although the manufacturer uses A large amount of compressed air is eliminated, but the existence of a small amount of water droplets cannot be avoided, which eventually leads to certain false rejections due to inaccurate positioning of the reference position, which affects the characteristics of improving operating efficiency and inspection quality

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