A Method of Measuring and Correcting the Rotation Angle of Cup and Bottle Cap Based on Machine Vision

Abstract

The invention discloses a machine vision-based pouring cup bottle cap rotation angle measuring and correcting method. According to the machine vision-based pouring cup bottle cap rotation angle measuring and correcting method, connected region searching and gravity center calculation are adopted to realize circular ring region of interest positioning based on pouring cup bottle cap image characteristics; characteristic strengthened regions in a concave and convex direction are obtained skillfully based on the characteristics of circular ring cut parts; effective calculation of the pouring cup bottle cap rotation angle is realized; the data of the pouring cup bottle cap rotation angle is send to a bottle rotating mechanism, and when bottle bodies are delivered to the bottle rotating mechanism, the bottle bodies are rotated accurately so as to ensure the uniformity of bottle body rotating angle in laser printing. The machine vision-based pouring cup bottle cap rotation angle measuring and correcting method is high in speed, and accuracy, is stable, and is capable of satisfying real-time on-line detection requirements of high speed production lines.

Description

technical field [0001] The invention relates to a method for measuring and correcting the rotation angle of a cup wine bottle cap based on machine vision. Background technique [0002] Laser marking is often used to print the production date, shelf life, batch, etc. of products. Due to its characteristics of non-contact and high speed, it is widely used in industrial manufacturing production lines. For example, laser coding equipment is used in the production line of Koupaijiu such as Gulingshen to print the sales destination and production date on the top of Koupaijiu, which is fast and convenient. However, in actual production, since the cup wine container is similar to the shape of a wine glass, and the cap of the cup wine bottle is provided with a symmetrical pull ring, the cap will spin during the capping process, resulting in different rotation angles of the cup wine. Different, but laser coding requires that the rotation angle of the glass of wine is consistent, othe...

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a method for measuring and correcting the rotation angle of the cup wine bottle cap based on machine vision, which overcomes the problem of inconsistency in the rotation angle of the bottle during laser printing on the high-speed production line in the prior art, and the method of the invention can effectively calculate the output The rotation angle of the glass bottle cap and send the angle to the bottle rotation mechanism. When the bottle body reaches the position of the bottle rotation mechanism, the bottle body is rotated precisely to ensure the consistency of the rotation angle of the bottle body during laser printing.

Images