A method and system for stretching control of honeycomb paper core based on Hough transform

Abstract

The invention relates to the technical field of image detection, in particular to a Hough transform-based stretching control method and system for a honeycomb paper core. The method includes obtaining the first rotational speed of the first pulling roller and the second rotating speed of the second pulling roller respectively; obtaining the speed ratio of the second and the first rotating speed; obtaining the speed ratio between the first pulling roller and the second pulling roller. The stretched image of the stretched paper core between stretched images, the Hough transform is performed on the edge image of the stretched image to obtain the Hough space image; the highlight point in the Hough space image is identified, and the pixel value of the highlight point at each angle is accumulated to the corresponding cumulative value; filter the cumulative values ​​corresponding to all angles to obtain the three largest cumulative values; based on the average angle between the three filtered cumulative values, according to the difference between the average angle and the standard angle The degree of stretching is obtained; the preset adjustment amount is adjusted according to the product of the speed ratio and the degree of stretching to obtain an updated adjustment amount, so as to adjust the rotational speed of the second pulling roller to achieve the purpose of controlling the stretching.

Description

technical field [0001] The invention relates to the technical field of image detection, in particular to a Hough transform-based stretching control method and system for a honeycomb paper core. Background technique [0002] In the production process of honeycomb paperboard, the stretching process has a greater impact on the quality of the cardboard. That is to say, it is necessary to pull the compacted and continuous paper core to form a honeycomb paper core, and then cover the upper and lower sides of the honeycomb paper core with face paper. Honeycomb paperboard needs to ensure that each honeycomb is uniformly stretched into a regular hexagon in order to meet the requirements of isotropy and meet quality standards. At present, the process is mostly completed by a honeycomb paper core stretching machine. [0003] In practice, the inventor finds that the above-mentioned prior art has the following defects: [0004] Due to the difficulty in precise control of the speed of ...

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Problems solved by technology

[0004] Due to the difficulty in precise control of the speed of the pull-off rollers with different speed ratios in the stretching machine, it often leads to under-stretching or over-stretching of the paper core, resulting in low quality of the finished product, low utilization of the paper core and easy damage to the paper core

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