Flatness measuring device and method for corrugated board production

Abstract

The invention discloses a flatness measuring device and method for corrugated board production. The flatness measuring device mainly comprises a conveying module, a projection module, an acquisition module and an analysis module, wherein the conveying module is used for conveying a to-be-detected corrugated board, the projection module is used for projecting a measurement grid to the surface of the to-be-detected corrugated board, the acquisition module is used for acquiring a measurement image of the measurement grid on the surface of the to-be-detected corrugated board and sending the measurement image to the analysis module, and the analysis module is used for extracting and analyzing each grid line in the measurement image, so that the flatness of the surface of the corrugated board is judged. The flatness detection can be carried out on the surface of the whole corrugated board in a high-precision, high-efficiency and objective manner, and the rejection rate and the failure shutdown rate of subsequent production links are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of corrugated cardboard production detection, in particular to a flatness measuring device and method for corrugated cardboard production. Background technique [0002] The surface smoothness of corrugated cardboard is an important indicator, which has a direct impact on product printing, die-cutting, and slotting. Poor surface smoothness of corrugated cardboard will directly lead to increased scrap rate and downtime rate in subsequent production links. Due to the relationship between humidity, temperature, adhesive thickness, tension and relative humidity and the quality of the cardboard produced by the corrugated cardboard production line, the cardboard produced often has unevenness. In the prior art, visual inspection by quality inspectors is generally used. Its accuracy, objectivity, and efficiency are relatively low; or use the laser emitter and laser receiver placed relatively on the same horizontal li...

AI Technical Summary

Problems solved by technology

[0002] The surface smoothness of corrugated cardboard is an important indicator, which has a direct impact on product printing, die-cutting, and slotting. Poor surface smoothness of corrugated cardboard will directly lead to increased scrap rate and downtime rate in subsequent production links

Due to the relationship between humidity, temperature, adhesive thickness, tension and relative humidity and the quality of the cardboard produced by the corrugated cardboard production line, the cardboard produced often has unevenness. In the prior art, visual inspection by quality inspectors is generally used. Its accuracy, objectivity, and efficiency are relatively low; or use the laser emitter and laser receiver placed relatively on the same horizontal line to detect the surface flatness of corrugated paper, but only the flatness of the laser passing position can be detected. It is impossible to detect the flatness of the entire corrugated cardboard; or, use a video camera combined with image analysis technology to achieve flatness detection; however, since the arch of corrugated paper is generally not prominent in the video screen, it cannot be used for minor arching. Effective detection can only detect serious and obvious arching

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