Paper curling degree detection device with high-precision positioning

Abstract

The invention discloses a paper curling degree detection device with high-precision positioning. According to invention, a target point can be effectively positioned through a laser lamp, manual artificial errors of each shooting are reduced, the positioning time is greatly shortened, and the detection efficiency is improved. Through the cooperative use of a sharp part and a sharp groove, the movable gap between a horizontal rod and a horizontal table can be better reduced, the shaking of a camera is reduced, and the problems that pictures are fuzzy and the measurement difficulty and errors are increased due to the shaking in shooting are prevented. The constant environment of the paper curling process and paper measurement operation is guaranteed through a constant-temperature and constant-humidity test box, and detection errors caused by environmental instability are avoided. According to the invention, the camera is used for photographing and recording the curled paper, thereby notonly being capable of measuring visually and accurately on the picture, but also greatly avoiding manual measurement through a manual caliper at the same time, and avoiding the influence on a measuredvalue due to manual change of a curling effect during the manual operation.

Description

technical field [0001] The invention relates to the technical field of paper detection, in particular to a high-precision positioning paper curl detection device. Background technique [0002] Paper "curl" refers to the wrinkling or warping of paper perpendicular to the direction of paper travel. Viewed along the direction of paper feeding, both sides of the paper or finished product are curled upwards. Due to the rapid development of mechanization and automation of modern packaging machinery, printing companies must have higher and higher requirements for paper. Once the paper raw materials are curled, it will seriously affect the paper feeding of each process on the production line, resulting in paper jams, shutdowns, and blurred wrinkles. Not only reduces the quality of paper printing process, but also greatly reduces the efficiency of the production line. [0003] Furthermore, since one side of the printed finished paper has been covered with ink or varnish, it is diff...

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Problems solved by technology

[0005] Therefore, the curl degree of paper is a very important evaluation index in the paper manufacturing industry, and its test results directly affect the production efficiency and quality of the paper out of the warehouse. Of course, the paper curl degree detection equipment and accuracy must also be the core points of this index. However, the current measurement of paper curl is basically manual measurement with vernier calipers, and the human error is relatively large; at the same time, the placement and measurement environment of the sample paper to be tested cannot be guaranteed, and changes in temperature and humidity will affect the quality of the sample paper to be tested during measurement. Causes secondary curl changes, thus affecting the true value of paper curl

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