Principle and Function of Professional on-line Detection System for Film Surface Defects

In the actual production process of the film, due to the influence of various factors, defects such as holes, mosquitoes, black spots, crystal spots, scratches and spots will appear on the surface of the film, which seriously affects the quality of the film and brings unnecessary losses to the manufacturer. Human eyes often can't judge the defects timely and accurately. The on-line detection system of fine spectrum measurement and control professional film surface defects can detect the surface defects produced in the production process online at high speed and accurately, and display and identify all the surface defects on the film surface. It can detect common surface defects such as dirty spots, stripes, damage, edge cracks, folds, dark spots, bright spots, edge damage, black spots, hair, mosquitoes, etc. with a diameter of 0.01mm-2mm. Powerful surface defect pattern recognition function, according to the characteristics of surface defects, while giving an alarm, it will point out the equipment and process problems causing the surface defects, and guide workers to deal with them in time, so as to effectively save production costs and improve product quality. Therefore, the film defect on-line detection system has become an indispensable detection equipment in the high-speed film production line.

Principle of on-line detection system for film surface defects in precision spectrum measurement and control specialty

The industrial linear CCD camera is erected above the production line, and the bright LED linear condensing cold light source is used for back lighting. The real-time online scanning is carried out through the linear CCD camera and high-speed image processing system. When defects appear in film online production, the system can find defects in time because of the obvious gray-scale difference between defect imaging and normal film products. The system automatically records the image, position and other information of defects, and realizes the automatic labeling and positioning of defects by the marking machine through signal control.

Main functions of on-line detection system for film surface defects in precision spectrum measurement and control specialty

Defect detection and positioning coordinates;

Real time display of test results and retrieval of historical defect images;

Audible and visual alarm, labeling, providing detection result signal;

Statistical analysis of product quality and display the analysis results in various modes.

Main performance of on-line detection system for film surface defects in precision spectrum measurement and control specialty

Typical defects: stain, node, mosquito, foreign matter, oil stain, fold, fiber, etc;

Detection width: it can meet the width of more than 5000mm (different widths can be met through the combination of cameras);

Detection speed: it can adapt to the speed above 300m / min;

Principle and Function of Professional on-line Detection System for Film Surface Defects 1

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