Advanced online inspection equipment can detect surface defects in the production process of papermaking, film, non-woven fabrics, printing and other enterprises in real time, including dust, scratches, oil drops, black spots, holes, folds, etc. It uses CCD linear array cameras, adjustable high-brightness LED light sources and high-speed digital image preprocessing technology to collect images, and digital image processing and pattern recognition technology to analyze and identify, accurately discover the type and location of surface defects. The system also integrates real-time defect detection, image display, alarm, quality report, defect removal, equipment fault diagnosis and other functions to improve the automation of the production process, reduce manual intervention, and improve product quality and production efficiency.

The GD-WIS surface defect detection system software restores the complete defect image through the image data collected by the camera, records it in the workstation database, and provides detailed reports based on the production cycle. Based on the correct combination of light source, image acquisition and image processing, the GD-WIS surface defect detection and sorting system can detect, display and identify common defects such as holes with a diameter of less than 0.2-1mm, dirt/stains, mosquitoes and other special defects on the paper web in real time, as well as special defects that other special users are concerned about. It also counts the number of roll breaks, the roll break time and the recovery time, and issues an alarm when periodic defects occur, prompting the operator to confirm and handle them as soon as possible.

Technical performance

The surface defect detection system is a detection system based on machine vision technology.

Adopting linear CCD camera technology, real-time and high-speed acquisition of moving paper surface images

Embedded systems can identify defects quickly and accurately

The image workstation fully records all defects and conducts detailed and accurate data analysis on periodic defects

Adopt long-life high-brightness LED cold light source, and adjust the brightness according to different detection environments

Finally, generate quality reports based on user needs and provide quality tracking data

System indicators

LED light source life: 100,000 hours

Imported industrial line array camera

High-speed embedded processing system to pre-process the acquired images

Defect detection resolution can reach 0.2-1 mm (depending on the production vehicle speed and the number of cameras)

Adaptable vehicle speed up to 1500m/min, measurable width up to 15m

Nearly 30 kinds of defects can be detected, including holes, dirt/stains, water/oil drop marks, streaks, damage, edge cracks, missing coating, wrinkles, scratches, dark spots, bright spots, edge damage, black spots, dust, etc.