Application of Industrial Vision in Thin Film Inspection System

With the development of science and technology and the increase in demand, more and more film production enterprises are demanding faster and higher production lines. However, relying on manual inspection has long been unable to meet the needs of production and high-speed film production lines, and it is easy to cause quality loss. Film surface defects Defect detection is mainly to detect various stains, impurities, mosquitoes and holes in the film surface during the production process. Human eyes often can't judge defects in time and accurately. The film surface defect detection system can perform high-speed and accurate detection of surface defect defects generated during the production process, and display and identify all surface defects on the film surface.

Beijing Kezhizhi uses high-resolution line-array cameras, high-definition lenses and supporting line light sources and other hardware equipment, and with the strength of software technology, it can build a film surface defect defect detection system that meets the requirements of customers, and the system can accurately identify Defects in film production can be used to timely feedback defect information on the surface of the production line and classify these defects, which greatly improves the production efficiency, saves costs, and better guarantees the quality of the film compared to manual defect detection.

Machine vision hardware

The system can detect common surface defects such as dirty spots, streaks, damage, edge cracks, wrinkles, dark spots, bright spots, edge breaks, black spots, hair, mosquitoes and other common surface defects on the film, so the film surface detection system becomes a high-speed film Indispensable testing equipment in the production line.

When the production line is in normal production, the bright LED linear condenser cold light source uses the transmission principle to illuminate the surface of the production line (for opaque film products, the reflection detection principle is used), and the real-time synchronous scanning is performed by the line array camera installed on the production line. The system uses the image processing system software to perform flaw recognition processing on the thin film images collected by the camera. Due to the obvious difference between the gray level of the defective image and the normal product, the system can find the defect, and at the same time, effectively determine, classify and perform subsequent processing on the defect.

Thin film inspection system

Defect sample map:

Film defect sample

Advantages of the detection system:

1. Easy operation: Just click "Start" and "Stop" to complete all operations.

2. High stability: It can work continuously in the factory environment and can perform 24 hours uninterrupted testing.

3.100% format surface inspection: When a defect is found, an alarm can be issued according to the setting to prompt timely repair to avoid the occurrence of a large number of defective products.

4. High-precision inspection: The solution can detect 100% of the defects that require higher accuracy, and meet customers' continuously improving product quality requirements.

5. Software database management function: accurate quality statistics can be performed on each roll of material produced, detailed defect records (size and location) and statistics provide convenience for production process and equipment status adjustment; offline analysis for subsequent slitting And quality management can effectively guarantee product quality.

6. System linkage: when the system detects a defect, it will sound and light alarm, and other chain I / O outputs can be added to the system.

7. Positioning identification function: for each roll of product produced, the system will automatically calculate the surface defects of this roll of product, at the same time print a statistical label, affixed to each roll of product, and follow the product distribution downstream. In this way, users can rate the product by the label on each roll of product, so as to effectively use for different purposes with different quality requirements.

8. One-click export: export the EXCEL defect list, which is convenient for users to do further query, analysis, and file creation.