New technology in the field of precision testing: CCD visual inspection system

CCD vision inspection system is a new technology with development potential in the field of precision testing technology, integrated use of electronics, photoelectric detection, image processing and computer technology, the machine vision is introduced into the industrial inspection to achieve the surface characteristics, size or position of the object rapid detection, with non-contact, fast speed, good flexibility and other outstanding advantages.

CCD metal surface defect visual detection system is installed on the production line of metal products with regular shape, which can carry out online detection of surface defects and dimensions of each product on the production line, especially for the surface quality detection effect of products with metallic luster. When the defective workpiece is detected, the system can send out the corresponding control signal according to the actual demand, which can directly remove the waste product, and can also control the marking mechanism to spray the mark on the defective product.

This system can effectively improve product quality, work efficiency, reduce labor intensity and save human resources. The quality standard can be set through the program and is not affected by subjective factors, so it can ensure the unity of the quality standard and there will be no missed inspection.

CCD visual inspection system application range:

CCD metal surface defect visual inspection system is suitable for detecting the surface quality of products with metallic luster surface. For products that need to detect both upper and lower surfaces, two solutions can be taken: one is to detect both upper and lower surfaces at the same detection position; First, the reverse side of the product is tested in another station through the mechanical flipping mechanism. The appropriate detection scheme can be selected according to the actual situation.

CCD metal surface defect visual inspection system can be applied to the production line, but also can be matched with a special quality inspection machine; It can be applied to the detection of individual separated workpieces, such as coins, optical discs, display screens, etc., and can also be applied to continuous product detection, such as strip steel, paper making, aluminum film, non-woven fabrics, glass and other production processes.

CCD metal surface defect visual detection system can also be used in high-precision dimensional detection, especially in some dynamic detection nickel plated (zinc) parts (discs or rings) dimensional applications, to solve the user mass production of such parts for manual quality detection of slow speed, accuracy is not uniform, large amount of labor problems.

For the detection of products with patterns and different color patterns, the system can effectively control the rejection rate in the production process and improve the quality rate of products, such as the quality detection of coins, commemorative coins and color coins.

CCD visual inspection system features:

1. The unique lighting design of the system fully solves the problem of reflection on the metal surface, and the brightness of the product image is uniform, which can truly reflect the surface of the actual product, especially for the fine defects that are not easy to find on the surface of the product

2. The system adopts the current mainstream mechanical product conveying and finishing methods to ensure that each product can be accurately detected and each waste can be accurately removed

3. The system adopts a more reliable image analysis algorithm to ensure that all kinds of defects can be accurately detected and are not affected by small changes in lighting

4. A higher precision edge extraction algorithm is adopted in the size detection. The 1/20 pixel analysis algorithm ensures a higher size detection accuracy under the current system accuracy

5. For many defects that are not easy to identify, the system adopts intelligent algorithm design and completely simulates manual inspection methods. The fuzzy recognition algorithm adopted not only improves the detection rate of these defects, but also effectively controls the false detection rate of such defects, which has higher accuracy and efficiency than manual inspection

6. CCD visual inspection system software interface style is fresh, easy to operate, easy to master, completely according to the working habits of the operator to design, so more user-friendly

7. The system can locate and analyze some problems existing in the production process according to the defect data saved by detection

8. The system hardware design is reasonable, the operation is stable, safe and reliable, especially in the industrial site has a strong anti-interference ability

CCD visual inspection system performance indicators:

Surface cracks and scratches can be detected with a width greater than 0.05mm

Can detect surface oil, water, dark, light

Detect surface irregularities (dents or bumps)

Detect surface pattern defects

Detect geometry, edge smoothness, and workpiece dimensions

If the color CCD camera is used, the color difference of the product surface pattern can be accurately detected

The detection speed can adapt to the operation of different equipment

Alarm and reject mode can be freely set according to specific needs

The defect criteria can be set by software or by automatic learning

The test results are stored in the database for easy query and process analysis

When the system detects the quality problem, it can send out the sound and light alarm signal and the corresponding control signal.